/* Tavra Docs — dark by default, minimal, Inter typography.
   Reference points: Vercel docs, Linear docs, Tailwind docs, Cloudflare docs.
   Chrome disappears; content is the star. */

:root {
  /* Dark by default — matches the dashboard's "imgui gear" palette. */
  --bg:               #0a0a0c;
  --bg-elev:          #101013;
  --bg-code:          #0d0d10;
  --card:             transparent;   /* cards are borderless by default */
  --card-hover:       #16161a;
  --border:           #1e1e24;
  --border-strong:    #2a2a33;

  --text:             #ededf1;
  --text-dim:         #a1a1aa;
  --muted:            #71717a;
  --muted-dim:        #52525b;

  --accent:           #7c7afb;
  --accent-hover:     #9d9bff;
  --accent-soft:      rgba(124, 122, 251, 0.11);
  --accent-border:    rgba(124, 122, 251, 0.28);

  --ok:               #4ade80;
  --ok-soft:          rgba(74, 222, 128, 0.09);
  --warn:             #fbbf24;
  --warn-soft:        rgba(251, 191, 36, 0.09);
  --info-soft:        rgba(124, 122, 251, 0.08);

  --radius-sm:        4px;
  --radius:           6px;
  --radius-lg:        10px;

  --font-sans:        "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:        "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --header-h:         56px;
}

/* Light mode — only when user explicitly requests it via OS. */
@media (prefers-color-scheme: light) {
  :root {
    --bg:               #ffffff;
    --bg-elev:          #ffffff;
    --bg-code:          #f7f7f8;
    --card:             transparent;
    --card-hover:       #f5f5f7;
    --border:           #e6e6ea;
    --border-strong:    #d4d4d8;

    --text:             #18181b;
    --text-dim:         #52525b;
    --muted:            #71717a;
    --muted-dim:        #a1a1aa;

    --accent:           #6355e0;
    --accent-hover:     #4f42c9;
    --accent-soft:      rgba(99, 85, 224, 0.08);
    --accent-border:    rgba(99, 85, 224, 0.25);

    --ok:               #16a34a;
    --ok-soft:          rgba(22, 163, 74, 0.07);
    --warn:             #d97706;
    --warn-soft:        rgba(217, 119, 6, 0.07);
    --info-soft:        rgba(99, 85, 224, 0.07);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";  /* Inter refinements */
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* headings */
h1, h2, h3, h4 { color: var(--text); font-weight: 600; letter-spacing: -0.015em; margin: 0; }

/* links */
a { color: var(--accent); text-decoration: none; transition: color 120ms; }
a:hover { color: var(--accent-hover); }

/* code / kbd */
code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--text);
}
kbd {
  font-family: var(--font-mono);
  font-size: 0.78em;
  background: var(--bg-code);
  border: 1px solid var(--border-strong);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
  font-weight: 500;
  vertical-align: 1px;
}
p code, li code { color: var(--text); }

/* ── top nav ─────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 40;
  height: var(--header-h);
  background: rgba(10, 10, 12, 0.72);
  backdrop-filter: blur(10px) saturate(1.3);
  -webkit-backdrop-filter: blur(10px) saturate(1.3);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: light) {
  .site-header { background: rgba(255, 255, 255, 0.78); }
}
.site-header-inner {
  height: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.brand span {
  color: var(--muted);
  font-weight: 400;
  margin-left: 6px;
  letter-spacing: -0.01em;
}
.header-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 20px;
}
.header-nav a {
  color: var(--text-dim);
  font-size: 13.5px;
  font-weight: 500;
  transition: color 120ms;
}
.header-nav a:hover { color: var(--text); }
.header-cta {
  color: var(--text) !important;
  padding: 5px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 12.5px !important;
}
.header-cta:hover { border-color: var(--muted); }

/* ── landing hero ────────────────────────────────────────────────── */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 96px 24px 48px;
}
.hero-eyebrow {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 20px;
  letter-spacing: -0.005em;
}
.hero h1 {
  font-size: clamp(30px, 4.4vw, 42px);
  font-weight: 600;
  letter-spacing: -0.028em;
  line-height: 1.1;
  margin: 0 0 14px;
}
.hero p {
  font-size: 16.5px;
  color: var(--text-dim);
  line-height: 1.55;
  margin: 0 0 24px;
}
.hero-cta-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* buttons */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 13.5px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 120ms, border-color 120ms, color 120ms;
  font-family: inherit;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--muted);
}

/* ── landing sections ────────────────────────────────────────────── */
.landing-section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 24px 32px;
}
.section-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--muted);
  margin: 0 0 14px;
  letter-spacing: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
/* Cells share hairlines via 1px grid gap over a border-colored container.
   Cheaper than borders-per-card + cleaner in Safari. */

.setup-card, .trouble-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  background: var(--bg);
  color: inherit;
  transition: background 140ms;
  position: relative;
}
.setup-card:hover, .trouble-card:hover {
  background: var(--card-hover);
  color: inherit;
}
.setup-card-ico, .trouble-card-ico {
  width: 22px;
  height: 22px;
  color: var(--muted);
  margin-bottom: 4px;
}
.setup-card-ico svg, .trouble-card-ico svg {
  width: 100%;
  height: 100%;
  display: block;
}
.setup-card:hover .setup-card-ico,
.trouble-card:hover .trouble-card-ico {
  color: var(--accent);
}
.setup-card-title, .trouble-card-title {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.005em;
}
.setup-card-desc, .trouble-card-desc {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 0;
}
.setup-card-cta { display: none; }  /* remove — hover reveals affordance */

