:root {
            /* Dark Mode */
            --bg-primary: #050a08;
            --bg-secondary: #0a1f1a;
            --text-primary: #ffffff;
            --text-secondary: rgba(255, 255, 255, 0.6);
            --accent-color: #4ade80;
            --accent-border: rgba(74, 222, 128, 0.1);
            --accent-border-hover: rgba(74, 222, 128, 0.3);
            --card-bg: rgba(10, 31, 26, 0.4);
            --card-border: rgba(74, 222, 128, 0.1);
            --ad-bg: rgba(10, 25, 20, 0.85);
            --nav-bg: rgba(10, 25, 20, 0.9);
            --nav-item-inactive: rgba(255, 255, 255, 0.35);
            --close-icon: rgba(255, 255, 255, 0.4);
            --transliteration-color: rgba(74, 222, 128, 0.8);
        }

        [data-theme="light"] {
            /* Light Mode */
            --bg-primary: #ffffff;
            --bg-secondary: #ffffff;
            --text-primary: #111824;
            --text-secondary: #4b5563;
            --accent-color: #10b981;
            --accent-border: #d1fae5;
            --accent-border-hover: #a7f3d0;
            --card-bg: #f8fafc;
            --card-border: #e2e8f0;
            --ad-bg: #f9fafb;
            --nav-bg: #ffffff;
            --nav-item-inactive: #6b7280;
            --close-icon: #6b7280;
            --transliteration-color: #065f46;
        }

        html, body {
            height: 100%;
            margin: 0;
            background-color: var(--bg-primary);
            font-family: 'Work Sans', sans-serif;
            color: var(--text-primary);
            transition: background-color 0.3s, color 0.3s;
        }

        .jumbotron-single {
            background: radial-gradient(circle at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            min-height: 100vh;
            margin-bottom: 0 !important;
            padding-top: 40px;
            padding-bottom: 200px !important;
            position: relative;
        }

        /* Remove inherited pseudo-elements */
        .jumbotron-single::before,
        .jumbotron-single::after {
            display: none !important;
        }

        [data-theme="light"] .jumbotron-single {
            background: #ffffff !important;
        }

        .section-title {
            color: var(--accent-color);
            font-size: 14px;
            letter-spacing: 3px;
            text-transform: uppercase;
            margin-bottom: 30px;
            font-weight: 700;
        }

        /* --- New Dropdown Style Only --- */
        .dua-filter-container {
            margin-bottom: 30px;
            display: flex;
            justify-content: center;
        }

        .dua-select {
            background: var(--card-bg);
            color: var(--text-primary);
            border: 1px solid var(--accent-border);
            border-radius: 15px;
            padding: 10px 40px 10px 20px;
            font-size: 14px;
            outline: none;
            cursor: pointer;
            width: 90%;
            max-width: 350px;
            appearance: none;
            -webkit-appearance: none;
            transition: all 0.3s ease;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%234ade80'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 15px center;
            background-size: 20px;
        }

        [data-theme="light"] .dua-select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2310b981'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
        }

        .dua-select:focus {
            border-color: var(--accent-color);
        }
        /* --- End Dropdown Style --- */

        .dua-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 25px;
            padding: 25px;
            margin-bottom: 25px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, border-color 0.3s ease;
            backdrop-filter: none;
            -webkit-backdrop-filter: none;
        }

        [data-theme="dark"] .dua-card {
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .dua-card:hover {
            transform: translateY(-5px);
            border-color: var(--accent-border-hover);
        }

        .dua-category {
            font-size: 10px;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 15px;
            display: block;
        }

        .dua-arabic {
            font-size: 24px;
            line-height: 1.8;
            margin-bottom: 20px;
            font-family: 'Lato', sans-serif;
            color: var(--text-primary);
        }

        .dua-transliteration {
            font-size: 13px;
            color: var(--transliteration-color);
            font-style: italic;
            margin-bottom: 15px;
        }

        .dua-translation {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .bottom-ad-banner {
            position: fixed;
            bottom: 95px; 
            left: 0;
            right: 0;
            margin-left: auto;
            margin-right: auto;
            width: 90%;
            max-width: 400px;
            background: var(--ad-bg);
            border: 1px solid var(--accent-border);
            border-radius: 15px;
            padding: 10px 15px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            z-index: 999;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .ad-content-wrapper {
            display: flex;
            align-items: center;
            text-decoration: none !important;
            flex-grow: 1;
            justify-content: center;
        }
        .bottom-ad-banner img {
            height: 35px;
            border-radius: 4px;
            margin-right: 12px;
        }
        .bottom-ad-banner span {
            font-size: 11px;
            color: var(--accent-color);
            font-weight: 600;
        }
        .close-ad-icon {
            color: var(--close-icon);
            font-size: 16px;
            cursor: pointer;
            padding-left: 10px;
            transition: 0.3s;
        }
        .close-ad-icon:hover { color: #ff4d4d; }

        .bottom-nav {
            position: fixed;
            bottom: 25px;
            left: 50%;
            transform: translateX(-50%);
            width: 90%;
            max-width: 400px;
            background: var(--nav-bg);
            display: flex;
            justify-content: space-around;
            padding: 12px 5px;
            border-radius: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            border: 1px solid var(--accent-border);
        }

        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none !important;
            color: var(--nav-item-inactive);
            transition: 0.3s;
            flex: 1;
        }

        .nav-item i { 
            font-size: 18px; 
            margin-bottom: 4px; 
        }
        .nav-item span { 
            font-size: 8px; 
            font-weight: 600; 
            letter-spacing: 1px; 
            text-transform: uppercase; 
        }
        .nav-item.active { 
            color: var(--accent-color); 
        }
        .nav-item.active i { 
            text-shadow: 0 0 10px rgba(74, 222, 128, 0.4); 
        }

        /* Theme Toggle */
        .theme-toggle {
            position: fixed;
            top: 15px;
            right: 15px;
            z-index: 1001;
            background: var(--nav-bg);
            border: 1px solid var(--accent-border);
            border-radius: 50%;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(0,0,0,0.1);
            transition: all 0.25s ease;
        }

        .theme-toggle:hover {
            transform: scale(1.15);
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
        }

        .theme-toggle i {
            font-size: 16px;
            color: var(--accent-color);
        }

        /* Final safety */
        [data-theme="light"] {
            background: #ffffff !important;
        }
        [data-theme="light"] .container {
            background: transparent !important;
        }