/* =================================================================== */
/* Core Docs — full stylesheet. Đặt trong public/ để serve static thuần,
   không qua Vite pipeline (tránh CSS injection bug trên môi trường này).  */
/* Color scheme: Softek — xanh (#1d6fdb / #3b82f6) + đỏ (#dc2626 / #ef4444). */
/* =================================================================== */

:root {
  --header-h: 60px;
  --max-content: 760px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
}

/* ---------- Light theme (default) ---------- */
:root,
:root[data-theme='light'] {
  --bg-1:        #ffffff;
  --bg-2:        #f6f8fb;
  --bg-3:        #eaeef4;
  --bg-header:   rgba(255, 255, 255, 0.9);
  --fg:          #2c3340;
  --fg-strong:   #0c1422;
  --fg-muted:    #5a6273;
  --border:      #e0e5ec;
  --border-strong:#cad1dc;

  --accent:        #1d6fdb;
  --accent-strong: #1456b0;
  --accent-light:  #3b82f6;
  --accent-bg:     #e7f0fb;
  --accent-border: #c7dcf6;
  --accent-fg:     #ffffff;

  --danger:        #dc2626;
  --danger-strong: #b91c1c;
  --danger-light:  #ef4444;
  --danger-bg:     #fdecec;
  --danger-border: #f7c8c8;

  --code-bg:     #f6f8fa;
  --code-fg:     #1f2328;
  --code-border: #d0d7de;
  --inline-code-bg: #e7f0fb;
  --inline-code-fg: #1456b0;
  --kbd-bg:      #f6f8fb;
  --link:        #1456b0;

  --hero-grad-1: #1d6fdb;
  --hero-grad-2: #dc2626;

  --mark-bg:     #fff5b1;
  --mark-fg:     #5a4500;

  --shadow-card: 0 1px 2px rgba(15, 17, 23, 0.04), 0 4px 16px rgba(15, 17, 23, 0.04);
  --shadow-pop:  0 8px 28px -6px rgba(12, 20, 34, 0.18);
  --shadow-modal: 0 20px 60px -12px rgba(12, 20, 34, 0.4);
}

/* ---------- Dark theme ---------- */
:root[data-theme='dark'] {
  --bg-1:        #0d1219;
  --bg-2:        #11171f;
  --bg-3:        #1a212c;
  --bg-header:   rgba(13, 18, 25, 0.82);
  --fg:          #d7dbe5;
  --fg-strong:   #ffffff;
  --fg-muted:    #8b93a7;
  --border:      #232a37;
  --border-strong:#2f3747;

  --accent:        #4f9bff;
  --accent-strong: #6daeff;
  --accent-light:  #82bbff;
  --accent-bg:     rgba(79, 155, 255, 0.16);
  --accent-border: rgba(79, 155, 255, 0.4);
  --accent-fg:     #0d1219;

  --danger:        #ff5757;
  --danger-strong: #ff7878;
  --danger-light:  #ff9292;
  --danger-bg:     rgba(255, 87, 87, 0.16);
  --danger-border: rgba(255, 87, 87, 0.4);

  --code-bg:     #08111c;
  --code-fg:     #e6edf3;
  --code-border: #1f2531;
  --inline-code-bg: rgba(79, 155, 255, 0.16);
  --inline-code-fg: #82bbff;
  --kbd-bg:      #11171f;
  --link:        #6daeff;

  --hero-grad-1: #6daeff;
  --hero-grad-2: #ff7878;

  --mark-bg:     #443a00;
  --mark-fg:     #ffe98a;

  --shadow-card: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  --shadow-pop:  0 12px 32px rgba(0,0,0,.5);
  --shadow-modal: 0 24px 70px -12px rgba(0,0,0,.7);
}

/* ===================== Reset / base ===================== */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg-1);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

code, kbd, pre, samp { font-family: var(--font-mono); }

:not(pre) > code {
  font-size: 0.85em;
  background: var(--inline-code-bg);
  color: var(--inline-code-fg);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  font-weight: 500;
}

pre {
  padding: 1rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--code-border);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.55;
  margin: 1rem 0;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
pre code {
  background: transparent !important;
  padding: 0 !important;
  white-space: pre;
  font-weight: 400;
}

