/* Critical visibility fix: CSS display rules must never override the HTML hidden attribute */
[hidden]{
  display:none !important;
}

@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@300;400;500;600;700;800&display=swap');

:root{
  --bg:#fbf8f3;
  --surface:#fffdfa;
  --surface-2:#f5efe7;
  --ink:#272321;
  --muted:#746d67;
  --line:#e6ddd3;
  --red:#9d171b;
  --red-2:#bd2529;
  --gold:#a48250;
  --green:#2f8b57;
  --shadow:0 14px 42px rgba(61,43,31,.09);
  --shadow-sm:0 7px 22px rgba(61,43,31,.08);
  --radius:20px;
  --radius-sm:13px;
  --container:1450px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Prompt",Tahoma,Arial,sans-serif;line-height:1.55}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%}
.container{width:min(var(--container),calc(100% - 48px));margin-inline:auto}
.section{padding:72px 0}
.section-tight{padding:44px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--red);font-weight:600;font-size:.92rem;letter-spacing:.02em}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--red)}
.section-title{margin:8px 0 10px;font-size:clamp(1.8rem,2.5vw,2.8rem);line-height:1.2}
.section-subtitle{margin:0;color:var(--muted)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
.text-link{color:var(--red);font-weight:600}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,253,250,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(230,221,211,.9)}
.navbar{height:74px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{font-size:1.55rem;font-weight:800;letter-spacing:.03em;white-space:nowrap}
.brand span{color:var(--red)}
.main-nav{display:flex;align-items:center;gap:12px}
.main-nav a{position:relative;padding:25px 13px 22px;font-size:.93rem;font-weight:500;color:#4b4540}
.main-nav a::after{content:"";position:absolute;left:16px;right:16px;bottom:14px;height:2px;border-radius:2px;background:var(--red);transform:scaleX(0);transition:.2s}
.main-nav a:hover,.main-nav a.active{color:var(--red)}
.main-nav a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px}
.icon-btn{height:42px;min-width:42px;border:1px solid transparent;background:transparent;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:8px;color:#3c3733;padding:0 10px}
.icon-btn:hover{background:var(--surface-2);border-color:var(--line)}
.icon{width:21px;height:21px;display:inline-grid;place-items:center;font-size:1.16rem}
.cart-badge{display:grid;place-items:center;position:absolute;top:-4px;right:-4px;width:19px;height:19px;border-radius:999px;background:var(--red);color:white;font-size:.68rem;font-weight:700}
.cart-wrap{position:relative}
.menu-toggle{display:none}

/* Buttons */
.btn{border:1px solid transparent;border-radius:14px;padding:13px 22px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;transition:.22s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--red),var(--red-2));color:white;box-shadow:0 9px 24px rgba(157,23,27,.2)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(157,23,27,.26)}
.btn-secondary{background:white;color:var(--red);border-color:#d8b2b3}
.btn-secondary:hover{background:#fff4f3}
.btn-ghost{background:transparent;border-color:var(--line);color:#4b4540}
.btn-sm{padding:10px 15px;border-radius:11px;font-size:.86rem}
.btn-block{width:100%}

/* Home hero */
.hero{position:relative;min-height:650px;display:grid;place-items:center;overflow:hidden;background:#3c3129}
.hero::before{content:"";position:absolute;inset:-20px;background:url('assets/hero-home.jpg') center/cover no-repeat;transform:scale(1.02)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(35,27,22,.54),rgba(35,27,22,.27) 55%,rgba(35,27,22,.44)),linear-gradient(0deg,rgba(28,21,17,.34),transparent 50%)}
.hero-inner{position:relative;z-index:2;text-align:center;color:white;padding:80px 0;max-width:1000px}
.hero-kicker{font-size:1.06rem;font-weight:500;letter-spacing:.06em;text-transform:uppercase;opacity:.92}
.hero h1{font-size:clamp(3rem,6.3vw,6.4rem);line-height:1.02;margin:18px 0 20px;letter-spacing:-.03em;text-shadow:0 8px 30px rgba(0,0,0,.28)}
.hero p{font-size:clamp(1rem,1.6vw,1.35rem);max-width:760px;margin:0 auto 34px;opacity:.95}
.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.hero .btn{padding:16px 28px;border-radius:999px}
.hero .btn-secondary{background:rgba(255,255,255,.93);border-color:rgba(255,255,255,.5);color:#493c34}
.hero-note{margin-top:24px;font-size:.84rem;opacity:.78}

/* Categories */
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.category-card{position:relative;overflow:hidden;min-height:205px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);transition:.25s}
.category-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.category-card::after{content:"";position:absolute;width:210px;height:210px;border-radius:50%;right:-75px;bottom:-95px;background:radial-gradient(circle,rgba(157,23,27,.10),transparent 68%)}
.category-icon{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:white;font-size:1.45rem;margin-bottom:20px}
.category-card:nth-child(even) .category-icon{background:var(--gold)}
.category-card h3{margin:0 0 7px;font-size:1.15rem}
.category-card p{margin:0;color:var(--muted);font-size:.9rem;max-width:250px}
.category-arrow{position:absolute;right:20px;bottom:18px;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);background:white;color:var(--red)}

/* Product card */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.product-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:.22s}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.product-image{position:relative;aspect-ratio:16/10;overflow:hidden;background:#eadfd3}
.product-image img{width:100%;height:100%;object-fit:cover;transition:.35s}
.product-card:hover .product-image img{transform:scale(1.035)}
.pdf-badge,.sale-badge{position:absolute;top:12px;padding:5px 9px;border-radius:8px;font-size:.72rem;font-weight:700;color:white}
.pdf-badge{right:12px;background:var(--red)}
.sale-badge{left:12px;background:var(--gold)}
.wishlist{position:absolute;right:12px;bottom:12px;width:38px;height:38px;border:0;border-radius:50%;background:rgba(255,255,255,.93);box-shadow:0 5px 15px rgba(0,0,0,.12);font-size:1.1rem}
.wishlist.active{color:white;background:var(--red)}
.product-body{padding:18px;display:flex;flex-direction:column;flex:1}
.product-title{font-size:1.04rem;font-weight:650;line-height:1.4;margin:0 0 7px}
.product-desc{font-size:.84rem;color:var(--muted);margin:0 0 14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;gap:10px}
.product-price{font-size:1.15rem;color:var(--red);font-weight:700}
.rating{font-size:.79rem;color:#9d8b72}
.product-actions{display:grid;grid-template-columns:1fr 1.15fr;gap:9px;margin-top:14px}

/* Trust strip */
.trust-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:18px;overflow:hidden}
.trust-item{background:var(--surface);padding:20px;display:flex;align-items:center;justify-content:center;gap:13px;text-align:left}
.trust-icon{font-size:1.5rem;color:var(--red)}
.trust-item strong{display:block;font-size:.92rem}
.trust-item small{display:block;color:var(--muted);font-size:.75rem}

/* Page banner */
.page-banner{position:relative;min-height:245px;display:flex;align-items:center;color:white;overflow:hidden;background:#3a2d26}
.page-banner::before{content:"";position:absolute;inset:0;background:var(--banner) center/cover no-repeat}
.page-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(30,22,18,.72),rgba(30,22,18,.28))}
.page-banner .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:.82rem;opacity:.84;margin-bottom:9px}
.page-banner h1{font-size:clamp(2.2rem,4vw,4.2rem);margin:0 0 8px;line-height:1.15}
.page-banner p{margin:0;font-size:1rem;opacity:.92}

/* Catalog */
.catalog-layout{display:grid;grid-template-columns:280px 1fr;gap:28px;align-items:start}
.filter-panel{position:sticky;top:95px;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow-sm)}
.filter-title{display:flex;align-items:center;gap:9px;font-size:1.08rem;margin:0 0 12px}
.filter-group{padding:16px 0;border-top:1px solid var(--line)}
.filter-group:first-of-type{border-top:0}
.filter-group h4{margin:0 0 10px;font-size:.9rem}
.check-row{display:flex;gap:9px;align-items:center;margin:8px 0;color:#5f5852;font-size:.84rem}
.check-row input{accent-color:var(--red);width:16px;height:16px}
.range-row{display:flex;align-items:center;gap:8px}
.range-row input{width:100%;min-width:0;border:1px solid var(--line);border-radius:9px;padding:9px;background:white}
.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:17px}
.results-count{color:var(--muted);font-size:.9rem}
.toolbar-actions{display:flex;gap:10px;align-items:center}
.select{border:1px solid var(--line);background:white;border-radius:11px;padding:10px 38px 10px 12px;color:#4d4742}
.view-toggle{border:1px solid var(--line);background:white;border-radius:11px;padding:9px 12px;color:var(--red)}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:32px}
.page-dot{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:white;border:1px solid var(--line)}
.page-dot.active{background:var(--red);color:white;border-color:var(--red)}

/* Exam library */
.exam-search{display:flex;max-width:760px;margin:26px auto 0;background:white;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.exam-search input{border:0;outline:0;flex:1;padding:15px 18px}
.exam-search button{border:0;background:white;padding:0 18px;font-size:1.25rem}
.chip-row{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 30px}
.chip{border:1px solid var(--line);background:white;border-radius:12px;padding:10px 17px;color:#5c554f}
.chip.active,.chip:hover{background:var(--red);border-color:var(--red);color:white}
.exam-layout{display:grid;grid-template-columns:1fr 270px;gap:25px}
.info-panel{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow-sm)}
.info-point{display:flex;gap:12px;padding:18px 0;border-bottom:1px solid var(--line)}
.info-point:last-child{border-bottom:0}
.info-point .i{font-size:1.45rem;color:var(--gold)}
.info-point strong{display:block;font-size:.9rem}
.info-point small{color:var(--muted)}
.two-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.soft-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow-sm)}
.list-row{display:grid;grid-template-columns:70px 1fr auto;gap:12px;align-items:center;padding:13px 0;border-top:1px solid var(--line)}
.list-row:first-of-type{border-top:0}
.mini-thumb{width:70px;height:62px;border-radius:10px;object-fit:cover}
.list-row h4{margin:0;font-size:.87rem}
.list-row p{margin:4px 0 0;color:var(--muted);font-size:.76rem}
.price{color:var(--red);font-weight:700}

/* Product detail */
.product-detail{display:grid;grid-template-columns:1.35fr .85fr;gap:40px;align-items:start;padding-top:34px}
.gallery-main{background:#efe4d6;border-radius:22px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.gallery-main img{width:100%;aspect-ratio:16/9.25;object-fit:cover}
.gallery-thumbs{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:12px}
.gallery-thumbs button{padding:0;border:2px solid transparent;background:none;border-radius:11px;overflow:hidden}
.gallery-thumbs button.active{border-color:var(--red)}
.gallery-thumbs img{width:100%;height:75px;object-fit:cover}
.product-info{position:sticky;top:100px}
.product-info h1{font-size:clamp(1.8rem,3vw,3.05rem);line-height:1.25;margin:0 0 14px}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.badge{padding:7px 11px;border-radius:999px;background:#efe9e2;color:#554d47;font-size:.78rem;font-weight:600}
.badge.red{background:#fff0ef;color:var(--red)}
.badge.green{background:#edf7f0;color:var(--green)}
.detail-price{font-size:2rem;font-weight:800;color:var(--red);margin:8px 0 18px}
.spec-list{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;margin-bottom:20px}
.spec{display:grid;grid-template-columns:135px 1fr;gap:10px;padding:8px 0;font-size:.9rem}
.spec span:first-child{color:var(--muted)}
.buy-row{display:grid;grid-template-columns:1.1fr 1fr 54px;gap:10px}
.square-btn{border:1px solid var(--line);background:white;border-radius:14px;font-size:1.2rem}
.assurance{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px}
.assurance div{background:var(--surface);border:1px solid var(--line);border-radius:12px;text-align:center;padding:12px 7px;font-size:.76rem;color:#5c554f}
.detail-panels{display:grid;grid-template-columns:1.1fr .75fr 1fr;gap:20px;margin-top:38px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:23px;box-shadow:var(--shadow-sm)}
.panel h3{margin:0 0 15px;font-size:1.1rem}
.bullet-list{padding:0;margin:13px 0 0;list-style:none}
.bullet-list li{margin:10px 0;padding-left:26px;position:relative;color:#5d5650;font-size:.87rem}
.bullet-list li::before{content:"✓";position:absolute;left:0;color:var(--red);font-weight:800}
.rating-big{font-size:3.5rem;font-weight:800;line-height:1}
.stars{color:#f2ac23;letter-spacing:2px}
.rating-bar{display:grid;grid-template-columns:30px 1fr 26px;gap:8px;align-items:center;font-size:.76rem;margin:7px 0}
.bar{height:7px;background:#ece6df;border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:#e7a31c}

/* Dashboard */
.dashboard-wrap{display:grid;grid-template-columns:280px 1fr;gap:30px;padding:34px 0 70px}
.account-sidebar{background:var(--surface);border:1px solid var(--line);border-radius:19px;padding:22px;box-shadow:var(--shadow-sm);align-self:start;position:sticky;top:96px}
.avatar{width:82px;height:82px;border-radius:50%;display:grid;place-items:center;background:#efe7dc;font-size:2.1rem;color:#7f6446;margin:0 auto 12px}
.account-name{text-align:center;margin:0;font-size:1.05rem}
.account-tier{text-align:center;color:var(--muted);font-size:.82rem;margin:4px 0 20px}
.account-tier span{color:var(--red)}
.side-nav{display:grid;gap:5px;border-top:1px solid var(--line);padding-top:15px}
.side-nav a{padding:11px 13px;border-radius:11px;color:#5b544e;font-size:.88rem}
.side-nav a.active{background:var(--red);color:white}
.coupon{margin-top:18px;padding:16px;border-radius:14px;background:#f6f0e7;border:1px solid var(--line)}
.coupon strong{display:block}
.coupon-code{margin:10px 0;border:1px dashed #bca47f;border-radius:10px;padding:9px;text-align:center;font-weight:700;letter-spacing:.08em}
.dashboard-title{font-size:2.7rem;margin:0 0 20px}
.welcome-card{position:relative;overflow:hidden;background:linear-gradient(120deg,#f5eee5,#fffdfa);border:1px solid var(--line);border-radius:20px;padding:26px;min-height:160px;display:flex;align-items:center;box-shadow:var(--shadow-sm)}
.welcome-card::after{content:"";position:absolute;right:0;top:0;bottom:0;width:42%;background:url('assets/dashboard-decor.jpg') center/cover no-repeat;mask-image:linear-gradient(90deg,transparent,#000 35%)}
.welcome-card > div{position:relative;z-index:2}
.welcome-card h2{margin:0 0 6px}
.welcome-card p{margin:0;color:var(--muted)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin:20px 0}
.stat-card{background:var(--surface);border:1px solid var(--line);border-radius:17px;padding:20px;box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:15px}
.stat-icon{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:white;font-size:1.3rem}
.stat-card:nth-child(even) .stat-icon{background:var(--gold)}
.stat-card strong{font-size:1.7rem;display:block;line-height:1}
.stat-card small{color:var(--muted)}
.download-table{background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow-sm)}
.table-head,.file-row{display:grid;grid-template-columns:1.8fr .6fr .65fr .55fr;gap:15px;align-items:center;padding:14px 18px}
.table-head{background:#f4eee7;color:#6b625b;font-size:.78rem;font-weight:600}
.file-row{border-top:1px solid var(--line)}
.file-title{display:flex;align-items:center;gap:11px}
.file-icon{width:38px;height:42px;border-radius:8px;display:grid;place-items:center;background:#a51a1f;color:white}
.file-title strong{display:block;font-size:.88rem}
.file-title small,.file-date small{color:var(--muted);font-size:.72rem}
.status{display:inline-flex;align-items:center;gap:6px;background:#e9f5ec;color:var(--green);padding:6px 10px;border-radius:999px;font-size:.72rem;width:max-content}

/* Cart drawer/toast */
.overlay{position:fixed;inset:0;background:rgba(21,16,13,.45);z-index:89;opacity:0;pointer-events:none;transition:.25s}
.overlay.open{opacity:1;pointer-events:auto}
.cart-drawer{position:fixed;top:0;right:0;bottom:0;width:min(430px,92vw);background:var(--surface);z-index:90;transform:translateX(100%);transition:.3s;box-shadow:-22px 0 60px rgba(0,0,0,.2);display:flex;flex-direction:column}
.cart-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;justify-content:space-between;align-items:center;padding:22px;border-bottom:1px solid var(--line)}
.drawer-head h3{margin:0}
.drawer-close{border:0;background:transparent;font-size:1.5rem}
.cart-items{padding:12px 22px;overflow:auto;flex:1}
.cart-item{display:grid;grid-template-columns:72px 1fr auto;gap:11px;padding:14px 0;border-bottom:1px solid var(--line)}
.cart-item img{width:72px;height:60px;border-radius:10px;object-fit:cover}
.cart-item h4{margin:0;font-size:.86rem}
.cart-item small{color:var(--muted)}
.remove-item{border:0;background:none;color:var(--red)}
.drawer-footer{border-top:1px solid var(--line);padding:20px 22px}
.total-row{display:flex;justify-content:space-between;margin-bottom:13px;font-size:1.06rem}
.toast{position:fixed;right:28px;bottom:28px;background:#2d2926;color:white;padding:13px 18px;border-radius:12px;z-index:120;box-shadow:var(--shadow);opacity:0;transform:translateY(14px);pointer-events:none;transition:.25s}
.toast.show{opacity:1;transform:translateY(0)}

/* Footer */
.site-footer{background:#28221f;color:#eee5dc;margin-top:30px}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:35px;padding:52px 0}
.footer-brand{font-size:1.55rem;font-weight:800}.footer-brand span{color:#e46c6f}
.footer-grid p{color:#bfb4aa;font-size:.86rem}
.footer-grid h4{margin:0 0 14px}
.footer-links{display:grid;gap:9px;color:#cbbfb4;font-size:.85rem}
.footer-bottom{border-top:1px solid #443b36;padding:18px 0;color:#9f938a;font-size:.78rem;display:flex;justify-content:space-between}

@media (max-width:1180px){
  .main-nav{gap:2px}.main-nav a{padding-inline:9px;font-size:.86rem}.nav-actions .label{display:none}
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .catalog-layout{grid-template-columns:240px 1fr}
  .detail-panels{grid-template-columns:1fr 1fr}.detail-panels .panel:last-child{grid-column:1/-1}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .container{width:min(100% - 30px,var(--container))}
  .navbar{height:66px}.menu-toggle{display:inline-flex}
  .main-nav{position:fixed;left:15px;right:15px;top:76px;display:grid;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:10px;transform:translateY(-20px);opacity:0;pointer-events:none;transition:.2s}
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .main-nav a{padding:12px 14px;border-radius:10px}.main-nav a::after{display:none}.main-nav a.active{background:#fff0ef}
  .hero{min-height:570px}.hero h1{font-size:clamp(3rem,12vw,5rem)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .trust-strip{grid-template-columns:repeat(2,1fr)}
  .catalog-layout,.exam-layout,.product-detail,.dashboard-wrap{grid-template-columns:1fr}
  .filter-panel,.product-info,.account-sidebar{position:static}
  .filter-panel{display:grid;grid-template-columns:repeat(2,1fr);gap:0 20px}.filter-title{grid-column:1/-1}
  .detail-panels{grid-template-columns:1fr}.detail-panels .panel:last-child{grid-column:auto}
  .dashboard-wrap{padding-top:22px}.side-nav{grid-template-columns:repeat(3,1fr)}.side-nav a{text-align:center}
  .account-sidebar .avatar,.account-name,.account-tier,.coupon{display:none}
  .table-head{display:none}.file-row{grid-template-columns:1fr auto;gap:10px}.file-row>*:nth-child(2),.file-row>*:nth-child(3){display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .section{padding:50px 0}.section-head{align-items:start;flex-direction:column;margin-bottom:22px}
  .brand{font-size:1.15rem}.nav-actions{gap:2px}.icon-btn{padding:0 7px;min-width:38px}
  .hero{min-height:530px}.hero-inner{padding:60px 0}.hero h1{font-size:2.75rem}.hero p{font-size:.94rem}
  .category-grid,.product-grid,.two-cols,.stat-grid{grid-template-columns:1fr}
  .category-card{min-height:180px}
  .trust-strip{grid-template-columns:1fr}.trust-item{justify-content:flex-start}
  .page-banner{min-height:220px}.page-banner h1{font-size:2.2rem}
  .filter-panel{display:block}.catalog-toolbar{align-items:flex-start;flex-direction:column}.toolbar-actions{width:100%}.select{flex:1}
  .exam-layout{display:block}.info-panel{margin-top:20px}.chip-row{overflow:auto;flex-wrap:nowrap;padding-bottom:4px}.chip{white-space:nowrap}
  .gallery-thumbs{grid-template-columns:repeat(3,1fr)}.gallery-thumbs img{height:68px}
  .buy-row{grid-template-columns:1fr 54px}.buy-row .btn-secondary{grid-column:1/-1;grid-row:2}
  .assurance{grid-template-columns:1fr}
  .account-sidebar{padding:12px}.side-nav{grid-template-columns:repeat(2,1fr)}
  .welcome-card::after{opacity:.35;width:70%}.welcome-card{min-height:190px}
  .file-row{padding:14px}.file-title strong{font-size:.82rem}
  .footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:8px}
}


/* ---------- Own website exam cards ---------- */
.product-actions.single{grid-template-columns:1fr}
.online-badge{background:#275f4a}
.start-exam-button{background:linear-gradient(135deg,#275f4a,#4f9b77);box-shadow:0 9px 24px rgba(39,95,74,.20)}
.exam-card-meta{display:flex;gap:5px;flex-wrap:wrap;margin-bottom:7px}
.exam-card-meta span{padding:4px 7px;border-radius:999px;background:#eff5f1;color:#47675a;font-size:.66rem}
.exam-library-empty{grid-column:1/-1;padding:55px;text-align:center;border:1px dashed var(--line);border-radius:18px;background:white}
#examGrid{grid-template-columns:repeat(4,1fr)}

