@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;600;700&family=Instrument+Sans:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens (exact match to app) ── */
:root {
  --bg:          #0E1F2E;
  --surface:     #132333;
  --surface-2:   #0c1a27;
  --border:      #1E3448;
  --border-h:    #2a4a62;
  --text:        #F0F8FC;
  --muted:       #A0B8CC;
  --faint:       #5C7A90;
  --accent:      #00B4D8;
  --blue:        #4A9ECA;
  --amber:       #ffb340;
  --red:         #ff4560;
  --purple:      #a78bfa;
  --green:       #00B4D8; /* matches app C.green */
  --sidebar-w:   264px;

  /* group accent colours */
  --audit:       #00B4D8;
  --diagnose:    #a78bfa;
  --empower:     #22d3a5;
  --repair:      #ffb340;

  /* Algolia DocSearch overrides */
  --docsearch-primary-color:            var(--accent);
  --docsearch-text-color:               var(--text);
  --docsearch-spacing:                  12px;
  --docsearch-icon-color:               var(--muted);
  --docsearch-muted-color:              var(--muted);
  --docsearch-container-background:     rgba(14, 31, 46, 0.85);
  --docsearch-modal-background:         var(--surface);
  --docsearch-modal-shadow:             0 12px 40px rgba(0,0,0,0.5);
  --docsearch-searchbox-background:     var(--surface-2);
  --docsearch-searchbox-focus-background: var(--surface-2);
  --docsearch-searchbox-shadow:         inset 0 0 0 1px var(--accent);
  --docsearch-hit-color:                var(--text);
  --docsearch-hit-active-color:         var(--text);
  --docsearch-hit-background:           var(--bg);
  --docsearch-hit-shadow:               none;
  --docsearch-key-gradient:             linear-gradient(to bottom, var(--surface), var(--surface-2));
  --docsearch-key-shadow:               none;
  --docsearch-footer-background:        var(--surface-2);
  --docsearch-footer-shadow:            none;
  --docsearch-logo-color:               var(--accent);
  --docsearch-highlight-color:          var(--accent);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Instrument Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ── */
.layout {
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-brand {
  padding: 22px 20px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-brand a {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  display: block;
  letter-spacing: -0.01em;
}

.sidebar-brand .brand-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: var(--faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 3px;
}

.sidebar-search {
  padding: 14px 14px 10px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}

/* DocSearch button sizing */
.sidebar-search .DocSearch-Button {
  width: 100%;
  margin: 0;
  justify-content: flex-start;
  gap: 8px;
  border-radius: 7px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'Instrument Sans', sans-serif;
  font-size: 12px;
}

.sidebar-search .DocSearch-Button-Keys {
  display: none;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 14px 0 12px;
}

.nav-section { padding: 0 10px; margin-bottom: 18px; }

.nav-section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 0 10px;
  margin-bottom: 5px;
}

.nav-link {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.12s, background 0.12s;
  margin-bottom: 1px;
}

.nav-link:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }

.nav-link.active {
  color: var(--text);
  background: var(--surface-2);
  font-weight: 500;
}

.nav-link.active::before {
  content: '';
  display: inline-block;
  width: 4px; height: 4px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
  margin-bottom: 1px;
}

.nav-child { padding-left: 22px; font-size: 12px; }

.nav-group-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 8px;
  letter-spacing: 0.08em;
  padding: 1px 5px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
}

.sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-footer a {
  font-size: 12px;
  color: var(--faint);
  text-decoration: none;
  transition: color 0.12s;
}

.sidebar-footer a:hover { color: var(--muted); }

/* ── Main content ── */
.main {
  margin-left: var(--sidebar-w);
  padding: 52px 64px 80px;
}

.content { max-width: 760px; }

/* ── Page header ── */
.page-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.page-title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 42px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-lead {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.75;
  max-width: 620px;
  margin-bottom: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

/* ── Typography ── */
h2 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin: 44px 0 14px;
  letter-spacing: -0.01em;
}

h2:first-of-type { margin-top: 0; }

h3 {
  font-family: 'Instrument Sans', sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 32px 0 8px;
}

p { color: var(--muted); margin-bottom: 16px; }
p strong { color: var(--text); font-weight: 600; }

ul, ol { color: var(--muted); padding-left: 20px; margin-bottom: 16px; }
li { margin-bottom: 6px; }
li strong { color: var(--text); }

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--accent);
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 24px 0 32px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  transition: border-color 0.15s;
}

.card:hover { border-color: var(--border-h); }

.card-icon { font-size: 18px; margin-bottom: 10px; }

.card-title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.card-desc { font-size: 13px; color: var(--muted); line-height: 1.6; margin: 0; }

/* ── Module entries ── */
.module-entry {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: 10px;
  padding: 20px 22px;
  margin-bottom: 12px;
  transition: border-color 0.15s;
}

.module-entry:hover { border-color: var(--border-h); }

.module-entry.audit    { border-left-color: var(--audit); }
.module-entry.diagnose { border-left-color: var(--diagnose); }
.module-entry.empower  { border-left-color: var(--empower); }
.module-entry.repair   { border-left-color: var(--repair); }

.module-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }

.module-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 500;
  flex-shrink: 0;
}

