/* YouTube Data Viewer - Enhanced Styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #ef4444;
    --primary-hover: #dc2626;
    --secondary-color: #6b7280;
    --background-color: #f9fafb;
    --card-background: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
}

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

/* Card Animations */
.card {
    transition: all 0.3s ease-in-out;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

/* Interest Button Styles */
.interest-btn {
    transition: all 0.2s ease-in-out;
    border: 2px solid transparent;
}

.interest-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.interest-btn.active {
    background-color: var(--primary-color) !important;
    color: white !important;
    border-color: var(--primary-hover);
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Line Clamp for Text Truncation */
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Responsive Design Improvements */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .card {
        margin-bottom: 1rem;
    }

    .interest-btn {
        margin-bottom: 0.5rem;
        font-size: 0.875rem;
    }
}

/* Focus States for Accessibility */
button:focus,
select:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Logo Hover Effect */
.logo-link:hover {
    opacity: 0.8;
    transform: scale(1.05);
    transition: all 0.2s ease-in-out;
}

/* Error and Success States */
.error-state {
    background-color: #fef2f2;
    border-color: #fecaca;
    color: #dc2626;
}

.success-state {
    background-color: #f0fdf4;
    border-color: #bbf7d0;
    color: #16a34a;
}

/* AdSense Compliance - Ad Placeholder Styles */
.ad-container {
    background-color: #f8f9fa;
    border: 1px dashed #dee2e6;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    color: #6c757d;
    margin: 20px 0;
}

.ad-container::before {
    content: "Advertisement";
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }

    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}