/* GeoStru NX — Design System page chrome */

.ds-page {
  min-height: 100vh;
  background: var(--gs-bg);
  color: var(--gs-text);
  display: flex;
  flex-direction: column;
}

/* Hero */
.ds-hero {
  padding: 56px 56px 40px;
  border-bottom: 1px solid var(--gs-border);
  background: var(--gs-bg-elev);
  position: relative;
  overflow: hidden;
}
.ds-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--gs-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--gs-border-subtle) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -1px -1px;
  opacity: 0.6;
  mask-image: radial-gradient(ellipse at top right, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at top right, black 0%, transparent 70%);
  pointer-events: none;
}
.ds-hero__inner { position: relative; max-width: 1280px; }
.ds-hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--gs-fs-xs);
  color: var(--gs-text-secondary);
  font-family: var(--gs-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-pill);
  background: var(--gs-bg-sunken);
}
.ds-hero__title {
  font-size: var(--gs-fs-4xl);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 18px 0 10px;
  line-height: 1.1;
  text-wrap: balance;
}
.ds-hero__title em { font-style: normal; color: var(--gs-accent-text); }
.ds-hero__lede {
  font-size: 16px;
  color: var(--gs-text-secondary);
  max-width: 720px;
  line-height: 1.55;
  text-wrap: pretty;
}
.ds-hero__meta {
  display: flex; gap: 28px; flex-wrap: wrap;
  margin-top: 24px;
  font-size: var(--gs-fs-xs);
  color: var(--gs-text-tertiary);
  font-family: var(--gs-font-mono);
}
.ds-hero__meta b { color: var(--gs-text); font-weight: 500; margin-left: 6px; }

/* TOC sticky */
.ds-toc {
  position: sticky; top: 0;
  z-index: 50;
  background: var(--gs-bg-elev);
  border-bottom: 1px solid var(--gs-border);
  padding: 0 56px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  height: 44px;
  align-items: center;
  font-size: var(--gs-fs-sm);
}
.ds-toc a {
  padding: 6px 10px;
  color: var(--gs-text-secondary);
  border-radius: var(--gs-r-sm);
  white-space: nowrap;
  font-weight: 500;
}
.ds-toc a:hover { background: var(--gs-bg-hover); color: var(--gs-text); text-decoration: none; }

/* Section */
.ds-section {
  padding: 56px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  border-bottom: 1px solid var(--gs-border-subtle);
}
.ds-section__head { margin-bottom: 32px; max-width: 720px; }
.ds-section__title {
  font-size: var(--gs-fs-3xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.ds-section__subtitle {
  color: var(--gs-text-secondary);
  font-size: 15px;
  margin: 0;
  line-height: 1.55;
  text-wrap: pretty;
}
.ds-section__body {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

/* Sub-block */
.ds-sub { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.ds-sub__title {
  font-size: var(--gs-fs-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gs-text-secondary);
  margin: 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gs-border);
}
.ds-sub__body { display: flex; flex-direction: column; gap: 14px; min-width: 0; }

/* Specimen wrapper */
.ds-specimen {
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  background: var(--gs-bg-elev);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.ds-specimen__stage {
  padding: 24px;
  background:
    linear-gradient(var(--gs-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--gs-border-subtle) 1px, transparent 1px),
    var(--gs-bg);
  background-size: 16px 16px;
  display: flex; flex-direction: column; gap: 16px;
  align-items: flex-start;
  min-height: 80px;
}
.ds-specimen__stage--center { align-items: center; justify-content: center; }
.ds-specimen__stage--plain { background: var(--gs-bg-elev); }
.ds-specimen__meta {
  border-top: 1px solid var(--gs-border);
  padding: 8px 12px;
  font-size: var(--gs-fs-2xs);
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--gs-bg-sunken);
}
.ds-specimen__label { color: var(--gs-text-secondary); font-weight: 500; }
.ds-specimen__code { font-family: var(--gs-font-mono); color: var(--gs-text-tertiary); font-size: 11px; }

/* Color swatch grid */
.ds-swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; }
.ds-swatch {
  display: flex; align-items: center; gap: 12px;
  padding: 10px;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  background: var(--gs-bg-elev);
  min-width: 0;
}
.ds-swatch__chip {
  width: 44px; height: 44px;
  border-radius: var(--gs-r-sm);
  border: 1px solid rgba(0,0,0,0.06);
  flex: none;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04);
}
.ds-swatch__meta { min-width: 0; flex: 1; }
.ds-swatch__name { font-weight: 500; font-size: var(--gs-fs-sm); margin-bottom: 2px; }
.ds-swatch__token { display: block; font-family: var(--gs-font-mono); font-size: 11px; color: var(--gs-text-tertiary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ds-swatch__value { display: block; font-family: var(--gs-font-mono); font-size: 10.5px; color: var(--gs-text-tertiary); margin-top: 2px; }

/* Type rows */
.ds-type-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--gs-border-subtle);
}
.ds-type-row:last-child { border-bottom: 0; }
.ds-type-row__meta { font-size: var(--gs-fs-xs); color: var(--gs-text-tertiary); }
.ds-type-row__label { color: var(--gs-text); font-weight: 500; margin-bottom: 2px; }
.ds-type-row__meta code { font-family: var(--gs-font-mono); font-size: 11px; }
.ds-type-row__sample { color: var(--gs-text); letter-spacing: -0.01em; }

