:root{
  --bg:#f4f7fb;--surface:#ffffff;--surface2:#eef4f8;--ink:#0e2234;--muted:#6b7c8f;--line:#d9e4ec;
  --navy:#081826;--navy2:#0d2536;--cyan:#23c9c0;--blue:#2f7df6;--green:#1ca56b;--amber:#f5ad28;--red:#db4a5d;--purple:#7357e8;
  --shadow:0 18px 50px rgba(20,52,77,.12);--radius:18px;
}
html[data-theme="dark"]{--bg:#07131e;--surface:#0c1d2a;--surface2:#102838;--ink:#edf8fb;--muted:#91a9b8;--line:#1c3a4c;--shadow:0 18px 60px rgba(0,0,0,.3)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}a{color:inherit}.hidden{display:none!important}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:28px;height:74px;padding:0 max(22px,calc((100vw - 1380px)/2));background:color-mix(in srgb,var(--navy) 94%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.08);color:#eefaff}.brand-btn{display:flex;align-items:center;gap:11px;background:none;border:0;color:#fff;padding:0}.brand-logo{width:118px;height:50px;object-fit:contain;object-position:left center}.brand-product{font-size:17px;font-weight:800;letter-spacing:.4px;padding-left:10px;border-left:1px solid rgba(255,255,255,.18)}.desktop-nav{display:flex;align-items:center;gap:7px;flex:1}.desktop-nav button{border:0;background:transparent;color:#c4d4dc;border-radius:10px;padding:10px 13px;font-weight:650}.desktop-nav button:hover,.desktop-nav button.active{background:#11364a;color:#fff}.top-actions{display:flex;align-items:center;gap:9px}.icon-btn,.profile-chip{width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.14);background:#102c3e;color:#fff}.profile-chip{border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));font-weight:800}.select-compact{height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.16);background:#102c3e;color:#fff;padding:0 10px}.primary{border:0;border-radius:12px;background:linear-gradient(135deg,var(--blue),#249ce8);color:#fff;font-weight:800;padding:12px 18px;box-shadow:0 8px 24px rgba(47,125,246,.24)}.primary.small{padding:10px 15px}.secondary{border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);font-weight:750;padding:11px 16px}.danger{background:#ffedf0;color:#b52c40;border-color:#ffd0d7}.ghost{border:0;background:transparent;color:var(--muted);padding:8px 10px}.pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;background:var(--surface2);color:var(--muted);font-size:12px;font-weight:750}.pill.free{color:#0d7d55;background:#e5f8f0}.pill.paid{color:#9c6504;background:#fff4d8}.pill.live{color:#244cc9;background:#e9efff}
#main{min-height:calc(100vh - 74px)}.container{width:min(1380px,calc(100% - 38px));margin:0 auto}.hero{background:radial-gradient(circle at 70% 25%,rgba(45,174,240,.25),transparent 35%),linear-gradient(135deg,#07131e 0%,#0c2639 56%,#0a3344 100%);color:#fff;padding:64px 0 54px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}.hero h1{font-size:clamp(40px,5vw,72px);line-height:1.04;letter-spacing:-2.5px;margin:0 0 18px;max-width:780px}.hero p{font-size:18px;color:#bdd1dc;max-width:700px;margin:0 0 28px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.hero .secondary{background:#0d2a3c;color:#e9f6f8;border-color:#245067}.hero-visual{position:relative;min-height:360px}.orb{position:absolute;border-radius:50%;filter:blur(1px)}.orb.a{width:290px;height:290px;background:linear-gradient(135deg,#2f7df6,#24d0bc);right:50px;top:16px;opacity:.9}.orb.b{width:180px;height:180px;background:#7357e8;right:0;bottom:10px;opacity:.35}.hero-console{position:absolute;inset:42px 20px 20px 30px;border:1px solid rgba(255,255,255,.14);border-radius:24px;background:rgba(6,19,30,.72);box-shadow:0 30px 80px rgba(0,0,0,.35);padding:24px;backdrop-filter:blur(18px)}.hero-console .line{height:12px;border-radius:999px;background:#173b50;margin-bottom:11px}.hero-console .line:nth-child(2){width:72%;background:linear-gradient(90deg,#24d0bc,#2f7df6)}.hero-console .line:nth-child(3){width:54%}.hero-console .mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:26px}.hero-console .mini{height:96px;border-radius:16px;background:#0f2b3d;border:1px solid #23475c;padding:15px}.hero-console .mini b{font-size:24px;display:block;margin-top:14px}.section{padding:42px 0}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section-title h2{font-size:30px;line-height:1.2;margin:0}.section-title p{margin:4px 0 0;color:var(--muted)}.community-grid,.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.community-cover{height:146px;background:linear-gradient(135deg,#0d2d41,#155b73);position:relative}.community-cover::after{content:"";position:absolute;width:160px;height:160px;border-radius:50%;background:rgba(54,224,202,.22);right:-25px;top:-42px}.community-body{padding:18px}.community-body h3{font-size:20px;margin:0 0 6px}.community-body p{color:var(--muted);margin:0 0 16px;min-height:46px}.meta-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px}.course-card{padding:0}.course-thumb{height:138px;background:linear-gradient(135deg,#223e91,#28a6c7);position:relative}.course-thumb::before{content:"▶";position:absolute;display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.9);color:#173e6c;left:50%;top:50%;transform:translate(-50%,-50%);font-weight:900}.course-info{padding:16px}.course-info h3{margin:0 0 6px}.progress{height:8px;border-radius:999px;background:var(--surface2);overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--blue))}.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.feature{padding:18px;border:1px solid var(--line);background:var(--surface);border-radius:16px}.feature strong{display:block;margin:8px 0 4px;font-size:16px}.feature p{margin:0;color:var(--muted);font-size:13px}.feature .ico{font-size:24px}
.page-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:calc(100vh - 74px)}.sidebar{border-right:1px solid var(--line);background:var(--surface);padding:24px 18px;position:sticky;top:74px;height:calc(100vh - 74px);overflow:auto}.sidebar h3{font-size:13px;text-transform:uppercase;letter-spacing:1.1px;color:var(--muted);margin:20px 12px 8px}.sidebar button{width:100%;display:flex;align-items:center;gap:10px;border:0;background:transparent;color:var(--ink);padding:11px 12px;border-radius:10px;text-align:left}.sidebar button:hover,.sidebar button.active{background:var(--surface2);color:var(--blue)}.content{padding:28px 32px;min-width:0}.community-header{display:flex;justify-content:space-between;gap:22px;align-items:flex-start;margin-bottom:22px}.community-header h1{margin:0 0 6px;font-size:34px}.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:20px}.tabs button{border:1px solid var(--line);background:var(--surface);color:var(--muted);padding:9px 13px;border-radius:10px;font-weight:700}.tabs button.active{background:var(--navy);color:#fff;border-color:var(--navy)}.feed-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:18px}.composer{padding:16px;margin-bottom:15px}.composer textarea{width:100%;min-height:86px;resize:vertical;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:12px;padding:12px}.post{padding:18px;margin-bottom:13px}.post-head{display:flex;align-items:center;gap:10px}.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-weight:850}.post h4{margin:0}.post time{font-size:12px;color:var(--muted)}.post-body{white-space:pre-wrap;margin:14px 0}.post-actions{display:flex;gap:8px}.post-actions button{border:0;background:var(--surface2);color:var(--muted);padding:7px 10px;border-radius:9px}.post-actions button.active{color:#c43b55;background:#ffe9ee}.side-card{padding:16px;margin-bottom:14px}.leader-row{display:grid;grid-template-columns:34px 1fr auto;gap:9px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line)}.leader-row:last-child{border:0}.rank{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--surface2);font-weight:850}
.classroom{display:grid;grid-template-columns:300px minmax(0,1fr);gap:18px}.lesson-nav{padding:14px;height:max-content;position:sticky;top:96px}.lesson-nav button{display:block;width:100%;border:0;border-radius:10px;background:transparent;color:var(--ink);padding:11px;text-align:left}.lesson-nav button.active{background:var(--surface2);color:var(--blue)}.lesson{padding:26px}.lesson h2{font-size:30px;margin-top:0}.video-frame{aspect-ratio:16/9;border-radius:18px;background:linear-gradient(135deg,#06141f,#164c68);display:grid;place-items:center;color:#fff;font-size:60px;margin:18px 0}.lesson-content{font-size:16px;line-height:1.8}.complete-box{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);margin-top:28px;padding-top:18px}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.price-card{padding:22px}.price-card.featured{border:2px solid var(--blue);transform:translateY(-4px)}.price{font-size:34px;font-weight:850;margin:12px 0}.price small{font-size:13px;color:var(--muted)}.benefits{padding:0;list-style:none}.benefits li{padding:7px 0;color:var(--muted)}.benefits li::before{content:"✓";color:var(--green);font-weight:900;margin-right:8px}
.admin-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{padding:18px}.metric span{display:block;color:var(--muted);font-size:12px}.metric strong{font-size:29px;display:block;margin-top:4px}.chart{height:180px;display:flex;align-items:end;gap:7px;padding:18px}.bar{flex:1;background:linear-gradient(180deg,var(--blue),var(--cyan));border-radius:8px 8px 2px 2px;min-width:8px}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left}.table th{color:var(--muted);font-size:12px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field label{display:block;font-size:12px;font-weight:750;color:var(--muted);margin-bottom:6px}.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:11px}.field textarea{min-height:110px;resize:vertical}.full{grid-column:1/-1}.toolbar-row{display:flex;gap:8px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:18px}.tag{display:inline-flex;padding:5px 9px;border-radius:999px;background:#eaf2ff;color:#2c60c5;font-size:12px;font-weight:700}.status{font-size:12px;font-weight:800}.status.good{color:var(--green)}.status.warn{color:var(--amber)}.status.bad{color:var(--red)}
.auth-wrap{min-height:calc(100vh - 74px);display:grid;place-items:center;padding:32px;background:radial-gradient(circle at 50% 15%,rgba(47,125,246,.12),transparent 34%)}.auth-card{width:min(460px,100%);padding:26px}.auth-card h2{font-size:28px;margin:0 0 6px}.auth-card p{color:var(--muted)}.auth-card .field{margin:12px 0}.divider{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px;margin:17px 0}.divider::before,.divider::after{content:"";height:1px;background:var(--line);flex:1}.toast{position:fixed;right:22px;bottom:24px;z-index:80;background:#0f2432;color:#fff;padding:12px 16px;border-radius:12px;box-shadow:var(--shadow);opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:none}.modal{border:0;background:transparent;padding:0}.modal::backdrop{background:rgba(4,12,18,.62);backdrop-filter:blur(3px)}.modal-card{position:relative;width:min(620px,92vw);max-height:88vh;overflow:auto;background:var(--surface);color:var(--ink);border-radius:20px;padding:25px;box-shadow:0 30px 90px rgba(0,0,0,.3)}.modal-close{position:absolute;right:14px;top:12px;width:36px;height:36px;border:0;border-radius:50%;background:var(--surface2);color:var(--ink);font-size:22px}
.mobile-nav{display:none}.offline-badge{position:fixed;left:50%;bottom:76px;transform:translateX(-50%);z-index:60;background:#f7c34b;color:#442f00;border-radius:999px;padding:7px 12px;font-size:12px;font-weight:800}
@media(max-width:1000px){.desktop-nav{display:none}.hero-grid{grid-template-columns:1fr}.hero-visual{min-height:260px}.community-grid,.course-grid{grid-template-columns:repeat(2,1fr)}.feature-strip{grid-template-columns:repeat(2,1fr)}.feed-grid{grid-template-columns:1fr}.page-shell{grid-template-columns:220px 1fr}.classroom{grid-template-columns:230px 1fr}.pricing-grid{grid-template-columns:1fr}.admin-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){body{padding-bottom:68px}.topbar{height:62px;padding:0 12px;gap:8px}.brand-logo{width:94px;height:40px}.brand-product{font-size:14px;padding-left:7px}.top-actions{margin-left:auto}.top-actions .select-compact{display:none}.primary.small{padding:9px 11px}.hero{padding:38px 0}.hero h1{font-size:40px}.hero p{font-size:15px}.hero-visual{display:none}.container{width:min(100% - 24px,1380px)}.community-grid,.course-grid,.feature-strip{grid-template-columns:1fr}.page-shell{display:block}.sidebar{display:none}.content{padding:18px 12px}.community-header{display:block}.community-header .primary{margin-top:12px}.classroom{display:block}.lesson-nav{position:static;margin-bottom:12px}.lesson{padding:18px}.admin-grid{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.table-wrap{overflow:auto}.mobile-nav{position:fixed;bottom:0;left:0;right:0;z-index:45;height:68px;display:grid;grid-template-columns:repeat(5,1fr);background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(16px);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.mobile-nav button{border:0;background:transparent;color:var(--muted);display:grid;place-items:center;padding:6px}.mobile-nav button span{font-size:20px;line-height:1}.mobile-nav button small{font-size:10px}.mobile-nav button.active{color:var(--blue)}.modal-card{padding:21px}.top-actions .icon-btn{display:none}}
@media(max-width:420px){.admin-grid{grid-template-columns:1fr}.brand-product{display:none}.topbar{gap:4px}.profile-chip{width:36px;height:36px}.auth-wrap{padding:18px}.community-header h1{font-size:28px}.section{padding:28px 0}}