/* CadToPage brand layer. Everything here is scoped under body[data-site="cad"]
   and is loaded by the shared shell as /brand.css (fonts come from
   /brand-fonts.css). The workspace rules style the real converter/viewer
   controls around the engine mounts (#cad-file, #cad-open, #cad-pdf,
   #cad-status, #cad-info, #cad); they never touch engine behavior.
   Squared edges, graphite toolbar, paper stage, attached resource inspector.
   Vertical rhythm uses padding-block / margin-block longhands; insets are
   never zeroed with shorthand padding. No body overflow rules, no global
   [hidden] overrides, no decorative grids or neon. */

/* --- tokens ------------------------------------------------------------- */

body[data-site="cad"] {
  --brand-background: #EDF0F2;
  --brand-paper: #ffffff;
  --brand-graphite: #243641;
  --brand-ink: #172A35;
  --brand-accent: #BA421C;
  --brand-border: #C6CFD6;
  --brand-muted: #54646E;
  --brand-font-display: "Barlow Condensed", "Arial Narrow", system-ui, sans-serif;
  --brand-font-ui: "Barlow", system-ui, sans-serif;
  --brand-font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  background: var(--brand-background);
  color: var(--brand-ink);
  color-scheme: light;
  font-family: var(--brand-font-ui);
  line-height: 1.55;
}

/* --- column and shell ---------------------------------------------------- */

body[data-site="cad"] .shell {
  padding-inline: max(1rem, env(safe-area-inset-left)) max(1rem, env(safe-area-inset-right));
}

body[data-site="cad"] a { color: inherit; }
body[data-site="cad"] a:focus-visible,
body[data-site="cad"] button:focus-visible,
body[data-site="cad"] input:focus-visible,
body[data-site="cad"] summary:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 2px;
}

body[data-site="cad"] .skip {
  background: var(--brand-ink);
  color: #fff;
  border-color: var(--brand-accent);
}

/* --- typography ---------------------------------------------------------- */

body[data-site="cad"]:not(.guide-page) .page-title {
  font-family: var(--brand-font-display);
  font-weight: 700;
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  line-height: 1.05;
  margin-block: 0.75rem 0.5rem;
  max-width: 46rem;
}
body[data-site="cad"] .page-lead {
  font-size: 1.0625rem;
  color: var(--brand-muted);
  margin-block: 0 1rem;
  max-width: 46rem;
}

/* Widget-first rhythm: tight above the fold on root pages only. */
body[data-site="cad"]:not(.guide-page) main.shell {
  padding-block: 12px 48px;
}

body[data-site="cad"] main h2 {
  font-family: var(--brand-font-display);
  font-weight: 600;
  font-size: 1.75rem;
  line-height: 1.1;
  margin-block: 0 0.6rem;
}
body[data-site="cad"] main h3 {
  font-weight: 600;
  font-size: 1.0625rem;
  margin-block: 0 0.5rem;
}
body[data-site="cad"] main p,
body[data-site="cad"] main ul,
body[data-site="cad"] main ol { margin-block: 0 0.75rem; }
body[data-site="cad"] main code {
  font-family: var(--brand-font-mono);
  font-size: 0.875em;
}

/* --- header and footer ---------------------------------------------------- */

body[data-site="cad"] .site-header {
  background: var(--brand-paper);
  border-block-end: 1px solid var(--brand-border);
  padding-block: 0.75rem;
}
body[data-site="cad"] .site-header .brand {
  font-family: var(--brand-font-display);
  font-weight: 700;
  font-size: 1.3125rem;
  color: var(--brand-ink);
}
body[data-site="cad"] .site-header .badge {
  font-family: var(--brand-font-mono);
  font-size: 0.6875rem;
  border-color: var(--brand-border);
  color: var(--brand-muted);
}
body[data-site="cad"] .site-header nav a {
  text-decoration: none;
  font-weight: 500;
  padding-block: 2px;
  border-block-end: 2px solid transparent;
}
body[data-site="cad"] .site-header nav a:hover { border-block-end-color: var(--brand-accent); }

body[data-site="cad"] .site-footer {
  background: var(--brand-ink);
  color: #D7DEE3;
  border-block: 0;
  padding-block: 1.5rem 2rem;
  font-size: 0.875rem;
}
body[data-site="cad"] .site-footer a { color: #fff; }

/* --- workspace: graphite toolbar + paper stage + resource inspector ------- */

body[data-site="cad"] .cad-workspace {
  background: var(--brand-paper);
  border: 1px solid var(--brand-border);
  border-radius: 0;
}

body[data-site="cad"] .cad-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  background: var(--brand-graphite);
  color: #EDF0F2;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
}
body[data-site="cad"] .cad-toolbar-label {
  font-family: var(--brand-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #AEBCC4;
}
body[data-site="cad"] .cad-toolbar-hint {
  font-size: 0.78125rem;
  color: #AEBCC4;
}

body[data-site="cad"] #cad-file {
  font-family: var(--brand-font-mono);
  font-size: 0.78125rem;
  color: #EDF0F2;
  min-width: 0;
  max-width: 100%;
}
body[data-site="cad"] #cad-file::file-selector-button {
  font: inherit;
  font-weight: 600;
  color: #EDF0F2;
  background: transparent;
  border: 1px solid #4A5E6B;
  border-radius: 2px;
  padding: 0.65rem 0.75rem;
  margin-inline-end: 0.5rem;
  cursor: pointer;
}
body[data-site="cad"] #cad-file::file-selector-button:hover { border-color: #6B8090; }

body[data-site="cad"] .cad-toolbar button {
  font: inherit;
  font-weight: 600;
  color: #EDF0F2;
  background: transparent;
  border: 1px solid #4A5E6B;
  border-radius: 2px;
  padding: 0.65rem 1rem;
  cursor: pointer;
}
body[data-site="cad"] .cad-toolbar button:hover:not(:disabled) { border-color: #6B8090; }
body[data-site="cad"] #cad-pdf {
  background: var(--brand-accent);
  border-color: var(--brand-accent);
  color: #fff;
}
body[data-site="cad"] #cad-pdf:hover:not(:disabled) {
  background: #9A3A18;
  border-color: #9A3A18;
}
body[data-site="cad"] .cad-toolbar button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

body[data-site="cad"] .cad-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
}

/* Stage: the actual engine mount keeps its sizing contract. */
body[data-site="cad"] .cad-stage {
  min-width: 0;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-inline-end: 1px solid var(--brand-border);
}
body[data-site="cad"] .cad-stage-title,
body[data-site="cad"] .cad-inspector h2 {
  font-family: var(--brand-font-display);
  font-weight: 600;
  font-size: 1.25rem;
  margin-block: 0;
}
body[data-site="cad"] .cad-frame {
  border: 1px solid var(--brand-border);
  background: var(--brand-paper);
  padding: 0.75rem;
}
body[data-site="cad"] #cad {
  width: 100%;
  max-width: 100%;
  height: clamp(280px, 55vh, 600px);
}
body[data-site="cad"] #cad canvas {
  display: block;
  max-width: 100%;
}
body[data-site="cad"] .cad-stage-note {
  font-size: 0.8125rem;
  color: var(--brand-muted);
  margin-block: 0;
  max-width: 60ch;
}

/* Inspector: live status, inspectable parse report, fixed facts. */
body[data-site="cad"] .cad-inspector {
  min-width: 0;
  padding: 1rem;
  background: var(--brand-background);
  font-size: 0.90625rem;
}
body[data-site="cad"] .cad-facts { margin-block: 0; }
body[data-site="cad"] .cad-facts dt {
  font-family: var(--brand-font-mono);
  font-size: 0.65625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand-muted);
  margin-block-start: 0.6rem;
}
body[data-site="cad"] .cad-facts dt:first-child { margin-block-start: 0; }
body[data-site="cad"] .cad-facts dd { margin-block: 0.15rem 0; }

body[data-site="cad"] #cad-status {
  margin-block: 0;
  font-weight: 500;
}
body[data-site="cad"] #cad-status[data-state="idle"] { color: var(--brand-muted); }
body[data-site="cad"] #cad-status[data-state="stale"] { color: var(--brand-ink); font-weight: 600; }
body[data-site="cad"] #cad-status[data-state="working"] { color: var(--brand-graphite); }
body[data-site="cad"] #cad-status[data-state="success"] { color: var(--brand-ink); }
body[data-site="cad"] #cad-status[data-state="error"] { color: var(--brand-accent); font-weight: 600; }

