/**
 * Epoch Converter - Stylesheet
 * Mobile-first, dark/light mode, performance optimized
 */

/* ================================
   CSS Variables & Reset
   ================================ */
:root {
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-light: #1e3a5f;
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --border-hover: #475569;
    --success: #10b981;
    --success-bg: #064e3b;
    --error: #ef4444;
    --error-bg: #7f1d1d;
    --warning: #f59e0b;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --transition: 0.2s ease;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco, Consolas, monospace;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

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

.mono {
    font-family: var(--font-mono);
}

/* ================================
   Layout
   ================================ */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
}

main {
    flex: 1;
    padding: 2rem 0;
}

/* ================================
   Header
   ================================ */
header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo svg {
    flex-shrink: 0;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text);
}

.btn-icon {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem;
    cursor: pointer;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    width: 40px;
    height: 40px;
}

.btn-icon:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-coffee:hover {
    border-color: #FFDD00;
    color: #FFDD00;
}

/* ================================
   Hero / Current Time
   ================================ */
.hero {
    text-align: center;
    margin-bottom: 2rem;
}

.current-time {
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    color: #fff;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 0;
    box-shadow: var(--shadow-md);
}

.current-time-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.current-time-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
}

.current-time-sub {
    font-size: 0.875rem;
    opacity: 0.85;
    margin-top: 0.5rem;
}

/* ================================
   Converter Section
   ================================ */
.converter-section {
    margin-bottom: 3rem;
}

.converter-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

/* Tabs */
.converter-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: none;
    border: none;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

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

.tab-btn.active {
    color: var(--primary);
    background: var(--bg);
    border-bottom-color: var(--primary);
}

.tab-btn svg {
    flex-shrink: 0;
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 1.5rem;
}

.tab-content.active {
    display: block;
}

/* ================================
   Forms
   ================================ */
.converter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.flex-grow {
    flex: 1;
}

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

.form-group input,
.form-group select {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    transition: all var(--transition);
    width: 100%;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.form-group small {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

/* ================================
   Results Panel
   ================================ */
.results-panel {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.results-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.results-grid {
    display: grid;
    gap: 0.75rem;
}

.result-item {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 0.25rem 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    align-items: center;
}

.result-item.large {
    padding: 1rem;
}

.result-label {
    grid-column: 1 / -1;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.result-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    word-break: break-all;
}

.result-value.mono {
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.copy-btn {
    background: none;
    border: none;
    padding: 0.375rem;
    cursor: pointer;
    color: var(--text-muted);
    border-radius: 4px;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.copy-btn:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.copy-btn.copied {
    color: var(--success);
}

/* ================================
   Code Examples Section
   ================================ */
.code-section {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.code-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.code-tab-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.code-tab-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text);
}

.code-tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

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

.code-panel {
    display: none;
}

.code-panel.active {
    display: block;
}

.code-example {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 1rem;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    font-weight: 500;
}

.copy-code-btn {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.copy-code-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.code-example pre {
    padding: 1rem;
    margin: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.code-example code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--text);
    white-space: pre;
}

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

/* ================================
   Timestamps Table
   ================================ */
.timestamps-section {
    margin-bottom: 3rem;
}

.timestamps-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.timestamps-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.timestamps-table th,
.timestamps-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.timestamps-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
}

.timestamps-table tr:last-child td {
    border-bottom: none;
}

.timestamps-table tr:hover {
    background: var(--bg-secondary);
}

.use-timestamp-btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--primary-light);
    border: none;
    border-radius: 4px;
    color: var(--primary);
    cursor: pointer;
    transition: all var(--transition);
}

.use-timestamp-btn:hover {
    background: var(--primary);
    color: #fff;
}

/* ================================
   Content Section
   ================================ */
.content-section {
    margin-bottom: 3rem;
}

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

.content-section h2 {
    margin-bottom: 1rem;
}

.content-section h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.content-section ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.content-section li {
    margin-bottom: 0.5rem;
}

