/* roulang page: index */
:root {
            --brand-primary: #00FF87;
            --brand-secondary: #0B0E11;
            --brand-surface: #161B22;
            --brand-surface-elevated: #1F2630;
            --brand-accent: #FF5A36;
            --brand-accent-blue: #60EFFF;
            --text-primary: #E6EDF0;
            --text-secondary: #8B949E;
            --text-muted: #555F6D;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-highlight: rgba(0, 255, 135, 0.25);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --transition-smooth: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        /* Base Reset */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: var(--brand-secondary);
            color: var(--text-primary);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition-smooth);
        }
        a:hover, a:focus {
            color: var(--brand-primary);
        }
        .mono {
            font-family: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
        }

        /* App Shell Layout */
        .app-layout {
            display: flex;
            min-height: 100vh;
            position: relative;
        }

        /* Sidebar Navigation */
        .app-sidebar {
            width: 260px;
            background-color: #0E1217;
            border-right: 1px solid var(--border-subtle);
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 24px 20px;
            transition: transform 0.3s ease;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-subtle);
        }
        .brand-logo-badge {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #00FF87 0%, #0B0E11 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0E11;
            font-weight: 800;
            font-size: 16px;
        }
        .brand-text-title {
            font-size: 17px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #FFFFFF;
        }
        .brand-text-subtitle {
            font-size: 10px;
            color: var(--brand-primary);
            letter-spacing: 0.1em;
        }
        .sidebar-nav {
            margin-top: 30px;
            flex-grow: 1;
        }
        .nav-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .nav-item a {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            border: 1px solid transparent;
        }
        .nav-item.active a,
        .nav-item a:hover {
            background-color: rgba(0, 255, 135, 0.08);
            color: var(--brand-primary);
            border-color: rgba(0, 255, 135, 0.2);
        }
        .sidebar-footer {
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-muted);
        }
        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--brand-primary);
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px var(--brand-primary);
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { opacity: 0.4; }
            50% { opacity: 1; }
            100% { opacity: 0.4; }
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background-color: rgba(11, 14, 17, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-subtle);
            z-index: 1100;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
        }
        .menu-toggle-btn {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            cursor: pointer;
        }

        /* Main Content Container */
        .app-main {
            margin-left: 260px;
            flex-grow: 1;
            width: calc(100% - 260px);
            background-color: var(--brand-secondary);
        }

        /* GEO Style Section Common */
        .geo-section {
            padding: 90px 40px;
            position: relative;
            border-bottom: 1px solid var(--border-subtle);
        }
        .geo-section:nth-child(even) {
            background-color: #0E1217;
        }
        .geo-header {
            margin-bottom: 48px;
        }
        .geo-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 255, 135, 0.08);
            border: 1px solid rgba(0, 255, 135, 0.3);
            color: var(--brand-primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.05em;
        }
        .geo-title {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .geo-subtitle {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 780px;
            line-height: 1.7;
        }

        /* Custom Cards with Roulang Interaction */
        .roulang-card {
            background: rgba(22, 27, 34, 0.7);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 30px;
            transition: var(--transition-smooth);
            position: relative;
            backdrop-filter: blur(12px);
            height: 100%;
        }
        .roulang-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-highlight);
            box-shadow: 0 16px 36px rgba(0, 255, 135, 0.08);
        }
        .roulang-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20px;
            width: 32px;
            height: 2px;
            background: var(--brand-primary);
            border-radius: 2px;
        }

        /* Buttons */
        .btn-brand-primary {
            background-color: var(--brand-primary);
            color: #0B0E11;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .btn-brand-primary:hover {
            background-color: #38ff9f;
            box-shadow: 0 0 20px rgba(0, 255, 135, 0.4);
            color: #0B0E11;
        }
        .btn-brand-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            transition: var(--transition-smooth);
        }
        .btn-brand-outline:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            background: rgba(0, 255, 135, 0.05);
        }

        /* Specific Sections Custom Styling */
        /* Section 1: Hero */
        .hero-section {
            padding: 80px 40px 100px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 255, 135, 0.06) 0%, transparent 60%);
        }
        .hero-h1 {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.04em;
            line-height: 1.25;
            color: #FFFFFF;
            margin-bottom: 24px;
        }
        .hero-lead {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 680px;
        }
        .live-preview-box {
            background: rgba(22, 27, 34, 0.85);
            border: 1px solid var(--border-highlight);
            border-radius: var(--radius-lg);
            padding: 24px;
            position: relative;
        }
        .preview-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-subtle);
            padding-bottom: 14px;
            margin-bottom: 20px;
        }
        .odds-pill {
            background: rgba(255, 255, 255, 0.05);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 13px;
        }

        /* Step Numbers */
        .step-num {
            font-size: 64px;
            font-weight: 800;
            color: var(--brand-primary);
            opacity: 0.85;
            line-height: 1;
            margin-bottom: 16px;
        }

        /* Data Matrix Grid */
        .matrix-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .matrix-table th {
            padding: 16px 20px;
            font-size: 13px;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border-subtle);
            text-transform: uppercase;
        }
        .matrix-table td {
            padding: 18px 20px;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 14px;
        }
        .matrix-table tr:hover td {
            background-color: rgba(255, 255, 255, 0.02);
        }

        /* Form Controls */
        .geo-input {
            width: 100%;
            height: 52px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 0 18px;
            color: #FFFFFF;
            font-size: 15px;
            outline: none;
            transition: var(--transition-smooth);
        }
        .geo-input:focus {
            border-color: var(--brand-primary);
            background: rgba(0, 255, 135, 0.03);
            box-shadow: 0 0 12px rgba(0, 255, 135, 0.2);
        }

        /* Accordion Custom */
        .geo-faq-item {
            background: rgba(22, 27, 34, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .geo-faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 16px;
            user-select: none;
        }
        .geo-faq-answer {
            padding: 0 24px 20px 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            display: none;
        }
        .geo-faq-item.active .geo-faq-answer {
            display: block;
        }
        .geo-faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--brand-primary);
        }
        .faq-arrow {
            transition: var(--transition-smooth);
        }

        /* Footer */
        .app-footer {
            padding: 60px 40px 40px;
            background-color: #07090C;
            border-top: 1px solid var(--border-subtle);
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .app-sidebar {
                transform: translateX(-100%);
            }
            .app-sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .app-main {
                margin-left: 0;
                width: 100%;
                padding-top: 64px;
            }
            .geo-section {
                padding: 60px 20px;
            }
            .hero-section {
                padding: 40px 20px 60px;
            }
            .hero-h1 {
                font-size: 30px;
            }
            .app-footer {
                padding: 40px 20px;
            }
        }