body[data-site="cad"] #cad-info {
  font-family: var(--brand-font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--brand-paper);
  border: 1px solid var(--brand-border);
  padding: 0.5rem;
  margin-block: 0;
  max-height: 14rem;
  overflow: auto;
}
body[data-site="cad"] #cad-info:empty { display: none; }

body[data-site="cad"] .cad-inspector details {
  border-block-start: 1px solid var(--brand-border);
  padding-block: 0.5rem;
  margin-block-start: 0.75rem;
}
body[data-site="cad"] .cad-inspector summary {
  cursor: pointer;
  font-weight: 600;
}
body[data-site="cad"] .cad-inspector details p {
  font-size: 0.84375rem;
  color: var(--brand-muted);
  margin-block: 0.5rem 0;
}
body[data-site="cad"] .cad-inspect-link {
  font-size: 0.8125rem;
  color: var(--brand-muted);
  margin-block: 0.75rem 0;
}

/* --- documentation sections ------------------------------------------------ */

body[data-site="cad"] .cad-doc {
  margin-block-start: 2.5rem;
  max-width: 46rem;
}
body[data-site="cad"] .cad-doc ul,
body[data-site="cad"] .cad-doc ol { padding-inline-start: 1.25rem; }
body[data-site="cad"] .cad-doc li { margin-block-end: 0.4rem; }

body[data-site="cad"] .cad-steps {
  list-style: none;
  padding-inline-start: 0;
  counter-reset: cadstep;
  margin-block: 0;
}
body[data-site="cad"] .cad-steps li {
  counter-increment: cadstep;
  position: relative;
  padding-inline-start: 2.4rem;
  margin-block-end: 0.9rem;
}
body[data-site="cad"] .cad-steps li::before {
  content: counter(cadstep, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.1rem;
  font-family: var(--brand-font-mono);
  font-size: 0.75rem;
  color: var(--brand-accent);
  border: 1px solid var(--brand-border);
  padding: 0.05rem 0.3rem;
}

body[data-site="cad"] .cad-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
body[data-site="cad"] .cad-duo h3 {
  border-block-start: 2px solid var(--brand-graphite);
  padding-block-start: 0.5rem;
}
body[data-site="cad"] .cad-duo ul {
  padding-inline-start: 1.1rem;
  margin-block: 0;
}
body[data-site="cad"] .cad-yes li::marker { content: "✓ "; color: var(--brand-graphite); }
body[data-site="cad"] .cad-no li::marker { content: "✗ "; color: var(--brand-accent); }

/* --- guides hub ------------------------------------------------------------ */

body[data-site="cad"] .cad-guides { max-width: 46rem; }
body[data-site="cad"] .cad-guide-card {
  background: var(--brand-paper);
  border: 1px solid var(--brand-border);
  padding: 1rem 1.25rem;
  margin-block: 0 1rem;
}
body[data-site="cad"] .cad-guide-card h3 {
  font-size: 1.1875rem;
  margin-block: 0 0.4rem;
}
body[data-site="cad"] .cad-guide-card p:last-child { margin-block-end: 0; }
body[data-site="cad"] .cad-guide-meta {
  font-family: var(--brand-font-mono);
  font-size: 0.75rem;
  color: var(--brand-muted);
  margin-block: 0.5rem 0;
}
body[data-site="cad"] .cad-guides-note {
  font-size: 0.90625rem;
  color: var(--brand-muted);
}

/* --- small screens: stage above inspector, ≥16px gutters ------------------- */

@media (max-width: 760px) {
  body[data-site="cad"] .cad-panel { grid-template-columns: 1fr; }
  body[data-site="cad"] .cad-stage {
    border-inline-end: 0;
    border-block-end: 1px solid var(--brand-border);
    padding: 1rem; /* 16px minimum gutter on every side */
  }
  body[data-site="cad"] .cad-inspector { padding: 1rem; }
  body[data-site="cad"] .cad-toolbar { padding: 0.625rem 1rem; }
  body[data-site="cad"] #cad-file { flex: 1 1 100%; }
  body[data-site="cad"] .cad-toolbar button { flex: 1 1 auto; }
  body[data-site="cad"] .cad-duo { grid-template-columns: 1fr; }
}