/* ─── Design Tokens ─────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&family=DM+Sans:ital,opsz,wght@0,9..40,300..700;1,9..40,300..700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Palette — near-black + warm ivory + amber */
  --ink:          #0e0c09;        /* page background */
  --ink-soft:     #1a1711;        /* sidebar bg */
  --ink-mid:      #2b261e;        /* borders, cards */
  --ink-rule:     #352f25;        /* subtle dividers */
  --parchment:    #f5f0e8;        /* main text */
  --parchment-dim:#b8ad9a;        /* muted text */
  --parchment-faint:#6e6051;      /* very muted */
  --amber:        #d4933a;        /* primary accent */
  --amber-light:  #e8b264;        /* accent hover */
  --amber-glow:   rgba(212,147,58,0.12);
  --amber-faint:  rgba(212,147,58,0.06);
  --green:        #5a8a50;        /* success / badge */
  --danger:       #a84040;

  /* Layout */
  --header-h:     56px;
  --sidebar-w:    268px;
  --toc-w:        220px;
  --content-max:  740px;

  /* Typography */
  --font-serif:   'Fraunces', Georgia, serif;
  --font-sans:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Easing */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.7, 0, 0.84, 0);
}

/* ─── Reset & Base ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--ink);
  color: var(--parchment);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ─── Scrollbar ──────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--ink-rule); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--parchment-faint); }

/* ─── Overlay ────────────────────────────────────────────────────────── */
.overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(14,12,9,0.7);
  backdrop-filter: blur(4px);
  z-index: 40;
}
.overlay.visible { display: block; }

/* ─── Header ─────────────────────────────────────────────────────────── */
header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(14,12,9,0.88);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--ink-mid);
  z-index: 50;
  display: flex; align-items: center;
}

.header-inner {
  width: 100%;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0 1.25rem 0 0;
}

.header-left {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0 1.25rem;
}

/* Hamburger */
.menu-btn {
  display: none;
  flex-direction: column; justify-content: center;
  gap: 4px;
  width: 36px; height: 36px;
  border: none; background: none; cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: background 0.2s;
}
.menu-btn:hover { background: var(--ink-mid); }
.menu-btn span {
  display: block;
  height: 1.5px;
  background: var(--parchment-dim);
  border-radius: 1px;
  transition: transform 0.25s var(--ease-out), opacity 0.2s;
}

/* Wordmark */
.wordmark {
  display: flex; align-items: baseline; gap: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  letter-spacing: -0.01em;
  color: var(--parchment);
}
.wordmark-me {
  color: var(--amber);
  font-optical-sizing: auto;
  font-variation-settings: 'SOFT' 100, 'WONK' 1;
}
.wordmark-sep {
  color: var(--ink-rule);
  margin: 0 0.25rem;
  font-weight: 300;
}
.wordmark-skills {
  color: var(--parchment-dim);
  font-weight: 400;
  font-style: italic;
  font-size: 0.95rem;
}

/* Search */
.header-center { display: flex; align-items: center; }
.search-wrap {
  display: flex; align-items: center; gap: 0.6rem;
  width: 100%; max-width: 420px;
  height: 34px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-mid);
  border-radius: 8px;
  padding: 0 0.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  cursor: text;
}
.search-wrap:focus-within {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-faint);
}
.search-icon { width: 14px; height: 14px; color: var(--parchment-faint); flex-shrink: 0; }
#searchInput {
  flex: 1;
  background: none; border: none; outline: none;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--parchment);
  min-width: 0;
}
#searchInput::placeholder { color: var(--parchment-faint); }
.search-wrap kbd {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--parchment-faint);
  background: var(--ink-mid);
  border: 1px solid var(--ink-rule);
  border-radius: 4px;
  padding: 1px 5px;
  flex-shrink: 0;
}

/* Header right */
.header-right { display: flex; align-items: center; gap: 0.5rem; }
.header-link {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--parchment-dim);
  text-decoration: none;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all 0.18s;
}
.header-link:hover {
  color: var(--parchment);
  border-color: var(--ink-mid);
  background: var(--ink-soft);
}
.header-link svg { width: 14px; height: 14px; }

