/* ============================================================
   ASE Informatică Economică — Index materiale
   Tema "Velvet & Silk": dark = red velvet + navy profund,
   light = ruby vibrant + silk white.
   Tipografie: Cormorant (display) + Montserrat (UI/body)
   ============================================================ */

:root{
  /* Light — Ruby & Silk White */
  --bg:#faf6f1;
  --bg-2:#f3eae2;
  --surface:#ffffff;
  --surface-2:#f7efe8;
  --text:#141c36;
  --muted:#5d6480;
  --line:#e9ddd2;
  --line-soft:#f0e6dc;
  --accent:#bd1a3e;          /* ruby vibrant */
  --accent-ink:#8f1230;      /* ruby închis pentru text mic */
  --accent-soft:#fae5ea;
  --navy:#16224e;
  --navy-ink:#101a3a;
  --navy-soft:#e8ecf7;
  --on-accent:#fff;
  --success:#0b6b4f;
  --danger:#b3261e;
  --shadow:0 14px 40px rgba(76,20,40,.09);
  --shadow-sm:0 4px 14px rgba(76,20,40,.06);
  --radius:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --focus:#bd1a3e;
  --font-display:"Cormorant",Georgia,"Times New Roman",serif;
  --font-body:"Montserrat",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  color-scheme:light;
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    /* Dark — Red Velvet & Deep Navy */
    --bg:#0a1128;
    --bg-2:#0c1531;
    --surface:#111a3d;
    --surface-2:#182350;
    --text:#f4eee6;          /* silk white */
    --muted:#a9b2cf;
    --line:#26305c;
    --line-soft:#1e2749;
    --accent:#e0576f;        /* red velvet, mat */
    --accent-ink:#f0788c;
    --accent-soft:#3a1430;
    --navy:#1b2657;
    --navy-ink:#f4eee6;
    --navy-soft:#1c2857;
    --on-accent:#fff5f2;
    --success:#7ddfb4;
    --danger:#ff8a80;
    --shadow:0 18px 46px rgba(2,6,23,.5);
    --shadow-sm:0 6px 18px rgba(2,6,23,.35);
    --focus:#f0788c;
    color-scheme:dark;
  }
}

:root[data-theme="dark"]{
  --bg:#0a1128;
  --bg-2:#0c1531;
  --surface:#111a3d;
  --surface-2:#182350;
  --text:#f4eee6;
  --muted:#a9b2cf;
  --line:#26305c;
  --line-soft:#1e2749;
  --accent:#e0576f;
  --accent-ink:#f0788c;
  --accent-soft:#3a1430;
  --navy:#1b2657;
  --navy-ink:#f4eee6;
  --navy-soft:#1c2857;
  --on-accent:#fff5f2;
  --success:#7ddfb4;
  --danger:#ff8a80;
  --shadow:0 18px 46px rgba(2,6,23,.5);
  --shadow-sm:0 6px 18px rgba(2,6,23,.35);
  --focus:#f0788c;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:15.5px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
::selection{background:var(--accent);color:var(--on-accent)}

.shell{width:min(1180px,calc(100% - 36px));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;left:14px;top:14px;z-index:2000;padding:10px 16px;background:var(--surface);border:2px solid var(--accent);border-radius:var(--radius-sm);transform:translateY(-160%);font-weight:600}
.skip-link:focus{transform:none}

/* ---------- Topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:13px max(18px,calc((100vw - 1180px)/2));
  border-bottom:1px solid var(--line-soft);
  background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.brand{display:flex;gap:12px;align-items:center;text-decoration:none}
.brand-mark{
  display:grid;place-items:center;width:42px;height:42px;border-radius:13px;
  background:linear-gradient(135deg,var(--accent) 0%,var(--navy) 130%);
  color:#fff;font-family:var(--font-display);font-weight:700;font-size:19px;
  letter-spacing:.02em;box-shadow:var(--shadow-sm);
}
.brand strong{display:block;font-size:14.5px;font-weight:700;letter-spacing:.01em}
.brand small{display:block;font-size:11.5px;color:var(--muted);font-weight:500;letter-spacing:.05em}
.top-actions{display:flex;gap:10px;align-items:center}

