/* ==========================================================================
   Design system page only. Built from the same tokens as the game;
   no new colors are introduced here.
   ========================================================================== */

/* The game locks the viewport; this page scrolls. */
html, body { height: auto; overflow: auto; }
body.ds {
  min-height: 100vh;
  background: radial-gradient(ellipse at 70% 0%, var(--c-mars-sky-glow) 0%, var(--bg) 60%) fixed;
  line-height: 1.5;
}

code {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95em;
}

a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.ds-skip {
  position: absolute;
  left: var(--space-2);
  top: -40px;
  z-index: var(--z-modal);
  padding: var(--space-2);
  background: var(--panel-bg);
}
.ds-skip:focus { top: var(--space-2); }

/* ---- Nav: the game's sidebar, repurposed */
.ds-nav {
  position: fixed;
  top: var(--sidebar-margin);
  bottom: var(--sidebar-margin);
  left: var(--sidebar-margin);
  width: 260px;
  z-index: var(--z-panel);
  display: flex;
  flex-direction: column;
  gap: var(--sidebar-gap);
  overflow-y: auto;
}
.ds-brand {
  margin: 0;
  font-size: var(--fs-h1);
  letter-spacing: var(--ls-heading);
  color: var(--accent);
  text-shadow: var(--glow-accent);
}
.ds-brand-sub {
  margin: 6px 0 0;
  font-size: var(--fs-small);
  color: var(--text-dim);
}
.ds-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.ds-nav-list a {
  display: block;
  padding: 5px 8px;
  font-size: var(--fs-small);
  color: var(--text);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
}
.ds-nav-list a:hover {
  background: var(--surface-tint);
  border-color: var(--border-neutral);
  color: var(--accent);
}
.ds-nav-actions { display: flex; flex-direction: column; gap: var(--space-2); }
.ds-link-btn { display: block; text-align: center; text-decoration: none; }

/* ---- Main column */
.ds-main {
  margin-left: calc(260px + var(--sidebar-margin) * 2);
  padding: 48px 40px 80px 0;
  max-width: 1100px;
}

.ds-intro { max-width: 68ch; margin-bottom: 40px; }
.ds-display {
  margin: 0 0 var(--space-5);
  font-size: var(--fs-display);
  line-height: 1.15;
  letter-spacing: var(--ls-heading);
  color: var(--accent);
  text-shadow: var(--glow-accent);
}
.ds-intro p { margin: 0; font-size: var(--fs-body); color: var(--text-dim); line-height: 1.7; }

.ds-status { font-size: var(--fs-small); color: var(--text-dim); }
.ds-status.is-error {
  padding: var(--space-3) var(--space-4);
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--text);
}
.ds-status:empty { display: none; }

.ds-section {
  padding-top: 32px;
  margin-top: 32px;
  border-top: 1px solid var(--border-neutral);
  scroll-margin-top: 16px;
}
.ds-section-title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-h2);
  color: var(--accent);
}
.ds-lede {
  margin: 0 0 var(--space-6);
  max-width: 68ch;
  font-size: var(--fs-body);
  color: var(--text-dim);
}
.ds-sub {
  margin: 28px 0 var(--space-3);
  font-size: var(--fs-h3);
  letter-spacing: var(--ls-label);
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ---- Token tables */
.ds-token-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
}
.ds-token-table-wrap { overflow-x: auto; }
.ds-token-table th {
  text-align: left;
  font-weight: normal;
  font-size: var(--fs-tiny);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0 var(--space-3) var(--space-2) 0;
  border-bottom: 1px solid var(--border-neutral);
}
.ds-token-table td {
  padding: var(--space-3) var(--space-3) var(--space-3) 0;
  border-bottom: 1px solid var(--surface-tint);
  vertical-align: middle;
}
.ds-token-table td:first-child { width: 120px; }
.ds-token-name { color: var(--accent); white-space: nowrap; }
.ds-token-value { color: var(--text); word-break: break-word; }
.ds-token-resolved { display: block; color: var(--text-dim); font-size: var(--fs-tiny); }
.ds-token-desc { color: var(--text-dim); }

/* Previews */
.ds-swatch {
  width: 96px;
  height: 40px;
  border: 1px solid var(--border-neutral);
  /* checkerboard so translucent colors read as translucent */
  background-image:
    linear-gradient(45deg, rgba(var(--c-white-rgb), 0.08) 25%, transparent 25%, transparent 75%, rgba(var(--c-white-rgb), 0.08) 75%),
    linear-gradient(45deg, rgba(var(--c-white-rgb), 0.08) 25%, transparent 25%, transparent 75%, rgba(var(--c-white-rgb), 0.08) 75%);
  background-size: 12px 12px;
  background-position: 0 0, 6px 6px;
  position: relative;
}
.ds-swatch > span { position: absolute; inset: 0; }
.ds-bar { height: 10px; background: var(--accent); min-width: 1px; max-width: 110px; }
.ds-radius-box {
  width: 56px;
  height: 36px;
  border: 1px solid var(--accent);
  background: var(--surface-tint);
}
.ds-shadow-box {
  width: 96px;
  height: 40px;
  background: var(--panel-bg);
  border: 1px solid var(--border-neutral);
}
.ds-image-box {
  width: 96px;
  height: 48px;
  background-color: var(--panel-bg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  border: 1px solid var(--border-neutral);
}
/* Image tokens are applied from this stylesheet (not inline styles) so the
   relative url() in tokens.css resolves from assets/css/ — see README. */
.ds-image--btn-corner-image { background-image: var(--btn-corner-image); }
.ds-image--panel-corner-image { background-image: var(--panel-corner-image); }
.ds-type-sample { color: var(--text); white-space: nowrap; }
.ds-glow-sample { color: var(--accent); font-weight: bold; }
.ds-muted { color: var(--text-dim); font-size: var(--fs-tiny); }

/* ---- Component demos */
.ds-demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}
.ds-demo { margin: 0; }
.ds-demo figcaption {
  margin-top: var(--space-2);
  font-size: var(--fs-tiny);
  color: var(--text-dim);
}
.ds-demo figcaption code { margin-right: 6px; }
.ds-demo-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: 120px;
  padding: var(--space-6);
  background: rgba(var(--c-night-rgb), 0.5);
  border: 1px dashed var(--border-neutral);
}
.ds-demo-tall { min-height: 220px; }
.ds-demo-wide { justify-content: flex-start; }
.ds-demo-stack { flex-direction: column; }
.ds-fixed-width { width: 280px; max-width: 100%; }
.ds-panel-copy { margin: 0; font-size: var(--fs-body); color: var(--text-dim); }

.ds-queue {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

/* Freeze components that are animated / fixed in the game */
.panel-modal.ds-modal-static { transform: none; width: 100%; }
.toast.ds-toast-static {
  position: static;
  transform: none;
  max-width: 100%;
  white-space: normal;
  text-align: center;
}

.ds-footer {
  margin-top: 56px;
  font-size: var(--fs-tiny);
  color: var(--text-dim);
}

/* ---- Small screens: nav becomes a top panel */
@media (max-width: 860px) {
  .ds-nav {
    position: relative;
    inset: auto;
    width: auto;
    margin: var(--sidebar-margin);
  }
  .ds-nav-list { flex-direction: row; flex-wrap: wrap; }
  .ds-main { margin-left: 0; padding: 24px var(--sidebar-margin) 64px; }
  .ds-display { font-size: 1.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  html { scroll-behavior: auto; }
}