/* ════════════════════════════════════════════════════════════
   CURRICULUM ATLAS — shared tokens + primitives
   Dark default; opt-in light via [data-theme="light"]
   ════════════════════════════════════════════════════════════ */

/* All atlas tokens are scoped under .atlas-page so they cannot leak into
   the rest of the site (which has its own --font-display, --bg-* etc). */
.atlas-page {
  /* Type */
  --font-display: 'IBM Plex Sans', system-ui, sans-serif;
  --font-body:    'Source Sans 3', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Dark (default) — STUDIO palette, WCAG AA tuned */
  --bg-page:      #012E40;
  --bg-canvas:    #011F2C;
  --bg-surface:   #034959;
  --bg-input:     #02384D;
  --border-subtle: #0A5068;
  --border-strong: #145973;

  --text-strong:  #EDF0F2;
  --text-body:    #C5D1D8;
  --text-muted:   #8AA3AE;
  --text-faint:   #5C7884;

  /* Accents */
  --accent-primary: #F2DD72;
  --accent-info:    #5BBCD6;
  --accent-success: #7CD9A0;
  --accent-warn:    #F2A572;
  --accent-error:   #E85B5B;
  --accent-context: #B0A0E8;

  /* Cohort pattern channel — color + shape encoding for a11y */
  --pat-spatial:  #5BBCD6;
  --pat-concept:  #B0A0E8;
  --pat-balance:  #7CD9A0;
  --pat-late:     #F2DD72;

  --focus-ring: 0 0 0 2px var(--bg-page), 0 0 0 4px var(--accent-info);

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-1: 0 1px 2px rgba(0,0,0,0.25);
  --shadow-2: 0 4px 14px rgba(0,0,0,0.35);
}

.atlas-page[data-theme="light"] {
  --bg-page:      #F5F2EA;
  --bg-canvas:    #EDE8DC;
  --bg-surface:   #FFFFFF;
  --bg-input:     #FAF7EF;
  --border-subtle: #D9CFB8;
  --border-strong: #B6A988;

  --text-strong:  #1A2429;
  --text-body:    #2E3D45;
  --text-muted:   #5C6E78;
  --text-faint:   #8395A0;

  --accent-primary: #B8932E;
  --accent-info:    #1F7A92;
  --accent-success: #2B8C5A;
  --accent-warn:    #B85A2A;
  --accent-error:   #B12E2E;
  --accent-context: #5F4DAA;

  --pat-spatial: #1F7A92;
  --pat-concept: #5F4DAA;
  --pat-balance: #2B8C5A;
  --pat-late:    #8B6914;

  --shadow-1: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-2: 0 4px 14px rgba(0,0,0,0.10);
}

/* Atlas-scoped resets — only apply on .atlas-page so app.css elsewhere stays intact */
.atlas-page * { margin: 0; padding: 0; box-sizing: border-box; }
.atlas-page {
  font-family: var(--font-body);
  background: var(--bg-page);
  color: var(--text-body);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .atlas-page *, .atlas-page *::before, .atlas-page *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}
.atlas-page[data-motion="reduced"] *,
.atlas-page[data-motion="reduced"] *::before,
.atlas-page[data-motion="reduced"] *::after {
  animation-duration: 0.001ms !important;
  transition-duration: 0.001ms !important;
}

/* ── Focus ── */
.atlas-page :focus { outline: none; }
.atlas-page :focus-visible {
  outline: 2px solid var(--accent-info);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ── Skip link ── */
.atlas-page .skip-link {
  position: absolute;
  left: -10000px;
  top: 0;
  background: var(--accent-info);
  color: var(--bg-page);
  padding: 0.6rem 1rem;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--radius) 0;
}
.atlas-page .skip-link:focus { left: 0; }

/* ── Headings ── */
.atlas-page h1,
.atlas-page h2,
.atlas-page h3,
.atlas-page h4 {
  font-family: var(--font-display);
  color: var(--text-strong);
  font-weight: 600;
  line-height: 1.25;
}

/* ── Mono accents ── */
.atlas-page .mono { font-family: var(--font-mono); }
.atlas-page .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

/* ── Atlas-style coordinate label ── */
.atlas-page .coord {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  text-transform: uppercase;
}

/* ── Buttons ── */
.atlas-page .btn {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-body);
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background 0.18s;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.atlas-page .btn:hover { border-color: var(--accent-info); color: var(--text-strong); }
.atlas-page .btn[aria-pressed="true"] {
  border-color: var(--accent-info);
  color: var(--accent-info);
  background: rgba(91,188,214,0.08);
}

/* ── Surface card ── */
.atlas-page .surface {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

/* ── Theme/motion toggle row ── */
.atlas-page .toolbar {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem;
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
}
.atlas-page .toolbar button {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 999px;
  min-height: 36px;
  transition: background 0.15s, color 0.15s;
}
.atlas-page .toolbar button:hover { color: var(--text-strong); }
.atlas-page .toolbar button[aria-pressed="true"] {
  background: var(--bg-surface);
  color: var(--accent-info);
}

/* ── Visually hidden ── */
.atlas-page .sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Tag/chip ── */
.atlas-page .tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.18rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  background: var(--bg-canvas);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}
.atlas-page .tag.spatial { color: var(--pat-spatial); border-color: var(--pat-spatial); }
.atlas-page .tag.concept { color: var(--pat-concept); border-color: var(--pat-concept); }
.atlas-page .tag.balance { color: var(--pat-balance); border-color: var(--pat-balance); }
.atlas-page .tag.late    { color: var(--pat-late);    border-color: var(--pat-late);    }

/* Glyph alongside tag for color-independent encoding */
.atlas-page .tag .glyph { width: 8px; height: 8px; flex-shrink: 0; }
.atlas-page .glyph.circle   { border-radius: 50%; background: currentColor; }
.atlas-page .glyph.square   { background: currentColor; }
.atlas-page .glyph.triangle {
  width: 0 !important; height: 0 !important;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 9px solid currentColor;
  background: transparent;
}
.atlas-page .glyph.diamond  {
  background: currentColor;
  transform: rotate(45deg);
  width: 7px !important; height: 7px !important;
}

/* ── Sample data caveat ── */
.atlas-page .illustrative {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-warn);
  border: 1px dashed var(--accent-warn);
  background: color-mix(in oklab, var(--accent-warn) 8%, transparent);
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
}

/* ── Text styles for prose ── */
.atlas-page p { font-size: 1rem; }
.atlas-page p + p { margin-top: 0.85rem; }

/* Print */
@media print {
  .atlas-page { background: white; color: black; }
  .atlas-page .no-print { display: none !important; }
}