/* ==========================================================================
   CoSAI Wizards — shared design tokens, resets, accessibility + print
   Licensed under the Apache License, Version 2.0.
   Palette: neutral CoSAI navy / blue / muted slate. System fonts only.
   ========================================================================== */

:root {
  /* Brand */
  --cosai-navy:        #0f1f3d;
  --cosai-navy-light:  #1a2d52;
  --cosai-navy-muted:  #1e2d4a;
  --cosai-blue:        #2d5be3;
  --cosai-blue-light:  #eef2fd;
  --cosai-blue-soft:   #dbe6fb;

  /* Neutrals */
  --slate-50:          #f8fafc;
  --slate-100:         #f1f5f9;
  --slate-200:         #e2e8f0;
  --slate-300:         #cbd5e1;
  --slate-400:         #94a3b8;
  --slate-500:         #64748b;
  --slate-600:         #475569;
  --slate-700:         #334155;
  --slate-800:         #1e293b;
  --slate-900:         #0f172a;

  /* Status (≥ 4.5:1 contrast on white for text use) */
  --status-good:       #15803d;
  --status-good-bg:    #f0fdf4;
  --status-good-br:    #86efac;
  --status-warn:       #a16207;
  --status-warn-bg:    #fffbeb;
  --status-warn-br:    #fcd34d;
  --status-bad:        #b91c1c;
  --status-bad-bg:     #fef2f2;
  --status-bad-br:     #fca5a5;
  --status-na:         #64748b;
  --status-na-bg:      #f1f5f9;
  --status-na-br:      #cbd5e1;

  /* Layer accents — kept subdued for print / accessibility */
  /* Layer accents: AA-compliant on white (ratio >= 4.5:1 for body text). */
  --l1: #15803d; --l1-bg: #f0fdf4; --l1-border: #bbf7d0; --l1-text: #14532d;
  --l2: #1d4ed8; --l2-bg: #eff6ff; --l2-border: #bfdbfe; --l2-text: #1e3a8a;
  --l3: #c2410c; --l3-bg: #fff7ed; --l3-border: #fed7aa; --l3-text: #7c2d12;
  --l4: #6d28d9; --l4-bg: #faf5ff; --l4-border: #e9d5ff; --l4-text: #4c1d95;
  --l5: #0e7490; --l5-bg: #ecfeff; --l5-border: #a5f3fc; --l5-text: #164e63;

  /* Layout */
  --radius-sm:   4px;
  --radius:      8px;
  --radius-lg:   12px;
  --shadow:      0 1px 3px rgba(15, 31, 61, 0.08), 0 1px 2px rgba(15, 31, 61, 0.06);
  --shadow-md:   0 4px 6px rgba(15, 31, 61, 0.07), 0 2px 4px rgba(15, 31, 61, 0.06);

  /* Focus ring — WCAG 2.2 non-text contrast compliant on white and navy */
  --focus-ring:  0 0 0 3px rgba(45, 91, 227, 0.45);

  /* Typography — system stack only, no external fonts */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
               Arial, 'Noto Sans', system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Mono', 'Roboto Mono', 'Menlo',
               'Consolas', monospace;
}

/* Resets ------------------------------------------------------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--slate-50);
  color: var(--slate-800);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: var(--cosai-blue); }
a:hover { text-decoration: underline; }

/* Skip link -------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--cosai-navy);
  color: #fff;
  padding: 8px 12px;
  border-radius: var(--radius);
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}
.skip-link:focus {
  top: 8px;
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Focus -------------------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--cosai-blue);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
  border-radius: 3px;
}

/* Buttons ----------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--cosai-blue);
  color: #fff;
  border: 1px solid var(--cosai-blue);
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: #1d4ed8; border-color: #1d4ed8; }
.btn--ghost {
  background: #fff;
  color: var(--cosai-blue);
  border-color: var(--slate-300);
}
.btn--ghost:hover { background: var(--cosai-blue-light); border-color: var(--cosai-blue); }
.btn--dark {
  background: var(--cosai-navy);
  color: #fff;
  border-color: var(--cosai-navy);
}
.btn--dark:hover { background: var(--cosai-navy-light); border-color: var(--cosai-navy-light); }

/* Shared persistence bar (Export / Import JSON / Reset) ------------------- */

.state-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  background: var(--slate-100);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  margin: 12px 0 18px;
  font-size: 0.82rem;
  color: var(--slate-600);
}
.state-bar__label {
  font-weight: 600;
  color: var(--slate-700);
  margin-right: auto;
}
.state-bar .btn {
  padding: 6px 12px;
  font-size: 0.8rem;
}
.state-bar input[type="file"] {
  display: none;
}

/* Utility ----------------------------------------------------------------- */

.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;
}

/* Reduced motion --------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print ------------------------------------------------------------------- */

@media print {
  :root { --shadow: none; --shadow-md: none; }
  body {
    background: #fff;
    color: #000;
  }
  .no-print,
  .state-bar,
  .skip-link,
  .pdf-btn,
  .complete-btn,
  .ans-btn:not(.sel-yes):not(.sel-partial):not(.sel-no):not(.sel-na),
  .btn-opt:not(.sel),
  .btn,
  footer .btn {
    display: none !important;
  }
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.78em;
    color: #555;
  }
  .phase-card,
  .layer-row,
  .scenario-card,
  section,
  .results-grid {
    break-inside: avoid;
    page-break-inside: avoid;
  }
  h1, h2, h3 { break-after: avoid; page-break-after: avoid; }
  .print-break,
  .phase-card + .phase-card,
  .results-section,
  .gaps-section {
    break-before: page;
    page-break-before: always;
  }
  .phase-body { display: block !important; }
  .layer-body { display: block !important; }
}

/* High-contrast fallback ------------------------------------------------- */

@media (prefers-contrast: more) {
  :root {
    --slate-200: #9aa5b1;
    --slate-300: #64748b;
  }
  .btn--ghost { border-color: var(--cosai-navy); color: var(--cosai-navy); }
}