:root {
            --primary: #1a4b8c;
            --secondary: #f8b739;
            --accent: #2c6e49;
            --light: #f5f5f5;
            --dark: #333;
            --white: #ffffff;
            --bg-color: #ffffff;
            --text-color: #333333;
            --card-bg: #ffffff;
            --sidebar-bg: #f8f9fa;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.6;
            transition: var(--transition);
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        header {
            background: var(--light);
            color: var(--dark);
            padding: 20px 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
        }

        .logo i {
            font-size: 32px;
            margin-right: 10px;
            color: var(--primary);
        }

        .logo h1 {
            font-size: 24px;
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .back-home {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .back-home:hover {
            color: var(--secondary);
            transform: translateX(-3px);
        }

        .theme-toggle {
            background: none;
            border: none;
            cursor: pointer;
            font-size: 20px;
            color: var(--dark);
            transition: var(--transition);
            padding: 8px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover {
            background-color: rgba(0, 0, 0, 0.1);
            transform: rotate(15deg);
        }

        .dark-mode .theme-toggle:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .theme-toggle .fa-sun {
            display: none;
        }

        .dark-mode .theme-toggle .fa-moon {
            display: none;
        }

        .dark-mode .theme-toggle .fa-sun {
            display: block;
            color: var(--secondary);
        }

        /* Main Layout */
        .main-layout {
            display: flex;
            min-height: calc(100vh - 80px);
        }

        /* Sidebar */
        .info-sidebar {
            width: 350px;
            background: var(--sidebar-bg);
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: sticky;
            top: 80px;
            height: calc(100vh - 80px);
            overflow-y: auto;
        }

        .sidebar-header {
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 2px solid var(--primary);
        }

        .sidebar-header h2 {
            color: var(--primary);
            font-size: 24px;
            margin-bottom: 10px;
        }

        .sidebar-header p {
            color: var(--text-color);
            font-size: 14px;
        }

        .topics-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .topic-item {
            margin-bottom: 15px;
            padding: 15px;
            background: var(--card-bg);
            border-radius: 8px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            cursor: pointer;
            display: flex;
            align-items: center;
        }

        .topic-item:hover {
            transform: translateX(5px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }

        .topic-item.selected {
            border-left: 4px solid var(--secondary);
            background: linear-gradient(135deg, var(--card-bg), rgba(248, 183, 57, 0.1));
        }

        .topic-radio {
            margin-right: 15px;
            width: 20px;
            height: 20px;
            accent-color: var(--primary);
            cursor: pointer;
        }

        .topic-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), #0d3a6b);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            margin-right: 15px;
            font-size: 16px;
        }

        .topic-label {
            font-weight: 500;
            color: var(--text-color);
            cursor: pointer;
            flex: 1;
        }

        .sidebar-actions {
            text-align: center;
        }

        .btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            border: 2px solid;
            font-size: 16px;
            text-decoration: none;
            margin: 5px;
        }

        .btn-primary {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background-color: transparent;
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background-color: var(--primary);
            color: white;
        }

        /* Content Area */
        .content-area {
            flex: 1;
            padding: 40px;
            background: var(--bg-color);
        }

        .content-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .content-header h2 {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .content-header h2:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary);
            border-radius: 2px;
        }

        .content-header p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-color);
            font-size: 18px;
        }

        /* Information Display */
        .info-display {
            display: none;
            animation: fadeIn 0.6s ease;
        }

        .info-display.active {
            display: block;
        }

        .selected-topics-header {
            margin-bottom: 30px;
            text-align: center;
        }

        .selected-topics-header h3 {
            color: var(--primary);
            font-size: 28px;
            margin-bottom: 10px;
        }

        .topics-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            margin-bottom: 40px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .topic-card {
            background: var(--card-bg);
            border-radius: 10px;
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-top: 4px solid var(--primary);
        }

        .topic-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }

        .topic-card-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }

        .topic-card-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary), #0d3a6b);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            margin-right: 15px;
            font-size: 20px;
        }

        .topic-card-title {
            font-size: 22px;
            color: var(--primary);
            margin: 0;
        }

        .topic-content {
            color: var(--text-color);
        }

        .topic-content p {
            margin-bottom: 15px;
        }

        .topic-features {
            list-style: none;
            margin: 20px 0;
        }

        .topic-features li {
            margin-bottom: 10px;
            display: flex;
            align-items: flex-start;
        }

        .topic-features i {
            color: var(--accent);
            margin-right: 10px;
            margin-top: 4px;
            font-size: 14px;
        }

        .action-buttons {
            display: flex;
            gap: 10px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .btn-small {
            padding: 8px 16px;
            font-size: 14px;
        }

        /* Detailed Information Sections */
        .detailed-info {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease, padding 0.3s ease;
            background: var(--light);
            border-radius: 8px;
            margin-top: 15px;
        }

        .dark-mode .detailed-info {
            background: #3d3d3d;
        }

        .detailed-info.expanded {
            max-height: 2000px;
            padding: 25px;
            margin-top: 20px;
        }

        .info-section {
            margin-bottom: 25px;
        }

        .info-section:last-child {
            margin-bottom: 0;
        }

        .info-section h4 {
            color: var(--primary);
            font-size: 18px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .info-section h4 i {
            color: var(--secondary);
        }

        .info-section p {
            margin-bottom: 10px;
            line-height: 1.7;
        }

        .program-list {
            list-style: none;
            margin: 15px 0;
        }

        .program-list li {
            margin-bottom: 8px;
            padding-left: 20px;
            position: relative;
        }

        .program-list li:before {
            content: '•';
            color: var(--accent);
            font-weight: bold;
            position: absolute;
            left: 0;
        }

        /* Welcome Screen */
        .welcome-screen {
            text-align: center;
            padding: 60px 20px;
            animation: fadeIn 0.6s ease;
        }

        .welcome-icon {
            font-size: 80px;
            color: var(--primary);
            margin-bottom: 30px;
        }

        .welcome-screen h2 {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .welcome-screen p {
            max-width: 600px;
            margin: 0 auto 30px;
            font-size: 18px;
            color: var(--text-color);
        }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .main-layout {
                flex-direction: column;
            }
            
            .info-sidebar {
                width: 100%;
                height: auto;
                position: relative;
                top: 0;
            }
            
            .content-area {
                padding: 20px;
            }
        }

        @media (max-width: 768px) {
            .topics-grid {
                grid-template-columns: 1fr;
            }
            
            .header-content {
                flex-direction: column;
                text-align: center;
                gap: 15px;
            }
            
            .header-actions {
                justify-content: center;
            }
        }