:root {
            --bg: #F0F7FC;
            --surface: #E3EFF8;
            --text-primary: #0D1B2A;
            --text-secondary: #3D4F5F;
            --divider: #C8D9E6;
            --sky-blue: #4FC3F7;
            --gold: #FFD54F;
            --gold-dark: #FFB300;
            --card-bg: rgba(255, 255, 255, 0.75);
            --card-border: rgba(79, 195, 247, 0.2);
            --shadow: 0 8px 40px rgba(13, 27, 42, 0.08);
            --toggle-bg: #D0E2EF;
            --toggle-icon: #0D1B2A;
            --bg-pattern: url('../images/light-bg.svg');
        }

        [data-theme="dark"] {
            --bg: #0A1628;
            --surface: #122240;
            --text-primary: #F1F1F1;
            --text-secondary: #9CA3AF;
            --divider: #1C3254;
            --sky-blue: #81D4FA;
            --card-bg: rgba(18, 34, 64, 0.7);
            --card-border: rgba(129, 212, 250, 0.15);
            --shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
            --toggle-bg: #1C3254;
            --toggle-icon: #F1F1F1;
            --bg-pattern: url('../images/dark-bg.svg');
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--bg);
            color: var(--text-primary);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            position: relative;
            transition: background-color 0.5s ease, color 0.4s ease;
        }

        /* SVG Pattern Background */
        .pattern-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 0;
            pointer-events: none;
            background-image: var(--bg-pattern);
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            transition: background-image 0.5s ease;
        }

        /* Gradient overlay */
        .gradient-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            pointer-events: none;
            background: radial-gradient(ellipse at 30% 20%, rgba(79, 195, 247, 0.06) 0%, transparent 50%),
                        radial-gradient(ellipse at 70% 80%, rgba(255, 213, 79, 0.04) 0%, transparent 50%);
            transition: opacity 0.5s ease;
        }

        [data-theme="dark"] .gradient-overlay {
            background: radial-gradient(ellipse at 30% 20%, rgba(129, 212, 250, 0.08) 0%, transparent 50%),
                        radial-gradient(ellipse at 70% 80%, rgba(255, 213, 79, 0.06) 0%, transparent 50%);
        }

        /* Theme toggle */
        .theme-toggle {
            position: fixed;
            top: 24px;
            right: 24px;
            z-index: 100;
            background: var(--toggle-bg);
            border: none;
            border-radius: 50%;
            width: 48px;
            height: 48px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }

        .theme-toggle:hover {
            transform: scale(1.1);
        }

        .theme-toggle svg {
            width: 22px;
            height: 22px;
            fill: var(--toggle-icon);
            transition: fill 0.3s ease;
        }

        .sun-icon { display: none; }
        .moon-icon { display: block; }
        [data-theme="dark"] .sun-icon { display: block; }
        [data-theme="dark"] .moon-icon { display: none; }

        /* Main content */
        .content {
            position: relative;
            z-index: 10;
            text-align: center;
            padding: 40px 24px;
            max-width: 680px;
            width: 100%;
        }

        /* Logo area */
        .logo-container {
            margin-bottom: 48px;
            animation: fadeDown 1s ease-out;
        }

        .logo-img {
            width: 120px;
            height: 120px;
            margin: 0 auto 20px;
            display: block;
            border-radius: 24px;
            filter: drop-shadow(0 4px 20px rgba(255, 179, 0, 0.4)) drop-shadow(0 0 40px rgba(255, 213, 79, 0.2));
        }

        .app-name {
            font-family: 'Poppins', sans-serif;
            font-weight: 800;
            font-size: 2.8rem;
            letter-spacing: 6px;
            color: var(--text-primary);
            text-transform: uppercase;
            margin-bottom: 4px;
            transition: color 0.4s ease;
        }

        .gold-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
            margin: 8px auto;
            border-radius: 2px;
        }

        .app-name-ar {
            font-family: 'Tajawal', sans-serif;
            font-weight: 500;
            font-size: 1.6rem;
            color: var(--text-secondary);
            opacity: 0.75;
            direction: rtl;
            transition: color 0.4s ease;
        }

        /* Card */
        .card {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--card-border);
            border-radius: 24px;
            padding: 48px 40px;
            box-shadow: var(--shadow);
            animation: fadeUp 1s ease-out 0.3s both;
            transition: background 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
        }

        .coming-soon {
            font-family: 'Poppins', sans-serif;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 4px;
            text-transform: uppercase;
            color: var(--sky-blue);
            margin-bottom: 16px;
        }

        .tagline {
            font-family: 'Poppins', sans-serif;
            font-weight: 300;
            font-size: 1.25rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
            transition: color 0.4s ease;
        }

        .tagline-ar {
            font-family: 'Tajawal', sans-serif;
            font-weight: 400;
            font-size: 1.15rem;
            color: var(--text-secondary);
            direction: rtl;
            opacity: 0.8;
            margin-bottom: 32px;
            transition: color 0.4s ease;
        }

        .divider {
            width: 100%;
            height: 1px;
            background: var(--divider);
            margin: 28px 0;
            transition: background 0.4s ease;
        }

        .features {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .feature {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 400;
            transition: color 0.4s ease;
        }

        .feature-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .dot-blue { background: var(--sky-blue); }
        .dot-gold { background: var(--gold); }

        /* Notify form */
        .notify-form {
            display: flex;
            gap: 12px;
            max-width: 420px;
            margin: 0 auto;
        }

        .notify-form input {
            flex: 1;
            padding: 14px 20px;
            border: 1px solid var(--divider);
            border-radius: 12px;
            background: var(--surface);
            color: var(--text-primary);
            font-family: 'Poppins', sans-serif;
            font-size: 0.95rem;
            outline: none;
            transition: all 0.3s ease;
        }

        .notify-form input::placeholder {
            color: var(--text-secondary);
            opacity: 0.6;
        }

        .notify-form input:focus {
            border-color: var(--sky-blue);
            box-shadow: 0 0 0 3px rgba(79, 195, 247, 0.15);
        }

        .notify-form button {
            padding: 14px 28px;
            background: linear-gradient(135deg, var(--sky-blue), #039BE5);
            color: white;
            border: none;
            border-radius: 12px;
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .notify-form button:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(79, 195, 247, 0.4);
        }

        /* Footer */
        .footer {
            position: relative;
            z-index: 10;
            margin-top: 48px;
            color: var(--text-secondary);
            font-size: 0.8rem;
            opacity: 0.6;
            animation: fadeUp 1s ease-out 0.6s both;
            transition: color 0.4s ease;
        }

        /* Animations */
        @keyframes fadeDown {
            from { opacity: 0; transform: translateY(-30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Responsive */
        @media (max-width: 600px) {
            .app-name { font-size: 2rem; letter-spacing: 4px; }
            .app-name-ar { font-size: 1.3rem; }
            .card { padding: 32px 24px; }
            .tagline { font-size: 1.05rem; }
            .features { gap: 16px; }
            .notify-form { flex-direction: column; }
            .notify-form button { width: 100%; }
        }