/* ---------- Own exam application ---------- */
.exam-app-body{background:#fbfdf8}
.own-exam-app{padding:22px 0 65px;background:radial-gradient(circle at 8% 0%,rgba(169,216,191,.30),transparent 28%),radial-gradient(circle at 95% 8%,rgba(219,234,176,.27),transparent 28%),#fbfdf8}
.exam-app-container{width:min(1080px,calc(100% - 28px));margin:auto}
.exam-system-message{min-height:420px;display:grid;place-content:center;text-align:center;color:#668076}
.exam-loader{width:55px;height:55px;margin:auto;border:5px solid #dff3e7;border-top-color:#275f4a;border-radius:50%;animation:examSpin .8s linear infinite}
@keyframes examSpin{to{transform:rotate(360deg)}}
.exam-brand-header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:17px 21px;margin-bottom:16px;border:1px solid rgba(79,155,119,.30);border-radius:23px;background:linear-gradient(135deg,#d9f0e2,#bce1cb 55%,#e7f1c8);box-shadow:0 12px 32px rgba(39,95,74,.12)}
.exam-brand-lockup{display:flex;align-items:center;gap:14px}.exam-brand-mark{width:64px;height:64px;display:grid;place-items:center;border:2px solid rgba(39,95,74,.35);border-radius:19px;background:rgba(255,255,255,.55);color:#275f4a;font-size:25px;font-weight:900}
.exam-brand-name{color:#184936;font-size:clamp(24px,4vw,39px);line-height:1;font-weight:900}.exam-brand-name small{font-size:.48em;opacity:.75}.exam-brand-lockup p{margin:7px 0 0;color:rgba(24,73,54,.74);font-size:11px;font-weight:800;letter-spacing:1px}
.exam-subject-chip{padding:9px 14px;border:1px solid rgba(39,95,74,.26);border-radius:999px;background:rgba(255,255,255,.52);color:#184936;font-size:12px;font-weight:900}
.exam-intro-card{display:grid;gap:16px}.exam-intro-hero,.exam-start-card,.exam-question-card,.exam-result-hero,.exam-review-card{background:#fff;border:1px solid #cfe4d8;border-radius:20px;box-shadow:0 8px 24px rgba(39,95,74,.08)}
.exam-intro-hero{position:relative;padding:28px;border-top:8px solid #4f9b77;overflow:hidden}.exam-intro-hero::after{content:"🧬";position:absolute;right:25px;bottom:-26px;font-size:110px;opacity:.07}
.exam-tag{display:inline-block;padding:5px 9px;border-radius:999px;background:#eef9f2;color:#275f4a;font-size:12px;font-weight:800}.exam-intro-hero h1{margin:9px 0 8px;color:#184936;font-size:clamp(27px,5vw,43px)}.exam-intro-hero>p{margin:0;color:#668076}
.exam-stat-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}.exam-stat-chips span{padding:7px 11px;border:1px solid #cfe4d8;border-radius:999px;background:#eef9f2;color:#275f4a;font-size:12px;font-weight:800}
.exam-notice{margin-top:16px;padding:13px 15px;border-left:5px solid #8faa4a;border-radius:10px;background:#f5fae8;color:#3f554c}
.exam-start-card{padding:24px}.exam-start-card h2{margin-top:0}.exam-start-card label{display:block;margin:15px 0 6px;font-weight:700}.exam-start-card input,.exam-paragraph-answer,.exam-matching-select{width:100%;padding:13px 14px;border:1px solid #bdd6c8;border-radius:12px;background:white;font:inherit;outline:0}.exam-start-card input:focus,.exam-paragraph-answer:focus,.exam-matching-select:focus{border-color:#4f9b77;box-shadow:0 0 0 3px rgba(79,155,119,.15)}
.exam-primary-button,.exam-print-button,.exam-filter{border:0;border-radius:12px;padding:12px 18px;font:inherit;font-weight:800;cursor:pointer}.exam-primary-button{width:100%;margin-top:19px;background:#275f4a;color:white}.exam-primary-button:hover{background:#184936}.exam-form-error{min-height:23px;margin-top:9px;color:#b64242}
.exam-topbar{position:sticky;top:74px;z-index:18;display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:14px;padding:12px 17px;margin-bottom:17px;border:1px solid #cfe4d8;border-radius:0 0 17px 17px;background:rgba(255,255,255,.96);box-shadow:0 6px 18px rgba(39,95,74,.12);backdrop-filter:blur(8px)}
.exam-student{display:flex;align-items:center;gap:8px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.exam-mini-mark{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:linear-gradient(135deg,#275f4a,#4f9b77);color:white;font-size:11px}
.exam-timer{min-width:125px;padding:8px 12px;border-radius:11px;background:#4f9b77;color:white;text-align:center;font-size:23px;font-weight:900}.exam-timer.warning{background:#b67b2e}.exam-timer.danger{background:#b64242}
.exam-section-banner{margin:27px 0 13px;padding:13px 17px;border:1px solid #cfe4d8;border-radius:13px;background:linear-gradient(135deg,#dff3e7,#f3f8d8);color:#184936;font-size:17px;font-weight:900}
.exam-question-card{padding:21px;margin-bottom:15px}.exam-question-head{display:flex;justify-content:space-between;gap:13px}.exam-question-head h3{margin:5px 0 14px;font-size:17px;white-space:pre-line}.exam-topic{color:#4f9b77;font-size:12px;font-weight:900}.exam-point{height:max-content;padding:4px 8px;border-radius:999px;background:#eef9f2;color:#275f4a;font-size:11px;font-weight:800}
.exam-scenario{margin:0 0 13px;padding:13px 14px;border-left:5px solid #a9d8bf;border-radius:10px;background:#f7fbf8;white-space:pre-line}
.exam-choice{display:flex;align-items:flex-start;gap:10px;padding:10px 11px;margin:7px 0;border:1px solid #cfe4d8;border-radius:10px;cursor:pointer;transition:.15s}.exam-choice:hover{background:#eef9f2;border-color:#afd2bd}.exam-choice input{margin-top:5px;transform:scale(1.15);accent-color:#4f9b77}
.exam-paragraph-answer{min-height:180px;resize:vertical}.exam-matching-select{margin-top:8px}
.exam-visual-wrap,.exam-data-table-wrap{margin:11px 0 17px;padding:13px;overflow:auto;border:1px solid #cfe4d8;border-radius:14px;background:linear-gradient(#fbfefc,#f3faf5)}.exam-visual-wrap svg{display:block;width:100%;min-width:650px;height:auto}.exam-data-table-wrap table{width:100%;border-collapse:collapse}.exam-data-table-wrap th,.exam-data-table-wrap td{padding:9px 10px;border:1px solid #cfe4d8;text-align:left}.exam-data-table-wrap th{background:#dff3e7}
.exam-punnett{width:min(520px,100%);margin:auto;display:grid;grid-template-columns:80px repeat(2,1fr);grid-template-rows:65px repeat(2,100px);align-items:stretch;text-align:center;font-size:25px;font-weight:900;color:#184936}.exam-punnett>div{display:grid;place-items:center}.exam-punnett .cell{border:2px solid #4f9b77;background:white}
.exam-meiosis{display:flex;align-items:center;justify-content:center;gap:22px;min-width:650px}.exam-meiosis .stage{display:flex;align-items:center;justify-content:center;gap:7px;width:120px;height:120px;border:4px solid #4f9b77;border-radius:50%;background:#eef9f2;color:#184936;font-size:28px;font-weight:900}.exam-meiosis .two,.exam-meiosis .four{width:auto;border:0;background:none}.exam-meiosis .two span,.exam-meiosis .four span{width:70px;height:70px;display:grid;place-items:center;border:3px solid #4f9b77;border-radius:50%;background:#eef9f2}.exam-meiosis p{text-align:center}
.exam-karyotype{display:grid;grid-template-columns:repeat(6,100px);gap:16px 10px;min-width:700px}.exam-karyotype>div{text-align:center}.chromosome-pair{height:54px;display:flex;align-items:flex-end;justify-content:center;gap:5px}.chromosome-pair i{width:11px;height:44px;border-radius:8px;background:linear-gradient(90deg,#5c8e72,#9ac7aa,#4d8064)}.chromosome-pair i.short{height:27px}.exam-karyotype b{font-size:12px;color:#184936}
.exam-submit-zone{margin-top:24px;padding:20px;text-align:center;border:1px solid #cfe4d8;border-radius:17px;background:white}.exam-submit-zone .exam-primary-button{width:auto;min-width:230px}.exam-save-status{min-height:23px;margin-top:8px;color:#668076}
.exam-result-hero{overflow:hidden}.exam-result-heading{padding:27px;background:linear-gradient(135deg,#184936,#4f9b77);color:white}.exam-result-heading h2{margin:3px 0;font-size:32px}.exam-result-heading p{margin:3px 0}
.exam-score-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;padding:19px}.exam-score-grid article{padding:13px 9px;text-align:center;border:1px solid #cfe4d8;border-radius:13px;background:#fbfefc}.exam-score-grid strong,.exam-score-grid span{display:block}.exam-score-grid strong{font-size:23px;color:#184936}.exam-score-grid span{font-size:11px;color:#668076}
.exam-result-actions{display:flex;flex-wrap:wrap;gap:8px;padding:0 19px 20px}.exam-print-button{background:#275f4a;color:white}.exam-filter{padding:8px 13px;background:#eef9f2;color:#184936;font-size:13px}.exam-filter.active{background:#4f9b77;color:white}
.exam-review-title{margin:27px 0 13px;color:#184936}.exam-review-card{padding:21px;margin-bottom:16px}.exam-review-card.correct{border-left:7px solid #4d9a70}.exam-review-card.incorrect{border-left:7px solid #b64242}.exam-review-card.skipped{border-left:7px solid #a86b16}.exam-review-card.pending{border-left:7px solid #3b7286}
.exam-review-head{display:flex;justify-content:space-between;gap:13px}.exam-review-head span{color:#4f9b77;font-size:12px;font-weight:900}.exam-review-head h3{margin:4px 0 12px;font-size:17px}.exam-review-head>b{height:max-content;padding:5px 9px;border-radius:999px;background:#eef9f2;font-size:11px}
.exam-review-options>div{display:flex;justify-content:space-between;gap:10px;padding:9px 11px;margin:6px 0;border:1px solid #cfe4d8;border-radius:9px}.exam-review-options .correct-answer{border-color:#79c39a;background:#eefaf3}.exam-review-options .selected-wrong{border-color:#eaa1a1;background:#fff1f1}.exam-review-options small{font-weight:800}
.exam-student-answer,.exam-solution,.exam-rubric{margin-top:13px;padding:14px;border-radius:10px;white-space:pre-line}.exam-student-answer{background:#f7fbf8}.exam-solution{border-left:5px solid #4f9b77;background:#eef9f2}.exam-rubric{border-left:5px solid #3b7286;background:#eef7fa}.exam-student-answer p,.exam-solution p,.exam-rubric p{margin:5px 0 0}
.exam-result-note{color:#668076;font-size:13px}.exam-submit-overlay{display:none;position:fixed;inset:0;z-index:200;background:rgba(21,57,43,.84);color:white;place-items:center;text-align:center}.exam-submit-overlay.show{display:grid}.exam-submit-overlay>div{padding:30px;border-radius:20px;background:white;color:#20382f}
@media(max-width:820px){.exam-score-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:720px){.exam-brand-header{padding:14px}.exam-brand-mark{width:54px;height:54px}.exam-subject-chip{display:none}.exam-topbar{top:66px;grid-template-columns:1fr auto}.exam-topbar>#answeredDisplay{grid-column:1/-1}.exam-timer{min-width:105px;font-size:20px}.exam-score-grid{grid-template-columns:repeat(2,1fr)}.exam-review-head{display:block}}
@media print{.site-header,.site-footer,.exam-brand-header,.exam-result-actions{display:none!important}.own-exam-app{padding:0;background:white}.exam-app-container{width:100%}.exam-review-card{break-inside:avoid;box-shadow:none}}

/* ---------- Exam admin ---------- */
.admin-body{background:#f3eee7}.admin-page{padding:27px 0 65px}.admin-shell{display:grid;grid-template-columns:235px 1fr;gap:24px;align-items:start}
.admin-sidebar{position:sticky;top:96px;padding:22px;border:1px solid var(--line);border-radius:20px;background:#29231f;color:#eee5dc;box-shadow:var(--shadow)}.admin-logo{width:55px;height:55px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(135deg,var(--red),#c74245);font-size:1.3rem;font-weight:900}.admin-sidebar h2{margin:15px 0 3px}.admin-sidebar>p{margin:0;color:#bdb1a8;font-size:.76rem}.admin-sidebar nav{display:grid;gap:6px;margin:20px 0}.admin-sidebar nav a{padding:10px 11px;border-radius:10px;color:#d4c9c0;font-size:.82rem}.admin-sidebar nav a.active,.admin-sidebar nav a:hover{background:#463b35;color:white}.admin-storage-note{padding:12px;border:1px solid #4a403a;border-radius:11px;background:#332c28}.admin-storage-note strong,.admin-storage-note small{display:block}.admin-storage-note strong{font-size:.76rem}.admin-storage-note small{margin-top:4px;color:#a99e96;font-size:.65rem}
.admin-topbar{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:21px}.admin-topbar h1{font-size:clamp(2rem,3.5vw,3.2rem);margin:4px 0}.admin-topbar p{margin:0;color:var(--muted)}
.admin-lock{max-width:520px;margin:75px auto;padding:36px;text-align:center;border:1px solid var(--line);border-radius:21px;background:white;box-shadow:var(--shadow)}.lock-icon{width:70px;height:70px;margin:auto;display:grid;place-items:center;border-radius:50%;background:#f5e9e3;color:var(--red);font-size:2rem}.admin-lock h2{margin:17px 0 4px}.admin-lock p{color:var(--muted)}.admin-lock form{display:grid;grid-template-columns:1fr auto;gap:8px;margin:20px 0 9px}.admin-lock input{min-width:0;border:1px solid var(--line);border-radius:12px;padding:11px 13px}.form-error{min-height:22px;margin-top:6px;color:var(--red);font-size:.79rem}
.admin-editor-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(290px,.6fr);gap:19px}.admin-form-card,.admin-preview-card,.admin-list-card{padding:21px;border:1px solid var(--line);border-radius:19px;background:var(--surface);box-shadow:var(--shadow-sm)}.admin-card-head{display:flex;justify-content:space-between;align-items:start;gap:14px;margin-bottom:18px}.admin-card-head h2{margin:0;font-size:1.16rem}.admin-card-head p{margin:3px 0 0;color:var(--muted);font-size:.73rem}.small-link{border:0;background:none;color:var(--red);font-size:.76rem}
.drop-zone{min-height:195px;padding:25px;display:grid;place-items:center;text-align:center;border:2px dashed #cfbfae;border-radius:17px;background:linear-gradient(135deg,#faf6f0,#fff);outline:0;transition:.2s}.drop-zone.dragging,.drop-zone:focus{border-color:var(--red);background:#fff5f3}.drop-icon{width:57px;height:57px;display:grid;place-items:center;border-radius:50%;background:#f3e5dc;color:var(--red);font-weight:900}.drop-zone h3{margin:9px 0 2px}.drop-zone p{margin:0;color:var(--muted);font-size:.76rem}.drop-buttons{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:11px}
.admin-form-card>label,.admin-fields label{display:grid;gap:6px;margin-top:13px;color:#4d4641;font-size:.78rem;font-weight:600}.admin-form-card input,.admin-form-card textarea,.admin-form-card select{width:100%;padding:10px 11px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);outline:0}.admin-form-card input:focus,.admin-form-card textarea:focus,.admin-form-card select:focus{border-color:#c89b9d;box-shadow:0 0 0 3px rgba(157,23,27,.07)}
.admin-fields{display:grid;gap:11px}.admin-fields.two{grid-template-columns:2fr 1fr}.admin-fields.three{grid-template-columns:repeat(3,1fr)}.admin-fields.four{grid-template-columns:repeat(4,1fr)}
.cover-preview-row{display:flex;align-items:center;gap:11px;margin-top:10px;padding:9px;border-radius:11px;background:#f6f1eb;color:var(--muted);font-size:.72rem}.cover-preview-row img{width:82px;height:58px;border-radius:8px;object-fit:cover}
.question-builder{margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}.question-editor{margin:12px 0;padding:16px;border:1px solid var(--line);border-radius:14px;background:#faf7f2}.question-editor-actions{display:flex;gap:8px;margin-top:14px}
.admin-question-list{display:grid;gap:7px}.admin-question-row{display:grid;grid-template-columns:36px 1fr auto;gap:10px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:11px;background:white}.admin-question-number{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:#f2e8df;color:var(--red);font-weight:800}.admin-question-row strong,.admin-question-row small{display:block}.admin-question-row strong{font-size:.8rem}.admin-question-row small{margin-top:3px;color:var(--muted);font-size:.66rem}.admin-question-actions{display:flex;gap:4px}.admin-question-actions button{width:31px;height:31px;border:1px solid var(--line);border-radius:8px;background:white}.admin-question-actions .danger{color:var(--red)}
.admin-form-actions{display:flex;align-items:center;gap:13px;margin-top:19px}.admin-form-actions #adminSaveMessage{font-size:.76rem}.admin-form-actions #adminSaveMessage.success{color:var(--green)}.admin-form-actions #adminSaveMessage.error{color:var(--red)}
.admin-preview-card{position:sticky;top:95px;align-self:start}.exam-admin-preview .product-card{max-width:390px;margin:auto}.admin-list-card{margin-top:19px}.admin-count{padding:5px 9px;border-radius:999px;background:#f3ede6;color:#6c625a;font-size:.71rem}.admin-items{display:grid;gap:8px}
.exam-admin-row{display:grid;grid-template-columns:95px 1fr auto auto;gap:13px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:12px}.exam-admin-row>img{width:95px;height:70px;border-radius:8px;object-fit:cover}.exam-admin-row-copy h3{margin:0;font-size:.87rem}.exam-admin-row-copy p,.exam-admin-row-copy small{display:block;margin:2px 0 0;color:var(--muted);font-size:.68rem}.admin-status{padding:5px 8px;border-radius:999px;font-size:.65rem}.admin-status.published{background:#e9f5ec;color:var(--green)}.admin-status.draft{background:#f4ede2;color:#936c33}.exam-admin-row-actions{display:flex;gap:4px}.exam-admin-row-actions a,.exam-admin-row-actions button{width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:white}.exam-admin-row-actions .danger{color:var(--red)}.admin-empty{padding:40px;text-align:center;color:var(--muted)}.admin-empty.small{padding:25px}.admin-empty h3{margin:5px 0;color:var(--ink)}
@media(max-width:1160px){#examGrid{grid-template-columns:repeat(3,1fr)}.admin-shell{grid-template-columns:1fr}.admin-sidebar{position:static}.admin-sidebar nav{grid-template-columns:repeat(4,1fr)}.admin-editor-grid{grid-template-columns:1fr}.admin-preview-card{position:static}}
@media(max-width:900px){#examGrid{grid-template-columns:repeat(2,1fr)}.admin-fields.four{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){#examGrid{grid-template-columns:1fr}.admin-sidebar nav{grid-template-columns:1fr 1fr}.admin-topbar{align-items:start;flex-direction:column}.admin-lock form{grid-template-columns:1fr}.admin-fields.two,.admin-fields.three,.admin-fields.four{grid-template-columns:1fr}.admin-form-card,.admin-preview-card,.admin-list-card{padding:15px}.exam-admin-row{grid-template-columns:72px 1fr}.exam-admin-row>img{width:72px;height:60px}.admin-status,.exam-admin-row-actions{grid-column:2}.exam-admin-row-actions{flex-wrap:wrap}}


/* Cover uploader */
.cover-upload-section{
  margin-top:20px;
  padding:18px;
  border:1px solid var(--line);
  border-radius:16px;
  background:#faf7f2;
}
.cover-heading{margin-bottom:12px}
.cover-heading h2{font-size:1rem}
.cover-drop-zone{
  min-height:180px;
  display:grid;
  grid-template-columns:minmax(190px,40%) 1fr;
  align-items:center;
  gap:20px;
  padding:14px;
  border:2px dashed #cfbfae;
  border-radius:15px;
  background:white;
  cursor:pointer;
  outline:0;
  transition:.2s ease;
}
.cover-drop-zone:hover,
.cover-drop-zone:focus,
.cover-drop-zone.dragging{
  border-color:var(--red);
  background:#fff7f4;
  box-shadow:0 0 0 4px rgba(157,23,27,.06);
}
.cover-drop-zone.has-cover{
  border-style:solid;
  border-color:#a9c7b4;
  background:#f8fcf9;
}
.cover-drop-zone img{
  width:100%;
  height:150px;
  object-fit:cover;
  border-radius:11px;
  border:1px solid var(--line);
  background:#eee7df;
}
.cover-drop-copy{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:6px;
}
.cover-drop-copy strong{font-size:1rem;color:var(--ink)}
.cover-drop-copy span{color:var(--muted);font-size:.76rem}
.cover-drop-copy button{margin-top:7px}
.cover-drop-copy small{
  max-width:100%;
  margin-top:4px;
  color:#6d645d;
  overflow-wrap:anywhere;
}
@media(max-width:680px){
  .cover-drop-zone{grid-template-columns:1fr}
  .cover-drop-zone img{height:190px}
}

.exam-system-message[hidden],
#examApplication[hidden],
#introView[hidden],
#takingView[hidden],
#resultView[hidden],
#questionEditor[hidden],
#adminWorkspace[hidden],
#adminLock[hidden]{
  display:none !important;
}

.legacy-exam-redirect{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:24px;
  background:radial-gradient(circle at 15% 10%,rgba(169,216,191,.30),transparent 30%),#fbfdf8;
}
.legacy-redirect-card{
  width:min(520px,100%);
  padding:38px;
  border:1px solid #cfe4d8;
  border-radius:22px;
  background:white;
  box-shadow:0 16px 40px rgba(39,95,74,.12);
  text-align:center;
}
.legacy-redirect-card h1{margin:16px 0 5px;color:#184936}
.legacy-redirect-card p{margin:0 0 20px;color:#668076}


/* =========================================================
   V3 — Subject colour system, sorting, automatic written grade
   ========================================================= */

/* Library sorting */
.exam-library-head{
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:24px;
  margin:24px 0 18px;
}
.exam-library-head .section-title{margin-bottom:3px}
.exam-result-count{margin:0;color:var(--muted);font-size:.78rem}
.exam-sort-controls{display:flex;align-items:end;gap:10px;flex-wrap:wrap}
.exam-sort-controls label{
  display:grid;
  gap:5px;
  color:#665f59;
  font-size:.72rem;
  font-weight:600;
}
.exam-sort-controls select{
  min-width:170px;
  height:42px;
  padding:0 34px 0 12px;
  border:1px solid var(--line);
  border-radius:10px;
  background:white;
  color:var(--ink);
}
.exam-subject-filters{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
.exam-subject-filters .chip{white-space:nowrap}
.field-help{display:block;margin-top:5px;color:var(--muted);font-weight:400;line-height:1.55}

/* Subject themes: same BrainLab layout, different accents */
.exam-system-card,
.own-exam-app{
  --subject:#5b625f;
  --subject-dark:#353a38;
  --subject-soft:#f1f3f2;
  --subject-border:#d8ddda;
  --subject-second:#848d88;
}

.subject-theme-math,
.exam-theme-math{
  --subject:#a71418;
  --subject-dark:#781014;
  --subject-soft:#fff0ef;
  --subject-border:#edc8ca;
  --subject-second:#cf5a5d;
}
.subject-theme-science,
.exam-theme-science{
  --subject:#287257;
  --subject-dark:#184936;
  --subject-soft:#eaf7ef;
  --subject-border:#bfe0cd;
  --subject-second:#62a984;
}
.subject-theme-english,
.exam-theme-english{
  --subject:#245e98;
  --subject-dark:#173d65;
  --subject-soft:#edf5ff;
  --subject-border:#c5daf1;
  --subject-second:#6194c8;
}
.subject-theme-thai,
.exam-theme-thai{
  --subject:#a06a14;
  --subject-dark:#71480a;
  --subject-soft:#fff7e4;
  --subject-border:#ead39e;
  --subject-second:#c99a42;
}
.subject-theme-social,
.exam-theme-social{
  --subject:#75539a;
  --subject-dark:#4b3564;
  --subject-soft:#f5effb;
  --subject-border:#d9cae9;
  --subject-second:#9a7ab8;
}
.subject-theme-onet,
.exam-theme-onet{
  --subject:#2f456d;
  --subject-dark:#1d2b46;
  --subject-soft:#eef2f8;
  --subject-border:#c8d1e0;
  --subject-second:#64799f;
}
.subject-theme-entrance,
.exam-theme-entrance{
  --subject:#9b5424;
  --subject-dark:#6c3512;
  --subject-soft:#fff2e8;
  --subject-border:#eccbb3;
  --subject-second:#c87b48;
}

.exam-system-card .online-badge{background:var(--subject)}
.exam-system-card .exam-card-meta span{
  background:var(--subject-soft);
  color:var(--subject-dark);
  border:1px solid var(--subject-border);
}
.exam-system-card .start-exam-button{
  background:linear-gradient(135deg,var(--subject-dark),var(--subject));
  box-shadow:0 9px 24px color-mix(in srgb,var(--subject) 24%,transparent);
}
.exam-system-card .start-exam-button:hover{
  background:linear-gradient(135deg,var(--subject),var(--subject-second));
}

/* Apply the active subject palette to the exam-taking interface */
.own-exam-app[class*="exam-theme-"]{
  background:
    radial-gradient(circle at 8% 0%,color-mix(in srgb,var(--subject-soft) 84%,transparent),transparent 30%),
    radial-gradient(circle at 94% 10%,color-mix(in srgb,var(--subject-border) 55%,transparent),transparent 30%),
    #fbfdfb;
}
.own-exam-app[class*="exam-theme-"] .exam-brand-header{
  border-color:var(--subject-border);
  background:linear-gradient(135deg,var(--subject-soft),color-mix(in srgb,var(--subject-soft) 56%,white),color-mix(in srgb,var(--subject-border) 72%,white));
}
.own-exam-app[class*="exam-theme-"] .exam-brand-mark,
.own-exam-app[class*="exam-theme-"] .exam-brand-name,
.own-exam-app[class*="exam-theme-"] .exam-subject-chip,
.own-exam-app[class*="exam-theme-"] .exam-intro-hero h1,
.own-exam-app[class*="exam-theme-"] .exam-review-title{
  color:var(--subject-dark);
}
.own-exam-app[class*="exam-theme-"] .exam-brand-mark,
.own-exam-app[class*="exam-theme-"] .exam-subject-chip,
.own-exam-app[class*="exam-theme-"] .exam-intro-card,
.own-exam-app[class*="exam-theme-"] .exam-start-card,
.own-exam-app[class*="exam-theme-"] .exam-question-card,
.own-exam-app[class*="exam-theme-"] .exam-result-hero,
.own-exam-app[class*="exam-theme-"] .exam-review-card,
.own-exam-app[class*="exam-theme-"] .exam-topbar{
  border-color:var(--subject-border);
}
.own-exam-app[class*="exam-theme-"] .exam-intro-hero{border-top-color:var(--subject)}
.own-exam-app[class*="exam-theme-"] .exam-tag,
.own-exam-app[class*="exam-theme-"] .exam-stat-chips span,
.own-exam-app[class*="exam-theme-"] .exam-topic,
.own-exam-app[class*="exam-theme-"] .exam-point,
.own-exam-app[class*="exam-theme-"] .exam-filter{
  background:var(--subject-soft);
  color:var(--subject-dark);
  border-color:var(--subject-border);
}
.own-exam-app[class*="exam-theme-"] .exam-primary-button,
.own-exam-app[class*="exam-theme-"] .exam-print-button,
.own-exam-app[class*="exam-theme-"] .exam-filter.active,
.own-exam-app[class*="exam-theme-"] .exam-timer,
.own-exam-app[class*="exam-theme-"] .exam-mini-mark{
  background:var(--subject);
  color:white;
}
.own-exam-app[class*="exam-theme-"] .exam-result-heading{
  background:linear-gradient(135deg,var(--subject-dark),var(--subject));
}
.own-exam-app[class*="exam-theme-"] .exam-section-banner{
  border-color:var(--subject-border);
  background:linear-gradient(135deg,var(--subject-soft),white);
  color:var(--subject-dark);
}
.own-exam-app[class*="exam-theme-"] .exam-choice:hover,
.own-exam-app[class*="exam-theme-"] .exam-solution{
  border-color:var(--subject-border);
  background:var(--subject-soft);
}
.own-exam-app[class*="exam-theme-"] input[type="radio"]{accent-color:var(--subject)}

/* Fully automatic written-answer grading */
.exam-review-card.partial{border-left:7px solid #c38a28}
.exam-review-card.partial .exam-review-head>b{background:#fff5de;color:#805914}
.exam-auto-grade{
  margin-top:13px;
  padding:14px;
  border-left:5px solid var(--subject);
  border-radius:10px;
  background:var(--subject-soft);
}
.exam-auto-grade p{margin:5px 0}
.matched-keywords{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.matched-keywords span{
  padding:5px 8px;
  border:1px solid var(--subject-border);
  border-radius:999px;
  background:white;
  color:var(--subject-dark);
  font-size:.72rem;
}
#keywordsLabel textarea{font-family:inherit}

@media(max-width:760px){
  .exam-library-head{align-items:stretch;flex-direction:column}
  .exam-sort-controls{display:grid;grid-template-columns:1fr 1fr}
  .exam-sort-controls select{width:100%;min-width:0}
}
@media(max-width:520px){
  .exam-sort-controls{grid-template-columns:1fr}
}


