/* Header */
        header {
            text-align: center;
            padding: 4rem 0 3rem;
            animation: fadeInDown 0.8s ease-out;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
            font-size: 2.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
        }


        .logo::after {
            content: 'BETA';
            position: absolute;
            top: -8px;
            right: -45px;
            font-size: 0.5rem;
            background: var(--accent-tertiary);
            color: white;
            padding: 0.15rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }

        .logo-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            box-shadow: 0 8px 32px var(--accent-glow);
            position: relative;
            overflow: hidden;
        }

        .logo-icon::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
            animation: shimmer 3s infinite;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
            100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
        }

        h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .subtitle {
            font-size: 1.25rem;
            color: var(--text-secondary);
            font-weight: 300;
        }

        /* ── Info Sections (How to Use / About) ── */
        .info-section {
            margin: 4rem 0 2rem;
        }

        .info-heading {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 2rem;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.25rem;
        }

        .step-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 1.5rem;
            position: relative;
            transition: border-color 0.2s, transform 0.2s;
        }

        .step-card:hover {
            border-color: var(--accent-primary);
            transform: translateY(-3px);
        }

        .step-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-primary);
            opacity: 0.25;
            line-height: 1;
            margin-bottom: 0.75rem;
            font-family: 'JetBrains Mono', monospace;
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .step-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .about-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 2rem;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        .about-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1.5rem;
        }

        .about-tag {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            color: var(--accent-primary);
            font-size: 0.8rem;
            font-weight: 500;
            padding: 0.3rem 0.85rem;
            border-radius: 999px;
        }