/* Clean, modern markdown theme — Keboo.Dev branded */
:root {
    --brand-primary: #8A2652;
    --brand-primary-light: #a83468;
    --brand-primary-dark: #6e1e42;
    --brand-secondary: #8DD72F;
    --brand-secondary-light: #a5e35a;
    --brand-secondary-dark: #6fb51e;

    --bg-color: #ffffff;
    --surface-color: #f8f9fa;
    --text-color: #2d2d2d;
    --heading-color: #1a1a1a;
    --link-color: var(--brand-primary);
    --link-hover: var(--brand-primary-dark);
    --code-bg: #f6f8fa;
    --code-border: #d0d7de;
    --blockquote-border: var(--brand-primary);
    --blockquote-bg: #fdf2f6;
    --hr-color: #d8dee4;
    --header-bg: var(--brand-primary);
    --header-text: #ffffff;
    --footer-bg: #1a1a2e;
    --footer-text: #c4c4d4;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0d1117;
        --surface-color: #161b22;
        --text-color: #e6edf3;
        --heading-color: #ffffff;
        --link-color: var(--brand-secondary);
        --link-hover: var(--brand-secondary-light);
        --code-bg: #161b22;
        --code-border: #30363d;
        --blockquote-border: var(--brand-secondary);
        --blockquote-bg: #1a2410;
        --hr-color: #21262d;
        --header-bg: #12101a;
        --header-text: #f0f0f0;
        --footer-bg: #0a0a14;
        --footer-text: #8b8ba0;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.5rem 3rem;
}

.layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow: auto;
    border: 1px solid var(--code-border);
    border-radius: 12px;
    padding: 16px;
    background: var(--bg-color);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.sidebar__inner {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.sidebar__title {
    font-weight: 700;
    color: var(--heading-color);
}

.sidebar__title:empty {
    display: none;
}

.sidebar__close {
    display: none;
    border: none;
    background: transparent;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-color);
}

.sidebar-backdrop {
    display: none;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-section__header {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--heading-color);
}

.series-nav ul {
    list-style: none;
    padding-left: 0;
}

.series-nav__item {
    margin: 4px 0;
}

.series-nav__item a {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 8px;
    color: var(--text-color);
    text-decoration: none;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.series-nav__item a:hover {
    background-color: var(--code-bg);
    color: var(--heading-color);
}

.series-nav__item.active > a {
    background-color: var(--link-color);
    color: #fff;
}

.series-nav__item.has-children > a {
    font-weight: 600;
}

.series-nav__item ul {
    padding-left: 14px;
    border-left: 1px solid var(--code-border);
    margin-left: 6px;
}

.toc-list {
    list-style: none;
    padding-left: 0;
}

.toc-item {
    margin: 2px 0;
}

.toc-item a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
}

.toc-item a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.toc-item.level-2 {
    padding-left: 10px;
}

.toc-item.level-3 {
    padding-left: 20px;
    font-size: 0.9rem;
}

.content {
    min-width: 0;
}

.sidebar-toggle {
    display: none;
    align-items: center;
    padding: 4px 8px;
    border: 1px solid var(--code-border);
    background: var(--surface-color);
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    margin: 0;
    vertical-align: middle;
    line-height: 1;
}

/* When JS has moved the toggle inside the h1 */
.sidebar-toggle--inline {
    margin-right: 8px;
}

.sidebar-toggle:hover {
    background-color: var(--code-bg);
    border-color: var(--brand-primary);
    color: var(--heading-color);
}

.markdown-content {
    word-wrap: break-word;
}

/* Headings */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 24px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.25;
    color: var(--heading-color);
}

.markdown-content h1 {
    font-size: 2em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--hr-color);
}

.markdown-content h2 {
    font-size: 1.5em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--hr-color);
}

.markdown-content h3 {
    font-size: 1.25em;
}

.markdown-content h4 {
    font-size: 1em;
}

.markdown-content h5 {
    font-size: 0.875em;
}

.markdown-content h6 {
    font-size: 0.85em;
    color: var(--text-color);
    opacity: 0.7;
}

/* Paragraphs and spacing */
.markdown-content p {
    margin-top: 0;
    margin-bottom: 16px;
}

/* Links */
.markdown-content a {
    color: var(--link-color);
    text-decoration: none;
}

.markdown-content a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* Lists */
.markdown-content ul,
.markdown-content ol {
    margin-top: 0;
    margin-bottom: 16px;
    padding-left: 2em;
}

.markdown-content li {
    margin-bottom: 0.25em;
}

.markdown-content li > p {
    margin-bottom: 0.5em;
}

/* Code */
.markdown-content code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 100%;
    background-color: var(--code-bg);
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
}

.markdown-content pre {
    padding: 4px 8px;
    overflow: auto;
    font-size: 100%;
    line-height: 1.45;
    background-color: var(--code-bg);
    border-radius: 6px;
    margin-bottom: 16px;
}

.markdown-content pre code {
    display: inline;
    padding: 0;
    margin: 0;
    overflow: visible;
    line-height: inherit;
    background-color: transparent;
    border: 0;
}

/* Blockquotes */
.markdown-content blockquote {
    margin: 0 0 16px 0;
    padding: 0 1em;
    color: var(--text-color);
    border-left: 0.25em solid var(--blockquote-border);
    background-color: var(--blockquote-bg);
}

