/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #FAFAFA;
    --bg-card: #FFFFFF;
    --bg-dark: #1A1A1A;
    --primary: #1A1A1A;
    --secondary: #4B5563;
    --muted: #9CA3AF;
    --accent: #4F46E5;
    --accent-hover: #4338CA;
    --accent-light: #EEF2FF;
    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;
    --border: #E5E7EB;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.nav-link-premium {
    background: var(--accent);
    color: white !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.nav-link-premium:hover {
    background: var(--accent-hover);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: 0.3s;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    z-index: 99;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mobile-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary);
    text-decoration: none;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.mobile-link-premium {
    color: var(--accent) !important;
    font-weight: 600;
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--secondary);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Converter Box */
.converter-box {
    max-width: 700px;
    margin: 0 auto 32px;
    background: var(--bg-card);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.input-container {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.url-input {
    flex: 1;
    padding: 16px 20px;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.url-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.fetch-btn {
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.fetch-btn:hover {
    background: var(--accent-hover);
}

.fetch-btn:active {
    transform: scale(0.98);
}

.fetch-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-loader {
    display: flex;
    align-items: center;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Options Bar */
.options-bar {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.option-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.option-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.toggle-group {
    display: flex;
    gap: 4px;
    background: var(--bg);
    padding: 4px;
    border-radius: var(--radius-sm);
}

.toggle-btn {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    background: transparent;
    color: var(--secondary);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-btn:hover {
    color: var(--primary);
}

.toggle-btn.active {
    background: var(--accent);
    color: white;
}

/* Platforms */
.platforms {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    color: var(--muted);
    font-size: 0.875rem;
    flex-wrap: wrap;
}

.platform-label {
    font-weight: 500;
}

.platform-icons {
    display: flex;
    gap: 16px;
}

.platform-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--secondary);
}

.platform-item svg {
    width: 20px;
    height: 20px;
}

/* Results Section */
.results-section {
    padding: 40px 0;
    animation: fadeIn 0.3s ease;
}

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

.result-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.cover-art {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: var(--border);
}

.result-info {
    flex: 1;
}

.result-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.result-meta {
    font-size: 0.875rem;
    color: var(--secondary);
}

.download-all-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    background: var(--success);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    white-space: nowrap;
}

.download-all-btn:hover {
    background: #059669;
}

.download-all-btn:active {
    transform: scale(0.98);
}

.download-all-btn svg {
    width: 18px;
    height: 18px;
}

/* Track List */
.track-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.track-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.track-item:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.track-number {
    width: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted);
    text-align: center;
}

.track-info {
    flex: 1;
    min-width: 0;
}

.track-name {
    font-weight: 500;
    color: var(--primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    font-size: 0.875rem;
    color: var(--secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-duration {
    font-size: 0.875rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.track-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--secondary);
}

.track-download-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.track-download-btn svg {
    width: 18px;
    height: 18px;
}

.track-download-btn.downloading {
    pointer-events: none;
}

.track-download-btn.completed {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* Section Styles */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--secondary);
    text-align: center;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: var(--bg-card);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--bg);
    border-radius: var(--radius);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-light);
    border-radius: var(--radius);
    color: var(--accent);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary);
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--secondary);
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works-section {
    padding: 80px 0;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.step {
    display: flex;
    align-items: center;
    gap: 48px;
}

.step-reverse {
    flex-direction: row-reverse;
}

.step-number {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary);
}

.step-desc {
    font-size: 1rem;
    color: var(--secondary);
    line-height: 1.6;
}

.step-image {
    flex: 1;
}

.step-placeholder {
    width: 100%;
    aspect-ratio: 16/10;
    background: var(--bg-card);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
}

.step-placeholder svg {
    width: 64px;
    height: 64px;
}

/* Comparison Section */
.comparison-section {
    padding: 80px 0;
    background: var(--bg-card);
}

.comparison-table {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.comparison-column {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
}

.comparison-premium {
    background: var(--primary);
    color: white;
}

.comparison-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 20px;
}

.comparison-header {
    text-align: center;
    padding-bottom: 24px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.comparison-premium .comparison-header {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.comparison-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.comparison-price {
    font-size: 2.5rem;
    font-weight: 700;
}

.comparison-price span {
    font-size: 1rem;
    font-weight: 400;
    opacity: 0.7;
}

.comparison-features {
    list-style: none;
    margin-bottom: 32px;
}

.comparison-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 0.875rem;
}

.comparison-features li svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--success);
}

.comparison-premium .comparison-features li svg {
    color: #34D399;
}

.comparison-disabled {
    opacity: 0.5;
}

.comparison-disabled svg {
    color: var(--muted) !important;
}

.comparison-btn {
    display: block;
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.comparison-btn-free {
    background: var(--bg-card);
    color: var(--primary);
    border: 2px solid var(--border);
}

