/* ============================================================================
   UnitSense Docs — docs.css
   Design tokens ported from the product design system
   (unitsense/dashboard/src/app/globals.css). No Tailwind, no build step.
   ========================================================================== */

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
a { color: inherit; text-decoration: none; }

/* ─── Light Mode (default) — Riso/Editorial ─── */
:root, .light {
  --paper:        #f4f1e8;
  --paper-2:      #ece7d8;
  --ink:          #1a1f36;
  --ink-soft:     #4a4e66;
  --ink-faint:    rgba(26, 31, 54, 0.55);

  --pink:            #e84a9f;
  --pink-deep:       #a83368;
  --chartreuse:      #d4ff00;
  --chartreuse-deep: #6a8000;

  --rule:         rgba(26, 31, 54, 0.12);
  --rule-soft:    rgba(26, 31, 54, 0.06);
  --rule-strong:  var(--ink);

  /* Buttons — mirror product component tokens */
  --btn-primary-bg:       var(--ink);
  --btn-primary-fg:       var(--chartreuse);
  --btn-primary-bg-hover: var(--pink);
  --btn-primary-fg-hover: var(--paper);
  --btn-ghost-fg:         var(--ink);
  --btn-ghost-border:     var(--ink);

  /* Code surfaces */
  --code-bg:      #14182b;
  --code-fg:      #f4f1e8;
  --code-inline:  rgba(26, 31, 54, 0.06);

  --radius:       2px;

  /* Type roles */
  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body:    'Manrope', system-ui, sans-serif;
  --font-figures: 'DM Mono', ui-monospace, monospace;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  --sidebar-w:    260px;
  --topbar-h:     56px;
  --content-max:  760px;
}

/* ─── Dark Mode — Riso/Editorial ─── */
.dark {
  --paper:        #14182b;
  --paper-2:      #0c0f1d;
  --ink:          #f4f1e8;
  --ink-soft:     #b3b1a6;
  --ink-faint:    rgba(244, 241, 232, 0.45);

  --pink:            #e84a9f;
  --pink-deep:       #f06bb0;
  --chartreuse:      #d4ff00;
  --chartreuse-deep: #d4ff00;

  --rule:         #2a2f4a;
  --rule-soft:    #1d2237;
  --rule-strong:  var(--ink);

  --btn-primary-bg:       var(--ink);
  --btn-primary-fg:       var(--paper);
  --btn-primary-bg-hover: var(--pink);
  --btn-primary-fg-hover: var(--paper);
  --btn-ghost-fg:         var(--ink);
  --btn-ghost-border:     var(--ink);

  --code-bg:      #0c0f1d;
  --code-fg:      #f4f1e8;
  --code-inline:  rgba(244, 241, 232, 0.07);
}

/* ─── Base ─── */
body {
  font-family: var(--font-body), system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 200ms ease, color 200ms ease;
}

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

/* ─── Buttons (us-btn) ─── */
.us-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border: 1px solid transparent; border-radius: var(--radius);
  font-family: var(--font-body); font-size: 14px; font-weight: 700;
  letter-spacing: -0.01em; cursor: pointer; transition: background .15s, color .15s;
}
.us-btn-primary { background: var(--btn-primary-bg); color: var(--btn-primary-fg); }
.us-btn-primary:hover { background: var(--btn-primary-bg-hover); color: var(--btn-primary-fg-hover); }
.us-btn-ghost { background: transparent; color: var(--btn-ghost-fg); border-color: var(--btn-ghost-border); }
.us-btn-ghost:hover { background: var(--btn-ghost-border); color: var(--paper); }

/* ============================================================================
   Layout: top bar + left sidebar + content
   ========================================================================== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 20px;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.topbar .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.topbar .brand svg { width: 26px; height: 26px; display: block; }
.topbar .brand-name { font-family: var(--font-display); font-weight: 800; font-size: 16px; letter-spacing: -0.02em; }
.topbar .brand-sub {
  font-family: var(--font-mono); font-size: 9px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint);
}
.topbar-spacer { flex: 1; }
.topbar-link {
  font-size: 13px; font-weight: 600; color: var(--ink-soft);
  padding: 6px 10px; border-radius: var(--radius);
}
.topbar-link:hover { color: var(--ink); }

/* Theme toggle */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border: 1px solid var(--rule);
  border-radius: var(--radius); background: transparent; color: var(--ink);
  cursor: pointer; transition: border-color .15s, background .15s;
}
.theme-toggle:hover { border-color: var(--rule-strong); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
.dark .theme-toggle .icon-sun { display: block; }
.dark .theme-toggle .icon-moon { display: none; }

