static/css/style.css

/* TTSFM Web Application Custom Styles */

:root {
    /* Clean Color Palette */
    --primary-color: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #6366f1;
    --secondary-color: #6b7280;
    --secondary-dark: #4b5563;
    --accent-color: #059669;
    --accent-dark: #047857;

    /* Status Colors */
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --info-color: #2563eb;

    /* Clean Neutral Colors */
    --light-color: #ffffff;
    --light-gray: #f9fafb;
    --medium-gray: #6b7280;
    --dark-color: #111827;
    --text-color: #374151;
    --text-muted: #6b7280;

    /* Design System */
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --border-radius-lg: 1rem;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --box-shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
}

/* Global Styles */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Enhanced Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--dark-color);
    letter-spacing: -0.025em;
}

.display-1, .display-2, .display-3, .display-4 {
    font-weight: 800;
    letter-spacing: -0.05em;
}

.lead {
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--text-muted);
    line-height: 1.8;
}

/* Simplified Button Styles */
.btn {
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
    letter-spacing: 0.025em;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    box-shadow: none;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
    border-radius: var(--border-radius);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: var(--border-radius-sm);
}

/* Clean Card Styles */
.card {
    border: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-radius: 16px;
    background: white;
}

.card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.card-body {
    padding: 2rem;
}

/* Clean Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    color: var(--text-color);
    padding: 5rem 0;
    min-height: 75vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #e5e7eb;
}

.min-vh-75 {
    min-height: 75vh;
}

/* Status Indicators */
.status-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #6c757d;
}

.status-online {
    background-color: #28a745;
}

.status-offline {
    background-color: #dc3545;
}

/* Footer */
.footer {
    margin-top: auto;
}

/* Clean Code Blocks */
pre {
    background-color: #f8fafc !important;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.875rem;
}

code {
    color: #374151;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

/* Enhanced Form Styles */
.form-control, .form-select {
    border-radius: 12px;
    border: 2px solid #e5e7eb;
    transition: var(--transition);
    padding: 1rem 1.25rem;
    font-size: 1rem;
    background-color: #ffffff;
    color: var(--text-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    outline: none;
    background-color: #ffffff;
    transform: translateY(-1px);
}

.form-control:hover, .form-select:hover {
    border-color: var(--primary-light);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.form-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.form-check-input {
    border-radius: var(--border-radius-sm);
    border: 2px solid #e2e8f0;
    width: 1.25rem;
    height: 1.25rem;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-check-label {
    color: var(--text-color);
    font-weight: 500;
    margin-left: 0.5rem;
}

/* Enhanced Status Indicators */
.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 8px;
    position: relative;
    animation: statusPulse 2s infinite;
}

.status-indicator::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 50%;
    opacity: 0.3;
    animation: statusRing 2s infinite;
}

.status-online {
    background-color: var(--success-color);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.status-online::before {
    background-color: var(--success-color);
}

.status-offline {
    background-color: var(--danger-color);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.status-offline::before {
    background-color: var(--danger-color);
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes statusRing {
    0% { transform: scale(0.8); opacity: 0.8; }
    100% { transform: scale(1.4); opacity: 0; }
}

/* Enhanced Audio Player */
.audio-player {
    width: 100%;
    margin-top: 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    background: var(--light-color);
    padding: 0.5rem;
}

.audio-player::-webkit-media-controls-panel {
    background-color: var(--light-color);
    border-radius: var(--border-radius-sm);
}

/* Enhanced Sections */
.features-section {
    padding: 6rem 0;
    background: linear-gradient(180deg, #ffffff 0%, var(--light-color) 100%);
}

.stats-section {
    padding: 4rem 0;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="stats-pattern" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23stats-pattern)"/></svg>');
}

.stat-card {
    text-align: center;
    padding: 2rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-label {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 0.95rem;
}

.quick-start-section {
    padding: 6rem 0;
}

.use-cases-section {
    padding: 6rem 0;
    background: var(--light-color);
}

.tech-specs-section {
    padding: 6rem 0;
}

.faq-section {
    padding: 6rem 0;
    background: var(--light-color);
}

.final-cta-section {
    padding: 6rem 0;
    background: var(--gradient-hero);
    color: white;
    position: relative;
    overflow: hidden;
}

.cta-background-animation {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.05) 50%, transparent 70%);
    animation: shimmer 4s ease-in-out infinite;
}

.section-badge {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.3);
}

/* Enhanced Loading States */
.loading-spinner {
    display: none;
}

.loading .loading-spinner {
    display: inline-block;
}

.loading .btn-text {
    display: none;
}

.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: loading-shimmer 1.5s infinite;
}

@keyframes loading-shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Enhanced Code Blocks */
.code-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

.code-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.code-header {
    background: var(--light-gray);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: between;
    align-items: center;
}

