/* ==========================================================================
   SyllabusHub — Index (Hub) Page Styles
   ========================================================================== */

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(220,178,86,.16), transparent 60%),
    linear-gradient(175deg,var(--sh-navy-900) 0%, var(--sh-navy-950) 78%);
  color:var(--text-on-navy);
  padding-block:64px 96px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:26px 26px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.5), transparent 70%);
}
.hero__inner{position:relative;z-index:1;max-width:760px;}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-nav);font-weight:700;font-size:.78rem;letter-spacing:.09em;text-transform:uppercase;
  color:var(--sh-gold-500);background:rgba(220,178,86,.12);border:1px solid rgba(220,178,86,.35);
  padding:7px 14px;border-radius:var(--radius-pill);margin-bottom:22px;
  animation:sh-rise .6s ease both;
}
.hero__eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--sh-green-600);box-shadow:0 0 0 3px rgba(46,125,91,.35);}
.hero h1{
  font-size:clamp(2.1rem,4.4vw,3.4rem);
  color:#fff;
  animation:sh-rise .7s .05s ease both;
}
.hero h1 .accent{color:var(--sh-gold-500);}
.hero p.lede{
  font-size:1.08rem;color:#b6c0d6;max-width:56ch;
  animation:sh-rise .7s .12s ease both;
}
.hero__stats{
  display:flex;flex-wrap:wrap;gap:28px;margin-top:32px;
  animation:sh-rise .7s .2s ease both;
}
.hero__stat b{display:block;font-family:var(--font-head);font-size:1.5rem;color:#fff;}
.hero__stat span{font-size:.82rem;color:#8fa0c2;font-family:var(--font-nav);}

@keyframes sh-rise{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}

/* ---------- Search ---------- */
.search-zone{
  position:relative;z-index:2;
  margin-top:-52px;
  animation:sh-rise .7s .28s ease both;
}
.search-card{
  background:var(--bg-surface);
  border:1px solid var(--border-hairline);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-pop);
  padding:18px;
}
.search-bar{display:flex;align-items:center;gap:10px;background:var(--bg-surface-alt);border:1px solid var(--border-hairline);border-radius:var(--radius-md);padding:6px 8px 6px 16px;}
.search-bar svg{flex-shrink:0;color:var(--text-muted);}
.search-bar input{
  flex:1;border:0;background:transparent;font:600 1rem/1.4 var(--font-body);color:var(--text-primary);padding:12px 4px;min-width:0;
}
.search-bar input::placeholder{color:var(--text-muted);font-weight:500;}
.search-bar__clear{border:0;background:none;color:var(--text-muted);cursor:pointer;padding:8px;border-radius:50%;display:none;}
.search-bar__clear.show{display:grid;place-items:center;}
.search-bar__clear:hover{background:var(--bg-sunken);color:var(--text-primary);}
.search-kbd{font-family:var(--font-nav);font-size:.72rem;color:var(--text-muted);background:var(--bg-page);border:1px solid var(--border-hairline);border-radius:6px;padding:3px 7px;flex-shrink:0;}

.filter-row{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;align-items:center;}
.filter-scroll{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin;flex:1;}
.filter-scroll::-webkit-scrollbar{height:5px;}
.filter-scroll::-webkit-scrollbar-thumb{background:var(--border-dashed);border-radius:4px;}
.chip{
  font-family:var(--font-nav);font-weight:600;font-size:.84rem;white-space:nowrap;
  padding:9px 16px;border-radius:var(--radius-pill);border:1px solid var(--border-hairline);
  background:var(--bg-surface);color:var(--text-secondary);cursor:pointer;
  transition:background .18s,color .18s,border-color .18s,transform .12s;
  display:inline-flex;align-items:center;gap:6px;
}
.chip .count{font-size:.72rem;opacity:.65;}
.chip:hover{border-color:var(--accent-gold);color:var(--text-primary);transform:translateY(-1px);}
.chip[aria-pressed="true"]{background:var(--sh-navy-700);border-color:var(--sh-navy-700);color:#fff;}
[data-theme="dark"] .chip[aria-pressed="true"]{background:var(--accent-gold);border-color:var(--accent-gold);color:var(--sh-navy-950);}