.content-section li strong {
    color: var(--text);
}

/* ================================
   FAQ Section
   ================================ */
.faq-section {
    margin-bottom: 3rem;
}

.faq-section h2 {
    margin-bottom: 1.5rem;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.faq-question {
    padding: 1rem 1.25rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    list-style: none;
    transition: all var(--transition);
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-muted);
    transition: transform var(--transition);
}

.faq-item[open] .faq-question {
    background: var(--bg-secondary);
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-answer {
    padding: 0 1.25rem 1.25rem;
    color: var(--text-secondary);
}

.faq-answer p {
    margin-bottom: 0;
}

/* ================================
   Related Section
   ================================ */
.related-section {
    margin-bottom: 3rem;
}

.related-section h2 {
    margin-bottom: 1.5rem;
}

.related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.related-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all var(--transition);
}

.related-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.related-card svg {
    color: var(--primary);
}

.related-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text);
}

.related-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ================================
   Footer
   ================================ */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 0.75rem;
}

.footer-brand p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.footer-col a {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
}

/* ================================
   Responsive Breakpoints
   ================================ */

/* Small devices (640px and up) */
@media (min-width: 640px) {
    .current-time-value {
        font-size: 3rem;
    }

    .form-row {
        flex-direction: row;
    }

    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-item.large {
        grid-column: span 1;
    }

    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Medium devices (768px and up) */
@media (min-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    main {
        padding: 3rem 0;
    }

    .tab-content {
        padding: 2rem;
    }

    .related-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
    }

    .footer-links {
        gap: 4rem;
    }
}

/* Large devices (1024px and up) */
@media (min-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.75rem; }

    .results-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .result-item.large {
        grid-column: span 1;
    }
}

/* ================================
   Utilities
   ================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    padding: 0.75rem 1.5rem;
    background: var(--text);
    color: var(--bg);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--error);
}

/* Focus visible */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    header, footer, .code-section, .related-section {
        display: none;
    }

    .converter-card {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* ================================
   Breadcrumb Navigation
   ================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

.breadcrumb span {
    color: var(--text-muted);
}

/* ================================
   Content Article Styles
   ================================ */
.content-article {
    max-width: 800px;
}

.article-header {
    margin-bottom: 2rem;
}

.article-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.article-meta {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
}

.current-time-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.current-time-inline .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.current-time-inline .value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary);
}

.content-article section {
    margin-bottom: 2.5rem;
}

.content-article h2 {
    margin-bottom: 1rem;
    padding-top: 1rem;
}

.content-article h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.content-article p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.content-article ul,
.content-article ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.content-article li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.content-article code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    padding: 0.125rem 0.375rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
}

.content-article pre code {
    display: block;
    padding: 1rem;
    border: none;
    background: none;
}

/* Info Boxes */
.info-box {
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.info-box h4 {
    margin-bottom: 0.75rem;
    font-size: 0.9375rem;
}

.info-box ul {
    margin-bottom: 0;
}

.highlight-box {
    padding: 1.5rem;
    text-align: center;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.highlight-box p {
    margin: 0;
}

.highlight-box p:first-child {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.highlight-box.danger {
    background: var(--error-bg);
    border: 1px solid var(--error);
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-item {
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.feature-item h4 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.feature-item p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin: 0;
}

@media (min-width: 640px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
    margin-bottom: 1.5rem;
}

.data-table th,
.data-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.data-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
}

.data-table td small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.comparison-table {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid var(--border);
}

.comparison-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.8125rem;
}

/* ================================
   Language Navigation
   ================================ */
.language-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.lang-link {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.lang-link:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
}

/* Language Sections */
.language-section {
    margin-bottom: 3rem;
    padding-top: 1rem;
}

.language-section h2 {
    margin-bottom: 0.5rem;
}

.language-section > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.code-examples {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ================================
   API Documentation Styles
   ================================ */
.api-info-box {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.api-info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.api-info-item .label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.api-info-item code {
    font-size: 0.875rem;
    background: none;
    border: none;
    padding: 0;
    color: var(--text);
}

