/* Shared stylesheet for the generated static pages (error pages, category
   hubs, indexes). The single-page app in index.html keeps its own inline
   CSS so it can paint without a second round trip. Design tokens are kept
   identical between the two. */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #656d76;
    --border-default: #30363d;
    --border-muted: #21262d;
    --accent-primary: #58a6ff;
    --accent-secondary: #1f6feb;
    --success: #238636;
    --warning: #d29922;
    --error: #da3633;
    --shadow: rgba(0, 0, 0, 0.5);
}

:root[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eaeef2;
    --text-primary: #1f2328;
    --text-secondary: #4b5563;
    --text-muted: #6e7681;
    --border-default: #d1d9e0;
    --border-muted: #eaeef2;
    --accent-primary: #0969da;
    --accent-secondary: #0550ae;
    --success: #1a7f37;
    --warning: #9a6700;
    --error: #cf222e;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.65;
    -webkit-text-size-adjust: 100%;
}

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

a { color: var(--accent-primary); }
a:hover { text-decoration: underline; }

code, pre, kbd { font-family: "SFMono-Regular", ui-monospace, Consolas, "Liberation Mono", Menlo, monospace; }

.skip-link {
    position: absolute; top: -100px; left: 0;
    background: var(--accent-primary); color: #000;
    padding: 8px 16px; text-decoration: none; font-weight: 600;
    border-radius: 0 0 8px 0; z-index: 9999;
}
.skip-link:focus { top: 0; }

.container { max-width: 900px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- Site chrome ---------- */

.site-header {
    border-bottom: 1px solid var(--border-default);
    background: var(--bg-secondary);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 50;
}
.site-header-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 20px;
    display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.site-brand {
    font-weight: 700; font-size: 1.05rem; color: var(--text-primary);
    text-decoration: none; white-space: nowrap;
}
.site-brand:hover { color: var(--accent-primary); text-decoration: none; }
.site-nav { display: flex; gap: 14px; flex-wrap: wrap; margin-left: auto; align-items: center; }
.site-nav a { color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; }
.site-nav a:hover { color: var(--accent-primary); }

.theme-toggle {
    position: fixed; bottom: 20px; right: 20px;
    width: 46px; height: 46px; border-radius: 50%;
    background: var(--accent-primary); color: #000; border: none;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; box-shadow: 0 4px 12px var(--shadow); z-index: 100;
}
.theme-toggle:hover { transform: scale(1.08); }

/* ---------- Breadcrumbs ---------- */

.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin: 24px 0 12px; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; }
.breadcrumb li::after { content: "›"; margin-left: 6px; color: var(--border-default); }
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent-primary); }

/* ---------- Article ---------- */

main { padding-bottom: 60px; }

.page-title { font-size: clamp(1.5rem, 4vw, 2.1rem); line-height: 1.25; margin: 4px 0 12px; overflow-wrap: anywhere; }
.page-lede { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 20px; }

.meta-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 26px; }

.badge {
    display: inline-block; padding: 3px 12px; border-radius: 999px;
    font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
    background: var(--bg-tertiary); color: var(--accent-primary);
    border: 1px solid var(--border-default); text-decoration: none;
}
a.badge:hover { border-color: var(--accent-primary); text-decoration: none; }
.badge-muted { color: var(--text-muted); }
.badge-new { color: var(--success); border-color: var(--success); }

section.block { margin: 34px 0; }
section.block h2 {
    font-size: 1.15rem; margin-bottom: 12px;
    padding-bottom: 8px; border-bottom: 1px solid var(--border-muted);
}
section.block h3 { font-size: 1rem; margin: 18px 0 8px; }
section.block p { margin-bottom: 12px; }
section.block ul, section.block ol { margin: 0 0 12px 22px; }
section.block li { margin-bottom: 10px; }
section.block li > code, section.block p > code {
    background: var(--bg-tertiary); padding: 1px 6px; border-radius: 5px;
    font-size: 0.88em; border: 1px solid var(--border-muted);
}

/* ---------- Code blocks ---------- */

.code-wrap { position: relative; margin: 14px 0; }
.code-head {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--bg-tertiary); border: 1px solid var(--border-default);
    border-bottom: none; border-radius: 8px 8px 0 0; padding: 7px 12px;
    font-size: 0.78rem; color: var(--text-secondary); font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.04em;
}
.copy-button {
    background: var(--bg-secondary); color: var(--text-secondary);
    border: 1px solid var(--border-default); border-radius: 6px;
    padding: 3px 10px; font-size: 0.72rem; cursor: pointer; font-weight: 600;
    text-transform: none; letter-spacing: 0;
}
.copy-button:hover { color: var(--accent-primary); border-color: var(--accent-primary); }
.copy-button.copied { color: #fff; background: var(--success); border-color: var(--success); }
pre.code-block {
    background: var(--bg-secondary); border: 1px solid var(--border-default);
    border-radius: 0 0 8px 8px; padding: 14px 16px; overflow-x: auto;
    font-size: 0.85rem; line-height: 1.6; color: var(--text-primary);
    white-space: pre; tab-size: 4;
}