/* =========================================================
   V4 — Summary lesson pages before the exam
   ========================================================= */
.lesson-view{padding-bottom:26px}
.lesson-page-shell{
  padding:0 0 18px;
  border:1px solid var(--subject-border,#cfe4d8);
  border-top:8px solid var(--subject,#287257);
  border-radius:22px;
  background:white;
  box-shadow:0 12px 34px rgba(23,55,43,.10);
  overflow:hidden;
}
.lesson-page-meta{
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:18px;
  padding:22px 28px 13px;
}
.lesson-page-meta>div{display:grid;gap:3px}
.lesson-course-label{
  color:var(--subject,#287257);
  font-size:.72rem;
  font-weight:900;
  letter-spacing:.12em;
}
.lesson-page-meta strong{font-size:.88rem;color:var(--subject-dark,#184936)}
.lesson-page-meta>span{color:color-mix(in srgb,var(--subject,#287257) 55%,white);font-weight:800}
.lesson-progress-track{height:7px;background:var(--subject-soft,#eaf7ef)}
.lesson-progress-track span{
  display:block;
  width:10%;
  height:100%;
  background:linear-gradient(90deg,var(--subject-dark,#184936),var(--subject,#287257),var(--subject-second,#62a984));
  transition:width .25s ease;
}
.lesson-content-card{padding:37px 37px 30px}
.lesson-title-block{padding-bottom:23px;border-bottom:1px solid var(--subject-border,#cfe4d8)}
.lesson-title-block h1{
  margin:13px 0 7px;
  color:var(--subject-dark,#184936);
  font-size:clamp(2rem,5vw,3.55rem);
  line-height:1.15;
}
.lesson-title-block p{margin:0;color:#74827d;font-size:1rem}
.lesson-intro{
  margin:23px 0;
  padding:15px 18px;
  border-left:5px solid var(--subject,#287257);
  border-radius:10px;
  background:var(--subject-soft,#eaf7ef);
  color:#43534d;
  line-height:1.75;
}
.lesson-intro p{margin:0}
.lesson-formula-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:15px;
  margin-top:22px;
}
.lesson-formula-card{
  min-height:150px;
  padding:18px;
  border:1px solid var(--subject-border,#cfe4d8);
  border-radius:15px;
  background:linear-gradient(145deg,#fff,var(--subject-soft,#eaf7ef));
}
.lesson-formula-card span{
  display:block;
  margin-bottom:11px;
  color:var(--subject,#287257);
  font-size:.75rem;
  font-weight:900;
}
.lesson-formula-card strong{
  display:block;
  color:var(--subject-dark,#184936);
  font-family:"Consolas","Courier New",monospace;
  font-size:1.15rem;
  line-height:1.55;
  white-space:pre-wrap;
}
.lesson-formula-card p{margin:10px 0 0;color:#68766f;font-size:.8rem;line-height:1.55}
.lesson-example,.lesson-tips{
  margin-top:20px;
  padding:19px 21px;
  border-radius:15px;
}
.lesson-example{
  border:1px solid var(--subject-border,#cfe4d8);
  background:#fbfdfc;
}
.lesson-tips{
  border-left:6px solid var(--subject,#287257);
  background:var(--subject-soft,#eaf7ef);
}
.lesson-box-label{
  color:var(--subject,#287257);
  font-size:.73rem;
  font-weight:900;
  letter-spacing:.08em;
}
.lesson-example h3{margin:6px 0 10px;color:var(--subject-dark,#184936)}
.lesson-example>div{color:#526159;line-height:1.75;white-space:pre-line}
.lesson-example-answer{
  display:inline-block;
  margin-top:13px;
  padding:7px 11px;
  border-radius:999px;
  background:var(--subject,#287257);
  color:white;
}
.lesson-tips ul{margin:10px 0 0;padding-left:21px}
.lesson-tips li{margin:7px 0;color:#43534d}
.lesson-ready-panel{
  margin:0 37px 24px;
  padding:24px;
  text-align:center;
  border:1px solid var(--subject-border,#cfe4d8);
  border-radius:17px;
  background:linear-gradient(135deg,var(--subject-soft,#eaf7ef),white);
}
.lesson-ready-panel h2{margin:0 0 5px;color:var(--subject-dark,#184936);font-size:1.65rem}
.lesson-ready-panel p{margin:0;color:#66746e}
.lesson-navigation{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  padding:18px 28px 4px;
}
.lesson-navigation>div{display:flex;gap:9px}
.lesson-skip-button{
  border:0;
  background:none;
  color:color-mix(in srgb,var(--subject,#287257) 58%,white);
  font:inherit;
  font-weight:700;
  cursor:pointer;
}
.lesson-skip-button:hover{color:var(--subject,#287257)}
.lesson-navigation .btn-primary{background:var(--subject,#287257);border-color:var(--subject,#287257)}
.registration-heading{display:flex;justify-content:space-between;align-items:start;gap:15px}
.registration-heading h2{margin:3px 0 0}

/* Admin lesson builder */
.lesson-builder{
  margin-top:22px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.lesson-editor{background:#f8fbf9}
.lesson-admin-row .admin-question-number{
  background:#e8f4ed;
  color:#287257;
}

@media(max-width:900px){
  .lesson-formula-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  .lesson-page-meta,.lesson-content-card{padding-left:18px;padding-right:18px}
  .lesson-page-meta{align-items:start}
  .lesson-formula-grid{grid-template-columns:1fr}
  .lesson-ready-panel{margin-left:18px;margin-right:18px}
  .lesson-navigation{align-items:stretch;flex-direction:column-reverse;padding-left:18px;padding-right:18px}
  .lesson-navigation>div{display:grid;grid-template-columns:1fr 1.5fr;width:100%}
  .lesson-navigation .btn{width:100%}
  .lesson-skip-button{padding:10px}
}


/* V4.1 — Mathematical typography */
sup,sub{
  position:relative;
  vertical-align:baseline;
  font-size:.7em;
  line-height:0;
}
sup{top:-.55em}
sub{bottom:-.18em}

.lesson-formula-card strong sup,
.lesson-formula-card strong sub{
  font-size:.68em;
}
.lesson-formula-card strong{
  letter-spacing:.01em;
}
.exam-question-head h3 sup,
.exam-choice sup,
.exam-review-card sup,
.lesson-content-card sup{
  font-family:inherit;
}
.exam-question-head h3,
.exam-choice span,
.exam-review-card,
.lesson-content-card{
  font-variant-numeric:lining-nums;
}

/* V4.2 — Admin login reliability */
#adminLoginButton:disabled{
  opacity:.65;
  cursor:wait;
}
#pinError{
  font-weight:700;
}

/* V4.3 — inline admin login */
.admin-version-badge{
  display:inline-block;
  margin-top:14px;
  padding:5px 10px;
  border-radius:999px;
  background:#efe5dc;
  color:#8f161b;
  font-size:.72rem;
  font-weight:900;
  letter-spacing:.08em;
}
html[data-admin-unlocked="yes"] #adminLock{
  display:none !important;
}
html[data-admin-unlocked="yes"] #adminWorkspace{
  display:block !important;
}


/* V4.4 — Reliable native file upload */
.upload-label{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.native-file-input{
  display:block;
  width:min(100%,520px);
  margin:12px auto 0;
  padding:9px;
  border:1px solid #d8cbc0;
  border-radius:10px;
  background:#fff;
  color:#514a45;
  font:inherit;
  font-size:.76rem;
}
.native-file-input::file-selector-button{
  margin-right:10px;
  padding:8px 12px;
  border:0;
  border-radius:8px;
  background:#9d171b;
  color:#fff;
  font:inherit;
  font-weight:800;
  cursor:pointer;
}
.cover-native-input{
  width:100%;
  margin-top:10px;
}
.upload-file-name{
  display:block;
  margin-top:8px;
  color:#72675f;
}
.upload-file-name.success{
  color:#267451;
  font-weight:800;
}
.upload-warning{
  display:block;
  margin-top:6px;
  color:#a34232;
  font-weight:700;
}


/* V5.1 — Subject and grade filters */
.exam-filter-controls{
  display:grid;
  grid-template-columns:minmax(145px,1fr) minmax(145px,1fr) minmax(170px,1.15fr) auto;
  align-items:end;
  gap:10px;
}
.exam-filter-controls label{
  min-width:0;
}
.exam-clear-filter-button{
  min-height:42px;
  white-space:nowrap;
}
@media(max-width:900px){
  .exam-filter-controls{
    grid-template-columns:1fr 1fr;
    width:100%;
  }
}
@media(max-width:560px){
  .exam-filter-controls{
    grid-template-columns:1fr;
  }
  .exam-clear-filter-button{
    width:100%;
  }
}


/* =========================================================
   V5.2 — Full live catalog filters
   ========================================================= */
.filter-panel .check-row{
  padding:5px 7px;
  border-radius:8px;
  cursor:pointer;
  transition:background .15s ease,color .15s ease;
}
.filter-panel .check-row:hover{
  background:#fff5f3;
  color:var(--red);
}
.filter-panel .check-row:has(input:checked){
  background:#fff0ef;
  color:#8f1217;
  font-weight:800;
}
.filter-panel .check-row input{
  flex:0 0 auto;
  cursor:pointer;
}
.active-filter-summary{
  display:block;
  margin-top:4px;
  color:var(--muted);
  font-size:.72rem;
}
.catalog-card-meta{
  display:flex;
  flex-wrap:wrap;
  gap:5px;
  margin-bottom:8px;
}
.catalog-card-meta span{
  padding:4px 7px;
  border:1px solid #eadfd5;
  border-radius:999px;
  background:#faf6f2;
  color:#6c625b;
  font-size:.62rem;
  font-weight:800;
}
.catalog-empty-state,
.exam-library-empty{
  grid-column:1/-1;
  min-height:260px;
  display:grid;
  place-items:center;
  align-content:center;
  gap:7px;
  padding:30px;
  text-align:center;
  border:2px dashed var(--line);
  border-radius:18px;
  background:#fff;
}
.catalog-empty-state h3,
.exam-library-empty h3{margin:0}
.catalog-empty-state p,
.exam-library-empty p{margin:0 0 8px;color:var(--muted)}
.exam-catalog-layout{grid-template-columns:280px 1fr}
.exam-catalog-toolbar{align-items:flex-end}
.compact-title{margin:4px 0 4px;font-size:1.65rem}
.exam-catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.exam-info-strip{
  margin-top:22px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
}
.exam-info-strip .info-point{
  padding:13px;
  border:1px solid var(--line);
  border-radius:13px;
  background:#fff;
}
#examGradeCheckboxes,
#examSubjectCheckboxes{
  max-height:210px;
  overflow:auto;
  padding-right:3px;
}
.range-row input{
  min-width:0;
}
@media(max-width:1120px){
  .exam-catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:820px){
  .exam-catalog-layout{grid-template-columns:1fr}
  .exam-filter-panel{position:static}
  .exam-info-strip{grid-template-columns:1fr}
}
@media(max-width:560px){
  .exam-catalog-grid{grid-template-columns:1fr}
  .exam-catalog-toolbar{align-items:flex-start;flex-direction:column}
}


/* =========================================================
   V6.1 — Student history and learning charts
   ========================================================= */
.student-history-area{
  margin-top:34px;
}
.student-history-toggle-card{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  padding:24px 26px;
  border:1px solid #cbdde9;
  border-radius:22px;
  background:
    radial-gradient(circle at top right,rgba(58,130,177,.14),transparent 34%),
    linear-gradient(135deg,#f7fbfe,#eef6fb);
  box-shadow:0 14px 34px rgba(32,77,108,.09);
}
.student-history-kicker,
.student-history-heading span,
.subject-learning-head>div>span{
  display:block;
  margin-bottom:5px;
  color:#2d6f9b;
  font-size:.68rem;
  font-weight:900;
  letter-spacing:.12em;
}
.student-history-toggle-card h2{
  margin:0 0 7px;
  color:#153e5f;
  font-size:1.28rem;
}
.student-history-toggle-card p{
  max-width:720px;
  margin:0;
  color:#60778a;
  font-size:.79rem;
  line-height:1.7;
}
.student-history-toggle-button{
  flex:0 0 auto;
  min-width:230px;
  padding:13px 18px;
  border:0;
  border-radius:13px;
  background:#174f77;
  color:#fff;
  font:inherit;
  font-weight:900;
  cursor:pointer;
  box-shadow:0 8px 18px rgba(23,79,119,.2);
  transition:transform .18s ease,box-shadow .18s ease;
}
.student-history-toggle-button:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 24px rgba(23,79,119,.26);
}
.student-history-panel{
  margin-top:16px;
  padding:24px;
  border:1px solid #d8e4ec;
  border-radius:22px;
  background:#f8fbfd;
}
.student-history-status{
  margin-bottom:14px;
  padding:11px 14px;
  border-radius:11px;
  background:#eaf4fa;
  color:#315e7b;
  font-size:.76rem;
  font-weight:800;
}
.student-history-metrics{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:10px;
  margin-bottom:25px;
}
.student-history-metrics article{
  min-width:0;
  padding:15px;
  border:1px solid #dce7ee;
  border-radius:15px;
  background:#fff;
}
.student-history-metrics strong{
  display:block;
  overflow:hidden;
  color:#174f77;
  font-size:1.08rem;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.student-history-metrics span{
  display:block;
  margin-top:4px;
  color:#718392;
  font-size:.65rem;
}
.student-history-heading{
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:20px;
  margin:7px 0 14px;
}
.student-history-heading h3{
  margin:0;
  color:#173f5e;
  font-size:1.14rem;
}
.student-history-heading p{
  max-width:620px;
  margin:0;
  color:#718391;
  font-size:.7rem;
  line-height:1.6;
  text-align:right;
}
.student-subject-analytics{
  display:grid;
  gap:14px;
}
.subject-learning-card{
  padding:19px;
  border:1px solid #d9e5ec;
  border-radius:18px;
  background:#fff;
  box-shadow:0 8px 22px rgba(37,77,103,.055);
}
.subject-learning-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  margin-bottom:15px;
}
.subject-learning-head h3{
  margin:0;
  color:#173f5e;
  font-size:1.12rem;
}
.subject-average{
  min-width:132px;
  padding:9px 12px;
  border-radius:12px;
  text-align:right;
}
.subject-average strong,
.subject-average span{
  display:block;
}
.subject-average strong{
  font-size:1.05rem;
}
.subject-average span{
  margin-top:2px;
  font-size:.6rem;
}
.subject-average.high{
  background:#e8f6ef;
  color:#276c4c;
}
.subject-average.medium{
  background:#fff2d8;
  color:#856016;
}
.subject-average.low{
  background:#ffe9e8;
  color:#a32a2f;
}
.subject-learning-charts{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.learning-donut-card{
  padding:16px;
  border:1px solid #e1eaf0;
  border-radius:15px;
  background:#fbfdfe;
}
.learning-donut-card-head span{
  color:#718493;
  font-size:.62rem;
}
.learning-donut-card-head h4{
  margin:2px 0 13px;
  color:#234d69;
  font-size:.92rem;
}
.learning-donut-layout{
  display:grid;
  grid-template-columns:148px minmax(0,1fr);
  gap:16px;
  align-items:center;
}
.learning-donut{
  width:148px;
  aspect-ratio:1;
  display:grid;
  place-items:center;
  border-radius:50%;
  box-shadow:inset 0 0 0 1px rgba(23,67,96,.08);
}
.learning-donut>div{
  width:82px;
  aspect-ratio:1;
  display:grid;
  place-items:center;
  align-content:center;
  border-radius:50%;
  background:#fff;
  box-shadow:0 5px 15px rgba(35,72,97,.11);
  text-align:center;
}
.learning-donut strong{
  color:#174f77;
  font-size:1.05rem;
}
.learning-donut span{
  color:#7a8d9a;
  font-size:.54rem;
}
.learning-chart-legend{
  display:grid;
  gap:7px;
}
.learning-chart-legend-row{
  display:grid;
  grid-template-columns:10px minmax(0,1fr) 37px;
  gap:7px;
  align-items:center;
  color:#536b7b;
  font-size:.64rem;
}
.learning-chart-legend-row>span:nth-child(2){
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.learning-chart-legend-row strong{
  color:#244f6c;
  text-align:right;
}
.learning-chart-dot{
  width:9px;
  height:9px;
  border-radius:50%;
}
.learning-chart-empty{
  padding:18px 10px;
  color:#7c8e9a;
  font-size:.68rem;
  line-height:1.55;
  text-align:center;
}
.history-list-heading{
  margin-top:28px;
}
.student-history-list{
  display:grid;
  gap:12px;
}
.student-history-record{
  padding:19px;
  border:1px solid #dce6ec;
  border-radius:17px;
  background:#fff;
}
.student-history-record-top{
  display:flex;
  justify-content:space-between;
  gap:18px;
  align-items:flex-start;
}
.student-history-record-tags{
  display:flex;
  flex-wrap:wrap;
  gap:5px;
  margin-bottom:7px;
}
.student-history-record-tags span{
  padding:4px 7px;
  border-radius:999px;
  background:#edf5fa;
  color:#2f678b;
  font-size:.6rem;
  font-weight:800;
}
.student-history-record h3{
  margin:0 0 5px;
  color:#173f5e;
  font-size:.96rem;
}
.student-history-record p{
  margin:0;
  color:#7a8b97;
  font-size:.66rem;
}
.student-history-score{
  flex:0 0 auto;
  min-width:104px;
  padding:10px 12px;
  border-radius:13px;
  text-align:center;
}
.student-history-score strong,
.student-history-score span{
  display:block;
}
.student-history-score strong{
  font-size:.92rem;
}
.student-history-score span{
  margin-top:2px;
  font-size:.65rem;
}
.student-history-score.high{
  background:#e8f6ef;
  color:#276c4c;
}
.student-history-score.medium{
  background:#fff2d8;
  color:#856016;
}
.student-history-score.low{
  background:#ffe9e8;
  color:#a32a2f;
}
.student-history-section-scores{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:7px;
  margin-top:14px;
}
.student-history-section-scores>div{
  display:flex;
  justify-content:space-between;
  gap:8px;
  min-width:0;
  padding:8px 9px;
  border-radius:10px;
  background:#f5f8fa;
  color:#627784;
  font-size:.61rem;
}
.student-history-section-scores span{
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.student-history-section-scores strong{
  flex:0 0 auto;
  color:#315d78;
}
.student-history-insights{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:11px;
  margin-top:12px;
}
.student-history-insights section{
  padding:11px;
  border:1px solid #e4ebef;
  border-radius:11px;
}
.student-history-insights h4{
  margin:0 0 7px;
  color:#405d70;
  font-size:.68rem;
}
.student-insight-tags{
  display:flex;
  flex-wrap:wrap;
  gap:5px;
}
.student-insight-tags span{
  padding:4px 7px;
  border-radius:7px;
  font-size:.58rem;
}
.student-insight-tags.strength span{
  background:#e9f6ef;
  color:#286a4c;
}
.student-insight-tags.gap span{
  background:#ffeaea;
  color:#9f292e;
}
.student-history-empty{
  padding:35px;
  border:2px dashed #d4e1e8;
  border-radius:15px;
  color:#748793;
  text-align:center;
}
@media(max-width:980px){
  .student-history-metrics{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .student-history-section-scores{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
@media(max-width:760px){
  .student-history-toggle-card,
  .student-history-heading,
  .subject-learning-head{
    align-items:flex-start;
    flex-direction:column;
  }
  .student-history-toggle-button{
    width:100%;
    min-width:0;
  }
  .student-history-heading p{
    max-width:none;
    text-align:left;
  }
  .subject-learning-charts,
  .student-history-insights{
    grid-template-columns:1fr;
  }
}
@media(max-width:560px){
  .student-history-panel{
    padding:15px;
  }
  .student-history-metrics{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .learning-donut-layout{
    grid-template-columns:1fr;
    justify-items:center;
  }
  .learning-chart-legend{
    width:100%;
  }
  .student-history-record-top{
    flex-direction:column;
  }
  .student-history-score{
    width:100%;
  }
  .student-history-section-scores{
    grid-template-columns:1fr;
  }
}
@media print{
  .student-history-toggle-card{
    display:none!important;
  }
  .student-history-panel[hidden]{
    display:none!important;
  }
}

.exam-online-warning{
  max-width:1180px;
  margin:0 auto 16px;
  padding:12px 15px;
  border:1px solid #e0b55b;
  border-radius:12px;
  background:#fff6d8;
  color:#6f5519;
  font-size:.78rem;
  line-height:1.6;
}

.exam-library-loading{
  grid-column:1/-1;
  min-height:220px;
  display:grid;
  place-items:center;
  align-content:center;
  gap:10px;
  padding:28px;
  border:1px solid #e6d9ce;
  border-radius:24px;
  background:#fffdfa;
  color:#594f49;
  text-align:center;
}
.exam-library-loading strong,
.exam-library-loading small{display:block}
.exam-library-loading small{color:#8a7c72}
.exam-loading-spinner{
  width:38px;
  height:38px;
  border:4px solid #eadfd6;
  border-top-color:#a9161d;
  border-radius:50%;
  animation:brainlab-spin .8s linear infinite;
}
@keyframes brainlab-spin{to{transform:rotate(360deg)}}


/* ===== BrainLab STEM V8 Membership ===== */
.member-nav-slot{display:flex;align-items:center;gap:6px}
.member-nav-link{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink)}
.member-nav-avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font-weight:900}
.member-nav-copy{display:flex;flex-direction:column;line-height:1.1}
.member-nav-copy strong{font-size:.76rem}.member-nav-copy small{font-size:.58rem;color:var(--muted);margin-top:3px}
.member-logout-mini{border:0;background:transparent;color:var(--muted);font-weight:800;cursor:pointer;font-size:.62rem}

.member-grade-recommendation{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:13px;border:1px solid #dccfc5;border-radius:14px;background:#fffaf6;margin-bottom:16px}
.member-grade-recommendation strong,.member-grade-recommendation span{display:block}
.member-grade-recommendation strong{font-size:.74rem;color:var(--red)}
.member-grade-recommendation span{font-size:.62rem;color:var(--muted);margin-top:3px;line-height:1.5}
.filter-help{font-size:.64rem;color:var(--muted);line-height:1.5;margin:0 0 10px}
.grade-accordion{display:grid;gap:7px}
.grade-accordion-item{border:1px solid #e4d9d0;border-radius:13px;overflow:hidden;background:#fff}
.grade-accordion-toggle{width:100%;border:0;background:#fff;padding:13px 14px;display:flex;justify-content:space-between;align-items:center;font:inherit;font-weight:900;text-align:left;cursor:pointer;color:#312b27}
.grade-accordion-item.open .grade-accordion-toggle{background:#f1ebe6;color:#9f171c}
.grade-accordion-meta{display:flex;align-items:center;gap:8px;font-size:.6rem;color:#84776e}
.grade-accordion-panel{padding:10px;background:#fff}
.grade-choice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin-top:8px}
.grade-choice{border:1px solid #ddd1c8;border-radius:10px;background:#fff;padding:9px 8px;font:inherit;font-size:.66rem;font-weight:800;cursor:pointer;color:#5f554e;display:flex;align-items:center;justify-content:space-between;gap:5px}
.grade-choice.all{width:100%;justify-content:center}
.grade-choice small{font-size:.55rem;color:#9b8c81}
.grade-choice.active,.grade-subject-chip.active{border-color:#a5161d;background:#a5161d;color:#fff}
.grade-choice.active small{color:#fff}
.grade-choice:disabled{opacity:.35;cursor:not-allowed}
.grade-subject-block{border-top:1px solid #eee5de;margin-top:11px;padding-top:10px}
.grade-subject-block>strong{font-size:.63rem;color:#695e57}
.grade-subject-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.grade-subject-chip{border:1px solid #ddd1c8;border-radius:999px;background:#fff;padding:7px 10px;font:inherit;font-size:.6rem;font-weight:800;cursor:pointer}

/* Authentication pages */
.auth-page main{min-height:calc(100vh - 80px)}
.auth-shell{max-width:1120px;margin:45px auto;padding:0 22px;display:grid;grid-template-columns:.9fr 1.1fr;gap:0;align-items:stretch}
.auth-visual{padding:55px 45px;border-radius:28px 0 0 28px;background:linear-gradient(145deg,#9c171d,#cf3940);color:#fff;display:flex;flex-direction:column;justify-content:center;min-height:620px}
.auth-visual>span,.member-hero>div>span,.member-panel-head>span{font-size:.66rem;font-weight:900;letter-spacing:.12em}
.auth-visual h1{font-size:3rem;line-height:1.12;margin:12px 0 18px}
.auth-visual p{line-height:1.75;color:#ffe7e7}
.auth-feature-list{display:grid;gap:12px;margin-top:28px;font-weight:800}
.auth-card{background:#fff;border:1px solid #e5d9d0;border-radius:0 28px 28px 0;padding:48px;box-shadow:0 18px 50px rgba(67,35,23,.1)}
.auth-card-heading>span{font-size:.66rem;font-weight:900;letter-spacing:.12em;color:var(--red)}
.auth-card-heading h2{font-size:2rem;margin:8px 0}.auth-card-heading p{color:var(--muted)}
.auth-form{display:grid;gap:14px;margin-top:25px}
.auth-form-grid{grid-template-columns:1fr 1fr}
.auth-form .wide{grid-column:1/-1}
.auth-form label{display:grid;gap:7px;font-size:.72rem;font-weight:800;color:#4d443e}
.auth-form input,.auth-form select{width:100%;padding:13px 14px;border:1px solid #d9cec6;border-radius:12px;background:#fff;font:inherit;font-size:.76rem}
.auth-form input:focus,.auth-form select:focus{outline:2px solid #f0c8ca;border-color:#b3242a}
.auth-submit{margin-top:5px}
.auth-message{min-height:22px;font-size:.68rem;line-height:1.5}
.auth-message.error{color:#b4232a}.auth-message.success{color:#207047}
.auth-switch{text-align:center;color:var(--muted);font-size:.72rem;margin-top:22px}.auth-switch a{color:var(--red);font-weight:900}
.auth-consent{grid-template-columns:auto 1fr!important;align-items:start}.auth-consent input{width:18px;height:18px;margin:1px 0 0}
.auth-form hr{border:0;border-top:1px solid #eee3db;width:100%;margin:5px 0}.auth-form h3{margin:0;font-size:.9rem}

/* Member dashboard */
.member-page main{background:#f7f3ef;padding:35px 0 70px;min-height:70vh}
.member-guest-gate{min-height:520px;display:grid;place-items:center;text-align:center}.member-guest-gate>div{background:#fff;padding:45px;border-radius:25px;border:1px solid #e3d7ce}.member-guest-gate span{color:var(--red);font-size:.66rem;font-weight:900}
.member-guest-gate h1{margin:10px 0}.member-guest-gate p{color:var(--muted)}.member-guest-gate .btn{margin:12px 4px 0}
.member-hero{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;background:linear-gradient(135deg,#241f1d,#4c3331);color:#fff;padding:28px;border-radius:25px}
.member-avatar-large{width:78px;height:78px;border-radius:24px;display:grid;place-items:center;background:#c4262d;font-size:2rem;font-weight:900}
.member-hero h1{margin:4px 0}.member-hero p{margin:0;color:#eadfdb}
.member-identity-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:16px 0}
.member-identity-grid article{background:#fff;border:1px solid #e4d8cf;border-radius:17px;padding:16px}
.member-identity-grid span,.member-identity-grid strong{display:block}.member-identity-grid span{font-size:.62rem;color:var(--muted)}.member-identity-grid strong{margin-top:6px;font-size:.82rem;overflow-wrap:anywhere}
.member-content-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:16px}
.member-panel{background:#fff;border:1px solid #e4d8cf;border-radius:22px;padding:22px}
.member-panel-head h2{margin:5px 0 0}.member-panel-head>span{color:var(--red)}
.member-attempt-list{display:grid;gap:10px;margin-top:16px}
.member-attempt-card{display:grid;grid-template-columns:1fr auto auto;gap:13px;align-items:center;padding:15px;border:1px solid #e6dcd4;border-radius:15px}
.member-attempt-card>div>span{font-size:.58rem;color:var(--red);font-weight:900}.member-attempt-card h3{font-size:.8rem;margin:4px 0}.member-attempt-card p{font-size:.61rem;color:var(--muted);margin:0}
.member-attempt-score{text-align:right}.member-attempt-score strong,.member-attempt-score small{display:block}.member-attempt-score strong{font-size:1.15rem;color:var(--red)}.member-attempt-score small{font-size:.58rem;color:var(--muted)}
.member-empty{padding:35px;text-align:center;border:1px dashed #decfc5;border-radius:14px;color:var(--muted)}.member-empty strong,.member-empty span{display:block}.member-empty span{font-size:.68rem;margin-top:5px}

/* Exam member gate */
.exam-member-status{display:flex;align-items:center;gap:11px;padding:13px;border-radius:14px;margin-bottom:14px}
.exam-member-status.logged-in{background:#eef8f2;border:1px solid #b8dbc7}
.exam-member-status.login-required{background:#fff4e3;border:1px solid #e7c888;justify-content:space-between}
.exam-member-status strong,.exam-member-status small{display:block}.exam-member-status strong{font-size:.74rem}.exam-member-status small{font-size:.62rem;color:#667069;margin-top:3px}
.exam-member-avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#24704a;color:#fff;font-weight:900}
#legacyStudentFields{display:grid;gap:14px}#legacyStudentFields input[readonly]{background:#f2f5f3;color:#58605c}

@media(max-width:900px){
  .auth-shell{grid-template-columns:1fr;margin:18px auto;padding:0 14px}.auth-visual{border-radius:24px 24px 0 0;min-height:auto;padding:34px 28px}.auth-visual h1{font-size:2.25rem}.auth-card{border-radius:0 0 24px 24px;padding:28px 22px}
  .member-identity-grid{grid-template-columns:repeat(2,1fr)}.member-content-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .member-nav-copy,.member-logout-mini{display:none}
  .grade-choice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .member-grade-recommendation{align-items:flex-start;flex-direction:column}
  .auth-form-grid{grid-template-columns:1fr}.auth-form .wide{grid-column:auto}
  .member-hero{grid-template-columns:auto 1fr}.member-hero>button{grid-column:1/-1}
  .member-identity-grid{grid-template-columns:1fr 1fr}.member-attempt-card{grid-template-columns:1fr auto}.member-attempt-card>a{grid-column:1/-1}
  .exam-member-status.login-required{align-items:flex-start;flex-direction:column}
}


/* ===== BrainLab STEM V8.1 — Apple-style level selector ===== */
.series-level-mini-row{display:flex;gap:6px;flex-wrap:wrap;margin:12px 0 4px}
.series-level-mini{display:inline-flex;align-items:center;justify-content:center;padding:6px 9px;border-radius:999px;font-size:.57rem;font-weight:900;border:1px solid #ddd7d2;background:#f5f2ef;color:#8a817b}
.series-level-mini.available.level-basic{background:#e9f5ff;border-color:#b9d9f3;color:#25689a}
.series-level-mini.available.level-core{background:#e8efff;border-color:#b7c8f3;color:#284fa8}
.series-level-mini.available.level-advanced{background:#eee9ff;border-color:#c9bcf2;color:#6541b3}
.series-level-mini.available.level-expert{background:#27213e;border-color:#27213e;color:#fff}
.series-level-mini.unavailable{opacity:.45;text-decoration:line-through}
.exam-series-card .product-image img{transition:transform .35s ease}
.exam-series-card:hover .product-image img{transform:scale(1.025)}

.exam-series-page main{background:#fff}
.series-loading-shell,.series-error-shell{min-height:68vh;display:grid;place-items:center;align-content:center;gap:12px;text-align:center}
.series-topbar{display:flex;justify-content:space-between;align-items:center;padding-top:22px;font-size:.68rem;color:#716a65}
.series-topbar a{color:#9f171d;text-decoration:none;font-weight:900}
.series-product-grid{display:grid;grid-template-columns:1fr .92fr;gap:70px;align-items:start;padding-top:45px;padding-bottom:50px}
.series-copy-column{padding-top:25px}
.series-eyebrow{display:block;color:#0b5dbb;font-size:.7rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}
.series-copy-column h1{font-size:clamp(2.5rem,5vw,4.8rem);line-height:1.03;margin:12px 0 10px;letter-spacing:-.045em}
.series-grade{font-size:1rem;color:#77706b;margin:0 0 38px}
.series-level-heading{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px}
.series-level-heading span,.series-level-heading strong{display:block}
.series-level-heading span{font-size:.68rem;color:#81766f}
.series-level-heading strong{font-size:1.35rem;margin-top:4px}
.series-level-heading small{max-width:270px;text-align:right;color:#8c817a;line-height:1.5}
.apple-level-selector{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.apple-level-pill{min-height:74px;border:1px solid #dad5d1;background:#f5f3f1;border-radius:22px;padding:12px 10px;font:inherit;cursor:pointer;transition:.2s ease}
.apple-level-pill span,.apple-level-pill small{display:block}
.apple-level-pill span{font-size:.78rem;font-weight:900}
.apple-level-pill small{font-size:.56rem;color:#837a74;margin-top:5px}
.apple-level-pill:hover:not(:disabled){transform:translateY(-2px)}
.apple-level-pill.active{border-color:transparent;box-shadow:0 8px 22px rgba(35,51,86,.15)}
.apple-level-pill.active.level-basic{background:#dceeff;color:#185d91}
.apple-level-pill.active.level-core{background:#155fbb;color:#fff}
.apple-level-pill.active.level-core small{color:#dceaff}
.apple-level-pill.active.level-advanced{background:#6e43c7;color:#fff}
.apple-level-pill.active.level-advanced small{color:#eee7ff}
.apple-level-pill.active.level-expert{background:#211b34;color:#fff}
.apple-level-pill.active.level-expert small{color:#dfd9f4}
.apple-level-pill:disabled{opacity:.36;cursor:not-allowed}
.series-set-selector-wrap{margin-top:22px}
.series-set-selector-wrap>span{font-size:.66rem;color:#716862;font-weight:800}
.series-set-selector{display:flex;gap:8px;flex-wrap:wrap;margin-top:9px}
.series-set-pill{border:1px solid #d8d1cc;background:#fff;border-radius:999px;padding:9px 14px;font:inherit;font-size:.64rem;font-weight:900;cursor:pointer}
.series-set-pill.active{background:#1e1b1a;color:#fff;border-color:#1e1b1a}
.series-price-block{margin:35px 0 20px}
.series-price-block span,.series-price-block strong{display:block}
.series-price-block span{font-size:.67rem;color:#857b74}
.series-price-block strong{font-size:1.55rem;margin-top:5px}
.series-primary-actions{display:flex;gap:10px;flex-wrap:wrap}
.series-start-button{min-width:205px;justify-content:center}
.series-level-explanation{display:flex;gap:14px;align-items:flex-start;margin-top:28px;padding:18px;border-radius:18px;background:#f6f4f2}
.series-level-explanation strong{font-size:.75rem}
.series-level-explanation p{font-size:.67rem;line-height:1.65;color:#716a65;margin:5px 0 0}
.series-explanation-symbol{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-size:1.15rem;font-weight:900;flex:none}
.series-explanation-symbol.level-basic{background:#dceeff;color:#185d91}
.series-explanation-symbol.level-core{background:#155fbb;color:#fff}
.series-explanation-symbol.level-advanced{background:#6e43c7;color:#fff}
.series-explanation-symbol.level-expert{background:#211b34;color:#fff}

.series-visual-column{position:sticky;top:95px}
.series-cover-stage{position:relative;min-height:520px;border-radius:36px;background:linear-gradient(145deg,#f6f7f9,#e8edf4);display:grid;place-items:center;padding:40px;overflow:hidden}
.series-cover-stage:before{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:#fff;filter:blur(2px);opacity:.75}
.series-cover-stage img{position:relative;z-index:1;max-width:92%;max-height:450px;object-fit:contain;border-radius:20px;box-shadow:0 22px 50px rgba(18,35,58,.16)}
.series-level-emblem{position:absolute;z-index:2;right:25px;top:25px;width:52px;height:52px;border-radius:18px;display:grid;place-items:center;color:#fff;font-size:1.25rem;font-weight:900;box-shadow:0 10px 24px rgba(0,0,0,.15)}
.series-level-emblem.level-basic{background:#3c8fc8}
.series-level-emblem.level-core{background:#155fbb}
.series-level-emblem.level-advanced{background:#6e43c7}
.series-level-emblem.level-expert{background:#211b34}
.series-image-dots{display:flex;justify-content:center;gap:10px;margin-top:17px}
.series-image-dots button{width:10px;height:10px;border:0;border-radius:50%;background:#b7b7b7;padding:0;cursor:pointer}
.series-image-dots button.active{background:#222}
.series-cover-caption{text-align:center;color:#847b75;font-size:.66rem;margin-top:14px}

.series-details{padding-bottom:80px}
.series-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;border-top:1px solid #e6e1dd;padding-top:28px}
.series-stat-grid article{padding:18px;border-radius:20px;background:#f7f5f3}
.series-stat-grid span,.series-stat-grid strong{display:block}
.series-stat-grid span{font-size:.61rem;color:#7f756f}
.series-stat-grid strong{font-size:1rem;margin-top:6px}
.series-description-card,.series-progression-card{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin-top:25px;padding:35px;border-radius:28px;background:#f7f5f3}
.series-section-kicker{font-size:.62rem;font-weight:900;letter-spacing:.12em;color:#0b5dbb}
.series-description-card h2,.series-progression-card h2{font-size:1.65rem;margin:8px 0 12px}
.series-description-card p,.series-progression-card p{color:#706862;line-height:1.8}
.series-topic-list>strong{font-size:.72rem}
.series-topic-list>div{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.series-topic-list span{display:inline-flex;padding:8px 11px;border-radius:999px;background:#fff;border:1px solid #e1d9d3;font-size:.61rem}
.series-progress-track{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;align-items:stretch}
.progress-level{padding:15px 10px;border-radius:18px;background:#fff;border:1px solid #e1dad5;text-align:center;opacity:.48}
.progress-level.available{opacity:1}
.progress-level.active{outline:3px solid rgba(21,95,187,.18)}
.progress-level span,.progress-level strong,.progress-level small{display:block}
.progress-level span{font-size:1.15rem}.progress-level strong{font-size:.68rem;margin-top:7px}.progress-level small{font-size:.53rem;color:#8a817b;margin-top:4px}

@media(max-width:900px){
  .series-product-grid{grid-template-columns:1fr;gap:32px;padding-top:18px}
  .series-visual-column{position:static;order:-1}
  .series-cover-stage{min-height:430px}
  .series-copy-column{padding-top:0}
  .series-description-card,.series-progression-card{grid-template-columns:1fr;gap:22px}
}
@media(max-width:640px){
  .series-topbar{padding-left:18px;padding-right:18px}
  .series-product-grid{padding-left:18px;padding-right:18px}
  .series-copy-column h1{font-size:2.65rem}
  .series-level-heading{align-items:flex-start;flex-direction:column}
  .series-level-heading small{text-align:left}
  .apple-level-selector{display:flex;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory}
  .apple-level-pill{min-width:128px;scroll-snap-align:start}
  .series-cover-stage{min-height:350px;border-radius:0;margin-left:-18px;margin-right:-18px}
  .series-cover-stage img{max-width:86%;max-height:300px}
  .series-stat-grid{grid-template-columns:1fr 1fr}
  .series-details{padding-left:18px;padding-right:18px}
  .series-description-card,.series-progression-card{padding:24px 20px}
  .series-progress-track{grid-template-columns:1fr 1fr}
  .series-primary-actions .btn{width:100%}
}