.badge-audit    { background: var(--audit)15;    color: var(--audit);    border: 1px solid var(--audit)44; }
.badge-diagnose { background: var(--diagnose)15; color: var(--diagnose); border: 1px solid var(--diagnose)44; }
.badge-empower  { background: var(--empower)15;  color: var(--empower);  border: 1px solid var(--empower)44; }
.badge-repair   { background: var(--repair)15;   color: var(--repair);   border: 1px solid var(--repair)44; }

.module-name {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.module-desc { font-size: 13px; color: var(--muted); line-height: 1.65; margin: 0 0 10px; }

.module-output {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--empower);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.module-output::before { content: '→'; opacity: 0.5; flex-shrink: 0; }

/* ── Callouts ── */
.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  margin: 24px 0;
}

.callout.tip    { border-left-color: var(--empower); }
.callout.note   { border-left-color: var(--accent); }
.callout.warning { border-left-color: var(--amber); }
.callout.legal  { border-left-color: var(--purple); }

.callout-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 5px;
  color: var(--accent);
}

.callout.tip    .callout-label { color: var(--empower); }
.callout.warning .callout-label { color: var(--amber); }
.callout.legal  .callout-label { color: var(--purple); }
.callout p { margin: 0; font-size: 13px; }

/* ── Steps ── */
.steps { list-style: none; padding: 0; margin: 20px 0; counter-reset: step; }

.steps li {
  counter-increment: step;
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.steps li:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.steps li::before {
  content: counter(step);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--bg);
  background: var(--accent);
  min-width: 24px; height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-title { font-weight: 600; color: var(--text); margin-bottom: 4px; font-size: 15px; }
.step-desc  { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.6; }

/* ── Concepts ── */
.concept {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.concept:last-child { border-bottom: none; }

.concept-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
  background: var(--accent)15;
  color: var(--accent);
  border: 1px solid var(--accent)33;
}

/* ── FAQ ── */
.faq-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child { padding-top: 0; }

.faq-q { font-weight: 600; color: var(--text); margin-bottom: 8px; font-size: 15px; }
.faq-a { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 0; }
.faq-a strong { color: var(--text); }

/* ── Workflow banner ── */
.workflow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 24px 0 32px;
}

.workflow-step {
  background: var(--surface);
  padding: 16px 18px;
  text-align: center;
}

.workflow-step-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.workflow-step-label {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.workflow-step-desc {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Page nav (prev/next) ── */
.page-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  gap: 16px;
}

.page-nav-link { display: flex; flex-direction: column; gap: 4px; text-decoration: none; }
.page-nav-link:hover { text-decoration: none; }
.page-nav-link.next { align-items: flex-end; }

.page-nav-dir {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.page-nav-title { font-size: 14px; font-weight: 500; color: var(--accent); }
.page-nav-link:hover .page-nav-title { text-decoration: underline; }

/* ── Divider ── */
hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

/* ── Table ── */
table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 13px; }
th {
  text-align: left; padding: 8px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--faint); border-bottom: 1px solid var(--border);
}
td { padding: 10px 14px; color: var(--muted); border-bottom: 1px solid var(--border)55; }
td strong { color: var(--text); }
tr:last-child td { border-bottom: none; }

/* ── Mobile header (hidden on desktop) ── */
.mobile-header {
  display: none;
}

/* ── Nav backdrop (hidden on desktop) ── */
.nav-backdrop {
  display: none;
}

/* ── Responsive: tablet + mobile (<900px) ── */
@media (max-width: 899px) {

  /* Mobile top bar */
  .mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 52px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 16px;
    z-index: 400;
    flex-shrink: 0;
  }

  .mobile-header-brand {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
  }

  .mobile-nav-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    line-height: 0;
  }

  .mobile-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
  }

  /* Sidebar becomes a slide-in drawer */
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    z-index: 500;
    overflow-y: auto;
    overflow-x: hidden;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  /* Backdrop */
  .nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 499;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
  }

  .nav-backdrop.open {
    display: block;
    opacity: 1;
    pointer-events: auto;
  }

  /* Main: full width, top padding for fixed header */
  .main {
    margin-left: 0;
    padding: 68px 20px 52px;
  }

  .content { max-width: 100%; }

  /* Typography */
  .page-title { font-size: 28px; }
  .page-lead  { font-size: 15px; }

  /* Workflow: 2-up on tablet, 1-up on small mobile */
  .workflow { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }

  /* Tables: horizontal scroll instead of overflow */
  .table-wrap, table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    max-width: 100%;
  }

  td, th { white-space: normal; min-width: 100px; }

  /* Page nav: stack vertically */
  .page-nav { flex-direction: column; gap: 12px; }
  .page-nav-link.next { align-items: flex-start; }

  /* Steps: tighter gap */
  .steps li { gap: 12px; }

  /* Demo iframe: full width already, but cap height on small screens */
  iframe[title="SurfaceGX platform demo"] {
    aspect-ratio: 1 / 1;
  }
}

/* ── Mobile only (<480px) ── */
@media (max-width: 479px) {
  .main { padding: 64px 16px 48px; }
  .page-title { font-size: 24px; }
  h2 { font-size: 22px; }
  .workflow { grid-template-columns: 1fr; }
  .page-nav { gap: 8px; }
}