/* ─── Sidebar ─────────────────────────────────────────────────────────── */
aside#sidebar {
  position: fixed;
  top: var(--header-h); bottom: 0; left: 0;
  width: var(--sidebar-w);
  background: var(--ink-soft);
  border-right: 1px solid var(--ink-mid);
  z-index: 30;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.sidebar-inner {
  display: flex; flex-direction: column;
  min-height: 100%;
  padding: 1.75rem 0 2rem;
}

.sidebar-section {
  padding: 0 0.75rem;
  margin-bottom: 1.5rem;
}

.sidebar-label {
  font-size: 0.67rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--parchment-faint);
  padding: 0 0.75rem;
  margin-bottom: 0.5rem;
}

/* Nav links */
.nav-link {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.42rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--parchment-dim);
  text-decoration: none;
  transition: all 0.15s;
  position: relative;
}
.nav-link svg { width: 13px; height: 13px; flex-shrink: 0; opacity: 0.6; }
.nav-link:hover {
  color: var(--parchment);
  background: var(--ink-mid);
}
.nav-link:hover svg { opacity: 1; }
.nav-link.active {
  color: var(--amber-light);
  background: var(--amber-faint);
}
.nav-link.active::before {
  content: '';
  position: absolute; left: -0.75rem;
  top: 50%; transform: translateY(-50%);
  width: 2px; height: 60%;
  background: var(--amber);
  border-radius: 0 2px 2px 0;
}
.nav-link.active svg { opacity: 1; color: var(--amber); }

/* Skill step number badge */
.nav-step {
  margin-left: auto;
  display: flex; align-items: center; justify-content: center;
  width: 18px; height: 18px;
  border-radius: 4px;
  background: var(--ink-mid);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--parchment-faint);
  flex-shrink: 0;
  transition: all 0.15s;
}
.nav-link.active .nav-step,
.nav-link:hover .nav-step {
  background: var(--amber-glow);
  color: var(--amber-light);
}

/* Sidebar footer */
.sidebar-footer {
  margin-top: auto;
  padding: 1.5rem 1.5rem 0;
  border-top: 1px solid var(--ink-rule);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem;
}
.sidebar-footer p {
  font-size: 0.72rem;
  color: var(--parchment-faint);
  line-height: 1.5;
}
.sidebar-footer em { font-style: italic; }
.version-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--green);
  background: rgba(90,138,80,0.12);
  border: 1px solid rgba(90,138,80,0.2);
  border-radius: 4px;
  padding: 2px 6px;
  flex-shrink: 0;
}

/* ─── Main Content Area ──────────────────────────────────────────────── */
main#main {
  margin-left: var(--sidebar-w);
  padding-top: var(--header-h);
  min-height: 100vh;
  display: flex;
  position: relative;
}

.main-inner {
  flex: 1;
  max-width: calc(var(--content-max) + var(--toc-w) + 6rem);
  padding: 3.5rem 3rem 5rem calc(3rem + 1px);
  min-width: 0;
}

/* ─── Content (Prose) ─────────────────────────────────────────────────── */
.prose {
  animation: fadein 0.35s var(--ease-out) both;
  max-width: var(--content-max);
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Page title */
.prose .page-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--amber);
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}
.prose .page-eyebrow::before {
  content: '';
  display: inline-block;
  width: 16px; height: 1.5px;
  background: var(--amber);
  border-radius: 1px;
}

.prose h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--parchment);
  margin-bottom: 1.25rem;
  font-optical-sizing: auto;
}

.prose .page-lead {
  font-size: 1.1rem;
  color: var(--parchment-dim);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--ink-rule);
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--parchment);
  margin: 2.75rem 0 0.9rem;
  line-height: 1.3;
}

.prose h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  font-style: italic;
  color: var(--parchment);
  margin: 2rem 0 0.65rem;
  line-height: 1.35;
}

.prose h4 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--amber);
  margin: 1.5rem 0 0.5rem;
}

.prose p {
  font-size: 0.985rem;
  color: var(--parchment-dim);
  line-height: 1.8;
  margin-bottom: 1.15rem;
}

.prose strong {
  color: var(--parchment);
  font-weight: 600;
}

.prose em { font-style: italic; color: var(--parchment); }

.prose ul, .prose ol {
  margin: 0.75rem 0 1.25rem;
  padding-left: 1.5rem;
}
.prose li {
  font-size: 0.975rem;
  color: var(--parchment-dim);
  line-height: 1.75;
  margin-bottom: 0.4rem;
}
.prose li::marker { color: var(--amber); }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }

/* Nested lists */
.prose li > ul, .prose li > ol {
  margin-top: 0.35rem; margin-bottom: 0;
}

/* Blockquotes */
.prose blockquote {
  margin: 1.75rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--amber-faint);
  border-left: 3px solid var(--amber);
  border-radius: 0 8px 8px 0;
  position: relative;
}
.prose blockquote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--parchment);
  margin: 0;
  line-height: 1.65;
}

/* Code inline */
.prose code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: var(--amber-light);
  background: var(--ink-mid);
  border: 1px solid var(--ink-rule);
  border-radius: 4px;
  padding: 0.15em 0.4em;
}

/* Code block wrapper — positions the copy button WITHOUT scrolling */
.pre-wrap {
  position: relative;
  margin: 1.5rem 0;
}

/* Code blocks */
.prose pre {
  margin: 0;            /* wrapper owns the margin now */
  padding: 1.25rem 1.5rem;
  background: var(--ink-soft);
  border: 1px solid var(--ink-mid);
  border-radius: 10px;
  overflow-x: auto;
}
.prose pre code {
  font-family: var(--font-mono);
  font-size: 0.845rem;
  color: var(--parchment-dim);
  background: none;
  border: none;
  padding: 0;
  line-height: 1.65;
}

/* Copy button — anchored to wrapper, never scrolls */
.copy-btn {
  position: absolute; top: 0.75rem; right: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--parchment-faint);
  background: var(--ink-mid);
  border: 1px solid var(--ink-rule);
  border-radius: 5px;
  padding: 3px 8px;
  cursor: pointer;
  transition: all 0.15s;
  z-index: 1;           /* sits above the pre */
}
.copy-btn:hover { color: var(--parchment); border-color: var(--parchment-faint); }
.copy-btn.copied { color: var(--green); border-color: rgba(90,138,80,0.3); }

/* Tables */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
.prose th {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--parchment-faint);
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--ink-rule);
  text-align: left;
}
.prose td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--ink-mid);
  color: var(--parchment-dim);
  font-size: 0.875rem;
  vertical-align: top;
}
.prose tr:last-child td { border-bottom: none; }
.prose td:first-child { color: var(--parchment); font-weight: 500; }

/* Horizontal rules / section dividers */
.prose hr {
  border: none;
  border-top: 1px solid var(--ink-rule);
  margin: 2.5rem 0;
}

/* Checkboxes in lists */
.prose li input[type=checkbox] {
  accent-color: var(--amber);
  margin-right: 0.4rem;
  width: 13px; height: 13px;
}

/* ─── Principle Callout Card ─────────────────────────────────────────── */
.principle-card {
  display: flex; gap: 1rem;
  background: var(--amber-faint);
  border: 1px solid rgba(212,147,58,0.15);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
}
.principle-card .pc-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  line-height: 1.4;
}
.principle-card p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--parchment);
  margin: 0;
  line-height: 1.65;
}

/* ─── Skills Grid (Home) ─────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.skill-card {
  background: var(--ink-soft);
  border: 1px solid var(--ink-mid);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: all 0.2s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.skill-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--amber-faint) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.25s;
}
.skill-card:hover {
  border-color: var(--amber);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3), 0 0 0 1px var(--amber-faint);
}
.skill-card:hover::after { opacity: 1; }
.skill-card-step {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--amber);
  margin-bottom: 0.6rem;
  letter-spacing: 0.05em;
}
.skill-card-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--parchment);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}
.skill-card-cmd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--parchment-faint);
}

/* ─── Installation Page ──────────────────────────────────────────────── */
.install-platform {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--parchment-faint);
  margin: 2rem 0 0.65rem;
}
.install-platform svg { width: 15px; height: 15px; }

/* ─── TOC ────────────────────────────────────────────────────────────── */
.toc-panel {
  position: sticky;
  top: calc(var(--header-h) + 3rem);
  align-self: flex-start;
  width: var(--toc-w);
  flex-shrink: 0;
  padding: 0 0 2rem 2rem;
  display: none; /* shown via JS on wide screens */
}
.toc-label {
  font-size: 0.67rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--parchment-faint);
  margin-bottom: 0.75rem;
}
#tocNav a {
  display: block;
  font-size: 0.8rem;
  color: var(--parchment-faint);
  text-decoration: none;
  padding: 0.25rem 0.75rem;
  border-left: 1px solid var(--ink-rule);
  line-height: 1.4;
  transition: all 0.15s;
}
#tocNav a:hover { color: var(--parchment); border-left-color: var(--amber); }
#tocNav a.toc-active { color: var(--amber-light); border-left-color: var(--amber); }
#tocNav a[data-level="3"] { padding-left: 1.5rem; font-size: 0.76rem; }

/* ─── Doc Pager ──────────────────────────────────────────────────────── */
.doc-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ink-rule);
  max-width: var(--content-max);
}
.pager-btn {
  display: flex; align-items: center; gap: 0.875rem;
  background: var(--ink-soft);
  border: 1px solid var(--ink-mid);
  border-radius: 8px;
  padding: 0.875rem 1.1rem;
  cursor: pointer;
  text-align: left;
  transition: all 0.18s;
  color: inherit;
  flex: 1; max-width: calc(50% - 0.5rem);
}
.pager-btn:hover {
  border-color: var(--amber);
  background: var(--amber-faint);
}
.pager-btn svg { width: 16px; height: 16px; color: var(--parchment-faint); flex-shrink: 0; transition: color 0.15s; }
.pager-btn:hover svg { color: var(--amber); }
.pager-btn small { display: block; font-size: 0.7rem; color: var(--parchment-faint); margin-bottom: 0.15rem; }
.pager-btn strong { display: block; font-size: 0.875rem; font-weight: 600; color: var(--parchment); }
.pager-btn--next { text-align: right; flex-direction: row-reverse; }

/* ─── Search Results ─────────────────────────────────────────────────── */
.search-results {
  display: none;
  position: fixed;
  top: calc(var(--header-h) + 8px);
  left: 50%;
  transform: translateX(-32%);
  width: min(500px, 90vw);
  background: var(--ink-soft);
  border: 1px solid var(--ink-mid);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  z-index: 200;
  overflow: hidden;
  animation: fadein 0.2s var(--ease-out);
}
.search-results.visible { display: block; }
.search-result-item {
  display: flex; align-items: flex-start; gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  cursor: pointer;
  border-bottom: 1px solid var(--ink-mid);
  transition: background 0.1s;
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--ink-mid); }
.search-result-item.focused { background: var(--amber-faint); }
.sr-step { font-family: var(--font-mono); font-size: 0.65rem; color: var(--amber); flex-shrink: 0; padding-top: 2px; }
.sr-title { font-size: 0.875rem; font-weight: 600; color: var(--parchment); margin-bottom: 0.15rem; }
.sr-snippet { font-size: 0.78rem; color: var(--parchment-faint); line-height: 1.5; }
.sr-snippet mark { background: none; color: var(--amber-light); font-weight: 600; }
.search-empty {
  padding: 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--parchment-faint);
}

/* ─── Responsive ─────────────────────────────────────────────────────── */
@media (min-width: 1200px) {
  .toc-panel { display: block; }
  .main-inner { max-width: none; }
}

@media (max-width: 1000px) {
  .menu-btn { display: flex; }
  header .header-inner {
    grid-template-columns: auto 1fr auto;
  }
  aside#sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
    z-index: 45;
  }
  aside#sidebar.open {
    transform: translateX(0);
    box-shadow: 20px 0 60px rgba(0,0,0,0.4);
  }
  main#main {
    margin-left: 0;
  }
  .main-inner {
    padding: 2.5rem 1.5rem 4rem;
  }
}

@media (max-width: 600px) {
  :root { --header-h: 52px; }
  .wordmark-skills { display: none; }
  .header-link span { display: none; }
  .search-wrap kbd { display: none; }
  .main-inner { padding: 2rem 1.1rem 3rem; }
  .doc-pager { flex-direction: column; }
  .pager-btn { max-width: 100%; }
}