.comparison-btn-free:hover {
    background: var(--border);
}

.comparison-btn-premium {
    background: var(--accent);
    color: white;
}

.comparison-btn-premium:hover {
    background: var(--accent-hover);
}

/* FAQ Section */
.faq-section {
    padding: 80px 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    text-align: left;
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    transition: color 0.2s;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--muted);
    transition: transform 0.3s;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding-bottom: 20px;
    color: var(--secondary);
    line-height: 1.7;
}

.faq-more {
    text-align: center;
    margin-top: 40px;
}

.btn-secondary {
    display: inline-block;
    padding: 12px 32px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    border: 2px solid var(--accent);
    border-radius: var(--radius-sm);
    transition: background 0.2s, color 0.2s;
}

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

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: var(--primary);
    text-align: center;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

.cta-btn {
    display: inline-block;
    padding: 16px 40px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    background: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background 0.2s, transform 0.1s;
}

.cta-btn:hover {
    background: var(--bg);
    transform: translateY(-2px);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.modal-content {
    width: 100%;
    max-width: 500px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.close-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--muted);
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s;
}

.close-btn:hover {
    background: var(--bg);
}

.progress-container {
    padding: 24px;
}

.progress-bar {
    height: 8px;
    background: var(--bg);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--secondary);
    text-align: center;
}

.download-log {
    max-height: 200px;
    overflow-y: auto;
    padding: 0 24px 24px;
}

.log-entry {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.875rem;
    color: var(--secondary);
    border-bottom: 1px solid var(--border);
}

.log-entry:last-child {
    border-bottom: none;
}

.log-entry.success {
    color: var(--success);
}

.log-entry.error {
    color: var(--error);
}

/* Footer */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.875rem;
    color: var(--secondary);
    line-height: 1.6;
}

.footer-links-group h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    color: var(--primary);
}

.footer-links-group ul {
    list-style: none;
}

.footer-links-group li {
    margin-bottom: 12px;
}

.footer-links-group a {
    font-size: 0.875rem;
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links-group a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 8px;
}

.footer-disclaimer {
    font-size: 0.75rem;
    color: var(--muted);
}

/* Page Header (for sub-pages) */
.page-header {
    padding: 60px 0;
    background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg) 100%);
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--primary);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Content Section (for sub-pages) */
.content-section {
    padding: 60px 0;
}

.content-section .container {
    max-width: 800px;
}

.content-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 32px 0 16px;
    color: var(--primary);
}

.content-section h2:first-child {
    margin-top: 0;
}

.content-section p {
    margin-bottom: 16px;
    color: var(--secondary);
    line-height: 1.7;
}

.content-section ul, .content-section ol {
    margin-bottom: 16px;
    padding-left: 24px;
    color: var(--secondary);
}

.content-section li {
    margin-bottom: 8px;
    line-height: 1.7;
}

/* Premium Page Pricing */
.pricing-section {
    padding: 60px 0;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    position: relative;
    transition: border-color 0.2s, transform 0.2s;
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card.featured {
    border-color: var(--accent);
}

.pricing-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-card .price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.pricing-card .price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--secondary);
}

.pricing-card .price-desc {
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 24px;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
}

.pricing-card li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.875rem;
    color: var(--secondary);
}

.pricing-card li svg {
    width: 18px;
    height: 18px;
    color: var(--success);
    flex-shrink: 0;
}

.pricing-card .pricing-btn {
    display: block;
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.pricing-btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--border);
}

.pricing-btn-outline:hover {
    background: var(--bg);
}

.pricing-btn-primary {
    background: var(--accent);
    color: white;
    border: 2px solid var(--accent);
}

.pricing-btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--primary);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-submit {
    display: inline-block;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.form-submit:hover {
    background: var(--accent-hover);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-cards {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .converter-box {
        padding: 24px;
    }

    .input-container {
        flex-direction: column;
    }

    .fetch-btn {
        justify-content: center;
    }

    .options-bar {
        gap: 24px;
    }

    .toggle-btn {
        padding: 8px 12px;
        font-size: 0.8rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .step {
        flex-direction: column;
        text-align: center;
    }

    .step-reverse {
        flex-direction: column;
    }

    .step-number {
        margin-bottom: 16px;
    }

    .step-image {
        display: none;
    }

    .comparison-table {
        grid-template-columns: 1fr;
    }

    .result-card {
        flex-direction: column;
        text-align: center;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: span 2;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .page-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .platforms {
        flex-direction: column;
        gap: 8px;
    }

    .platform-icons {
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: span 1;
    }
}