@media (min-width: 640px) {
    .api-info-box {
        grid-template-columns: repeat(4, 1fr);
    }
}

.api-nav {
    margin-bottom: 2rem;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.api-nav h2 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.api-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
}

.api-nav a {
    font-size: 0.9375rem;
}

.api-endpoint {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.api-endpoint:last-of-type {
    border-bottom: none;
}

.api-endpoint h2 {
    margin-bottom: 0.5rem;
}

.api-endpoint > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.endpoint-method {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.method {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

.method.get {
    background: #1e3a5f;
    color: #60a5fa;
}

.method.post {
    background: #064e3b;
    color: #34d399;
}

.endpoint-method code {
    font-size: 0.9375rem;
    background: none;
    border: none;
    padding: 0;
}

.params-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-size: 0.9375rem;
}

.params-table th,
.params-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid var(--border);
}

.params-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
}

.params-table code {
    font-size: 0.8125rem;
}

.note {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ================================
   E-E-A-T Enhancements
   ================================ */

/* Author Byline */
.author-byline {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.author-info {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.author-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.author-name {
    font-weight: 600;
    color: var(--primary);
}

.author-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.author-title::before {
    content: "•";
    margin-right: 0.5rem;
    color: var(--text-muted);
}

.last-updated {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.last-updated time {
    font-weight: 500;
    color: var(--text);
}

/* ================================
   Page Hero Section
   ================================ */
.page-hero {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.page-hero h1 {
    margin-bottom: 0.75rem;
}

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

/* ================================
   Stats Grid (About Page)
   ================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin: 2rem 0;
}

.stat-item {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

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

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ================================
   Team Grid (About Page)
   ================================ */
.team-grid {
    display: grid;
    gap: 2rem;
    margin: 2rem 0;
}

.team-member {
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}

.team-avatar {
    margin-bottom: 1rem;
}

.team-avatar svg {
    border-radius: 50%;
}

.team-member h3 {
    margin-bottom: 0.25rem;
}

.team-title {
    font-size: 0.9375rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.team-bio {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.team-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.team-links a {
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

/* ================================
   Contact Page
   ================================ */
.contact-grid {
    display: grid;
    gap: 2rem;
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.contact-method h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.contact-method h3 svg {
    color: var(--primary);
}

.contact-method p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.contact-method ul {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-left: 1.25rem;
}

.response-time {
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-top: 1.5rem;
}

.response-time h3 {
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
}

.response-time p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact-form .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.contact-form .required {
    color: var(--error);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    transition: border-color var(--transition);
}

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

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

.form-note {
    color: var(--text-muted);
}

/* Alerts */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.alert svg {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: var(--error-bg);
    border: 1px solid var(--error);
    color: var(--error);
}

.alert strong {
    display: block;
    margin-bottom: 0.25rem;
}

.alert p {
    margin: 0;
    font-size: 0.9375rem;
}

/* ================================
   Legal Content (Privacy, Terms)
   ================================ */
.legal-content {
    max-width: 800px;
}

.legal-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-top: 1rem;
}

.legal-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.effective-date {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.highlight-box {
    padding: 1.25rem;
    background: var(--primary-light);
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.highlight-box h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--primary);
}

.highlight-box ul {
    margin-bottom: 0;
}

/* ================================
   Header Navigation
   ================================ */
.header-nav {
    display: none;
    gap: 1rem;
}

.header-nav a {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.header-nav a:hover,
.header-nav a.active {
    color: var(--primary);
}

@media (min-width: 768px) {
    .header-nav {
        display: flex;
    }
}

/* ================================
   Breadcrumb Enhancement
   ================================ */
.breadcrumb ol {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    margin-left: 0.5rem;
    color: var(--text-muted);
}

/* Footer Legal Links */
.footer-legal {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.footer-legal a {
    color: var(--text-muted);
}

.footer-legal a:hover {
    color: var(--primary);
}