:root {
    color-scheme: light;
    --docs-bg: #ffffff;
    --docs-surface: #ffffff;
    --docs-sidebar-bg: #fafafa;
    --docs-topbar-bg: rgba(255, 255, 255, 0.92);
    --docs-border: #e5e7eb;
    --docs-text: #111827;
    --docs-muted: #6b7280;
    --docs-link: #2563eb;
    --docs-active-bg: #111827;
    --docs-active-text: #ffffff;
    --docs-hover-bg: #f3f4f6;
    --docs-code-bg: #f8fafc;
    --docs-code-text: #111827;
    --docs-pre-bg: #0f172a;
    --docs-pre-text: #e5e7eb;
    --docs-table-header: #f9fafb;
    --docs-table-row-alt: #fcfcfd;
    --docs-blockquote-bg: #f9fafb;
    --docs-blockquote-border: #111827;
    --docs-blockquote-text: #374151;
    --docs-logo-bg: #f3f4f6;
    --docs-card-bg: #ffffff;
    --docs-card-hover-border: #cbd5e1;
    --docs-card-shadow: rgba(15, 23, 42, 0.08);
}
html[data-theme="dark"] {
    color-scheme: dark;
    --docs-bg: #0b1120;
    --docs-surface: #111827;
    --docs-sidebar-bg: #0f172a;
    --docs-topbar-bg: rgba(11, 17, 32, 0.92);
    --docs-border: #243244;
    --docs-text: #e5e7eb;
    --docs-muted: #9ca3af;
    --docs-link: #60a5fa;
    --docs-active-bg: #e5e7eb;
    --docs-active-text: #0b1120;
    --docs-hover-bg: #1f2937;
    --docs-code-bg: #111827;
    --docs-code-text: #e5e7eb;
    --docs-pre-bg: #020617;
    --docs-pre-text: #e5e7eb;
    --docs-table-header: #111827;
    --docs-table-row-alt: #0f172a;
    --docs-blockquote-bg: #111827;
    --docs-blockquote-border: #60a5fa;
    --docs-blockquote-text: #d1d5db;
    --docs-logo-bg: #1f2937;
    --docs-card-bg: #111827;
    --docs-card-hover-border: #475569;
    --docs-card-shadow: rgba(0, 0, 0, 0.35);
}
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--docs-bg);
    color: var(--docs-text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
}

.docs-shell {
    min-height: 100vh;
}

.docs-topbar {
    height: 64px;
    border-bottom: 1px solid var(--docs-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    background: var(--docs-topbar-bg);
    backdrop-filter: blur(12px);
    z-index: 20;
}

.docs-brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--docs-text);
    text-decoration: none;
}

.docs-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--docs-logo-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.docs-brand strong {
    display: block;
    font-size: 15px;
    line-height: 1.2;
}

.docs-brand small {
    display: block;
    color: var(--docs-muted);
    font-size: 12px;
    margin-top: 2px;
}

.docs-topnav {
    display: flex;
    align-items: center;
    gap: 18px;
}

    .docs-topnav a {
        color: var(--docs-muted);
        text-decoration: none;
        font-size: 14px;
    }

        .docs-topnav a:hover {
            color: var(--docs-text);
        }

.docs-layout {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    min-height: calc(100vh - 64px);
}

.docs-sidebar {
    border-right: 1px solid var(--docs-border);
    background: var(--docs-sidebar-bg);
}

.docs-sidebar-inner {
    position: sticky;
    top: 64px;
    height: calc(100vh - 64px);
    overflow-y: auto;
    padding: 24px 18px;
}

.docs-sidebar-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--docs-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 18px;
}

.docs-nav-group {
    margin-bottom: 24px;
}

.docs-nav-group-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--docs-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 8px 8px;
}

.docs-nav-link {
    display: flex;
    align-items: center;
    min-height: 38px;
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--docs-muted);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 2px;
}

    .docs-nav-link:hover {
        background: var(--docs-hover-bg);
        color: var(--docs-text);
    }

    .docs-nav-link.active {
        background: var(--docs-active-bg);
        color: var(--docs-active-text);
        font-weight: 600;
    }

.docs-main {
    min-width: 0;
    padding: 48px 32px 80px;
}

.docs-article {
    max-width: 880px;
    margin: 0 auto;
    line-height: 1.8;
}

    .docs-article h1 {
        font-size: 42px;
        line-height: 1.15;
        letter-spacing: -0.03em;
        margin: 0 0 20px;
    }

    .docs-article h2 {
        font-size: 26px;
        line-height: 1.3;
        letter-spacing: -0.02em;
        margin: 48px 0 16px;
        padding-top: 16px;
        border-top: 1px solid var(--docs-border);
    }

