:root{--bg:#0b0d12;--bg-soft:#121621;--card:#ffffff0a;--card-border:#ffffff14;--text:#f5f7fb;--muted:#aab3c5;--accent:#7c5cff;--accent-hover:#6d4df0;--success:#2ecc71;--danger:#ff6b6b;--shadow:0 20px 60px #00000059;--radius:20px}*{box-sizing:border-box}html,body{min-height:100%;color:var(--text);background:radial-gradient(circle at 0 0,#7c5cff2e,#0000 30%),radial-gradient(circle at 100% 0,#00c2ff1f,#0000 28%),linear-gradient(#0a0c11 0%,#0b0d12 100%);margin:0;padding:0;font-family:Inter,Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}.page{max-width:1120px;margin:0 auto;padding:32px 20px 80px}.nav{border:1px solid var(--card-border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:var(--shadow);background:#ffffff0a;border-radius:22px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:40px;padding:18px 22px;display:flex}.nav-logo{letter-spacing:.2px;font-size:18px;font-weight:700}.nav-links{flex-wrap:wrap;gap:10px;display:flex}.nav-link{color:var(--muted);border-radius:12px;padding:10px 14px;transition:all .2s}.nav-link:hover{color:var(--text);background:#ffffff0d}.hero{grid-template-columns:1.2fr .8fr;align-items:stretch;gap:24px;display:grid}.hero-card,.card,.form-card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.hero-card{padding:40px}.hero-badge{color:#d9d0ff;background:#7c5cff29;border-radius:999px;margin-bottom:18px;padding:8px 12px;font-size:14px;display:inline-block}.hero h1{margin:0 0 16px;font-size:52px;line-height:1.05}.hero p{color:var(--muted);margin:0;font-size:18px;line-height:1.65}.hero-side{flex-direction:column;justify-content:space-between;padding:28px;display:flex}.hero-stats{grid-template-columns:1fr 1fr;gap:14px;margin-top:22px;display:grid}.stat{background:#ffffff0a;border:1px solid #ffffff0d;border-radius:18px;padding:18px}.stat strong{margin-bottom:6px;font-size:24px;display:block}.stat span{color:var(--muted);font-size:14px}.section{margin-top:32px}.section-title{margin:0 0 18px;font-size:28px}.grid{gap:20px;display:grid}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.card{padding:24px}.card h2,.card h3{margin:0 0 10px}.card p{color:var(--muted);margin:0;line-height:1.6}.actions{flex-wrap:wrap;gap:12px;margin-top:26px;display:flex}.btn,.btn-secondary,.link-btn{cursor:pointer;border:none;border-radius:14px;justify-content:center;align-items:center;min-height:46px;padding:0 18px;transition:all .2s;display:inline-flex}.btn{background:var(--accent);color:#fff;font-weight:600}.btn:hover{background:var(--accent-hover)}.btn-secondary{color:var(--text);border:1px solid var(--card-border);background:#ffffff0d}.btn-secondary:hover{background:#ffffff14}.form-wrap{max-width:520px;margin:0 auto}.form-card{padding:30px}.form-title{margin:0 0 10px;font-size:34px}.form-subtitle{color:var(--muted);margin:0 0 24px}.form{gap:14px;display:grid}.input{border:1px solid var(--card-border);width:100%;min-height:52px;color:var(--text);background:#ffffff0a;border-radius:14px;outline:none;padding:0 16px}.input:focus{border-color:#7c5cffb3;box-shadow:0 0 0 4px #7c5cff24}.message{color:var(--muted);margin-top:16px}.panel{padding:28px}.panel-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.user-meta{color:var(--muted);gap:8px;display:grid}.course-list{gap:18px;margin-top:20px;display:grid}.course-card{background:var(--card);border:1px solid var(--card-border);box-shadow:var(--shadow);border-radius:20px;padding:24px}.course-card h3{margin:0 0 10px;font-size:24px}.course-card p{color:var(--muted);margin:0 0 18px;line-height:1.6}.empty{color:var(--muted)}.back-link{color:var(--muted);margin-bottom:22px;display:inline-block}.back-link:hover{color:var(--text)}.lesson-list{gap:12px;margin-top:18px;display:grid}.lesson-item{border:1px solid var(--card-border);background:#ffffff0a;border-radius:16px;padding:16px 18px}.video-box{border:1px solid var(--card-border);background:#000;border-radius:18px;margin-top:22px;overflow:hidden}.video-box iframe{aspect-ratio:16/9;border:0;width:100%;display:block}@media (max-width:900px){.hero,.grid-3,.grid-2{grid-template-columns:1fr}.hero h1{font-size:38px}.nav{flex-direction:column;align-items:flex-start}}