/* ── Nav ──────────────────────────────────────────── */
        nav {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 100;
            padding: 0.9rem 2rem;
            background: rgba(10, 14, 26, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: #e8ecf4;
        }
        .nav-brand img {
            width: 28px;
            height: 28px;
            border-radius: 6px;
        }
        .nav-links { display: flex; gap: 2rem; align-items: center; }
        .nav-links a {
            color: #8b93a7;
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s;
        }
        .nav-links a:hover { color: #e8ecf4; }
        .nav-cta {
            background: #6b8afd;
            color: #fff !important;
            padding: 0.45rem 1.2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.85rem;
            transition: background 0.2s, transform 0.15s;
        }
        .nav-cta:hover { background: #5a7bf0; transform: translateY(-1px); color: #fff !important; }

        /* ── 1. Hero ──────────────────────────────────────── */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding-top: 5rem;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -40%; left: 50%; transform: translateX(-50%);
            width: 900px; height: 900px;
            background: radial-gradient(circle, rgba(107,138,253,0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-icon {
            width: 100px;
            height: 100px;
            border-radius: 22px;
            margin: 0 auto 1.5rem;
            box-shadow: 0 8px 40px rgba(107,138,253,0.3);
        }
        .hero h1 {
            font-size: 4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 0.4rem;
        }
        .hero .tagline {
            font-size: 1.6rem;
            font-weight: 400;
            color: #8b93a7;
            margin-bottom: 1.2rem;
        }
        .hero .subtitle {
            font-size: 1.15rem;
            color: #6b7280;
            max-width: 540px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #6b8afd;
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            padding: 0.85rem 2rem;
            border-radius: 12px;
            transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
        }
        .btn-primary:hover {
            background: #5a7bf0;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(107,138,253,0.35);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: #8b93a7;
            font-size: 1.05rem;
            font-weight: 500;
            padding: 0.85rem 2rem;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 12px;
            transition: border-color 0.2s, color 0.2s;
        }
        .btn-secondary:hover { border-color: rgba(255,255,255,0.25); color: #c8cdd8; }

        .btn-coming-soon {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(120, 120, 130, 0.15);
            color: #c8cdd8;
            font-size: 1.05rem;
            font-weight: 600;
            padding: 0.85rem 2rem;
            border-radius: 12px;
            border: 1px solid rgba(255,255,255,0.12);
            cursor: default;
            user-select: none;
        }
        html[data-theme="light"] .btn-coming-soon {
            background: rgba(60, 70, 90, 0.08);
            color: #4a5568;
            border-color: rgba(60, 70, 90, 0.15);
        }

        .nav-cta-disabled {
            background: rgba(120, 120, 130, 0.18) !important;
            color: #c8cdd8 !important;
            cursor: default;
            user-select: none;
        }
        .nav-cta-disabled:hover {
            background: rgba(120, 120, 130, 0.18) !important;
            transform: none !important;
            color: #c8cdd8 !important;
        }
        html[data-theme="light"] .nav-cta-disabled {
            background: rgba(60, 70, 90, 0.1) !important;
            color: #4a5568 !important;
        }