/* Shiki dual theme: dùng `defaultColor: false` → output có 2 bộ CSS variable
   (--shiki-light / --shiki-dark). Cần 2 rule CSS apply theo data-theme. */
:root[data-theme='light'] .astro-code,
:root[data-theme='light'] .astro-code span {
  background-color: var(--shiki-light-bg) !important;
  color: var(--shiki-light) !important;
  font-style: var(--shiki-light-font-style) !important;
  font-weight: var(--shiki-light-font-weight) !important;
  text-decoration: var(--shiki-light-text-decoration) !important;
}

:root[data-theme='dark'] .astro-code,
:root[data-theme='dark'] .astro-code span {
  background-color: var(--shiki-dark-bg) !important;
  color: var(--shiki-dark) !important;
  font-style: var(--shiki-dark-font-style) !important;
  font-weight: var(--shiki-dark-font-weight) !important;
  text-decoration: var(--shiki-dark-text-decoration) !important;
}

/* Code block không dùng Shiki (vd ```text hoặc YAML đơn) — vẫn theo theme. */
pre:not(.astro-code) {
  background: var(--code-bg);
  color: var(--code-fg);
}

kbd {
  display: inline-block;
  padding: 0.1em 0.45em;
  font-size: 0.78em;
  background: var(--kbd-bg);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  color: var(--fg-strong);
  line-height: 1.4;
  font-family: var(--font-mono);
}

mark {
  background: var(--mark-bg);
  color: var(--mark-fg);
  padding: 0 0.15em;
  border-radius: 2px;
  font-weight: 600;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  color: var(--fg-strong);
  font-weight: 700;
  letter-spacing: -0.012em;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}
h1 { font-size: 2.2rem; margin: 0 0 .5rem; font-weight: 800; }
h2 {
  font-size: 1.5rem;
  margin: 2.4rem 0 .9rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--border);
}
h3 { font-size: 1.2rem; margin: 1.7rem 0 .55rem; }
h4 { font-size: 1.0rem; margin: 1.3rem 0 .4rem; color: var(--fg); }

p { margin: .75rem 0; }

ul, ol { padding-left: 1.25rem; margin: .7rem 0; }
li { margin: .25rem 0; }

blockquote {
  border-left: 3px solid var(--accent);
  margin: 1rem 0;
  padding: 0.5rem 1.1rem;
  background: var(--bg-2);
  color: var(--fg-muted);
  border-radius: 0 6px 6px 0;
}
blockquote p { margin: 0; }
blockquote strong { color: var(--fg-strong); }

hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }

table {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.92rem;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  padding: 0.55rem 0.85rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}
tbody tr:last-child td { border-bottom: 0; }
th {
  background: var(--bg-2);
  font-weight: 600;
  color: var(--fg-strong);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
tbody tr:hover td { background: var(--bg-2); }
td code, th code { white-space: normal; }

img, video { max-width: 100%; height: auto; border-radius: 6px; }

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

/* ===================== Header ===================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-header);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg-strong);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
  justify-self: start;
}
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-grid; place-items: center; height: 32px; }
.brand-mark img { height: 32px; width: auto; border-radius: 0; display: block; }
.brand-divider { width: 1px; height: 18px; background: var(--border-strong); }
.brand-text { color: var(--fg-strong); }

.header-search-slot {
  display: flex;
  justify-content: center;
  min-width: 0;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  justify-self: end;
}
.icon-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--fg);
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-grid;
  place-items: center;
  transition: background-color .12s, color .12s, border-color .12s;
}
.icon-btn:hover {
  background: var(--bg-3);
  color: var(--fg-strong);
  border-color: var(--border-strong);
}
.i-sun, .i-moon { display: block; }
:root[data-theme='dark'] .i-moon,
:root:not([data-theme='dark']) .i-sun { display: none; }

/* ===================== Search trigger (in header) ===================== */

.search-trigger {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  max-width: 480px;
  height: 38px;
  padding: 0 0.55rem 0 0.85rem;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--fg-muted);
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  text-align: left;
  transition: background-color .12s, border-color .12s, box-shadow .12s, color .12s;
}
.search-trigger:hover {
  background: var(--bg-3);
  border-color: var(--border-strong);
  color: var(--fg);
}
.search-trigger svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: var(--fg-muted);
}
.search-trigger-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-trigger-kbd {
  display: inline-block;
  padding: 0.1em 0.45em;
  font-size: 0.72rem;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