/* Tenant slug control */
.slug-btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 34px; padding: 0 12px;
  border: 1px solid var(--rule); border-radius: var(--radius);
  background: transparent; color: var(--ink-soft); cursor: pointer;
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  transition: border-color .15s, color .15s;
}
.slug-btn:hover { border-color: var(--rule-strong); color: var(--ink); }
.slug-btn.slug-set { color: var(--ink); border-color: var(--rule-strong); }
.slug-btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.slug-btn-label { max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Inline <slug> placeholder — click to set */
.slug-ph {
  cursor: pointer; border-bottom: 1px dotted currentColor;
  font-family: var(--font-mono);
}
.slug-ph:not(.slug-set) { color: var(--pink); }
/* Avoid a double underline when a slug sits inside a link */
.inline .slug-ph { border-bottom: none; }

/* Clickable URL that reads like one */
.tokens-link { font-family: var(--font-mono); font-size: 0.92em; word-break: break-all; }

/* Mobile nav button */
.nav-toggle {
  display: none; align-items: center; justify-content: center;
  width: 34px; height: 34px; border: 1px solid var(--rule);
  border-radius: var(--radius); background: transparent; color: var(--ink); cursor: pointer;
}
.nav-toggle svg { width: 18px; height: 18px; }

/* Shell */
.shell { display: flex; align-items: flex-start; }

/* Sidebar */
.sidebar {
  position: sticky; top: var(--topbar-h);
  width: var(--sidebar-w); flex-shrink: 0;
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  border-right: 1px solid var(--rule);
  padding: 28px 20px 48px;
}
.sidebar-group { margin-bottom: 26px; }
.sidebar-group-label {
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint);
  padding: 0 10px; margin-bottom: 8px;
}
.sidebar-link {
  display: block; padding: 7px 10px; border-radius: var(--radius);
  font-size: 14px; font-weight: 500; color: var(--ink-soft);
  border-left: 2px solid transparent;
}
.sidebar-link:hover { color: var(--ink); background: var(--rule-soft); }
.sidebar-link.active {
  color: var(--ink); font-weight: 700;
  background: var(--rule-soft); border-left-color: var(--pink);
}
.sidebar-link.soon { color: var(--ink-faint); cursor: default; }
.sidebar-link.soon:hover { background: transparent; color: var(--ink-faint); }
.sidebar-link .soon-tag {
  font-family: var(--font-mono); font-size: 9px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-faint);
  border: 1px solid var(--rule); border-radius: var(--radius);
  padding: 1px 5px; margin-left: 6px; vertical-align: middle;
}

/* Content */
.content {
  flex: 1; min-width: 0;
  padding: 48px 56px 120px;
}
.content-inner { max-width: var(--content-max); margin: 0 auto; }

/* ============================================================================
   Content typography
   ========================================================================== */
.content h1 {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(30px, 4vw, 40px); line-height: 1.1; letter-spacing: -0.03em;
  margin-bottom: 14px;
}
.content h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 24px; line-height: 1.2; letter-spacing: -0.02em;
  margin: 52px 0 16px; padding-top: 8px;
}
.content h3 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 17px; letter-spacing: -0.01em; margin: 32px 0 10px;
}
.content p { margin-bottom: 16px; color: var(--ink-soft); }
.content .lead { font-size: 18px; line-height: 1.6; color: var(--ink-soft); margin-bottom: 28px; }
.content a.inline { color: var(--ink); font-weight: 600; border-bottom: 1.5px solid var(--pink); }
.content a.inline:hover { color: var(--pink-deep); }
.content ul, .content ol { margin: 0 0 18px 22px; color: var(--ink-soft); }
.content li { margin-bottom: 7px; }
.content strong { color: var(--ink); font-weight: 700; }
.content hr { border: none; border-top: 1px solid var(--rule); margin: 40px 0; }

/* Eyebrow label */
.eyebrow {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--pink);
  margin-bottom: 12px;
}

/* Inline code */
code {
  font-family: var(--font-mono); font-size: 0.86em;
  background: var(--code-inline); padding: 2px 6px; border-radius: var(--radius);
}

