:root{
  --ink:#18202a;--muted:#657181;--paper:#fbfaf7;--surface:#fff;--line:#e6e2db;
  --accent:#1f5f73;--accent-2:#d58a3b;--soft:#eef5f5;--dark:#17262c;
  --shadow:0 12px 32px rgba(23,38,44,.08);--radius:18px;--max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}
a{color:inherit}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,250,247,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand-mark{width:42px;height:42px;border-radius:12px;background:var(--dark);color:#fff;display:grid;place-items:center;font-weight:800;letter-spacing:-.05em}
.brand strong{display:block;font-size:.94rem}
.brand small{display:block;color:var(--muted);font-size:.72rem}
.main-nav{display:flex;gap:22px;align-items:center}
.main-nav a{text-decoration:none;color:#3c4651;font-size:.9rem;font-weight:650}
.main-nav a:hover{color:var(--accent)}
.nav-toggle{display:none;border:0;background:none;font-size:1.4rem}
.hero{padding:82px 0 70px;background:linear-gradient(135deg,#f7f3eb 0%,#eef5f5 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:54px;align-items:center}
.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.13em;font-size:.7rem;font-weight:800;color:var(--accent);margin-bottom:10px}
.hero h1{font-size:clamp(3rem,7vw,5.7rem);line-height:.95;letter-spacing:-.065em;margin:0 0 24px}
.hero h1 span{color:var(--accent)}
.hero-lead{max-width:650px;font-size:1.18rem;color:#53606b}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{border:0;border-radius:12px;padding:12px 18px;font:inherit;font-weight:750;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn-primary{background:var(--dark);color:#fff}
.btn-primary:hover{background:#27434b}
.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}
.hero-panel{background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.9);border-radius:24px;padding:28px;box-shadow:var(--shadow)}
.search-box label{display:block;font-weight:800;margin-bottom:10px}
.search-row{display:flex;gap:8px}
input,select{width:100%;border:1px solid #d9d6cf;background:#fff;border-radius:11px;padding:12px 13px;font:inherit;color:var(--ink);outline:none}
input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(31,95,115,.1)}
.search-row input{flex:1}.search-row .btn{white-space:nowrap}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}
.hero-stats strong{display:block;font-size:1.65rem}.hero-stats span{display:block;color:var(--muted);font-size:.75rem}
.section{padding:76px 0}.section-muted{background:#f2f4f3}.section-dark{background:var(--dark);color:#fff}
.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:28px}
.section-heading h2{font-size:clamp(1.9rem,4vw,3rem);letter-spacing:-.045em;line-height:1.05;margin:0}
.section-heading.light .eyebrow{color:#b9d6d7}.section-description{color:var(--muted);margin:10px 0 0}
.text-link{color:var(--accent);font-weight:750;text-decoration:none}
.three-points{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.three-points article{display:flex;gap:16px;padding:22px;border:1px solid var(--line);background:#fff;border-radius:var(--radius)}
.point-icon,.tool-card>span{font-size:.72rem;font-weight:850;color:var(--accent);letter-spacing:.1em}
.three-points h3{margin:0 0 5px}.three-points p{margin:0;color:var(--muted);font-size:.9rem}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.resource-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;min-height:275px;box-shadow:0 5px 18px rgba(23,38,44,.035)}
.resource-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);transition:.2s}
.card-top{display:flex;justify-content:space-between;gap:12px;align-items:start}
.badge{display:inline-flex;align-items:center;background:var(--soft);color:var(--accent);border-radius:999px;padding:5px 9px;font-size:.67rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em}
.star{font-size:.85rem;color:var(--accent-2);font-weight:900}
.resource-card h3{font-size:1.08rem;line-height:1.25;margin:14px 0 5px;letter-spacing:-.015em}
.subtitle{color:#68747e;font-size:.82rem;margin:0 0 12px}
.summary{color:#4f5b65;font-size:.88rem;margin:0}