.markdown-content blockquote > :first-child {
    margin-top: 0;
}

.markdown-content blockquote > :last-child {
    margin-bottom: 0;
}

/* Horizontal rules */
.markdown-content hr {
    height: 0.25em;
    padding: 0;
    margin: 24px 0;
    background-color: var(--hr-color);
    border: 0;
}

/* Tables */
.markdown-content table {
    border-spacing: 0;
    border-collapse: collapse;
    margin-bottom: 16px;
    width: 100%;
    overflow: auto;
}

.markdown-content table th {
    font-weight: 600;
    padding: 6px 13px;
    border: 1px solid var(--code-border);
    background-color: var(--code-bg);
}

.markdown-content table td {
    padding: 6px 13px;
    border: 1px solid var(--code-border);
}

.markdown-content table tr {
    background-color: var(--bg-color);
    border-top: 1px solid var(--code-border);
}

.markdown-content table tr:nth-child(2n) {
    background-color: var(--code-bg);
}

/* Images */
.markdown-content img {
    max-width: 100%;
    box-sizing: border-box;
}

/* Task lists */
.markdown-content .task-list-item {
    list-style-type: none;
}

.markdown-content .task-list-item input[type="checkbox"] {
    margin: 0 0.2em 0.25em -1.6em;
}

/* Header anchor links */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    position: relative;
}

.markdown-content .header-link {
    position: absolute;
    left: -1.5em;
    padding-right: 0.5em;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
    text-decoration: none;
    color: var(--link-color);
    cursor: pointer;
}

.markdown-content h1:hover .header-link,
.markdown-content h2:hover .header-link,
.markdown-content h3:hover .header-link,
.markdown-content h4:hover .header-link,
.markdown-content h5:hover .header-link,
.markdown-content h6:hover .header-link,
.markdown-content .header-link:focus {
    opacity: 1;
}

.markdown-content .header-link:hover {
    text-decoration: none;
}

.markdown-content .header-link svg {
    width: 1em;
    height: 1em;
    vertical-align: middle;
    fill: currentColor;
}

.header-link-copied {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--code-bg);
    color: var(--text-color);
    padding: 12px 20px;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--code-border);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    pointer-events: none;
    z-index: 1000;
}

.header-link-copied.show {
    opacity: 1;
    transform: translateY(0);
}

.no-sidebar .layout {
    grid-template-columns: 1fr;
}

.no-sidebar .sidebar,
.no-sidebar .sidebar-backdrop,
.no-sidebar .sidebar-toggle {
    display: none;
}

@media (max-width: 960px) {
    .layout {
        display: block;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        max-height: none;
        width: min(320px, 80%);
        transform: translateX(-100%);
        transition: transform 0.2s ease-in-out;
        z-index: 1200;
        border-radius: 0 12px 12px 0;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar__close {
        display: inline-flex;
    }

    .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.35);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease-in-out;
        z-index: 1150;
    }

    .sidebar-backdrop.show {
        opacity: 1;
        pointer-events: auto;
    }

    .sidebar-toggle {
        display: inline-flex;
    }
}

/* ============================================
   Site Header
   ============================================ */
.site-header {
    background: var(--header-bg);
    color: var(--header-text);
    border-bottom: 3px solid var(--brand-primary);
    position: sticky;
    top: 0;
    z-index: 1100;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.site-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-header__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--header-text);
    transition: opacity 0.15s ease;
}

.site-header__brand:hover {
    opacity: 0.9;
}

.site-header__logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
}

.site-header__title {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.site-header__title-accent {
    color: var(--brand-secondary);
    font-weight: 400;
}

.site-header__nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-header__link {
    color: var(--header-text);
    text-decoration: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.92rem;
    font-weight: 500;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.site-header__link:hover {
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--brand-secondary);
}

@media (max-width: 960px) {
    .site-header__inner {
        padding: 0 1rem;
        height: 56px;
    }

    .site-header__logo {
        width: 32px;
        height: 32px;
    }

    .site-header__title {
        font-size: 1.15rem;
    }

    .site-header__link {
        font-size: 0.85rem;
        padding: 5px 10px;
    }
}

/* ============================================
   Site Footer
   ============================================ */
.site-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    border-top: 3px solid var(--brand-primary);
    margin-top: 2rem;
}

.site-footer__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.site-footer__brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.site-footer__logo {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    object-fit: contain;
    opacity: 0.7;
}

.site-footer__name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--header-text);
    opacity: 0.85;
}

.site-footer__copy {
    font-size: 0.85rem;
    margin: 0;
    opacity: 0.7;
}

@media (max-width: 600px) {
    .site-footer__inner {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   Branded refinements
   ============================================ */

/* Active sidebar item uses brand primary */
.series-nav__item.active > a {
    background-color: var(--brand-primary);
    color: #fff;
}

/* Sidebar border accent */
.sidebar {
    border-top: 3px solid var(--brand-secondary);
}

/* Heading underlines pick up brand subtly */
.markdown-content h1 {
    border-bottom-color: var(--brand-primary);
}

.markdown-content h2 {
    border-bottom-color: color-mix(in srgb, var(--brand-primary) 30%, var(--hr-color));
}