:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f4;
    --bg-card: #ffffff;
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    --border: #e4e4e7;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Courier New', monospace;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover {
    text-decoration: underline;
}

code {
    background: #f0f0ef;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.875em;
    color: var(--text-primary);
}

.code-example {
    background: #0f0f1e;
    border: 1px solid #2a2a3e;
    border-radius: 8px;
    padding: 14px;
    font-family: "JetBrains Mono", "Fira Code", monospace;
    font-size: 12px;
    line-height: 1.6;
    color: #e5e7eb;
    overflow-x: auto;
    position: relative;
}

.code-example::-webkit-scrollbar {
    height: 6px;
}

.code-example::-webkit-scrollbar-thumb {
    background: #2a2a3e;
    border-radius: 4px;
}

/* ---- Navbar ---- */

.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 0.9rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand .logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.navbar-item {
    color: var(--text-secondary) !important;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s;
}

.navbar-item:hover {
    color: var(--text-primary) !important;
    background: none !important;
}

.navbar-burger {
    color: var(--text-primary);
}

/* ---- Hero ---- */

.hero-section {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 5rem 2rem 4rem;
    text-align: center;
}

.hero-inner {
    max-width: 680px;
    margin: 0 auto;
}

.hero-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    background: var(--accent-light);
    border: 1px solid #bfdbfe;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-bottom: 1.5rem;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
    line-height: 1.6;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.badge {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-hero {
    display: inline-block;
    background: var(--text-primary);
    color: #ffffff;
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: opacity 0.15s;
}

.btn-hero:hover {
    opacity: 0.85;
    text-decoration: none;
    color: #ffffff;
}

.btn-outline {
    display: inline-block;
    background: transparent;
    color: var(--text-primary);
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.95rem;
    border: 1px solid var(--border);
    text-decoration: none;
    transition: border-color 0.15s, background 0.15s;
}

.btn-outline:hover {
    border-color: #aaa;
    background: var(--bg-secondary);
    text-decoration: none;
    color: var(--text-primary);
}

/* ---- Layout ---- */

.documentation-container {
    padding: 3rem 0;
}

.container-wide {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-grid {
    margin-bottom: 3.5rem;
}

.section-title-center {
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

/* ---- Cards ---- */

.content-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 2rem;
}

.content-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.content-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.content-card p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

/* ---- Personalities ---- */

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

.personality-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: border-color 0.15s;
}

.personality-item:hover {
    border-color: #aaa;
}

.personality-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
    color: white;
}

.gemini-icon {
    background: #4285f4;
}

.cohere-icon {
    background: #e05252;
}

.mistral-icon {
    background: #2563eb;
}

.personality-item h4 {
    margin: 0 0 0.2rem 0;
    font-size: 0.95rem;
}

.personality-item p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ---- Feature cards ---- */

.feature-card-compact {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    transition: border-color 0.15s;
}

.feature-card-compact:hover {
    border-color: #aaa;
}

.feature-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.feature-card-compact p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
    line-height: 1.6;
}

/* ---- Notices ---- */

.notice-box {
    padding: 0.9rem 1rem;
    border-radius: 6px;
    border-left: 3px solid;
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.warning-notice {
    background: var(--warning-light);
    border-color: var(--warning);
}

.info-notice {
    background: var(--accent-light);
    border-color: var(--accent);
}

/* ---- Download ---- */

.download-box-compact {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-top: 1.25rem;
}

.btn-download,
.btn-primary {
    display: inline-block;
    background: var(--text-primary);
    color: #ffffff;
    padding: 0.7rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: opacity 0.15s;
}

.btn-download:hover,
.btn-primary:hover {
    opacity: 0.8;
    color: #ffffff;
    text-decoration: none;
}

.download-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* ---- Requirements ---- */

.requirement-list {
    list-style: none;
    padding: 0;
}

.requirement-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.requirement-list li:last-child {
    border-bottom: none;
}

.requirement-list i {
    color: var(--accent);
    width: 18px;
    text-align: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* ---- Captions ---- */

.caption-features {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.caption-features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.caption-features li:last-child {
    border-bottom: none;
}

.caption-preview-box {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.caption-example {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

.assistant-caption {
    background: #166534;
    color: #f0fdf4;
}

.system-caption {
    background: #92400e;
    color: #fffbeb;
}

.suggestion-caption {
    background: #4c1d95;
    color: #f5f3ff;
}

/* ---- Wake words / examples ---- */

.wake-words-compact {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin: 0.75rem 0;
}

.wake-badge {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--mono);
}

.example-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.example-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.6rem 0.9rem;
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--mono);
}

/* ---- Actions ---- */

.action-list-compact {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.action-item-compact {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 0.65rem 0.9rem;
    border-radius: 6px;
    font-size: 0.825rem;
    color: var(--text-secondary);
}

.action-item-compact strong {
    color: var(--text-primary);
    font-family: var(--mono);
    font-size: 0.8rem;
}

/* ---- FAQ ---- */

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    padding: 1rem 1.25rem;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    transition: background 0.15s;
    user-select: none;
}

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

.faq-question i {
    color: var(--text-muted);
    font-size: 0.7rem;
    transition: transform 0.2s;
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(90deg);
}

.faq-answer {
    padding: 0 1.25rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    padding: 0 1.25rem 1.25rem;
    max-height: 600px;
}

/* ---- Troubleshooting ---- */

.trouble-list-compact {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.trouble-item-compact h4 {
    margin: 0 0 0.35rem 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.trouble-item-compact p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ---- Roadmap ---- */

.roadmap-list {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.roadmap-item {
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.roadmap-item strong {
    color: var(--text-primary);
    font-family: var(--mono);
    font-size: 0.825rem;
}

/* ---- Footer ---- */

.footer-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.footer-content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2rem;
}

.footer-content-grid h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.footer-content-grid p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.15s;
}

.footer-links a:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---- Back to top ---- */

.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 40px;
    height: 40px;
    background: var(--text-primary);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 0.9rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s, visibility 0.25s;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    opacity: 0.8;
}

/* ---- Utility ---- */

.mt-4 {
    margin-top: 1.25rem;
}

.mt-5 {
    margin-top: 1.75rem;
}

/* ---- Scrollbar ---- */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #aaa;
}

::selection {
    background: var(--accent-light);
    color: var(--accent);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }

    .action-list-compact {
        grid-template-columns: 1fr !important;
    }

    .faq-grid {
        grid-template-columns: 1fr !important;
    }

    .footer-content-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }

    .hero-section {
        padding: 3rem 1.25rem 2.5rem;
    }

    .hero-section h1 {
        font-size: 1.75rem;
    }

    .hero-sub {
        font-size: 0.95rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-hero,
    .btn-outline {
        text-align: center;
    }

    .content-card {
        padding: 1.25rem;
    }

    .container-wide {
        padding: 0 1rem;
    }

    .section-title-center {
        font-size: 1.25rem;
    }

    .navbar {
        padding: 0.75rem 1rem;
    }

    .back-to-top {
        bottom: 18px;
        right: 18px;
    }

    .documentation-container {
        padding: 2rem 0;
    }

    .section-grid {
        margin-bottom: 2rem;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}