/* ── article layout ──────────────────────────────────────────────── */
.doc-layout {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 24px 96px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 56px;
}
@media (max-width: 900px) {
  .doc-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-top: 20px;
  }
  .doc-sidebar { position: static !important; max-height: none !important; }
}

.doc-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  align-self: start;
  max-height: calc(100vh - var(--header-h) - 40px);
  overflow-y: auto;
}
.doc-sidebar-group { margin-bottom: 20px; }
.doc-sidebar-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  padding: 0 10px 8px;
  letter-spacing: -0.005em;
}
.doc-sidebar-link {
  display: block;
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--text-dim);
  font-size: 13.5px;
  line-height: 1.5;
  transition: color 120ms, background 120ms;
}
.doc-sidebar-link:hover {
  color: var(--text);
  background: var(--card-hover);
}
.doc-sidebar-link.active {
  color: var(--text);
  font-weight: 500;
  background: var(--accent-soft);
}

.doc-main {
  max-width: 720px;
  min-width: 0;
}
.doc-breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}
.doc-breadcrumb a { color: var(--muted); }
.doc-breadcrumb a:hover { color: var(--text-dim); }

.doc-main h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.028em;
  margin: 0 0 12px;
  line-height: 1.15;
}
.doc-lede {
  font-size: 16px;
  color: var(--text-dim);
  line-height: 1.6;
  margin: 0 0 32px;
}
.doc-main h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.018em;
  margin: 40px 0 12px;
  scroll-margin-top: 80px;
}
.doc-main h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 24px 0 8px;
}
.doc-main p { margin: 0 0 14px; color: var(--text-dim); }
.doc-main p strong { color: var(--text); font-weight: 500; }
.doc-main ul, .doc-main ol { padding-left: 20px; margin: 0 0 14px; color: var(--text-dim); }
.doc-main li { margin: 4px 0; }

/* video slot — small, unobtrusive block. Not a big empty stage. */
.video-hero {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 0 0 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  position: relative;
}
.video-hero iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-hero-placeholder {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-size: 13px;
}
.video-hero-play {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.video-hero-play svg { width: 12px; height: 12px; margin-left: 2px; }
.video-hero-label { color: var(--text-dim); font-weight: 500; }
.video-hero-sub { color: var(--muted); font-size: 12px; }

/* per-step block — borderless by default, hairline separators */
.doc-step {
  padding: 20px 0;
  border-top: 1px solid var(--border);
}
.doc-step:first-of-type { border-top: 1px solid var(--border); }
.doc-step-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}
.doc-step-num {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 20px;
}
.doc-step-title {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
  margin: 0;
  line-height: 1.4;
  flex: 1;
}
.doc-step-body { color: var(--text-dim); padding-left: 32px; }
.doc-step-body > p:last-child { margin-bottom: 0; }

/* screenshot placeholders — only show if filled. Otherwise vanish so
   empty pages don't feel under-construction. */
.screenshot-frame {
  display: none;
}
.screenshot-frame.filled {
  display: block;
  margin: 12px 0 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-code);
}
.screenshot-frame.filled img {
  width: 100%;
  height: auto;
  display: block;
}

/* callouts — flat, subtle */
.callout {
  padding: 12px 14px;
  border-radius: var(--radius);
  margin: 16px 0;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13.5px;
  line-height: 1.55;
  background: var(--info-soft);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.callout.warn    { background: var(--warn-soft); }
.callout.success { background: var(--ok-soft); }
.callout-ico { flex-shrink: 0; margin-top: 2px; color: var(--accent); }
.callout.warn    .callout-ico { color: var(--warn); }
.callout.success .callout-ico { color: var(--ok); }
.callout-ico svg { width: 15px; height: 15px; display: block; }
.callout-body { flex: 1; }
.callout-body strong { color: var(--text); font-weight: 500; }
.callout-body p { margin: 0; color: var(--text-dim); }
.callout-body p + p { margin-top: 6px; }

/* done-when checkbox */
.done-when {
  margin: 32px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 2px solid var(--ok);
  border-radius: var(--radius);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.done-when-ico {
  color: var(--ok);
  flex-shrink: 0;
  margin-top: 2px;
}
.done-when-ico svg { width: 16px; height: 16px; }
.done-when-body { flex: 1; }
.done-when-title { font-size: 13.5px; font-weight: 500; color: var(--text); margin-bottom: 3px; }
.done-when-desc { font-size: 13.5px; color: var(--text-dim); margin: 0; line-height: 1.5; }

/* prev / next nav */
.doc-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.doc-nav a {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color 120ms;
}
.doc-nav a:hover { border-color: var(--border-strong); color: var(--text); }
.doc-nav-dir { font-size: 11.5px; color: var(--muted); font-weight: 500; }
.doc-nav-title { font-size: 14px; font-weight: 500; margin-top: 4px; color: var(--text); }
.doc-nav-next { text-align: right; }
.doc-nav-empty { visibility: hidden; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
}
.site-footer a { color: var(--muted); margin: 0 10px; }
.site-footer a:hover { color: var(--text-dim); }

/* utility */
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny  { font-size: 11.5px; }

@media (max-width: 720px) {
  .hero { padding: 56px 20px 32px; }
  .card-grid { grid-template-columns: 1fr; }
  .doc-main h1 { font-size: 26px; }
  .header-nav a:not(.header-cta) { display: none; }
}