.code-header h4 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--dark-color);
}

.code-content {
    padding: 1.5rem;
    background: #f8fafc;
    margin: 0;
    overflow-x: auto;
}

.code-content code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-color);
}

.code-footer {
    padding: 1rem 1.5rem;
    background: white;
    border-top: 1px solid #e2e8f0;
}

.copy-btn {
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
}

/* Enhanced Use Case Cards */
.use-case-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid #e2e8f0;
    height: 100%;
    text-align: center;
}

.use-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
    border-color: rgba(99, 102, 241, 0.2);
}

.use-case-icon {
    width: 4rem;
    height: 4rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.3);
}

.use-case-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.use-case-description {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.use-case-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.use-case-examples .badge {
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
    border-radius: 1rem;
    background: var(--light-gray);
    color: var(--text-color);
    border: 1px solid #e2e8f0;
}

/* Enhanced Tech Spec Cards */
.tech-spec-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid #e2e8f0;
    height: 100%;
}

.tech-spec-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.tech-spec-icon {
    width: 3rem;
    height: 3rem;
    background: var(--gradient-accent);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    margin: 0 auto 1rem;
}

.tech-spec-card h4, .tech-spec-card h5 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.tech-spec-card ul {
    list-style: none;
    padding: 0;
}

.tech-spec-card li {
    padding: 0.5rem 0;
    color: var(--text-color);
    border-bottom: 1px solid #f1f5f9;
}

.tech-spec-card li:last-child {
    border-bottom: none;
}

/* Enhanced Validation Styles */
.badge {
    font-size: 0.75em;
    padding: 0.4em 0.8em;
    border-radius: 1rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

.validation-result {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced Alert Styles */
.alert {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow);
    padding: 1rem 1.5rem;
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
    color: #1e40af;
    border-left: 4px solid var(--info-color);
}

/* Enhanced Accordion */
.accordion-item {
    border: none;
    margin-bottom: 1rem;
    border-radius: var(--border-radius) !important;
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.accordion-button {
    background: white;
    border: none;
    padding: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    border-radius: var(--border-radius) !important;
}

.accordion-button:not(.collapsed) {
    background: var(--light-gray);
    color: var(--primary-color);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    border-color: transparent;
}

.accordion-body {
    padding: 1.5rem;
    background: white;
    color: var(--text-color);
    line-height: 1.7;
}

/* Enhanced CTA Buttons */
.cta-btn-primary, .cta-btn-secondary {
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
}

.cta-btn-primary small, .cta-btn-secondary small {
    font-size: 0.75rem;
    opacity: 0.9;
    font-weight: 400;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-buttons {
    margin: 2rem 0;
}

.cta-stats {
    margin-top: 3rem;
}

.cta-stat h4 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.cta-stat small {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Enhanced Quick Start */
.quick-start-cta {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    box-shadow: var(--box-shadow-lg);
    text-align: center;
    border: 1px solid #e2e8f0;
}

.quick-start-cta h4 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

/* Enhanced Batch Processing */
.batch-chunk-card {
    transition: var(--transition);
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.batch-chunk-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
    border-color: rgba(99, 102, 241, 0.2);
}

.batch-chunk-card .card-body {
    padding: 1.5rem;
}

.batch-chunk-card .card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark-color);
}

.batch-chunk-card .card-text {
    color: var(--text-muted);
    line-height: 1.6;
}

.download-chunk {
    transition: var(--transition-fast);
}

.download-chunk:hover {
    transform: scale(1.1);
}

/* Enhanced Navigation */
.navbar {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
    color: var(--text-color) !important;
    position: relative;
    padding: 0.75rem 1rem !important;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after {
    width: 80%;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

.navbar-text {
    color: var(--text-muted) !important;
    font-weight: 500;
}

/* Enhanced Footer */
.footer {
    background: linear-gradient(135deg, var(--dark-color) 0%, #2d3748 100%);
    color: white;
    padding: 3rem 0 2rem;
    margin-top: 6rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="footer-pattern" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23footer-pattern)"/></svg>');
}

.footer h5 {
    color: white;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer p, .footer a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer a:hover {
    color: white;
    text-decoration: none;
}

/* Enhanced Responsive Design */
@media (max-width: 1200px) {
    .hero-section {
        padding: 4rem 0;
    }

    .floating-icon-container {
        width: 250px;
        height: 250px;
    }

    .floating-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .hero-main-icon {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }
}

@media (max-width: 992px) {
    .hero-section {
        padding: 3rem 0;
        min-height: auto;
    }

    .display-3 {
        font-size: 2.5rem;
    }

    .features-section, .stats-section, .quick-start-section,
    .use-cases-section, .tech-specs-section, .faq-section,
    .final-cta-section {
        padding: 4rem 0;
    }