.select-group{display:flex;gap:8px;flex-shrink:0;}
.sh-select{
  font-family:var(--font-nav);font-weight:600;font-size:.83rem;color:var(--text-secondary);
  background:var(--bg-surface);border:1px solid var(--border-hairline);border-radius:var(--radius-sm);
  padding:9px 32px 9px 12px;cursor:pointer;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235b6270' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat;background-position:right 9px center;appearance:none;
}
.btn-clear{
  font-family:var(--font-nav);font-weight:700;font-size:.83rem;color:var(--sh-danger);
  background:none;border:1px dashed var(--sh-danger);border-radius:var(--radius-sm);padding:9px 14px;cursor:pointer;
  display:none;align-items:center;gap:6px;flex-shrink:0;
}
.btn-clear.show{display:inline-flex;}
.btn-clear:hover{background:rgba(179,67,43,.08);}

/* Sticky compact bar on scroll */
.sticky-search{
  position:fixed;top:0;left:0;right:0;z-index:70;
  transform:translateY(-110%);
  transition:transform .28s ease;
  background:color-mix(in srgb, var(--bg-surface) 92%, transparent);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--border-hairline);
  box-shadow:0 6px 20px -10px rgba(16,28,51,.25);
}
.sticky-search.show{transform:translateY(0);}
.sticky-search__inner{display:flex;align-items:center;gap:14px;padding-block:10px;}
.sticky-search .search-bar{flex:1;padding-block:2px;}
.sticky-search .search-bar input{padding-block:8px;font-size:.92rem;}

/* ---------- Section shells ---------- */
.section{padding-block:64px;}
.section--alt{background:var(--bg-surface-alt);}
.section__head{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;margin-bottom:28px;flex-wrap:wrap;}
.section__eyebrow{font-family:var(--font-nav);font-weight:700;font-size:.76rem;letter-spacing:.09em;text-transform:uppercase;color:var(--accent-gold);margin-bottom:8px;display:block;}
.section h2{font-size:clamp(1.5rem,2.6vw,2rem);}
.section__desc{max-width:60ch;}
.section__meta{font-family:var(--font-nav);font-size:.85rem;color:var(--text-muted);}

/* ---------- Stats strip ---------- */
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border-hairline);border:1px solid var(--border-hairline);border-radius:var(--radius-md);overflow:hidden;margin-top:-44px;position:relative;z-index:1;}
.stat-tile{background:var(--bg-surface);padding:22px 18px;text-align:center;}
.stat-tile b{display:block;font-family:var(--font-head);font-size:1.7rem;color:var(--accent-navy);}
[data-theme="dark"] .stat-tile b{color:var(--sh-gold-500);}
.stat-tile span{font-family:var(--font-nav);font-size:.8rem;color:var(--text-muted);}

/* ---------- Horizontal rail (Featured / Popular / Trending / Recent) ---------- */
.rail{display:flex;gap:18px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x proximity;}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:var(--border-dashed);border-radius:4px;}
.rail .exam-card{min-width:300px;scroll-snap-align:start;}

/* ---------- Category section ---------- */
.category-section{scroll-margin-top:110px;}
.category-section + .category-section{margin-top:56px;}
.category-head{display:flex;align-items:center;gap:14px;margin-bottom:22px;}
.category-head__icon{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.3rem;flex-shrink:0;
  background:var(--sh-navy-700);color:var(--sh-gold-500);
}
.category-head h2{margin:0;font-size:1.35rem;}
.category-head .cat-count{font-family:var(--font-nav);font-size:.82rem;color:var(--text-muted);}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;}

/* ---------- Exam Card (signature element: "admit-card" ticket style) ---------- */
.exam-card{
  position:relative;
  background:var(--bg-surface);
  border:1px solid var(--border-hairline);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  opacity:0;transform:translateY(10px);
}
.exam-card.in-view{animation:sh-card-in .5s ease forwards;}
@keyframes sh-card-in{to{opacity:1;transform:translateY(0);}}
.exam-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:var(--border-dashed);}

.exam-card__ribbon{
  position:absolute;top:14px;right:-6px;font-family:var(--font-nav);font-weight:700;font-size:.68rem;letter-spacing:.03em;
  padding:5px 12px 5px 10px;border-radius:5px 0 0 5px;color:#fff;
  box-shadow:0 3px 8px rgba(0,0,0,.18);
}
.exam-card__ribbon::after{content:"";position:absolute;right:0;top:100%;border-width:6px 6px 0 0;border-style:solid;border-color:transparent;filter:brightness(.7);}
.exam-card__ribbon.latest{background:var(--sh-gold-600);}
.exam-card__ribbon.latest::after{border-color:var(--sh-gold-700) transparent transparent transparent;}
.exam-card__ribbon.updated{background:var(--accent-green);}
.exam-card__ribbon.updated::after{border-color:var(--sh-green-700) transparent transparent transparent;}

.exam-card__top{padding:22px 20px 16px;display:flex;gap:14px;}
.exam-card__icon{
  width:52px;height:52px;border-radius:12px;flex-shrink:0;display:grid;place-items:center;font-size:1.5rem;
  background:linear-gradient(155deg,var(--sh-navy-700),var(--sh-navy-900));color:var(--sh-gold-500);
}
.exam-card__title h3{font-size:1.06rem;margin-bottom:2px;}
.exam-card__org{font-family:var(--font-nav);font-size:.78rem;color:var(--text-muted);}
.exam-card__desc{padding:0 20px;font-size:.9rem;color:var(--text-secondary);margin-bottom:14px;flex-grow:1;}

.exam-card__perforation{
  border-top:2px dashed var(--border-dashed);position:relative;margin:0 20px;
}
.exam-card__perforation::before,.exam-card__perforation::after{
  content:"";position:absolute;top:-8px;width:16px;height:16px;border-radius:50%;background:var(--bg-page);
}
.exam-card__perforation::before{left:-28px;}
.exam-card__perforation::after{right:-28px;}

.exam-card__meta{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px;padding:16px 20px;font-family:var(--font-nav);}
.meta-item{display:flex;flex-direction:column;gap:2px;}
.meta-item .label{font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);}
.meta-item .val{font-size:.85rem;font-weight:600;color:var(--text-primary);}
.meta-item .val.cat-pill{
  display:inline-flex;width:fit-content;background:var(--bg-surface-alt);border:1px solid var(--border-hairline);
  padding:2px 9px;border-radius:var(--radius-pill);font-size:.72rem;font-weight:700;color:var(--accent-navy);
}
[data-theme="dark"] .meta-item .val.cat-pill{color:var(--sh-gold-500);}

.exam-card__actions{display:flex;gap:10px;padding:16px 20px 20px;}
.btn{
  font-family:var(--font-nav);font-weight:700;font-size:.85rem;border-radius:var(--radius-sm);
  padding:11px 14px;display:inline-flex;align-items:center;justify-content:center;gap:7px;cursor:pointer;
  border:1px solid transparent;transition:transform .15s ease, box-shadow .15s ease, background .15s ease;flex:1;
}
.btn:active{transform:scale(.97);}
.btn-primary{background:var(--sh-navy-700);color:#fff;}
.btn-primary:hover{background:var(--sh-navy-800);box-shadow:0 6px 16px -4px rgba(27,42,74,.45);}
[data-theme="dark"] .btn-primary{background:var(--accent-gold);color:var(--sh-navy-950);}
[data-theme="dark"] .btn-primary:hover{background:var(--sh-gold-500);}
.btn-ghost{background:transparent;border-color:var(--border-hairline);color:var(--text-secondary);flex:0 0 auto;width:44px;padding:11px;}
.btn-ghost:hover{border-color:var(--accent-gold);color:var(--text-primary);}

/* ---------- Loading skeleton ---------- */
.skeleton-card{border-radius:var(--radius-md);border:1px solid var(--border-hairline);background:var(--bg-surface);padding:20px;height:308px;display:flex;flex-direction:column;gap:14px;}
.sk{border-radius:8px;background:linear-gradient(100deg,var(--bg-sunken) 20%,var(--border-hairline) 40%,var(--bg-sunken) 60%);background-size:200% 100%;animation:sk-shimmer 1.4s ease-in-out infinite;}
@keyframes sk-shimmer{0%{background-position:150% 0;}100%{background-position:-50% 0;}}
.sk-row{display:flex;gap:12px;}
.sk-circle{width:52px;height:52px;border-radius:12px;flex-shrink:0;}
.sk-line{height:12px;}

/* ---------- No results ---------- */
.no-results{display:none;text-align:center;padding:70px 20px;}
.no-results.show{display:block;}
.no-results__icon{width:66px;height:66px;margin:0 auto 18px;border-radius:50%;background:var(--bg-surface-alt);display:grid;place-items:center;color:var(--text-muted);}
.no-results h3{margin-bottom:6px;}
.no-results p{max-width:44ch;margin-inline:auto;}

/* ---------- Quick links ---------- */
.quicklinks{display:flex;flex-wrap:wrap;gap:10px;}
.quicklinks a{
  font-family:var(--font-nav);font-weight:600;font-size:.86rem;padding:9px 15px;border-radius:var(--radius-pill);
  background:var(--bg-surface);border:1px solid var(--border-hairline);color:var(--text-secondary);
  transition:border-color .18s,color .18s,transform .15s;
}
.quicklinks a:hover{border-color:var(--accent-gold);color:var(--text-primary);transform:translateY(-2px);}

/* ---------- Newsletter ---------- */
.newsletter{
  border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--sh-navy-700),var(--sh-navy-950));
  color:#fff;padding:44px;display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.newsletter::before{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(220,178,86,.25),transparent 70%);}
.newsletter h2{color:#fff;margin-bottom:6px;font-size:1.4rem;}
.newsletter p{color:#b6c0d6;margin:0;}
.newsletter form{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:1;}
.newsletter input{
  padding:13px 16px;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.08);color:#fff;font-family:var(--font-body);min-width:240px;
}
.newsletter input::placeholder{color:#96a2bd;}
.newsletter .btn-primary{background:var(--sh-gold-600);color:var(--sh-navy-950);flex:0 0 auto;padding:13px 22px;}
.newsletter .btn-primary:hover{background:var(--sh-gold-500);}
.newsletter .form-note{width:100%;font-size:.78rem;color:#8fa0c2;margin-top:8px;}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--border-hairline);}
.faq-q{
  width:100%;text-align:left;background:none;border:0;padding:20px 4px;display:flex;justify-content:space-between;
  align-items:center;gap:16px;cursor:pointer;color:var(--text-primary);font-family:var(--font-head);font-weight:600;font-size:1rem;
}
.faq-q svg{flex-shrink:0;transition:transform .25s ease;color:var(--accent-gold);}
.faq-item[data-open="true"] .faq-q svg{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item[data-open="true"] .faq-a{max-height:260px;}
.faq-a p{padding:0 4px 20px;}

/* ---------- Download-all banner ---------- */
.download-banner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border:1px dashed var(--border-dashed);border-radius:var(--radius-md);padding:22px 26px;background:var(--bg-surface);
}
.download-banner__left{display:flex;align-items:center;gap:14px;}
.download-banner__icon{width:44px;height:44px;border-radius:10px;background:var(--sh-green-100);color:var(--sh-green-700);display:grid;place-items:center;flex-shrink:0;}
[data-theme="dark"] .download-banner__icon{background:rgba(73,168,128,.15);color:#7fd1ac;}
.download-banner h3{margin:0;font-size:1rem;}
.download-banner p{margin:2px 0 0;font-size:.85rem;}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;bottom:24px;right:24px;width:46px;height:46px;border-radius:50%;background:var(--sh-navy-700);
  color:#fff;border:0;display:grid;place-items:center;cursor:pointer;box-shadow:var(--shadow-pop);z-index:50;
  opacity:0;pointer-events:none;transform:translateY(8px);transition:opacity .25s,transform .25s;
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
[data-theme="dark"] .to-top{background:var(--accent-gold);color:var(--sh-navy-950);}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .stats-strip{grid-template-columns:repeat(2,1fr);}
  .newsletter{padding:30px;}
}
@media (max-width:640px){
  .hero{padding-block:44px 76px;}
  .search-zone{margin-top:-40px;}
  .grid{grid-template-columns:1fr;}
  .exam-card__meta{grid-template-columns:1fr 1fr;}
  .filter-row{flex-direction:column;align-items:stretch;}
  .select-group{flex-wrap:wrap;}
}