    .docs-article h3 {
        font-size: 20px;
        margin: 32px 0 12px;
    }

    .docs-article p {
        margin: 0 0 18px;
    }

    .docs-article a {
        color: var(--docs-link);
    }

    .docs-article table {
        width: 100%;
        border-collapse: collapse;
        margin: 24px 0;
        font-size: 15px;
        overflow: hidden;
        overflow-x: auto;
        border-radius: 12px;
    }

    .docs-article th,
    .docs-article td {
        border: 1px solid var(--docs-border);
        padding: 12px 14px;
        vertical-align: top;
    }

    .docs-article th {
        background: var(--docs-table-header);
        font-weight: 700;
        text-align: left;
    }

    .docs-article tr:nth-child(even) td {
        background: var(--docs-table-row-alt);
    }

    .docs-article blockquote {
        margin: 24px 0;
        padding: 16px 18px;
        border-left: 4px solid var(--docs-blockquote-border);
        background: var(--docs-blockquote-bg);
        border-radius: 0 12px 12px 0;
        color: var(--docs-blockquote-text);
    }

    .docs-article code {
        background: var(--docs-code-bg);
        color: var(--docs-code-text);
        border: 1px solid var(--docs-border);
        border-radius: 6px;
        padding: 2px 6px;
        font-size: 0.92em;
    }

    .docs-article pre {
        background: var(--docs-pre-bg);
        color: var(--docs-pre-text);
        padding: 18px;
        border-radius: 14px;
        overflow-x: auto;
        margin: 24px 0;
    }

        .docs-article pre code {
            background: transparent;
            border: none;
            padding: 0;
            color: inherit;
        }

    .docs-article hr {
        border: 0;
        border-top: 1px solid var(--docs-border);
        margin: 40px 0;
    }

@media (max-width: 900px) {
    .docs-layout {
        grid-template-columns: 1fr;
    }

    .docs-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--docs-border);
    }

    .docs-sidebar-inner {
        position: static;
        height: auto;
        max-height: 320px;
    }

    .docs-main {
        padding: 32px 20px 64px;
    }

    .docs-article h1 {
        font-size: 34px;
    }
}

@media (max-width: 640px) {
    .docs-topbar {
        height: auto;
        min-height: 64px;
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
        padding: 14px 18px;
        position: static;
    }

    .docs-topnav {
        gap: 14px;
        flex-wrap: wrap;
    }

    .docs-main {
        padding: 28px 16px 56px;
    }

    .docs-article {
        font-size: 15px;
    }

        .docs-article table {
            display: block;
            overflow-x: auto;
            white-space: nowrap;
        }
}

.lesson-header {
    margin-bottom: 32px;
}

.lesson-eyebrow {
    color: var(--docs-muted);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

.lesson-description {
    color: var(--docs-muted);
    font-size: 18px;
    max-width: 720px;
    margin-top: -8px;
}

.lesson-content {
    margin-top: 24px;
}

.lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 32px;
}

.lesson-card {
    display: block;
    border: 1px solid var(--docs-border);
    border-radius: 16px;
    padding: 20px;
    text-decoration: none;
    color: var(--docs-text);
    background: var(--docs-card-bg);
    transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

    .lesson-card:hover {
        border-color: var(--docs-card-hover-border);
        transform: translateY(-2px);
        box-shadow: 0 14px 30px var(--docs-card-shadow);
    }

.lesson-card-category {
    display: block;
    color: var(--docs-muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
}

.lesson-card strong {
    display: block;
    font-size: 18px;
    margin-bottom: 8px;
}

.lesson-card p {
    color: var(--docs-muted);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

.docs-article td:nth-child(3),
.docs-article td:nth-child(4) {
    direction: rtl;
    text-align: right;
}

.theme-toggle {
    width: 36px;
    height: 36px;
    border: 1px solid var(--docs-border);
    border-radius: 999px;
    background: var(--docs-surface);
    color: var(--docs-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

    .theme-toggle:hover {
        background: var(--docs-hover-bg);
        transform: translateY(-1px);
    }

.theme-toggle-icon {
    line-height: 1;
}

.speakable {
    font-weight: 600;
}

.speak-button {
    margin-left: 0.45rem;
    border: 1px solid var(--docs-border);
    background: var(--docs-surface);
    color: var(--docs-text);
    border-radius: 999px;
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-size: 13px;
    line-height: 1;
    vertical-align: middle;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

    .speak-button:hover {
        background: var(--docs-hover-bg);
    }

.docs-article table .speak-button {
    width: 24px;
    height: 24px;
    font-size: 12px;
    margin-left: 0.35rem;
}