/* ============================================================================
   Code blocks + copy button
   ========================================================================== */
.code-block {
  position: relative; margin: 0 0 20px;
  background: var(--code-bg); border: 1px solid var(--rule);
  border-radius: var(--radius); overflow: hidden;
}
.code-block pre {
  margin: 0; padding: 16px 52px 16px 18px; overflow-x: auto;
}
.code-block code {
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7;
  background: transparent; padding: 0; color: var(--code-fg);
  white-space: pre;
}
.code-block .comment { color: rgba(244, 241, 232, 0.4); }
.copy-btn {
  position: absolute; top: 10px; right: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  background: rgba(244, 241, 232, 0.08); border: 1px solid rgba(244, 241, 232, 0.14);
  border-radius: var(--radius); color: rgba(244, 241, 232, 0.7);
  cursor: pointer; transition: background .15s, color .15s;
}
.copy-btn:hover { background: rgba(244, 241, 232, 0.16); color: #f4f1e8; }
.copy-btn svg { width: 15px; height: 15px; }
.copy-btn .icon-check { display: none; color: var(--chartreuse); }
.copy-btn.copied .icon-copy { display: none; }
.copy-btn.copied .icon-check { display: block; }

/* ============================================================================
   OS / language tabs
   ========================================================================== */
.tabs { margin: 0 0 20px; }
.tab-bar {
  display: flex; gap: 4px; border-bottom: 1px solid var(--rule); margin-bottom: 0;
}
.tab-btn {
  font-family: var(--font-body); font-size: 13px; font-weight: 600;
  color: var(--ink-faint); background: transparent; border: none;
  padding: 9px 14px; cursor: pointer; border-bottom: 2px solid transparent;
  margin-bottom: -1px; transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--ink-soft); }
.tab-btn.active { color: var(--ink); border-bottom-color: var(--pink); }
.tab-panel { display: none; padding-top: 16px; }
.tab-panel.active { display: block; }

/* ============================================================================
   Steps
   ========================================================================== */
.step { position: relative; padding-left: 52px; padding-bottom: 28px; }
.step::before {
  content: ''; position: absolute; left: 15px; top: 34px; bottom: 0;
  width: 1px; background: var(--rule);
}
.step:last-child::before { display: none; }
.step-num {
  position: absolute; left: 0; top: 0;
  width: 32px; height: 32px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  background: var(--ink); color: var(--chartreuse);
  font-family: var(--font-figures); font-size: 14px; font-weight: 500;
}
.dark .step-num { color: var(--paper); }
.step h3 { margin: 4px 0 8px; }
.step p:last-child { margin-bottom: 0; }

/* ============================================================================
   Callouts
   ========================================================================== */
.callout {
  display: flex; gap: 12px; padding: 16px 18px; margin: 0 0 22px;
  border: 1px solid var(--rule); border-left: 3px solid var(--ink-soft);
  border-radius: var(--radius); background: var(--rule-soft);
}
.callout .callout-ic { flex-shrink: 0; width: 18px; height: 18px; color: var(--ink-soft); margin-top: 2px; }
.callout .callout-body { font-size: 14px; }
.callout .callout-body p { margin: 0; color: var(--ink-soft); }
.callout .callout-body strong { color: var(--ink); }
.callout.privacy { border-left-color: var(--pink); }
.callout.privacy .callout-ic { color: var(--pink); }
.callout.note { border-left-color: var(--chartreuse-deep); }
.callout.note .callout-ic { color: var(--chartreuse-deep); }

/* ============================================================================
   Home hero / cards
   ========================================================================== */
.hero { padding: 16px 0 8px; }
.hero h1 { margin-bottom: 18px; }
.hero .lead { max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 44px; }
.doc-card {
  display: block; padding: 22px;
  border: 1px solid var(--rule); border-radius: var(--radius);
  background: var(--paper); transition: border-color .15s, transform .15s;
}
.doc-card:hover { border-color: var(--rule-strong); transform: translateY(-2px); }
.doc-card .doc-card-label {
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--pink); margin-bottom: 8px;
}
.doc-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 17px; margin: 0 0 6px; }
.doc-card p { font-size: 14px; color: var(--ink-soft); margin: 0; }

/* Page footer nav */
.page-nav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--rule);
}
.page-nav a {
  font-size: 14px; font-weight: 600; color: var(--ink-soft);
}
.page-nav a:hover { color: var(--ink); }

/* ============================================================================
   Mobile sidebar backdrop
   ========================================================================== */
.backdrop {
  display: none; position: fixed; inset: var(--topbar-h) 0 0 0;
  background: rgba(0,0,0,0.4); z-index: 40;
}

/* ============================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .topbar-link { display: none; }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; z-index: 45;
    height: calc(100vh - var(--topbar-h));
    background: var(--paper);
    transform: translateX(-100%); transition: transform .2s ease;
  }
  .sidebar.open { transform: translateX(0); }
  .backdrop.open { display: block; }
  .content { padding: 32px 24px 96px; }
  .card-grid { grid-template-columns: 1fr; }
}