/* Symbol grid */
.ds-symbol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  overflow: hidden;
  background: var(--gs-bg-elev);
}
.ds-symbol {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-right: 1px solid var(--gs-border-subtle);
  border-bottom: 1px solid var(--gs-border-subtle);
}
.ds-symbol__glyph {
  font-family: var(--gs-font-sans);
  font-size: 22px;
  font-style: italic;
  color: var(--gs-text);
  width: 36px;
  display: inline-flex; align-items: baseline;
  flex: none;
}
.ds-symbol__meta { min-width: 0; }
.ds-symbol__name { font-size: var(--gs-fs-sm); }
.ds-symbol__unit { font-size: 11px; color: var(--gs-text-tertiary); margin-top: 1px; }

/* App shell preview */
.ds-shell {
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  overflow: hidden;
  background: var(--gs-bg);
  display: flex; flex-direction: column;
  height: 720px;
  box-shadow: var(--gs-shadow-md);
}
.ds-shell__body { flex: 1; display: flex; min-height: 0; }
.ds-canvas {
  flex: 1; min-width: 0;
  background: var(--gs-bg-canvas);
  overflow: auto;
  padding: 20px;
  position: relative;
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}
[data-gs-theme="dark"] .ds-canvas {
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
}
.ds-canvas__inner { display: flex; justify-content: center; }
.ds-paper {
  background: var(--gs-bg-elev);
  border: 1px solid var(--gs-border-strong);
  width: 720px;
  font-size: 13px;
  box-shadow: var(--gs-shadow-md);
}
.ds-paper__head {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
  border-bottom: 1px solid var(--gs-border-strong);
}
.ds-paper__head > div {
  padding: 8px 10px;
  border-right: 1px solid var(--gs-border);
}
.ds-paper__head > div:last-child { border-right: 0; }
.ds-paper__lbl { font-size: 10px; color: var(--gs-text-tertiary); text-transform: uppercase; letter-spacing: 0.05em; }
.ds-paper__val { font-weight: 600; margin-top: 2px; }
.ds-paper__cols {
  display: flex;
  background: var(--gs-bg-sunken);
  border-bottom: 1px solid var(--gs-border-strong);
  font-size: 11px;
  color: var(--gs-text-secondary);
  font-weight: 600;
}
.ds-paper__col {
  padding: 6px 10px;
  border-right: 1px solid var(--gs-border);
  text-align: center;
}
.ds-paper__col:last-child { border-right: 0; }
.ds-paper__row {
  display: flex;
  border-bottom: 1px solid var(--gs-border);
  align-items: stretch;
  min-height: 56px;
}
.ds-paper__row > div {
  padding: 8px 10px;
  border-right: 1px solid var(--gs-border);
  display: flex; align-items: center;
  font-size: 12px;
}
.ds-paper__row > div:last-child { border-right: 0; }

.ds-right { width: 320px; flex: none; display: flex; flex-direction: column; min-height: 0; border-left: 1px solid var(--gs-border); }

/* App headers grid */
.ds-app-headers {
  display: flex; flex-direction: column;
  gap: 12px;
}
.ds-app-header {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 12px;
  align-items: center;
}
.ds-app-header__tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: var(--gs-bg-sunken);
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  font-size: var(--gs-fs-xs);
  font-weight: 600;
  color: var(--gs-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  height: 36px;
  white-space: nowrap;
  font-family: var(--gs-font-mono);
}

/* Principles cards */
.ds-principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.ds-principle {
  padding: 18px 20px 20px;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  background: var(--gs-bg-elev);
  display: flex; flex-direction: column; gap: 6px;
}
.ds-principle__num {
  font-family: var(--gs-font-mono);
  font-size: 11px;
  color: var(--gs-text-tertiary);
  letter-spacing: 0.05em;
}
.ds-principle__title { font-size: var(--gs-fs-md); font-weight: 600; letter-spacing: -0.01em; }
.ds-principle__body { font-size: var(--gs-fs-sm); color: var(--gs-text-secondary); line-height: 1.5; }

/* Buttons / icon row */
.ds-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ds-row--col { flex-direction: column; align-items: stretch; }

/* Icon grid */
.ds-icons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-r-md);
  overflow: hidden;
  background: var(--gs-bg-elev);
}
.ds-icons__cell {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px;
  padding: 14px 8px;
  border-right: 1px solid var(--gs-border-subtle);
  border-bottom: 1px solid var(--gs-border-subtle);
  font-size: 11px;
  font-family: var(--gs-font-mono);
  color: var(--gs-text-tertiary);
}
.ds-icons__cell:hover { background: var(--gs-bg-hover); color: var(--gs-text); }
.ds-icons__cell svg { color: var(--gs-text); }

/* Spacing scale */
.ds-spacing { display: flex; flex-direction: column; gap: 6px; }
.ds-spacing__row {
  display: grid; grid-template-columns: 80px 80px 1fr; align-items: center; gap: 12px;
  font-family: var(--gs-font-mono); font-size: 11px; color: var(--gs-text-tertiary);
}
.ds-spacing__bar { height: 14px; background: var(--gs-accent); border-radius: 2px; }

/* Footer */
.ds-footer {
  padding: 32px 56px;
  border-top: 1px solid var(--gs-border);
  font-size: var(--gs-fs-xs);
  color: var(--gs-text-tertiary);
  display: flex; justify-content: space-between; gap: 16px;
  font-family: var(--gs-font-mono);
}

/* Spans */
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }
@media (max-width: 1100px) {
  .span-3, .span-4 { grid-column: span 6; }
  .span-6, .span-8 { grid-column: span 12; }
  .ds-principles { grid-template-columns: repeat(2, 1fr); }
}