    .floating-icon-container {
        display: none;
    }

    .hero-visual {
        margin-top: 2rem;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
        text-align: center;
    }

    .display-3 {
        font-size: 2rem;
    }

    .lead {
        font-size: 1rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
        width: 100%;
        margin-bottom: 1rem;
    }

    .hero-stats .col-4 {
        margin-bottom: 1rem;
    }

    .stat-item h3 {
        font-size: 2rem;
    }

    .features-section, .stats-section, .quick-start-section,
    .use-cases-section, .tech-specs-section, .faq-section,
    .final-cta-section {
        padding: 3rem 0;
    }

    .feature-card-enhanced, .use-case-card, .tech-spec-card {
        margin-bottom: 2rem;
    }

    .code-card {
        margin-bottom: 1.5rem;
    }

    .code-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .quick-start-cta {
        padding: 2rem 1rem;
    }

    .cta-buttons .btn {
        width: 100%;
        margin-bottom: 1rem;
    }

    .navbar-nav {
        text-align: center;
        padding: 1rem 0;
    }

    .toc {
        position: static;
        margin-bottom: 2rem;
        max-height: none;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .hero-section {
        padding: 1.5rem 0;
    }

    .display-3 {
        font-size: 1.75rem;
    }

    .card-body {
        padding: 1.5rem;
    }

    .feature-card-enhanced, .use-case-card, .tech-spec-card {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .hero-main-icon {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .pulse-ring {
        width: 100px;
        height: 100px;
    }
}

/* Enhanced Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    outline: 3px solid rgba(99, 102, 241, 0.3);
    outline-offset: 2px;
}

.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip to content link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Enhanced Animation Classes */
.fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scale-in {
    animation: scaleIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Enhanced Utility Classes */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-secondary {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: var(--box-shadow);
}

.shadow-lg-custom {
    box-shadow: var(--box-shadow-lg);
}

.shadow-xl-custom {
    box-shadow: var(--box-shadow-xl);
}

.border-radius-custom {
    border-radius: var(--border-radius);
}

.bg-gradient-primary {
    background: var(--gradient-primary);
}

.bg-gradient-secondary {
    background: var(--gradient-secondary);
}

.bg-gradient-accent {
    background: var(--gradient-accent);
}

/* Enhanced Progress Indicators */
.progress-custom {
    height: 10px;
    border-radius: var(--border-radius-sm);
    background-color: #e2e8f0;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-bar-custom {
    height: 100%;
    background: var(--gradient-primary);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.progress-bar-custom::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: progress-shimmer 2s infinite;
}

@keyframes progress-shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Enhanced Tooltip */
.tooltip-inner {
    background-color: var(--dark-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    box-shadow: var(--box-shadow);
}

/* Enhanced Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--light-gray);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-secondary);
}

::-webkit-scrollbar-corner {
    background: var(--light-gray);
}

/* Print Styles */
@media print {
    .navbar, .footer, .hero-scroll-indicator, .floating-icon-container {
        display: none !important;
    }

    .hero-section {
        background: white !important;
        color: black !important;
        padding: 1rem 0 !important;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }

    .btn {
        border: 1px solid #ddd !important;
        background: white !important;
        color: black !important;
    }
}

/* Playground-Specific Styles */
.playground-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
}

.playground-icon {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    position: relative;
}

.audio-player-container {
    border: 2px solid #e2e8f0;
    transition: var(--transition);
}

.audio-player-container:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.stat-item {
    padding: 1rem;
    text-align: center;
}

.stat-item i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.card-header {
    border-bottom: none;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
}

/* Enhanced Form Controls for Playground */
.playground .form-control,
.playground .form-select {
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    font-size: 1rem;
    transition: var(--transition);
}

.playground .form-control:focus,
.playground .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.playground .btn-group .btn {
    border-radius: var(--border-radius-sm);
}

.playground .btn-group .btn:first-child {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.playground .btn-group .btn:last-child {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* Audio Player Enhancements */
audio::-webkit-media-controls-panel {
    background-color: var(--light-gray);
    border-radius: var(--border-radius-sm);
}

audio::-webkit-media-controls-play-button,
audio::-webkit-media-controls-pause-button {
    background-color: var(--primary-color);
    border-radius: 50%;
}

audio::-webkit-media-controls-timeline {
    background-color: var(--light-gray);
    border-radius: var(--border-radius-sm);
}

audio::-webkit-media-controls-current-time-display,
audio::-webkit-media-controls-time-remaining-display {
    color: var(--text-color);
    font-weight: 500;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .hero-background-animation,
    .floating-icon,
    .pulse-ring,
    .hero-scroll-indicator,
    .playground-icon {
        animation: none !important;
    }
}