:root{--bg:#0b1220;--surface:#111b2f;--surface2:#16243d;--text:#f8fafc;--muted:#9fb0c8;--pri:#3b82f6;--pri2:#60a5fa;--border:rgba(255,255,255,.09);--shadow:0 18px 50px rgba(0,0,0,.28);--radius:18px;--max:1220px}*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;background:linear-gradient(180deg,#0a1222 0,#0d1729 320px,#0b1220 100%);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;min-height:100vh}a{color:inherit}.topbar{height:68px;padding:0 max(18px,calc((100vw - var(--max))/2));display:flex;align-items:center;gap:28px;position:sticky;top:0;z-index:50;background:rgba(8,15,28,.91);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.brand{text-decoration:none;font-weight:900;font-size:1.35rem;letter-spacing:-.04em}.brand-icj{color:#fff}.brand-play{color:var(--pri2);margin-left:4px}.topbar nav{display:flex;gap:20px}.topbar nav a,.user-menu a{color:#c7d2e3;text-decoration:none;font-size:.94rem}.topbar nav a:hover,.user-menu a:hover{color:#fff}.top-actions{margin-left:auto;display:flex;gap:14px;align-items:center}.top-search input{width:190px;background:#0f1b30;border:1px solid var(--border);color:#fff;padding:9px 12px;border-radius:999px;outline:none}.user-menu{display:flex;gap:12px;align-items:center;font-size:.88rem}.user-menu span{max-width:160px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#fff}.container{width:min(var(--max),calc(100% - 36px));margin:auto;padding:30px 0 54px}.hero{min-height:370px;border-radius:26px;position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:46px;margin-bottom:38px;background:linear-gradient(120deg,#123c77,#1a2745);box-shadow:var(--shadow)}.hero.has-image{background-size:cover;background-position:center}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,12,25,.93) 0%,rgba(5,12,25,.67) 48%,rgba(5,12,25,.2) 100%)}.hero-content{position:relative;z-index:2;max-width:650px}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:.75rem;font-weight:800;color:#93c5fd}.hero h1{font-size:clamp(2rem,5vw,4rem);line-height:1;margin:8px 0 14px;letter-spacing:-.05em}.hero p{font-size:1.08rem;color:#d6deea;line-height:1.55}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;background:var(--pri);border:1px solid transparent;color:#fff;text-decoration:none;font-weight:800;border-radius:11px;padding:11px 16px;cursor:pointer}.btn:hover{filter:brightness(1.08)}.btn.secondary{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.13)}.btn.ghost{background:transparent;border-color:var(--border)}.btn.small{padding:8px 12px;font-size:.88rem}.section{margin:0 0 40px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:15px}.section h2{margin:0;font-size:1.4rem;letter-spacing:-.02em}.section-head a{color:#93c5fd;text-decoration:none;font-size:.9rem}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:17px}.course-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;text-decoration:none;min-width:0;transition:.18s transform,.18s border-color,.18s box-shadow}.course-card:hover{transform:translateY(-4px);border-color:rgba(96,165,250,.5);box-shadow:0 16px 36px rgba(0,0,0,.22)}.course-cover{aspect-ratio:16/10;background:linear-gradient(135deg,#1e3a8a,#0f766e);background-size:cover;background-position:center;display:flex;align-items:end;padding:13px}.course-cover .pill{background:rgba(4,10,20,.77);padding:5px 8px;border-radius:999px;font-size:.72rem}.course-body{padding:14px}.course-body h3{margin:0 0 6px;font-size:1.03rem;line-height:1.25}.course-meta{font-size:.82rem;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap}.progress{height:6px;background:#24324a;border-radius:999px;overflow:hidden;margin-top:12px}.progress span{display:block;height:100%;background:#60a5fa;border-radius:inherit}.progress-label{font-size:.76rem;color:#9fb0c8;margin-top:5px}.empty{border:1px dashed var(--border);border-radius:16px;padding:25px;color:var(--muted);background:rgba(255,255,255,.02)}.course-detail{display:grid;grid-template-columns:280px 1fr;gap:36px;align-items:start}.poster{aspect-ratio:4/5;border-radius:20px;background:linear-gradient(135deg,#1d4ed8,#115e59);background-size:cover;background-position:center;box-shadow:var(--shadow)}.course-info