/* ─── Variables ──────────────────────────────────────── */
:root {
  --bg:         #0c0c0c;
  --bg-lift:    #141414;
  --bg-muted:   #1c1c1c;
  --border:     rgba(255,255,255,0.07);
  --border-mid: rgba(255,255,255,0.12);
  --text:       #dedede;
  --text-sec:   #7c7c7c;
  --text-ter:   #464646;
  --accent:     #e8974a;
  --max-w:      1040px;
  --header-h:   50px;
  --radius:     6px;
}

/* ─── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
code, pre, kbd { font-family: 'Fira Mono', 'Menlo', 'Monaco', monospace; }

/* ─── Site Header ────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(12,12,12,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
}
.site-logo {
  font-family: 'Fira Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
  transition: opacity 0.15s;
}
.site-logo:hover { opacity: 0.65; }
.logo-dot { color: var(--accent); }
.header-sep { color: var(--text-ter); margin: 0 6px; font-size: 13px; }
.header-breadcrumb-link {
  font-size: 13px;
  color: var(--text-sec);
  transition: color 0.15s;
}
.header-breadcrumb-link:hover { color: var(--text); }
.header-nav { margin-left: auto; }

/* ─── Page Wrap ──────────────────────────────────────── */
.page-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Content Grid ───────────────────────────────────── */
/* minmax(0, 1fr) is critical — prevents main column from overflowing grid */
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 185px;
  gap: 48px;
  align-items: start;
  padding: 40px 0 80px;
}

/* ─── Breadcrumb ─────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-ter);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 22px;
}
.breadcrumb a {
  color: var(--text-sec);
  transition: color 0.15s;
}
.breadcrumb a:hover { color: var(--text); }
.breadcrumb span { color: var(--text-ter); }
.breadcrumb-cur { color: var(--text-sec); }

/* ─── Skill Title ────────────────────────────────────── */
.skill-title {
  font-size: 27px;
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--text);
  margin-bottom: 9px;
  line-height: 1.2;
}
.skill-subtitle {
  font-size: 13.5px;
  color: var(--text-sec);
  line-height: 1.65;
  max-width: 540px;
  margin-bottom: 28px;
}

/* ─── Install Block ──────────────────────────────────── */
.install-block {
  background: var(--bg-lift);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
}
.install-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-ter);
  padding: 7px 14px;
  border-bottom: 1px solid var(--border);
}
.install-cmd {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  font-family: 'Fira Mono', monospace;
  font-size: 12.5px;
}
.install-prompt {
  color: var(--text-ter);
  user-select: none;
}
.install-cmd code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 12.5px;
}

/* ─── Buttons ────────────────────────────────────────── */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  color: var(--text-sec);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  margin-bottom: 28px;
}
.copy-btn:hover {
  border-color: rgba(255,255,255,0.22);
  color: var(--text);
  background: var(--bg-lift);
}
.copy-btn.copied {
  border-color: #3a6b3a;
  color: #6ab86a;
  background: rgba(58,107,58,0.1);
}

/* ─── Summary Box ────────────────────────────────────── */
.summary-box {
  border-left: 2px solid var(--border-mid);
  padding: 4px 0 4px 18px;
  margin-bottom: 36px;
}
.summary-intro {
  font-size: 13px;
  color: var(--text-sec);
  line-height: 1.7;
  margin-bottom: 12px;
}
.summary-box ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.summary-box li {
  font-size: 13px;
  color: var(--text-sec);
  padding-left: 14px;
  position: relative;
  line-height: 1.55;
}
.summary-box li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--text-ter);
}

/* ─── Prose Sections ─────────────────────────────────── */
.prose-section { margin-bottom: 44px; }

.section-heading {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-ter);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.subsection-heading {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-ter);
  margin: 22px 0 9px;
}

.prose-section > p,
.prose-section p {
  font-size: 13.5px;
  color: var(--text-sec);
  line-height: 1.7;
  margin-bottom: 14px;
}

/* ─── Tables ─────────────────────────────────────────── */
.data-table {
  table-layout: fixed;
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 12px 0 20px;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table thead th {
  text-align: left;
  background: var(--bg-muted);
  color: var(--text-ter);
  font-family: 'Fira Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-mid);
}
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-sec);
  vertical-align: top;
  line-height: 1.55;
  overflow-wrap: break-word;
  word-break: break-word;
}
.data-table tbody tr:hover td { background: rgba(255,255,255,0.016); }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table td:first-child { color: var(--text); }

/* ─── Inline Code ────────────────────────────────────── */
code {
  font-family: 'Fira Mono', monospace;
  font-size: 11.5px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  color: #c9a76d;
}

/* ─── Code Blocks ────────────────────────────────────── */
pre {
  background: var(--bg-lift);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 12px 0 20px;
  line-height: 1.6;
}
pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 12.5px;
  color: var(--text-sec);
  border-radius: 0;
}
pre .comment { color: var(--text-ter); }

/* ─── Skill Copy Block ───────────────────────────────── */
.skill-copy-block {
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  overflow: hidden;
}
.skill-copy-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
}
.skill-copy-filename {
  font-family: 'Fira Mono', monospace;
  font-size: 11.5px;
  color: var(--text-sec);
}
.skill-copy-header .copy-btn {
  margin: 0;
  padding: 4px 10px;
  font-size: 11px;
}
.skill-pre {
  margin: 0;
  border: none;
  border-radius: 0;
  background: var(--bg-lift);
  max-height: 420px;
  overflow-y: auto;
}
.skill-pre code { color: var(--text-sec); font-size: 12px; }

/* ─── FAQ ────────────────────────────────────────────── */
.faq-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-q {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 7px;
}
.faq-item p {
  font-size: 13px;
  color: var(--text-sec);
  line-height: 1.65;
  margin-bottom: 6px;
}
.faq-item p:last-child { margin-bottom: 0; }

/* ─── Sidebar ────────────────────────────────────────── */
.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  min-width: 0;
  overflow: hidden;
}
.sidebar-row {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}
.sidebar-row:first-child { padding-top: 0; }
.sidebar-row:last-child { border-bottom: none; }
.sidebar-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-ter);
  white-space: nowrap;
  padding-top: 1px;
}
.sidebar-value {
  font-size: 12px;
  color: var(--text);
  min-width: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}
.sidebar-dim { color: var(--text-sec); }
.sidebar-link {
  color: var(--accent);
  transition: opacity 0.15s;
  overflow-wrap: break-word;
  word-break: break-word;
  font-size: 12px;
}
.sidebar-link:hover { opacity: 0.7; }
.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.tag {
  display: inline-block;
  font-family: 'Fira Mono', monospace;
  font-size: 10px;
  padding: 2px 6px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-sec);
}

/* ─── Responsive ─────────────────────────────────────── */
@media (max-width: 860px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .sidebar {
    position: static;
    border-top: 1px solid var(--border);
    padding-top: 24px;
    order: 2;
  }
  main { order: 1; }
}
@media (max-width: 600px) {
  .page-wrap { padding: 0 16px; }
  .skill-title { font-size: 22px; }
  .data-table { font-size: 12px; }
  .content-grid { padding-top: 28px; }
}