.tabs { display: flex; gap: 0; margin-top: 14px; }
.tab {
    background: var(--bg-secondary); color: var(--text-secondary);
    border: 1px solid var(--border-default); border-bottom: none;
    padding: 6px 14px; font-size: 0.8rem; cursor: pointer; font-weight: 600;
}
.tab:first-child { border-radius: 8px 0 0 0; }
.tab:last-child { border-radius: 0 8px 0 0; border-left: none; }
.tab[aria-selected="true"] { background: var(--bg-tertiary); color: var(--accent-primary); }
.tabpanel[hidden] { display: none; }
.tabs + .tabpanel .code-head { border-radius: 0; }

/* ---------- Callouts ---------- */

.callout {
    border-left: 3px solid var(--warning); background: var(--bg-secondary);
    border-radius: 0 8px 8px 0; padding: 12px 16px; margin: 18px 0;
    font-size: 0.9rem; color: var(--text-secondary);
}
.callout strong { color: var(--text-primary); }

/* ---------- Lists of links ---------- */

.link-list { list-style: none; margin: 0 !important; display: grid; gap: 8px; }
.link-list li { margin: 0 !important; }
.link-list a {
    display: block; padding: 10px 14px; border: 1px solid var(--border-default);
    border-radius: 8px; background: var(--bg-secondary); text-decoration: none;
    color: var(--text-primary); font-size: 0.92rem;
}
.link-list a:hover { border-color: var(--accent-primary); text-decoration: none; }
.link-list .sub { display: block; color: var(--text-muted); font-size: 0.8rem; margin-top: 2px; }

.card-grid {
    display: grid; gap: 12px; list-style: none; margin: 0 !important;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}
.card-grid li { margin: 0 !important; }
.card-grid a {
    display: block; height: 100%; padding: 14px 16px;
    border: 1px solid var(--border-default); border-radius: 10px;
    background: var(--bg-secondary); text-decoration: none; color: var(--text-primary);
}
.card-grid a:hover { border-color: var(--accent-primary); text-decoration: none; }
.card-grid .card-title { font-weight: 600; display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.card-grid .card-count { color: var(--text-muted); font-size: 0.78rem; font-weight: 500; }
.card-grid .card-desc { color: var(--text-secondary); font-size: 0.82rem; margin-top: 5px; line-height: 1.5; }

.tool-list { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0 !important; }
.tool-list li { margin: 0 !important; }
.tool-list code {
    background: var(--bg-tertiary); border: 1px solid var(--border-default);
    border-radius: 6px; padding: 4px 10px; font-size: 0.82rem; color: var(--text-primary);
}

.source-link {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--bg-tertiary); border: 1px solid var(--border-default);
    border-radius: 6px; padding: 6px 12px; font-size: 0.85rem;
    text-decoration: none; color: var(--accent-primary); word-break: break-all;
}
.source-link:hover { border-color: var(--accent-primary); text-decoration: none; }

/* ---------- A–Z index ---------- */

.az-nav { display: flex; flex-wrap: wrap; gap: 6px; margin: 18px 0 30px; }
.az-nav a {
    padding: 4px 10px; border: 1px solid var(--border-default); border-radius: 6px;
    font-size: 0.85rem; text-decoration: none; background: var(--bg-secondary);
}
.index-group { margin: 30px 0; scroll-margin-top: 80px; }
.index-group h2 {
    font-size: 1.05rem; border-bottom: 1px solid var(--border-muted);
    padding-bottom: 6px; margin-bottom: 12px;
    display: flex; justify-content: space-between; align-items: baseline; gap: 10px;
}
.index-group h2 .count { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; }
.index-list { columns: 2; column-gap: 26px; list-style: none; margin: 0 !important; }
.index-list li { break-inside: avoid; margin: 0 0 6px !important; font-size: 0.9rem; }
@media (max-width: 700px) { .index-list { columns: 1; } }

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

.site-footer {
    border-top: 1px solid var(--border-default); background: var(--bg-secondary);
    padding: 30px 0; font-size: 0.88rem; color: var(--text-secondary);
}
.site-footer a { color: var(--accent-primary); }
.footer-cols { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-bottom: 20px; }
.footer-cols h2 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 8px; }
.footer-cols ul { list-style: none; }
.footer-cols li { margin-bottom: 5px; }
.footer-bottom { border-top: 1px solid var(--border-muted); padding-top: 16px; color: var(--text-muted); font-size: 0.82rem; }
.footer-contact {
    margin-top: 10px; font-size: 0.82rem; color: var(--text-muted);
    display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
}
.footer-contact span { color: var(--text-secondary); font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace); }

.safety-warning {
    background: linear-gradient(135deg, #da3633, #f85149); color: #fff;
    padding: 8px 0; text-align: center; font-size: 0.85rem; font-weight: 500;
}
.safety-warning a { color: #fff; text-decoration: underline; }

.toast {
    position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%) translateY(20px);
    background: var(--bg-tertiary); color: var(--text-primary);
    border: 1px solid var(--border-default); border-radius: 8px;
    padding: 10px 18px; font-size: 0.88rem; opacity: 0; pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease; z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }