/* =============================================================
   Saaha Design System — Colors & Type
   Dual-theme tokens: "Warp & Weft" (light) + "Sidebar Rail" (dark)
   ============================================================= */

/* ---------- Font: Inter ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* ---------- Brand palette (raw) ---------- */
  --saaha-teal-900: #062E2F;
  --saaha-teal-800: #0A5C5F;
  --saaha-teal-700: #0D7377;  /* primary teal */
  --saaha-teal-600: #1A8A8E;
  --saaha-teal-500: #3AA7AA;
  --saaha-teal-300: #9CD1D3;
  --saaha-teal-100: #E0F0F1;

  --saaha-sand-800: #7A6430;
  --saaha-sand-600: #A88A45;
  --saaha-sand-500: #C4A35A;  /* sand accent */
  --saaha-sand-300: #E2CE97;
  --saaha-sand-100: #F5EDD7;

  --saaha-coral-700: #B8532E;
  --saaha-coral-600: #D16238;
  --saaha-coral-500: #E8734A;  /* coral accent */
  --saaha-coral-300: #F4A98B;
  --saaha-coral-100: #FBE5D9;

  --saaha-navy-900: #0F1620;
  --saaha-navy-800: #1A2332;  /* dark bg */
  --saaha-navy-700: #25304A;
  --saaha-navy-600: #3A4762;

  --saaha-parchment: #F7F5F0; /* warm off-white */
  --saaha-parchment-2: #EFECE3;
  --saaha-ink: #2D3748;       /* body text */
  --saaha-ink-mute: #4A5568;
  --saaha-gray-500: #718096;  /* secondary */
  --saaha-gray-300: #CBD5E0;
  --saaha-gray-200: #E2E8F0;  /* border */
  --saaha-gray-100: #EDF2F7;

  /* ---------- Gradient (logo signature) ---------- */
  --saaha-gradient: linear-gradient(95deg, #1A8A8E 0%, #3AA7AA 22%, #C4A35A 60%, #E8734A 100%);
  --saaha-gradient-soft: linear-gradient(95deg, #0D7377 0%, #A88A45 55%, #D16238 100%);

  /* ---------- Semantic (shared) ---------- */
  --color-brand: var(--saaha-teal-700);
  --color-brand-hover: var(--saaha-teal-800);
  --color-brand-active: var(--saaha-teal-900);
  --color-accent-sand: var(--saaha-sand-500);
  --color-accent-coral: var(--saaha-coral-500);

  --color-success: #2F855A;
  --color-warning: #B7791F;
  --color-danger:  #C53030;
  --color-info:    var(--saaha-teal-700);

  /* Governance state colors */
  --color-state-allowed: #2F855A;
  --color-state-denied:  #C53030;
  --color-state-pending: #B7791F;
  --color-state-review:  var(--saaha-teal-700);

  /* ---------- Type scale ---------- */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --text-display: 56px;
  --text-h1: 40px;
  --text-h2: 30px;
  --text-h3: 22px;
  --text-h4: 18px;
  --text-body: 15px;
  --text-small: 13px;
  --text-micro: 11px;

  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-normal: 1.5;
  --lh-relaxed: 1.65;

  --ls-tight: -0.02em;
  --ls-snug: -0.01em;
  --ls-normal: 0;
  --ls-wide: 0.04em;
  --ls-caps: 0.09em;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-black: 800;

  /* ---------- Spacing (4pt) ---------- */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* ---------- Radii ---------- */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 14px;
  --radius-pill: 999px;

  /* ---------- Shadows (institutional, restrained) ---------- */
  --shadow-xs: 0 1px 2px rgba(15, 22, 32, 0.06);
  --shadow-sm: 0 2px 4px rgba(15, 22, 32, 0.06), 0 1px 2px rgba(15, 22, 32, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 22, 32, 0.08), 0 2px 4px rgba(15, 22, 32, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 22, 32, 0.12), 0 4px 8px rgba(15, 22, 32, 0.06);
  --shadow-focus: 0 0 0 3px rgba(13, 115, 119, 0.28);

  /* ---------- Motion ---------- */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-emphasized: cubic-bezier(0.3, 0, 0, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --dur-fast: 120ms;
  --dur-med: 200ms;
  --dur-slow: 320ms;

  /* ---------- Border widths ---------- */
  --border-thin: 1px;
  --border-med: 1.5px;
  --border-thick: 2px;
}

/* ============================================================
   THEME: Warp & Weft (light) — default
   ============================================================ */
:root, [data-theme="warp-weft"] {
  --bg-canvas:     #F7F5F0;     /* warm off-white */
  --bg-surface:    #FFFFFF;
  --bg-surface-2:  #FBFAF6;
  --bg-sunken:     #EFECE3;
  --bg-inverse:    var(--saaha-navy-800);

  --fg-1:          #1A2332;     /* primary text */
  --fg-2:          #2D3748;     /* body */
  --fg-3:          #4A5568;     /* muted */
  --fg-4:          #718096;     /* secondary */
  --fg-inverse:    #F7F5F0;
  --fg-on-brand:   #FFFFFF;

  --border-1:      #E2E8F0;     /* default border */
  --border-2:      #CBD5E0;     /* strong */
  --border-brand:  var(--saaha-teal-700);

  --interactive:          var(--saaha-teal-700);
  --interactive-hover:    var(--saaha-teal-800);
  --interactive-subtle:   var(--saaha-teal-100);

  --overlay-scrim: rgba(15, 22, 32, 0.45);
}

/* ============================================================
   THEME: Sidebar Rail (dark)
   ============================================================ */
[data-theme="sidebar-rail"] {
  --bg-canvas:     #0F1620;
  --bg-surface:    #1A2332;
  --bg-surface-2:  #25304A;
  --bg-sunken:     #0A101A;
  --bg-inverse:    #F7F5F0;

  --fg-1:          #F5F3EE;
  --fg-2:          #D8DEE8;
  --fg-3:          #A4AEC2;
  --fg-4:          #7B8699;
  --fg-inverse:    #1A2332;
  --fg-on-brand:   #FFFFFF;

  --border-1:      rgba(255, 255, 255, 0.08);
  --border-2:      rgba(255, 255, 255, 0.16);
  --border-brand:  var(--saaha-teal-500);

  --interactive:          var(--saaha-teal-500);
  --interactive-hover:    var(--saaha-teal-300);
  --interactive-subtle:   rgba(58, 167, 170, 0.12);

  --overlay-scrim: rgba(0, 0, 0, 0.62);
}

/* ============================================================
   BASE TYPOGRAPHY
   ============================================================ */
html {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--lh-normal);
  color: var(--fg-2);
  background: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
}

.display, h1.display {
  font-size: var(--text-display);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  font-weight: var(--weight-bold);
  color: var(--fg-1);
}

h1, .h1 {
  font-size: var(--text-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  font-weight: var(--weight-bold);
  color: var(--fg-1);
}

h2, .h2 {
  font-size: var(--text-h2);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-snug);
  font-weight: var(--weight-semibold);
  color: var(--fg-1);
}

h3, .h3 {
  font-size: var(--text-h3);
  line-height: var(--lh-snug);
  font-weight: var(--weight-semibold);
  color: var(--fg-1);
}

h4, .h4 {
  font-size: var(--text-h4);
  line-height: var(--lh-snug);
  font-weight: var(--weight-semibold);
  color: var(--fg-1);
}

p, .body {
  font-size: var(--text-body);
  line-height: var(--lh-relaxed);
  color: var(--fg-2);
}

.small { font-size: var(--text-small); line-height: var(--lh-normal); color: var(--fg-3); }
.micro { font-size: var(--text-micro); line-height: var(--lh-normal); color: var(--fg-4); }

.eyebrow, .overline {
  font-size: var(--text-micro);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  font-weight: var(--weight-semibold);
  color: var(--fg-3);
}

code, kbd, samp, pre, .mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

.code-inline {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 2px 6px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-sm);
  color: var(--fg-1);
}

a { color: var(--interactive); text-decoration: none; }
a:hover { color: var(--interactive-hover); text-decoration: underline; text-underline-offset: 2px; }

/* Focus ring — consistent, visible, Section 508-friendly */
*:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}