:root {
            --primary: #405DE6;
            --secondary: #5851DB;
            --accent: #833AB4;
            --gradient: linear-gradient(45deg, var(--primary), var(--accent));
            --text-dark: #262626;
            --text-light: #8e8e8e;
            --bg-light: #fafafa;
            --card-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background-image: radial-gradient(circle at 30% 50%, rgba(64, 93, 230, 0.1) 0%, rgba(255, 255, 255, 0) 50%);
        }
        
        header {
            background: var(--gradient);
            color: white;
            padding: 1.5rem 0;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        
        .logo i {
            font-size: 2rem;
        }
        
        .logo h1 {
            font-size: 1.8rem;
            font-weight: 600;
        }
        
        .tagline {
            font-size: 0.9rem;
            opacity: 0.9;
        }
        
        main {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 2rem;
        }
        
        .container {
            width: 100%;
            max-width: 700px;
            background: white;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .container:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.15);
        }
        
        .input-section {
            padding: 2.5rem;
            background: white;
        }
        
        h2 {
            text-align: center;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
            font-weight: 600;
        }
        
        .input-group {
            display: flex;
            gap: 10px;
            margin-bottom: 1.5rem;
        }
        
        .input-group input {
            flex: 1;
            padding: 15px 20px;
            border: 1px solid #ddd;
            border-radius: 50px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background-color: #f9f9f9;
        }
        
        .input-group input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(64, 93, 230, 0.2);
            background-color: white;
        }
        
        .input-group input::placeholder {
            color: var(--text-light);
        }
        
        .btn {
            padding: 15px 30px;
            background: var(--gradient);
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(64, 93, 230, 0.3);
        }
        
        .btn:active {
            transform: translateY(0);
        }
        
        .result-section {
            padding: 0 2.5rem 2.5rem;
            display: none;
        }
        
        .spinner {
            border: 4px solid rgba(64, 93, 230, 0.1);
            border-left-color: var(--primary);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 2rem auto;
            display: none;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .media-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        
        .thumbnail {
            width: 100%;
            max-width: 300px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }
        
        .thumbnail:hover {
            transform: scale(1.02);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }
        
        .download-options {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            width: 100%;
        }
        
        .download-btn {
            padding: 12px 25px;
            background: var(--gradient);
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        
        .download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(64, 93, 230, 0.3);
        }
        
        .error-message {
            color: #ff4d4f;
            background-color: #fff2f0;
            padding: 15px;
            border-radius: 8px;
            margin-top: 1rem;
            text-align: center;
            border: 1px solid #ffccc7;
        }
        
        .success-message {
            color: #52c41a;
            background-color: #f6ffed;
            padding: 15px;
            border-radius: 8px;
            margin-top: 1rem;
            text-align: center;
            border: 1px solid #b7eb8f;
        }
        
        footer {
            text-align: center;
            padding: 1.5rem;
            color: var(--text-light);
            font-size: 0.9rem;
            background: white;
            border-top: 1px solid #eee;
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            padding: 2rem;
            background: #f9f9f9;
        }
        
        .feature-card {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            text-align: center;
            box-shadow: var(--card-shadow);
            transition: all 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px -10px rgba(0, 0, 0, 0.15);
        }
        
        .feature-icon {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        
        .feature-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .feature-desc {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .input-section, .result-section {
                padding: 1.5rem;
            }
            
            .input-group {
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
                justify-content: center;
            }
        }