:root{
  --bg:#f7f5f0;--surface:#ffffff;--ink:#14213d;--muted:#5c6475;--line:#e4e0d6;
  --accent:#d1495b;--accent-ink:#ffffff;--gold:#edae49;--teal:#2a9d8f;
  --radius:14px;--max:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,video{display:block;max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* header */
.top{position:sticky;top:0;z-index:10;background:rgba(247,245,240,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo-mark{width:30px;height:30px;border-radius:8px;background:var(--ink);display:grid;place-items:center}
.logo-mark span{display:block;width:12px;height:12px;border-radius:2px;background:linear-gradient(180deg,#000 0 33%,var(--accent) 33% 66%,var(--gold) 66%)}
.nav{display:flex;gap:22px;font-size:15px;color:var(--muted)}
.nav a:hover,.nav a.active{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(.95)}
.btn-ghost{border-color:var(--line);background:var(--surface)}
@media (max-width:720px){.nav{display:none}}

/* hero */
.hero{padding:64px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.08;letter-spacing:-.03em;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{font-size:18px;color:var(--muted);max-width:520px;margin-bottom:26px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:0 20px 50px -30px rgba(20,33,61,.45)}
.hero-card .meta{padding:16px 18px;display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--muted)}
.stats{display:flex;gap:28px;margin-top:30px;font-size:14px;color:var(--muted)}
.stats b{display:block;font-size:24px;color:var(--ink)}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr}}

/* sections */
section{padding:40px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:22px;gap:16px}
.section-head h2{font-size:28px;letter-spacing:-.02em}
.section-head a{color:var(--accent);font-weight:600;font-size:15px}

.levels{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.level{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.level .tag{font-weight:800;font-size:22px}
.level p{font-size:14px;color:var(--muted)}
.level .count{margin-top:10px;font-size:13px;font-weight:600}
@media (max-width:860px){.levels{grid-template-columns:repeat(2,1fr)}}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .15s ease,box-shadow .15s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px -20px rgba(20,33,61,.5)}
.thumb{position:relative;aspect-ratio:16/9;background:#ddd}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb .dur{position:absolute;right:8px;bottom:8px;background:rgba(0,0,0,.75);color:#fff;font-size:12px;padding:2px 7px;border-radius:6px}
.thumb .lvl{position:absolute;left:8px;top:8px;background:var(--surface);font-size:12px;font-weight:700;padding:2px 8px;border-radius:6px}
.card-body{padding:14px 16px 18px}
.card-body h3{font-size:16px;line-height:1.35;margin-bottom:4px}
.card-body p{font-size:14px;color:var(--muted)}

.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.feature h3{font-size:18px;margin-bottom:6px}
.feature p{color:var(--muted);font-size:15px}
@media (max-width:860px){.feature-row{grid-template-columns:1fr}}

/* lesson page */
.lesson{padding:28px 0 40px}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:14px}
.crumbs a:hover{color:var(--ink)}
.lesson-grid{display:grid;grid-template-columns:1fr 320px;gap:28px}
.player{background:#000;border-radius:var(--radius);overflow:hidden;aspect-ratio:16/9}
.player video{width:100%;height:100%}
.lesson h1{font-size:28px;letter-spacing:-.02em;margin:18px 0 6px}
.lesson .sub{color:var(--muted);margin-bottom:22px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:18px}
.panel h2{font-size:18px;margin-bottom:12px}
.vocab{width:100%;border-collapse:collapse;font-size:15px}
.vocab td{padding:8px 0;border-bottom:1px solid var(--line)}
.vocab td:first-child{font-weight:600}
.vocab td:last-child{color:var(--muted);text-align:right}
.side-list a{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.side-list img{width:110px;border-radius:8px;aspect-ratio:16/9;object-fit:cover}
.side-list b{font-size:14px;line-height:1.35}
.side-list span{display:block;font-size:13px;color:var(--muted)}
@media (max-width:900px){.lesson-grid{grid-template-columns:1fr}}

/* plain pages */
.page{padding:48px 0}
.page h1{font-size:36px;letter-spacing:-.02em;margin-bottom:14px}
.page p{color:var(--muted);max-width:680px;margin-bottom:14px;font-size:17px}

footer{border-top:1px solid var(--line);margin-top:40px;padding:30px 0;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer nav{display:flex;gap:18px}