:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-brand svg {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    padding: 80px 0 60px;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

/* Input Section */
.input-section {
    margin-bottom: 3rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 16px;
    transition: all 0.3s;
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.input-icon {
    color: var(--text-muted);
    margin-right: 12px;
    flex-shrink: 0;
}

.url-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    font-family: inherit;
}

.url-input::placeholder {
    color: var(--text-muted);
}

.paste-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    margin-left: 8px;
}

.paste-btn:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}

.download-btn {
    width: 100%;
    background: var(--gradient);
    border: none;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 18px 32px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.download-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.download-btn:active:not(:disabled) {
    transform: translateY(0);
}

.download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-icon {
    transition: transform 0.3s;
}

.download-btn:hover:not(:disabled) .btn-icon {
    transform: translateY(2px);
}

/* Options Section */
.options-section {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}

.option-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: all 0.3s;
}

.option-toggle:hover {
    border-color: var(--primary);
    background: var(--bg-tertiary);
}

.toggle-input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 48px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 24px;
    transition: all 0.3s;
    border: 2px solid var(--border);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--text-muted);
    top: 1px;
    left: 1px;
    transition: all 0.3s;
}

.toggle-input:checked + .toggle-slider {
    background: var(--primary);
    border-color: var(--primary);
}

.toggle-input:checked + .toggle-slider::before {
    transform: translateX(24px);
    background: white;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.toggle-input:checked ~ .toggle-label {
    color: var(--primary);
}

.toggle-label svg {
    width: 18px;
    height: 18px;
}

/* Platform Badges */
.platform-badges {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.platform-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 10px 20px;
    border-radius: 20px;
    border: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Results Section */
.results-section {
    padding: 60px 0;
    background: var(--bg-secondary);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.results-header h2 {
    font-size: 2rem;
    font-weight: 600;
}

.clear-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.clear-btn:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.results-container {
    display: grid;
    gap: 24px;
}

.result-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s;
}

.result-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.2);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 20px;
}

.result-info h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.result-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.result-type {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.result-type.video {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

.result-type.image {
    background: rgba(139, 92, 246, 0.2);
    color: var(--secondary);
}

.result-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.action-btn {
    flex: 1;
    min-width: 150px;
    padding: 12px 20px;
    border: 2px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
}

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

.action-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.video-preview {
    width: 100%;
    max-width: 500px;
    border-radius: 12px;
    margin: 20px 0;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.image-item {
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 1;
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-spinner p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 24px;
    box-shadow: 0 10px 40px var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1001;
    max-width: 400px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .input-wrapper {
        padding: 14px 16px;
    }
    
    .download-btn {
        padding: 16px 24px;
        font-size: 1rem;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .action-btn {
        width: 100%;
    }
}