/* BrainLab STEM V8.2 — clickable series levels */
.series-level-mini-row a.series-level-mini{
  text-decoration:none;
  cursor:pointer;
  transition:transform .16s ease, box-shadow .16s ease;
}
.series-level-mini-row a.series-level-mini:hover{
  transform:translateY(-2px);
  box-shadow:0 5px 13px rgba(30,54,88,.13);
}
.series-card-cover-link{display:block;height:100%}
.series-card-title-link{color:inherit;text-decoration:none}
.series-card-title-link:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}


/* ===== V8.3 Topic Cover System ===== */
.exam-series-card .series-card-cover-link{
  background:linear-gradient(145deg,#f8f6f3,#eef3f8);
  display:grid;
  place-items:center;
}
.exam-series-card .series-card-cover-link img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.exam-series-card .sale-badge{
  max-width:62%;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* ===== BrainLab Protected Document Shop V9 ===== */
.document-loading{grid-column:1/-1;padding:48px;text-align:center;color:var(--muted);font-weight:800}
.document-card .product-title a{color:inherit;text-decoration:none}
.document-cover-wrap{position:relative}
.document-access-badge{position:absolute;left:12px;bottom:12px;padding:6px 9px;border-radius:999px;background:#e7f7ed;color:#246a47;font-size:.68rem;font-weight:900;box-shadow:0 4px 14px rgba(0,0,0,.08)}
.document-tag-row{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0}
.document-tag-row span{padding:5px 8px;border-radius:999px;background:#f3ece6;color:#6f6259;font-size:.68rem;font-weight:800}
.document-detail-layout{display:grid;grid-template-columns:minmax(280px,.85fr) minmax(380px,1.15fr);gap:34px;align-items:start;margin-top:20px}
.document-detail-cover-panel{position:sticky;top:20px}
.document-detail-cover{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:24px;background:#eee6dd;box-shadow:0 18px 45px rgba(55,42,34,.16)}
.document-protection-note{display:grid;gap:5px;margin-top:14px;padding:15px 17px;border:1px solid #dfd2c8;border-radius:16px;background:#fff9f4}
.document-protection-note strong{color:#8f161b}.document-protection-note span{color:var(--muted);font-size:.78rem;line-height:1.6}
.document-detail-info{padding:28px;border:1px solid #e4d8cf;border-radius:24px;background:#fff;box-shadow:0 12px 34px rgba(65,51,42,.08)}
.document-detail-badges{display:flex;gap:7px;flex-wrap:wrap}.document-detail-badges span{padding:6px 9px;border-radius:999px;background:#f2eae4;font-size:.7rem;font-weight:900;color:#6d5f56}
.document-detail-info h1{margin:16px 0 10px;font-size:clamp(1.65rem,3vw,2.55rem);line-height:1.18}.document-detail-info>p{color:var(--muted);line-height:1.75}
.document-price{margin:18px 0;color:#a71418;font-size:1.7rem;font-weight:950}
.document-detail-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:18px 0}
.document-detail-stats div{padding:13px;border-radius:14px;background:#faf5f1}.document-detail-stats span,.document-detail-stats strong{display:block}.document-detail-stats span{font-size:.67rem;color:var(--muted)}.document-detail-stats strong{margin-top:4px;font-size:.82rem}
.document-main-action{width:100%;justify-content:center;padding:14px 18px;font-size:1rem}.document-main-action.disabled{pointer-events:none;opacity:.65}
.document-action-message{min-height:27px;margin-top:10px;font-size:.8rem;font-weight:800}.document-action-message.success{color:#26704a}.document-action-message.error{color:#a71418}
.document-security-list{display:grid;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid #eee4dc;color:#665b54;font-size:.78rem}
.document-denied{max-width:700px;margin:70px auto;padding:42px;text-align:center;border:1px solid #e3d6cc;border-radius:24px;background:#fff}.document-denied h1{margin-top:0}.document-denied p{color:var(--muted);line-height:1.7}
.protected-reader-page{background:#211d1a;user-select:none;-webkit-user-select:none}
.protected-reader-shell{width:min(1500px,calc(100% - 24px));margin:0 auto;padding:18px 0 52px}
.reader-header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 22px;border-radius:18px;background:#302923;color:#fff}.reader-header span{font-size:.65rem;letter-spacing:.12em;color:#e0b9ab;font-weight:900}.reader-header h1{margin:4px 0;font-size:1.25rem}.reader-header p{margin:0;color:#cbbfb7;font-size:.75rem}
.reader-toolbar{position:sticky;top:8px;z-index:20;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin:12px 0;padding:10px;border-radius:14px;background:rgba(255,255,255,.95);box-shadow:0 10px 28px rgba(0,0,0,.25);backdrop-filter:blur(10px)}
.reader-toolbar button{border:1px solid #d9cdc4;border-radius:9px;padding:8px 11px;background:#fff;font:inherit;font-size:.75rem;font-weight:900;cursor:pointer}.reader-toolbar button:disabled{opacity:.35;cursor:not-allowed}.reader-toolbar label{display:flex;align-items:center;gap:6px;font-size:.75rem;font-weight:800}.reader-toolbar input{width:65px;padding:7px;border:1px solid #d7cbc2;border-radius:8px;text-align:center}.reader-toolbar-separator{width:1px;height:25px;background:#ded3ca}.reader-message{min-height:23px;text-align:center;color:#eadfd7;font-size:.75rem;font-weight:800}.reader-message.success{color:#bde9cb}.reader-message.error{color:#ffb9b9}
.reader-stage{overflow:auto;padding:10px 4px 24px}.reader-page-frame{position:relative;width:min(1200px,100%);margin:auto;overflow:hidden;border-radius:8px;background:#fff;box-shadow:0 18px 50px rgba(0,0,0,.4)}
.reader-page-image{display:block;width:100%;height:auto;min-height:320px;object-fit:contain;pointer-events:none}
.reader-watermark{position:absolute;inset:0;display:grid;place-items:center;padding:20px;color:rgba(135,20,26,.22);font-size:clamp(.9rem,2vw,1.7rem);font-weight:950;letter-spacing:.04em;transform:rotate(-18deg);pointer-events:none;text-align:center;text-shadow:0 0 1px rgba(255,255,255,.7)}
.reader-watermark::before,.reader-watermark::after{content:attr(data-copy);position:absolute}
.reader-legal-note{max-width:900px;margin:10px auto 0;text-align:center;color:#b9aaa0;font-size:.7rem;line-height:1.65}
.member-document-library{margin-bottom:18px}.member-document-list{display:grid;gap:10px}.member-document-card{display:grid;grid-template-columns:120px 1fr auto;gap:14px;align-items:center;padding:12px;border:1px solid #e4d8cf;border-radius:15px;background:#fff}.member-document-card img,.member-document-placeholder{width:120px;aspect-ratio:16/9;object-fit:cover;border-radius:10px;background:#f1e9e2}.member-document-placeholder{display:grid;place-items:center;font-size:1.35rem}.member-document-card span{font-size:.66rem;color:#9a1b20;font-weight:900}.member-document-card h3{margin:3px 0;font-size:.9rem}.member-document-card p{margin:0;color:var(--muted);font-size:.7rem}.document-order-status{padding:7px 9px;border-radius:999px;background:#fff2ca;color:#77570b!important;white-space:nowrap}

@media (max-width:850px){
  .document-detail-layout{grid-template-columns:1fr}.document-detail-cover-panel{position:static}.document-detail-stats{grid-template-columns:1fr}.reader-header{align-items:flex-start;flex-direction:column}.member-document-card{grid-template-columns:82px 1fr}.member-document-card img,.member-document-placeholder{width:82px}.member-document-card>a,.document-order-status{grid-column:1/-1;justify-self:stretch;text-align:center}.reader-toolbar-separator{display:none}
}

/* ===== Protected document admin ===== */
.document-admin-card{margin-top:18px}.document-admin-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,.6fr);gap:18px}.document-admin-form{min-width:0}.document-admin-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.document-admin-wide-label{display:grid;gap:6px;margin-top:11px;font-size:.76rem;font-weight:800}.document-upload-mode{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.document-upload-mode label{display:flex;align-items:center;gap:7px;padding:9px 12px;border:1px solid #ddcfc5;border-radius:999px;background:#fff;font-size:.72rem;font-weight:900;cursor:pointer}.document-upload-mode label:has(input:checked){border-color:#a71418;background:#fff0ef;color:#94171c}.document-upload-mode input{accent-color:#a71418}.document-upload-panels{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.document-upload-box[hidden]{display:none}.document-upload-box{display:grid;gap:8px;padding:14px;border:2px dashed #d9cbc1;border-radius:14px;background:#fffaf6;font-size:.76rem;font-weight:900;cursor:pointer}.document-upload-box input{font:inherit;font-size:.7rem}.document-upload-box span{color:#877a71;font-size:.67rem;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.document-upload-hint{margin:8px 2px 0;color:#7f736b;font-size:.66rem;line-height:1.5}.document-replace-check{display:flex;align-items:center;gap:7px;margin-top:10px;font-size:.72rem;font-weight:800}.document-admin-actions{display:flex;gap:8px;margin-top:14px}.document-upload-progress{height:9px;margin-top:13px;overflow:hidden;border-radius:999px;background:#eee5de}.document-upload-progress i{display:block;width:0;height:100%;border-radius:999px;background:#a71418;transition:.2s}.document-admin-preview{align-self:start;position:sticky;top:15px;padding:14px;border:1px solid #e2d6cc;border-radius:17px;background:#fff}.document-admin-preview img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;background:#eee}.document-admin-preview>span{display:inline-flex;margin-top:12px;padding:5px 8px;border-radius:999px;background:#f3ece6;color:#8d171c;font-size:.65rem;font-weight:900}.document-admin-preview h3{margin:8px 0 5px}.document-admin-preview p{min-height:46px;margin:0;color:#7b7068;font-size:.7rem;line-height:1.55}.document-admin-preview>strong{display:block;margin-top:10px;color:#a71418}.document-admin-list-toolbar{display:grid;grid-template-columns:1fr auto;gap:9px;margin:18px 0 12px}.document-admin-item{grid-template-columns:105px 1fr auto}.document-access-admin{display:grid;grid-template-columns:minmax(200px,1.2fr) minmax(180px,1fr) minmax(220px,1.2fr) auto auto;gap:9px;align-items:end;margin-top:20px;padding:14px;border-radius:15px;background:#faf6f2}.document-access-admin h3{margin:0 0 4px}.document-access-admin p{margin:0;color:#80746c;font-size:.68rem}.document-access-list{display:grid;gap:7px;margin-top:10px}.document-access-row{display:grid;grid-template-columns:1fr 1.2fr auto;gap:10px;align-items:center;padding:10px 12px;border:1px solid #e4d8cf;border-radius:12px;background:#fff}.document-access-row strong,.document-access-row span{display:block}.document-access-row span{margin-top:3px;color:#80736b;font-size:.64rem}.document-access-row button{border:1px solid #e1c9c7;border-radius:9px;padding:7px 9px;background:#fff1f0;color:#a52328;font:inherit;font-size:.65rem;font-weight:900;cursor:pointer}.document-order-admin{margin-top:22px;padding-top:18px;border-top:1px solid #eadfd6}.document-order-admin h3{margin:0}.document-order-table{min-width:900px}.document-order-pill{display:inline-flex;padding:5px 8px;border-radius:999px;font-size:.62rem;font-weight:900}.document-order-pill.pending{background:#fff1c8;color:#75560a}.document-order-pill.approved{background:#e7f6ed;color:#256c49}.document-order-pill.rejected{background:#ffe9e8;color:#a32126}.document-order-actions{display:flex;gap:5px}.document-order-actions button{border:1px solid #dcd0c7;border-radius:8px;padding:6px 8px;background:#fff;font:inherit;font-size:.62rem;font-weight:900;cursor:pointer}.document-order-actions button:first-child{color:#26704a}.document-order-actions button:last-child{color:#a32126}
@media(max-width:950px){.document-admin-grid{grid-template-columns:1fr}.document-admin-preview{position:static}.document-access-admin{grid-template-columns:1fr 1fr}.document-access-admin>div{grid-column:1/-1}.document-upload-panels{grid-template-columns:1fr}}
@media(max-width:650px){.document-admin-fields{grid-template-columns:1fr}.document-access-admin{grid-template-columns:1fr}.document-access-row{grid-template-columns:1fr}.document-admin-item{grid-template-columns:80px 1fr}.document-admin-item .qa-item-actions{grid-column:1/-1}.document-admin-actions{display:grid}.document-upload-panels{grid-template-columns:1fr}}