h1{font-size:clamp(2rem,4vw,3.5rem);letter-spacing:-.045em;margin:8px 0 12px}.course-description{color:#c1ccdc;line-height:1.65}.stats{display:flex;gap:16px;flex-wrap:wrap;color:#c9d4e4;font-size:.9rem;margin:15px 0}.modules{margin-top:32px}.module{border:1px solid var(--border);border-radius:15px;background:var(--surface);margin-bottom:12px;overflow:hidden}.module h3{margin:0;padding:15px 17px;background:rgba(255,255,255,.025);font-size:1rem}.lesson-list{list-style:none;padding:0;margin:0}.lesson-list li{border-top:1px solid var(--border)}.lesson-list a{display:flex;align-items:center;gap:10px;padding:13px 17px;text-decoration:none;color:#dce5f2}.lesson-list a:hover{background:rgba(255,255,255,.03)}.lesson-state{margin-left:auto;color:#7e91aa;font-size:.82rem}.lesson-state.done{color:#86efac}.lesson-page{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:24px}.player-wrap{aspect-ratio:16/9;background:#000;border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}.player-wrap iframe{width:100%;height:100%;border:0}.lesson-main h1{font-size:1.7rem;margin:20px 0 7px}.lesson-desc{color:var(--muted);line-height:1.6}.sidebar{border:1px solid var(--border);background:var(--surface);border-radius:17px;overflow:hidden;max-height:calc(100vh - 105px);position:sticky;top:90px}.sidebar-title{padding:15px 16px;font-weight:800;border-bottom:1px solid var(--border)}.sidebar .module h3{border-radius:0}.sidebar .module{margin:0;border:0;border-radius:0}.sidebar .lesson-list a.current{background:#1d3b67;color:#fff}.flash{position:fixed;top:82px;left:50%;transform:translateX(-50%);z-index:100;padding:11px 16px;border-radius:10px;background:#14532d;color:#dcfce7;box-shadow:var(--shadow)}.flash.error{background:#7f1d1d;color:#fee2e2}.filterbar{display:flex;gap:10px;margin:10px 0 24px}.filterbar input{flex:1;background:#101b30;border:1px solid var(--border);color:#fff;border-radius:12px;padding:12px 14px}.footer{padding:28px max(18px,calc((100vw - var(--max))/2));border-top:1px solid var(--border);color:#70839c;display:flex;justify-content:space-between;gap:20px;font-size:.85rem}.admin-shell{width:min(1180px,calc(100% - 34px));margin:auto;padding:28px 0 55px}.admin-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.admin-nav{display:flex;gap:10px;flex-wrap:wrap}.panel{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px;margin-bottom:18px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:11px 10px;border-bottom:1px solid var(--border);text-align:left;font-size:.9rem;vertical-align:top}.table th{color:#9fb0c8;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:.84rem;color:#b8c6d8;font-weight:700}.field input,.field textarea,.field select{width:100%;background:#0c1729;border:1px solid var(--border);color:#fff;border-radius:10px;padding:10px 11px;font:inherit}.field textarea{min-height:110px;resize:vertical}.muted{color:var(--muted)}.status-badge{display:inline-block;border:1px solid var(--border);border-radius:999px;padding:4px 8px;font-size:.72rem}.status-badge.published{background:#123b2a;color:#86efac}.row-actions{display:flex;gap:7px;flex-wrap:wrap}.row-actions form{display:inline}.danger{background:#7f1d1d}.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.kpi{padding:18px;border-radius:15px;background:var(--surface);border:1px solid var(--border)}.kpi strong{display:block;font-size:1.8rem}.kpi span{color:var(--muted);font-size:.82rem}.preview-thumb{width:150px;aspect-ratio:16/10;border-radius:10px;background-size:cover;background-position:center;border:1px solid var(--border)}@media(max-width:950px){.cards{grid-template-columns:repeat(2,1fr)}.lesson-page{grid-template-columns:1fr}.sidebar{position:static;max-height:none}.course-detail{grid-template-columns:220px 1fr}.top-search{display:none}.user-menu span{display:none}}@media(max-width:640px){.topbar{height:auto;min-height:62px;padding:10px 14px;gap:12px}.topbar nav{display:none}.container{width:calc(100% - 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