/* ===================== Search Modal ===================== */

.search-modal {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: calc(100vh);
  z-index: 100;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 6vh 1rem 1rem;
  background: rgba(8, 12, 20, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
:root[data-theme='dark'] .search-modal {
  background: rgba(0, 0, 0, 0.7);
}
.search-modal.open {
  display: flex;
  animation: searchFadeIn .15s ease-out;
}
@keyframes searchFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.search-modal-backdrop {
  position: absolute;
  inset: 0;
  cursor: pointer;
}

.search-modal-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 720px;
  max-height: calc(100vh - 7vh);
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-modal);
  overflow: hidden;
  animation: modalSlideIn .18s ease-out;
}
@keyframes modalSlideIn {
  from { transform: translateY(-8px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

.search-modal-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  gap: 0.7rem;
}
.search-modal-input-wrap > svg {
  width: 18px;
  height: 18px;
  color: var(--fg-muted);
  flex: 0 0 auto;
}
.search-modal-input-wrap input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--fg-strong);
  font-family: inherit;
  font-size: 1rem;
  height: 28px;
  min-width: 0;
}
.search-modal-input-wrap input::placeholder { color: var(--fg-muted); }

.search-modal-close {
  appearance: none;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  transition: background-color .12s, color .12s;
}
.search-modal-close:hover {
  background: var(--bg-3);
  color: var(--fg);
}

.search-modal-results {
  flex: 1;
  overflow-y: auto;
  padding: 0.4rem 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.search-modal-results::-webkit-scrollbar { width: 8px; }
.search-modal-results::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.search-modal-results .group {
  position: sticky;
  top: 0;
  padding: 0.55rem 1rem 0.3rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  background: var(--bg-1);
  z-index: 1;
}

.search-modal-results a {
  display: block;
  padding: 0.7rem 1rem;
  margin: 0.15rem 0.5rem;
  color: var(--fg);
  border-radius: 8px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color .1s, border-color .1s;
}
.search-modal-results a:hover,
.search-modal-results a.kb-active {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  color: var(--fg-strong);
  text-decoration: none;
}

.res-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg-strong);
  margin-bottom: 0.18rem;
  line-height: 1.35;
}
.res-snippet {
  font-size: 0.83rem;
  color: var(--fg-muted);
  line-height: 1.45;
  margin-bottom: 0.18rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.res-href {
  font-size: 0.72rem;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  opacity: 0.75;
}

.search-modal-results .empty,
.search-modal-results .hint {
  padding: 2rem 1rem;
  color: var(--fg-muted);
  font-size: 0.92rem;
  text-align: center;
}
.search-modal-results .hint {
  font-size: 0.9rem;
  padding: 1.3rem 1rem;
}

.search-modal-foot {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  padding: 0.55rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  font-size: 0.78rem;
  color: var(--fg-muted);
}
.search-modal-foot kbd {
  margin-right: 0.25em;
}

/* ===================== Layout shell ===================== */

.shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 220px;
  max-width: 1400px;
  margin: 0 auto;
  gap: 0;
}
.shell.no-toc { grid-template-columns: 260px minmax(0, 1fr); }
main { padding: 2rem 2.5rem 3rem; min-width: 0; }

/* ===================== Sidebar ===================== */

.sidebar {
  position: sticky;
  top: var(--header-h);
  align-self: start;
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: 1.5rem 1rem 2rem 1.25rem;
  border-right: 1px solid var(--border);
  background: var(--bg-1);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.sidebar::-webkit-scrollbar { width: 7px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }

.sidebar .section + .section { margin-top: 1.4rem; }
.sidebar h3 {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-strong);
  margin: 0 0 0.5rem 0.4rem;
}
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar li { margin: 1px 0; }
.sidebar li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.32rem 0.55rem;
  border-radius: 6px;
  font-size: 0.88rem;
  color: var(--fg-muted);
  text-decoration: none;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: background-color .12s, color .12s, border-color .12s;
}
.sidebar li a:hover { background: var(--bg-3); color: var(--fg); text-decoration: none; }
.sidebar li a.active { background: var(--accent-bg); color: var(--accent-strong); font-weight: 500; }
.sidebar .label { flex: 1; }
.sidebar .badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1em 0.5em;
  border-radius: 999px;
  background: var(--accent-bg);
  color: var(--accent-strong);
  border: 1px solid var(--accent-border);
  white-space: nowrap;
}
.sidebar li a.active .badge {
  background: var(--accent-strong);
  color: var(--accent-fg);
  border-color: var(--accent-strong);
}