.card-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.meta-chip{border:1px solid var(--line);border-radius:999px;padding:4px 8px;font-size:.67rem;color:#5e6972;background:#fff}
.card-bottom{margin-top:auto;padding-top:18px;display:flex;justify-content:space-between;align-items:end;gap:10px}
.provider{font-size:.75rem;color:var(--muted)}
.open-link{font-weight:800;color:var(--accent);text-decoration:none;white-space:nowrap}
.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.subject-card{padding:18px;background:#fff;border:1px solid var(--line);border-radius:14px;text-align:left;cursor:pointer}
.subject-card:hover{border-color:#b9d2d4;background:#fbffff}
.subject-card strong{display:block;font-size:.92rem}.subject-card span{color:var(--muted);font-size:.76rem}
.semester-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.semester-card{padding:24px 18px;border:1px solid var(--line);border-radius:16px;background:#fff;cursor:pointer}
.semester-card strong{font-size:1rem}.semester-card span{display:block;color:var(--muted);font-size:.8rem;margin-top:4px}
.collection-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.collection-card{padding:24px;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:rgba(255,255,255,.055)}
.collection-card h3{margin:8px 0 8px;font-size:1.15rem}.collection-card p{color:#c7d1d2;font-size:.88rem;margin:0 0 18px}.collection-card button{background:#fff;color:var(--dark)}
.toolkit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tool-card{padding:26px;border:1px solid var(--line);border-radius:18px;background:#fff}
.tool-card h3{margin:9px 0 8px}.tool-card p{color:var(--muted);font-size:.88rem;min-height:72px}
.tool-filter{border:1px solid var(--line);background:#fafaf8;border-radius:999px;padding:7px 10px;margin:3px 4px 0 0;font:inherit;font-size:.72rem;font-weight:750;cursor:pointer}
.filters{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:8px;margin-bottom:14px}
.result-bar{display:flex;justify-content:space-between;color:var(--muted);font-size:.78rem;margin-bottom:16px}
.empty-state{text-align:center;padding:60px 20px;color:var(--muted)}
.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px}.about-grid h2{font-size:clamp(2rem,4vw,3.3rem);line-height:1.05;letter-spacing:-.05em;margin:0}
.about-grid p{color:#53606b}.note-box{padding:16px 18px;background:#fff8eb;border-left:4px solid var(--accent-2);border-radius:10px;margin:22px 0;font-size:.88rem;color:#5c5145}
.site-footer{background:#101b20;color:#d9e1e1;padding:42px 0}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer-grid p{color:#9daeb0;font-size:.82rem;max-width:520px}.footer-grid a{display:block;color:#d9e1e1;text-decoration:none;margin:5px 0;font-size:.85rem}
.toast{position:fixed;right:20px;bottom:20px;background:var(--dark);color:#fff;padding:12px 16px;border-radius:12px;box-shadow:var(--shadow);opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s;z-index:100}
.toast.show{opacity:1;transform:none}
@media(max-width:950px){
  .main-nav{display:none;position:absolute;top:76px;left:0;right:0;background:var(--paper);padding:16px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}
  .main-nav.open{display:flex}.nav-toggle{display:block}
  .hero-grid,.about-grid{grid-template-columns:1fr}.resource-grid{grid-template-columns:repeat(2,1fr)}
  .subject-grid{grid-template-columns:repeat(3,1fr)}.semester-grid{grid-template-columns:repeat(3,1fr)}
  .toolkit-grid,.collection-grid,.three-points{grid-template-columns:1fr}
  .filters{grid-template-columns:1fr 1fr}.filters input{grid-column:1/-1}
}
@media(max-width:620px){
  .container{width:min(var(--max),calc(100% - 24px))}.hero{padding:56px 0}.section{padding:56px 0}
  .hero h1{font-size:3.2rem}.search-row{flex-direction:column}.hero-stats{gap:7px}
  .resource-grid,.subject-grid,.semester-grid{grid-template-columns:1fr}
  .filters{grid-template-columns:1fr}.filters input{grid-column:auto}
  .section-heading{align-items:start;flex-direction:column;gap:10px}.footer-grid{flex-direction:column}
}