/* ---------- Butoane ---------- */
.btn,.icon-btn{
  min-height:44px;border:1px solid transparent;border-radius:12px;
  font:inherit;font-size:14px;font-weight:600;cursor:pointer;
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 18px;text-decoration:none}
.btn.primary{background:var(--accent);color:var(--on-accent);box-shadow:var(--shadow-sm)}
.btn.primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn.secondary{background:var(--surface);border-color:var(--line);color:var(--text)}
.btn.secondary:hover{border-color:var(--accent);color:var(--accent-ink)}
.btn.danger{background:transparent;border-color:color-mix(in srgb,var(--danger) 55%,var(--line));color:var(--danger)}
.btn.danger:hover{background:color-mix(in srgb,var(--danger) 12%,transparent)}
.icon-btn{width:44px;padding:0;display:grid;place-items:center;background:var(--surface);border-color:var(--line);color:var(--text)}
.icon-btn:hover{border-color:var(--accent);color:var(--accent-ink)}
.icon-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- Hero ---------- */
.hero{position:relative;padding:84px 0 48px}
.hero::before{
  content:"";position:absolute;inset:-140px -20% auto;height:420px;pointer-events:none;z-index:-1;
  background:
    radial-gradient(42% 60% at 18% 30%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 70%),
    radial-gradient(40% 55% at 82% 20%,color-mix(in srgb,var(--navy) 20%,transparent),transparent 72%);
  filter:blur(2px);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--accent-ink);font-size:11.5px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--accent);border-radius:2px}
.hero h1{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(42px,6.4vw,74px);line-height:1.04;letter-spacing:-.015em;
  max-width:860px;margin:16px 0 18px;
}
.hero h1 em{font-style:italic;color:var(--accent);font-weight:600}
.hero>p{max-width:680px;color:var(--muted);font-size:16.5px;margin:0 0 30px}

/* ---------- Căutare ---------- */
.search-wrap{position:relative;display:flex;align-items:center;max-width:660px}
.search-wrap svg{position:absolute;left:18px;width:19px;height:19px;color:var(--muted);fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.search-wrap input{
  width:100%;min-height:58px;padding:0 56px;
  border-radius:16px;border:1px solid var(--line);
  background:var(--surface);color:var(--text);
  font:inherit;font-size:15.5px;box-shadow:var(--shadow-sm);outline:none;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-wrap input::placeholder{color:var(--muted)}
.search-wrap input:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}
.search-wrap kbd{
  position:absolute;right:16px;padding:4px 9px;border:1px solid var(--line);
  border-radius:7px;background:var(--surface-2);color:var(--muted);
  font:600 12px/1 var(--font-body);
}

/* ---------- Statistici ---------- */
.stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.stat{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line-soft);
  font-size:12.5px;font-weight:600;color:var(--muted);box-shadow:var(--shadow-sm);
}
.stat strong{color:var(--text);font-weight:700}
.stat .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* ---------- Workspace ---------- */
.workspace{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;padding-bottom:84px}
.sidebar{position:sticky;top:86px;align-self:start}
.sidebar-title{font-size:11px;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);font-weight:700;margin-bottom:12px}
.filter-group{margin-bottom:16px}
.filter-btn{
  width:100%;min-height:42px;padding:9px 12px;border:0;background:transparent;
  color:var(--muted);font:inherit;font-size:14px;font-weight:600;text-align:left;
  border-radius:var(--radius-sm);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:8px;
  transition:background .16s ease,color .16s ease;
}
.filter-btn:hover{background:var(--surface-2);color:var(--text)}
.filter-btn.active{background:var(--accent-soft);color:var(--accent-ink)}
.filter-btn .count{
  font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;
  background:var(--surface-2);color:var(--muted);
}
.filter-btn.active .count{background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--accent-ink)}
.filter-sub{padding-left:12px;border-left:1.5px solid var(--line);margin:4px 0 0 14px;display:grid;gap:2px}
.filter-sub .filter-btn{min-height:36px;font-size:13px;font-weight:500}

