*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:#0a0a1a;color:#e2e8f0;line-height:1.6;overflow-x:hidden}

    ::-webkit-scrollbar{width:6px}
    ::-webkit-scrollbar-track{background:#0a0a1a}
    ::-webkit-scrollbar-thumb{background:#334155;border-radius:3px}
    ::-webkit-scrollbar-thumb:hover{background:#475569}

    .bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(99,102,241,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(99,102,241,.03) 1px,transparent 1px);background-size:60px 60px}
    .bg-glow{position:fixed;top:-30vh;right:-20vw;width:80vw;height:80vh;background:radial-gradient(circle,rgba(99,102,241,.12),transparent 70%);pointer-events:none;z-index:0}
    .bg-glow-2{bottom:-30vh;left:-20vw;width:80vw;height:80vh;background:radial-gradient(circle,rgba(16,185,129,.08),transparent 70%);position:fixed;pointer-events:none;z-index:0}

    .container{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

    /* ── Nav ── */
    nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid rgba(99,102,241,.15);margin-bottom:40px}
    .nav-brand{display:flex;align-items:center;gap:12px;text-decoration:none}
    .nav-logo{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#6366f1,#8b5cf6);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;color:#fff;box-shadow:0 4px 16px rgba(99,102,241,.3)}
    .nav-title{font-size:18px;font-weight:700;color:#f1f5f9}
    .nav-title span{color:#818cf8}
    .nav-right{display:flex;align-items:center;gap:12px}
    .lang-btn{background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.25);color:#c7d2fe;padding:8px 16px;border-radius:10px;cursor:pointer;font-size:13px;font-weight:500;transition:all .25s;display:flex;align-items:center;gap:6px;font-family:'Inter',sans-serif}
    .lang-btn:hover{background:rgba(99,102,241,.2);border-color:rgba(99,102,241,.4);color:#e0e7ff}
    .lang-menu{display:none;position:absolute;top:calc(100% + 6px);right:0;background:#1e1b4b;border:1px solid rgba(99,102,241,.25);border-radius:12px;box-shadow:0 12px 40px rgba(0,0,0,.4);z-index:100;min-width:150px;padding:6px;overflow:hidden}
    .lang-menu.show{display:block}
    .lang-menu a{display:block;padding:10px 16px;text-decoration:none;color:#c7d2fe;font-size:13px;border-radius:8px;transition:all .2s}
    .lang-menu a:hover{background:rgba(99,102,241,.15);color:#e0e7ff}
    .lang-menu a.active{background:rgba(99,102,241,.2);color:#a5b4fc;font-weight:600}
    .version-badge{background:rgba(16,185,129,.12);color:#34d399;font-size:11px;font-weight:600;padding:4px 10px;border-radius:20px;letter-spacing:.3px}

    /* ── Hero ── */
    .hero{text-align:center;padding:60px 0 40px;position:relative}
    .hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.2);color:#a5b4fc;padding:6px 16px;border-radius:20px;font-size:12px;font-weight:600;margin-bottom:24px;letter-spacing:.3px}
    .hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;background:linear-gradient(135deg,#f1f5f9,#a5b4fc,#6366f1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px;line-height:1.2}
    .hero p{font-size:18px;color:#94a3b8;max-width:600px;margin:0 auto 32px}
    .hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;font-family:'Inter',sans-serif;border:none}
    .btn-primary{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;box-shadow:0 4px 20px rgba(99,102,241,.3)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(99,102,241,.4)}
    .btn-ghost{background:rgba(255,255,255,.05);color:#c7d2fe;border:1px solid rgba(255,255,255,.1)}
    .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2)}

    /* ── Section ── */
    .section{margin-bottom:48px}
    .section-header{text-align:center;margin-bottom:36px}
    .section-header h2{font-size:26px;font-weight:700;color:#f1f5f9;margin-bottom:8px}
    .section-header p{color:#64748b;font-size:15px;max-width:500px;margin:0 auto}

    /* ── Notification Banner (conditional demo) ── */
    {{if .ShowWelcome}}
    .notification-bar{display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,rgba(99,102,241,.12),rgba(139,92,246,.08));border:1px solid rgba(99,102,241,.2);border-radius:14px;padding:16px 20px;margin-bottom:32px;animation:fadeSlide .6s ease}
    .notification-bar .icon{font-size:20px}
    .notification-bar .text{font-size:14px;color:#c7d2fe;flex:1}
    .notification-bar .close-btn{background:none;border:none;color:#64748b;cursor:pointer;font-size:18px;padding:4px;border-radius:6px;transition:color .2s}
    .notification-bar .close-btn:hover{color:#f1f5f9}
    {{end}}

    /* ── Stats Grid (range demo) ── */
    .stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:48px}
    .stat-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:24px;text-align:center;transition:all .3s;position:relative;overflow:hidden}
    .stat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:16px 16px 0 0;opacity:.6}
    .stat-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}
    .stat-value{font-size:32px;font-weight:800;margin-bottom:4px}
    .stat-label{font-size:13px;color:#64748b;font-weight:500}

    /* ── Features Grid (range demo) ── */
    .feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
    .feat-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:24px;transition:all .3s;position:relative;overflow:hidden}
    .feat-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.06);border-color:rgba(99,102,241,.2);box-shadow:0 8px 32px rgba(99,102,241,.08)}
    .feat-icon{font-size:36px;margin-bottom:12px}
    .feat-tag{display:inline-block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;padding:3px 10px;border-radius:20px;margin-bottom:10px}
    .feat-tag.core{background:rgba(99,102,241,.15);color:#a5b4fc}
    .feat-tag.basic{background:rgba(16,185,129,.12);color:#34d399}
    .feat-tag.adv{background:rgba(245,158,11,.12);color:#fbbf24}
    .feat-card h3{font-size:16px;font-weight:600;color:#f1f5f9;margin-bottom:6px}
    .feat-card p{font-size:13px;color:#64748b;line-height:1.6}

    /* ── Code Examples (range demo) ── */
    .code-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px}
    .code-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:16px;overflow:hidden;transition:all .3s}
    .code-card:hover{transform:translateY(-4px);border-color:rgba(99,102,241,.2);box-shadow:0 8px 32px rgba(99,102,241,.08)}
    .code-header{display:flex;align-items:center;gap:8px;padding:14px 20px;border-bottom:1px solid rgba(255,255,255,.05);font-size:13px;font-weight:600;color:#94a3b8}
    .code-header .icon{font-size:18px}
    .code-body{padding:16px 20px}
    .code-block{background:rgba(0,0,0,.3);border-radius:10px;padding:14px 16px;font-family:'JetBrains Mono','Fira Code',monospace;font-size:13px;line-height:1.7;color:#a5b4fc;overflow-x:auto;margin-bottom:12px}
    .code-block .result{color:#34d399}
    .code-block .keyword{color:#f472b6}
    .code-block .string{color:#fbbf24}
    .code-result{font-size:13px;color:#64748b;padding:10px 14px;background:rgba(16,185,129,.06);border-radius:8px;border-left:3px solid rgba(16,185,129,.3)}

    /* ── Interactive Demo ── */
    .interactive-card{background:linear-gradient(135deg,rgba(99,102,241,.06),rgba(139,92,246,.04));border:1px solid rgba(99,102,241,.15);border-radius:20px;padding:32px;margin-top:8px}
    .interactive-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    @media(max-width:768px){.interactive-grid{grid-template-columns:1fr}}
    .interactive-panel{background:rgba(0,0,0,.2);border-radius:14px;padding:20px;border:1px solid rgba(255,255,255,.05)}
    .panel-title{font-size:14px;font-weight:600;color:#94a3b8;margin-bottom:12px;display:flex;align-items:center;gap:8px}
    .demo-greeting{background:linear-gradient(135deg,rgba(99,102,241,.1),rgba(139,92,246,.08));border-radius:12px;padding:20px;font-size:18px;font-weight:600;color:#c7d2fe;text-align:center;border:1px solid rgba(99,102,241,.1)}
    .lang-current-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.2);color:#a5b4fc;padding:6px 14px;border-radius:10px;font-size:13px;font-weight:500}
    .lang-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
    .lang-actions a{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:10px;font-size:13px;font-weight:500;text-decoration:none;transition:all .25s;border:1px solid rgba(255,255,255,.08);color:#94a3b8;background:rgba(255,255,255,.03)}
    .lang-actions a:hover{background:rgba(99,102,241,.15);border-color:rgba(99,102,241,.25);color:#c7d2fe}
    .lang-actions a.active{background:rgba(99,102,241,.2);border-color:rgba(99,102,241,.3);color:#a5b4fc}

    /* ── API Demo ── */
    .api-response{background:rgba(0,0,0,.3);border-radius:12px;padding:16px;font-family:'JetBrains Mono','Fira Code',monospace;font-size:13px;line-height:1.7;margin-top:12px;min-height:80px;color:#94a3b8;overflow-x:auto;white-space:pre-wrap;display:none;border:1px solid rgba(255,255,255,.05)}
    .api-response.show{display:block}
    .api-response .key{color:#f472b6}
    .api-response .val{color:#34d399}
    .api-response .str{color:#fbbf24}

    /* ── Template code preview ── */
    .template-preview{background:rgba(0,0,0,.25);border-radius:12px;padding:16px;font-family:'JetBrains Mono','Fira Code',monospace;font-size:12px;line-height:1.8;overflow-x:auto;border:1px solid rgba(255,255,255,.05);margin-top:16px}
    .template-preview .comment{color:#64748b}
    .template-preview .directive{color:#a5b4fc}
    .template-preview .string{color:#fbbf24}
    .template-preview .var{color:#34d399}

    /* ── Condition Preview ── */
    .condition-box{padding:16px 20px;border-radius:12px;font-size:14px;font-weight:500}
    .condition-box.dev{background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.2);color:#34d399}
    .condition-box.prod{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);color:#f87171}

    /* ── Footer ── */
    footer{text-align:center;padding:40px 0 32px;border-top:1px solid rgba(255,255,255,.05);color:#475569;font-size:13px}

    /* ── Animations ── */
    @keyframes fadeSlide{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}
    @keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
    .anim-fade{animation:fadeUp .6s ease forwards;opacity:0}
    .anim-fade-d1{animation-delay:.1s}
    .anim-fade-d2{animation-delay:.2s}
    .anim-fade-d3{animation-delay:.3s}
    .anim-fade-d4{animation-delay:.4s}

    /* ── Responsive ── */
    @media(max-width:640px){.hero h1{font-size:28px}.hero-actions{flex-direction:column;align-items:center}}