/* =========================================
   Storage Wiki — Shared Stylesheet
   Dark theme / VS Code–inspired sidebar
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;600&display=swap');

/* ---- Tokens ---- */
:root {
  --bg:          #0D1117;
  --surface:     #161B22;
  --surface2:    #1C2128;
  --border:      #30363D;
  --border-soft: #21262D;
  --primary:     #2F81F7;
  --primary-hi:  #58A6FF;
  --text:        #E6EDF3;
  --text-muted:  #8B949E;
  --text-faint:  #484F58;
  --green:       #3FB950;
  --amber:       #D29922;
  --red:         #F85149;
  --purple:      #A371F7;
  --sidebar-w:   260px;
  --topbar-h:    52px;
  --radius:      6px;
  --radius-lg:   10px;
  --mono:        'JetBrains Mono', monospace;
  --sans:        'Inter', system-ui, sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  min-height: 100vh;
}
a { color: var(--primary-hi); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ---- Layout Shell ---- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  min-height: 100vh;
}

/* ---- Topbar ---- */
.topbar {
  grid-area: topbar;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  z-index: 100;
}
.topbar-logo {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
  text-decoration: none;
}
.topbar-logo span { color: var(--primary-hi); }
.topbar-spacer { flex: 1; }

/* Search */
.search-wrap {
  position: relative;
  width: 240px;
}
.search-wrap svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
#search-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  padding: 6px 12px 6px 32px;
  outline: none;
  transition: border-color .15s;
}
#search-input:focus { border-color: var(--primary); }
#search-input::placeholder { color: var(--text-faint); }

/* Search results dropdown */
#search-results {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-height: 320px;
  overflow-y: auto;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
#search-results.active { display: block; }
.search-item {
  display: block;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  cursor: pointer;
  transition: background .1s;
}
.search-item:last-child { border-bottom: none; }
.search-item:hover { background: var(--surface); }
.search-item-title { font-size: 13px; font-weight: 500; color: var(--text); }
.search-item-path { font-size: 11px; color: var(--text-muted); margin-top: 2px; font-family: var(--mono); }
.search-empty { padding: 16px 14px; font-size: 13px; color: var(--text-muted); text-align: center; }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

/* ---- Sidebar ---- */
.sidebar {
  grid-area: sidebar;
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--topbar-h));
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px 0 32px;
  z-index: 90;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  transition: transform .25s ease;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.nav-section { margin-bottom: 4px; }
.nav-section-title {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 12px 20px 4px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .1s, background .1s, border-color .1s;
  line-height: 1.4;
}
.nav-link svg { flex-shrink: 0; opacity: .6; }
.nav-link:hover {
  color: var(--text);
  background: var(--surface2);
  text-decoration: none;
}
.nav-link.active {
  color: var(--primary-hi);
  background: rgba(47,129,247,.08);
  border-left-color: var(--primary-hi);
  font-weight: 500;
}
.nav-sub { padding-left: 36px; font-size: 12px; }

/* ---- Main Content ---- */
.main {
  grid-area: main;
  margin-top: var(--topbar-h);
  margin-left: var(--sidebar-w);
  min-height: calc(100vh - var(--topbar-h));
  padding: 48px 56px;
  max-width: 900px;
}

/* ---- Typography ---- */
h1 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 12px;
}
h2 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--text);
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-soft);
}
h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 32px 0 10px;
}
p { margin-bottom: 16px; color: var(--text); font-size: .9375rem; }
ul, ol { padding-left: 20px; margin-bottom: 16px; }
li { margin-bottom: 6px; font-size: .9375rem; }
code {
  font-family: var(--mono);
  font-size: .8125rem;
  background: var(--surface2);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--primary-hi);
}
pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 24px;
  font-family: var(--mono);
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--text);
}

/* ---- Page Hero ---- */
.page-hero {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.page-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
}
.page-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 0;
}

/* ---- Badges / Tags ---- */
.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 2px 8px;
  border-radius: 99px;
  border: 1px solid;
}
.badge-blue   { color: var(--primary-hi); border-color: rgba(47,129,247,.4); background: rgba(47,129,247,.1); }
.badge-green  { color: var(--green);      border-color: rgba(63,185,80,.4);  background: rgba(63,185,80,.1); }
.badge-amber  { color: var(--amber);      border-color: rgba(210,153,34,.4); background: rgba(210,153,34,.1); }
.badge-red    { color: var(--red);        border-color: rgba(248,81,73,.4);  background: rgba(248,81,73,.1); }
.badge-purple { color: var(--purple);     border-color: rgba(163,113,247,.4);background: rgba(163,113,247,.1); }

/* ---- Cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 24px 0;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color .15s;
}
.card:hover { border-color: var(--primary); }
.card-icon { font-size: 20px; margin-bottom: 10px; }
.card-title { font-size: .875rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.card-desc { font-size: .8125rem; color: var(--text-muted); line-height: 1.55; margin-bottom: 0; }
.card-link {
  display: block;
  text-decoration: none;
}
.card-link:hover { text-decoration: none; }

/* ---- Info / Note boxes ---- */
.callout {
  border-left: 3px solid;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
  margin: 24px 0;
  font-size: .875rem;
}
.callout-title { font-weight: 600; margin-bottom: 4px; }
.callout-info    { border-color: var(--primary); background: rgba(47,129,247,.08); }
.callout-warning { border-color: var(--amber);   background: rgba(210,153,34,.08); }
.callout-tip     { border-color: var(--green);   background: rgba(63,185,80,.08);  }
.callout-danger  { border-color: var(--red);     background: rgba(248,81,73,.08);  }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; margin: 24px 0; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
thead th {
  background: var(--surface2);
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--surface2); }

/* ---- Anchor headings ---- */
.anchor-wrap { position: relative; }
.anchor-link {
  position: absolute;
  left: -24px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  color: var(--text-faint);
  font-size: 14px;
  text-decoration: none;
  transition: opacity .15s;
}
.anchor-wrap:hover .anchor-link { opacity: 1; }

/* ---- TOC (in-page) ---- */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin: 32px 0;
  font-size: .875rem;
}
.toc-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 12px;
}
.toc ol { margin: 0; padding-left: 18px; }
.toc li { margin-bottom: 4px; }
.toc a { color: var(--text-muted); }
.toc a:hover { color: var(--primary-hi); text-decoration: none; }

/* ---- Footer ---- */
.page-footer {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  font-size: .8125rem;
  color: var(--text-faint);
  font-family: var(--mono);
}

/* ---- Index page specifics ---- */
.hero {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  max-width: 580px;
}
.hero-sub {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 28px;
}
.hero-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-faint);
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.hero-meta span { display: flex; align-items: center; gap: 6px; }

.section-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 16px;
}
.part-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-bottom: 48px;
}
.part-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: block;
  text-decoration: none;
  transition: border-color .15s, background .15s;
}
.part-card:hover {
  border-color: var(--primary);
  background: var(--surface2);
  text-decoration: none;
}
.part-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--primary);
  margin-bottom: 8px;
  font-weight: 600;
}
.part-title { font-size: .9375rem; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.part-desc { font-size: .8125rem; color: var(--text-muted); line-height: 1.55; }
.part-tags { margin-top: 12px; display: flex; gap: 6px; flex-wrap: wrap; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .main { padding: 32px 28px; }
}

@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "main";
  }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main {
    margin-left: 0;
    padding: 24px 20px;
  }
  .menu-toggle { display: flex; }
  .search-wrap { width: 180px; }
  h1 { font-size: 1.6rem; }
  .hero h1 { font-size: 1.8rem; }
  .part-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .search-wrap { display: none; }
  .main { padding: 20px 16px; }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ---- Scrollbar global ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }