/* ══════════════════════════════════════════════════════════════
   theme-atlas.css — Annotated Specimen Atlas shell system
   Loads AFTER style.css, BEFORE nav.css and page CSS.
   Owns: atlas tokens, legacy-token remap, shell primitives,
   focus treatment, paper texture, specimen card geometry.
   ══════════════════════════════════════════════════════════════ */

:root {
  /* atlas tokens */
  --atlas-paper: #F1F1EB;
  --atlas-surface: #FAFAF6;
  --atlas-ink: #11120F;
  --atlas-muted: #62645D;
  --atlas-rule: #B8B9B0;
  --atlas-signal: #FF4D1F;
  --atlas-signal-soft: #FFE9E1;
  --atlas-cobalt: #2B50E8;
  --atlas-focus: #005FCC;
  --atlas-radius-xs: 2px;
  --atlas-radius-sm: 4px;
  --atlas-grid-max: 1440px;

  /* legacy token remap — style.css consumers inherit the atlas palette */
  --bg: var(--atlas-paper);
  --bg-warm: #E9E9E1;
  --ink: var(--atlas-ink);
  --ink-light: var(--atlas-muted);
  --ink-muted: #8A8C83;
  --accent: var(--atlas-signal);
  --accent-soft: var(--atlas-signal-soft);
  --border: var(--atlas-rule);
  --card-bg: var(--atlas-surface);
  --card-shadow: none;
  --radius: var(--atlas-radius-sm);
}

/* ── Paper grid texture (CSS gradients only, sub-0.035 opacity) ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(17, 18, 15, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(17, 18, 15, 0.5) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.03;
}

/* ── Links & data marks ── */
a { color: inherit; }
.modal-scroll a,
.faq-answer a,
.example-link { color: var(--atlas-cobalt); }

/* ── Focus treatment (never suppressed) ── */
:focus-visible {
  outline: 2px solid var(--atlas-focus);
  outline-offset: 2px;
}
.skip-link {
  position: absolute;
  left: 8px;
  top: -48px;
  z-index: 200;
  padding: 8px 14px;
  background: var(--atlas-ink);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  border-radius: var(--atlas-radius-sm);
  transition: top 0.15s ease;
}
.skip-link:focus-visible { top: 8px; }

/* ── Header shell: wrap-friendly, no fixed height ── */
.site-header {
  background: rgba(241, 241, 235, 0.92);
  border-bottom: 1px solid var(--atlas-rule);
}
.header-inner {
  max-width: var(--atlas-grid-max);
  min-height: 64px;
  height: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding-block: 8px;
}
.logo-sketch {
  border-radius: var(--atlas-radius-xs);
  color: var(--atlas-signal);
}

/* ── Nav links: text + rule, not pills ── */
.nav-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--atlas-ink);
  background: none;
  border: 1px solid transparent;
  border-bottom: 1px solid transparent;
  border-radius: var(--atlas-radius-xs);
  padding: 5px 10px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}
.nav-link:hover {
  border-bottom-color: var(--atlas-ink);
}
.nav-link[aria-current="page"] {
  color: var(--atlas-signal);
  border-bottom-color: var(--atlas-signal);
}
.nav-link--external { color: var(--atlas-muted); }
.nav-link--external:hover { color: var(--atlas-ink); }

.header-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--atlas-muted);
  background: none;
  border: 1px solid var(--atlas-rule);
  border-radius: var(--atlas-radius-xs);
  padding: 4px 10px;
  white-space: nowrap;
}
.lang-toggle {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--atlas-surface);
  border: 1px solid var(--atlas-rule);
  border-radius: var(--atlas-radius-xs);
  padding: 4px 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  transition: border-color 0.15s;
}
.lang-toggle:hover { border-color: var(--atlas-ink); }
.lang-option.active { color: var(--atlas-signal); font-weight: 700; }

/* ── Controls: square-ish, ink-rule interaction ── */
.filter-btn,
.search-input {
  border-radius: var(--atlas-radius-sm);
}
.filter-btn:hover {
  border-color: var(--atlas-ink);
  color: var(--atlas-ink);
}
.filter-btn.active {
  background: var(--atlas-ink);
  border-color: var(--atlas-ink);
}
.search-input:focus { border-color: var(--atlas-ink); }

/* ── Specimen cards: rule + ink, no lift/shadow ── */
.ism-card {
  border: 1px solid var(--atlas-rule);
  border-radius: var(--atlas-radius-sm);
  box-shadow: none;
}
.ism-card:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--atlas-ink);
}

/* card title is a real button (keyboard-activatable, no nested-widget card) */
.ism-name-btn {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}
.ism-name-btn:hover { color: var(--atlas-signal); }

/* anti-pattern semantics (ai-slop) */
.ism-kind-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--atlas-signal);
  border: 1px solid var(--atlas-signal);
  border-radius: var(--atlas-radius-xs);
  display: inline-block;
  padding: 2px 6px;
  margin-bottom: 6px;
}
.ism-card[data-kind="anti-pattern"] { border-style: dashed; }
.modal-antipattern-warning {
  border: 1px solid var(--atlas-signal);
  border-left-width: 4px;
  border-radius: var(--atlas-radius-sm);
  background: var(--atlas-signal-soft);
  color: var(--atlas-ink);
  font-size: 13px;
  line-height: 1.6;
  padding: 12px 14px;
  margin: 12px 0;
}
.modal-sources {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
}
.modal-sources a { color: var(--atlas-cobalt); }
.modal-reviewed {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--atlas-muted);
  margin-top: 6px;
}

/* ── Equal 3-column specimen catalog ── */
@media (min-width: 1025px) {
  .masonry {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* keywords read as annotation text, not decorative pills */
.ism-kw {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
  color: var(--atlas-muted);
}
.ism-kw::before {
  content: '· ';
  color: var(--atlas-rule);
}
.ism-keywords { gap: 2px 8px; }

.scroll-top {
  border-radius: var(--atlas-radius-sm);
}

/* ── Modal elevation: the one restrained shadow ── */
.modal-container {
  border: 1px solid var(--atlas-ink);
  border-radius: var(--atlas-radius-sm);
  box-shadow: 0 24px 64px rgba(17, 18, 15, 0.22);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--atlas-rule);
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .ism-card { animation: none; }
  .loading-logo { animation: none; }
  html { scroll-behavior: auto; }
  .skip-link { transition: none; }
}