/* ===================== Doc body ===================== */

.doc-body { max-width: var(--max-content); }
.doc-header {
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.6rem;
}
.doc-header h1 {
  margin: 0 0 .55rem;
  background: linear-gradient(135deg, var(--hero-grad-1) 0%, var(--hero-grad-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.55;
  margin: 0;
  max-width: 70ch;
}
.doc-footer {
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.85rem;
}
.doc-footer code { font-size: 0.85em; }

/* ===================== Table of Contents ===================== */

.toc {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
  align-self: start;
  padding: 0.5rem 0 2rem;
  font-size: 0.85rem;
  line-height: 1.45;
  max-height: calc(100vh - var(--header-h) - 2rem);
  overflow-y: auto;
}
.toc-title {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-strong);
}
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 1px 0; }
.toc li.lvl-3 { padding-left: 1rem; }
.toc li a {
  display: block;
  padding: 0.25rem 0.55rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  transition: color .1s;
}
.toc li a:hover { color: var(--fg); }
.toc li a.active {
  color: var(--accent-strong);
  border-left-color: var(--accent-strong);
  background: var(--accent-bg);
}

/* ===================== Landing / Hero ===================== */

.hero {
  padding: 1rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-strong);
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  padding: 0.25em 0.75em;
  border-radius: 999px;
  margin-bottom: 0.9rem;
}
.hero-title {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  color: var(--fg-strong);
}
.grad {
  background: linear-gradient(135deg, var(--hero-grad-1) 0%, var(--hero-grad-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  color: var(--fg-muted);
  font-size: 1.08rem;
  max-width: 60ch;
  margin: 0 0 1.5rem;
}
.hero-actions { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform .12s, box-shadow .12s, background-color .12s, color .12s;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--hero-grad-1) 0%, var(--hero-grad-2) 100%);
  color: #fff;
  box-shadow: 0 6px 20px -8px rgba(29, 111, 219, .55);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px -8px rgba(220, 38, 38, .55);
}
.btn-ghost {
  background: var(--bg-2);
  color: var(--fg-strong);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-3); border-color: var(--border-strong); }

/* ===================== Cards grid (landing) ===================== */

.grid + .grid { margin-top: 2.5rem; }
.grid > h2 {
  font-size: 1.3rem;
  margin: 0 0 1rem;
  font-weight: 700;
  border: 0;
  padding: 0;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.card {
  position: relative;
  display: block;
  padding: 1.1rem 1.2rem;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  text-decoration: none;
  transition: transform .12s, box-shadow .12s, border-color .12s;
  box-shadow: var(--shadow-card);
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-border);
  box-shadow: 0 8px 24px -10px rgba(29, 111, 219, .35);
  text-decoration: none;
}
.card.highlight {
  background: linear-gradient(180deg, var(--accent-bg) 0%, var(--bg-1) 100%);
  border-color: var(--accent-border);
}
.card.highlight-danger {
  background: linear-gradient(180deg, var(--danger-bg) 0%, var(--bg-1) 100%);
  border-color: var(--danger-border);
}
.card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; color: var(--fg-strong); }
.card p { margin: 0; color: var(--fg-muted); font-size: 0.9rem; line-height: 1.5; }
.card-arrow {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  color: var(--accent-strong);
  font-weight: 700;
  opacity: 0.5;
  transition: opacity .12s, transform .12s;
}
.card:hover .card-arrow { opacity: 1; transform: translateX(2px); }
.badge {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2em 0.6em;
  border-radius: 999px;
  background: var(--accent-bg);
  color: var(--accent-strong);
  border: 1px solid var(--accent-border);
  margin-bottom: 0.5rem;
}
.badge-danger {
  background: var(--danger-bg);
  color: var(--danger-strong);
  border-color: var(--danger-border);
}

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

@media (max-width: 1240px) {
  .shell { grid-template-columns: 240px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 1024px) {
  .shell, .shell.no-toc { grid-template-columns: 1fr; }
  main { padding: 1.5rem 1.25rem 3rem; }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .hero-title { font-size: 1.9rem; }
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.3rem; }
  .brand-text { display: none; }
  .brand-divider { display: none; }
}
@media (max-width: 720px) {
  .header { gap: 0.5rem; padding: 0 0.75rem; }
  .search-trigger-text { display: none; }
  .search-trigger { width: 38px; padding: 0; justify-content: center; gap: 0; max-width: 38px; }
  .search-trigger-kbd { display: none; }
  .search-modal { padding: 6vh 0.5rem 0.5rem; }
  .search-modal-foot { display: none; }
}