.content-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
.content-head h2{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(28px,3.4vw,38px);letter-spacing:-.01em;line-height:1.1;margin:6px 0 0;
}

/* ---------- Catalog ---------- */
.catalog{display:grid;gap:16px}
.semester{
  background:var(--surface);border:1px solid var(--line-soft);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
}
.semester>summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
  min-height:76px;padding:18px 22px;cursor:pointer;
  transition:background .16s ease;
}
.semester>summary::-webkit-details-marker{display:none}
.semester>summary:hover{background:color-mix(in srgb,var(--surface-2) 60%,transparent)}
.semester-title{display:flex;gap:14px;align-items:center;min-width:0}
.semester-badge{
  flex:none;min-width:52px;padding:7px 10px;border-radius:11px;
  background:var(--accent-soft);color:var(--accent-ink);
  font-size:12px;font-weight:800;text-align:center;letter-spacing:.04em;
}
.semester-title strong{display:block;font-size:16px;font-weight:700}
.semester-meta{color:var(--muted);font-size:12.5px;margin-top:2px}
.semester>summary .chev{flex:none;color:var(--muted);transition:transform .2s ease}
.semester[open]>summary .chev{transform:rotate(180deg)}
.semester-body{padding:2px 22px 22px}

.drive-card{
  display:flex;justify-content:space-between;gap:16px;align-items:center;
  padding:14px 16px;margin-bottom:16px;
  border:1px solid var(--line-soft);border-radius:var(--radius-md);
  background:
    linear-gradient(120deg,color-mix(in srgb,var(--navy-soft) 55%,transparent),transparent 60%),
    var(--surface-2);
}
.drive-card strong{display:block;font-size:14px;font-weight:700}
.drive-card span{color:var(--muted);font-size:12px}
.drive-card .btn{flex:none}

.subjects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.subject{
  border:1px solid var(--line-soft);border-radius:var(--radius-md);
  padding:18px;min-width:0;background:var(--surface);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.subject:hover{border-color:color-mix(in srgb,var(--accent) 35%,var(--line-soft));box-shadow:var(--shadow-sm)}
.subject-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.subject h3{font-size:15.5px;line-height:1.35;margin:0;font-weight:700;overflow-wrap:anywhere}
.resource-count{
  white-space:nowrap;font-size:11px;font-weight:700;color:var(--accent-ink);
  background:var(--accent-soft);padding:4px 9px;border-radius:999px;
}
.resources{display:grid;gap:8px;margin-top:14px}
.resource{
  display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:11px;align-items:center;
  padding:9px 10px;border-radius:var(--radius-sm);
  background:var(--surface-2);border:1px solid transparent;
  transition:border-color .16s ease,background .16s ease;
}
.resource:hover{border-color:var(--line);background:var(--surface)}
.resource-icon{
  display:grid;place-items:center;width:36px;height:36px;border-radius:10px;
  background:color-mix(in srgb,var(--navy) 10%,var(--surface));
  color:var(--navy);
}
[data-theme="dark"] .resource-icon{color:var(--accent-ink);background:color-mix(in srgb,var(--accent) 14%,transparent)}
.resource-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.resource-text{min-width:0}
.resource-text strong{font-size:13.5px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.resource-text span{font-size:11.5px;color:var(--muted);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.resource-actions{display:flex;gap:5px}
.mini-btn{
  display:grid;place-items:center;width:34px;height:34px;
  border:1px solid var(--line);border-radius:9px;
  background:var(--surface);color:var(--text);text-decoration:none;cursor:pointer;
  font-size:15px;line-height:1;
  transition:border-color .16s ease,color .16s ease,transform .16s ease;
}
.mini-btn:hover{border-color:var(--accent);color:var(--accent-ink);transform:translateY(-1px)}

.empty{
  margin-top:14px;padding:12px 14px;border-radius:var(--radius-sm);
  border:1px dashed var(--line);color:var(--muted);font-size:13px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
}
.empty .drive-link{
  color:var(--accent-ink);font-weight:700;font-size:12.5px;text-decoration:none;
  border-bottom:1.5px solid color-mix(in srgb,var(--accent) 40%,transparent);
}
.empty .drive-link:hover{border-bottom-color:var(--accent)}

.uncategorized{margin-top:34px}
.uncategorized h2{font-family:var(--font-display);font-weight:600;font-size:26px;margin:0 0 14px}
.notice{
  padding:20px;border:1px dashed var(--line);border-radius:var(--radius-md);
  color:var(--muted);background:var(--surface);font-size:14px;
}
.notice code{background:var(--surface-2);padding:2px 7px;border-radius:6px;font-size:13px}

/* ---------- Preview dialog ---------- */
.preview-dialog{
  width:min(1180px,calc(100% - 24px));height:min(840px,calc(100dvh - 24px));
  padding:0;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);color:var(--text);box-shadow:0 34px 90px rgba(2,6,23,.4);
}
.preview-dialog::backdrop{background:rgba(4,8,24,.7);backdrop-filter:blur(6px)}
.preview-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line-soft)}
.preview-head small{display:block;color:var(--accent-ink);font-size:10px;font-weight:800;letter-spacing:.18em}
.preview-head strong{display:block;max-width:56vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:15px}
.preview-actions{display:flex;gap:8px;align-items:center}
.preview-note{font-size:12px;color:var(--muted);padding:9px 18px;border-bottom:1px solid var(--line-soft)}
.preview-dialog iframe{width:100%;height:calc(100% - 108px);border:0;background:#fff}

/* ---------- Footer ---------- */
.footer{
  padding:30px 0 46px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:16px;
  color:var(--muted);font-size:13px;
}
.footer span{font-family:var(--font-display);font-size:15px;font-style:italic}

:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:6px}

/* ---------- Specializări ---------- */
.spec-bar{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  margin-bottom:20px;padding:12px 16px;
  border:1px solid var(--line-soft);border-radius:var(--radius-md);
  background:var(--surface);box-shadow:var(--shadow-sm);
}
.spec-label{font-size:11px;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);font-weight:700;flex:none}
.spec-chips{display:flex;gap:8px;flex-wrap:wrap}
.spec-chip{
  min-height:38px;padding:7px 14px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line);background:var(--surface-2);color:var(--muted);
  font:inherit;font-size:13px;font-weight:600;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.spec-chip small{font-weight:500;opacity:.75}
.spec-chip:hover{border-color:var(--accent);color:var(--accent-ink)}
.spec-chip.active{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .workspace{grid-template-columns:1fr;gap:22px}
  .sidebar{position:static}
  .filter-group{display:inline-block;vertical-align:top;margin:0 8px 10px 0;min-width:180px}
  .filter-sub{display:none}
  .subjects{grid-template-columns:1fr}
  .hero{padding-top:56px}
  .hero::before{height:300px}
  .content-head{align-items:center}
}
@media(max-width:560px){
  .shell{width:min(100% - 24px,1180px)}
  .brand strong{font-size:13px}
  .brand small{display:none}
  .hero>p{font-size:15px}
  .content-head .btn{display:none}
  .drive-card{align-items:flex-start;flex-direction:column}
  .resource{grid-template-columns:36px minmax(0,1fr)}
  .resource-actions{grid-column:2}
  .preview-actions .btn{display:none}
  .footer{flex-direction:column}
  .stats{gap:8px}
}
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}