/* ============================================
   THEME SYSTEM — AEC-inspired warm palette
   Light: warm cream + gold accents
   Dark: warm charcoal + muted gold
   ============================================ */

:root,
[data-theme="light"] {
  /* Background — warm cream, not cold gray */
  --bg-primary: #F5F3EF;
  --bg-secondary: #FDFCFA;
  --bg-tertiary: #ECEAE5;
  --bg-hover: #E5E3DE;
  --bg-active: #DBD9D3;
  --bg-overlay: rgba(26, 29, 36, 0.5);
  --bg-glass: rgba(253, 252, 250, 0.85);

  /* Surface */
  --surface-primary: #FDFCFA;
  --surface-raised: #FFFFFF;
  --surface-sunken: #F0EDE8;

  /* Text — warm dark tones */
  --text-primary: #1A1D24;
  --text-secondary: #4A4740;
  --text-tertiary: #8A8680;
  --text-inverse: #F5F0EB;
  --text-on-accent: #1A1D24;

  /* Borders — warm */
  --border-primary: #D5D0C8;
  --border-secondary: #E5E2DC;
  --border-focus: #B8976A;

  /* Accent — muted gold */
  --accent: #B8976A;
  --accent-hover: #A68558;
  --accent-light: rgba(184, 151, 106, 0.1);
  --accent-muted: rgba(184, 151, 106, 0.06);

  /* Status */
  --success: #3D8B6E;
  --success-light: #EEF7F2;
  --warning: #C08C3A;
  --warning-light: #FDF6EB;
  --danger: #C0392B;
  --danger-light: #FDF0EE;
  --info: #4A7AB5;
  --info-light: #EDF3FA;

  /* Priority */
  --priority-urgent: #C0392B;
  --priority-high: #C08C3A;
  --priority-medium: #4A7AB5;
  --priority-low: #9CA098;

  /* Shadows — warm tinted */
  --shadow-xs: 0 1px 2px rgba(26, 29, 36, 0.04);
  --shadow-sm: 0 1px 3px rgba(26, 29, 36, 0.06), 0 1px 2px rgba(26, 29, 36, 0.03);
  --shadow-md: 0 4px 6px rgba(26, 29, 36, 0.06), 0 2px 4px rgba(26, 29, 36, 0.03);
  --shadow-lg: 0 10px 20px rgba(26, 29, 36, 0.08), 0 4px 8px rgba(26, 29, 36, 0.04);
  --shadow-xl: 0 20px 30px rgba(26, 29, 36, 0.1), 0 8px 12px rgba(26, 29, 36, 0.04);
  --shadow-card: 0 1px 3px rgba(26, 29, 36, 0.05), 0 1px 2px rgba(26, 29, 36, 0.03);
  --shadow-card-hover: 0 8px 20px rgba(26, 29, 36, 0.08), 0 3px 6px rgba(26, 29, 36, 0.04);
  --shadow-modal: 0 24px 48px rgba(26, 29, 36, 0.16);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Spacing */
  --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;

  /* Column */
  --column-width: 320px;
  --column-gap: 20px;

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-toast: 500;
  --z-drag: 600;

  /* Transition */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Scrollbar — gold tinted */
  --scrollbar-width: 6px;
  --scrollbar-track: transparent;
  --scrollbar-thumb: rgba(184, 151, 106, 0.25);
  --scrollbar-thumb-hover: rgba(184, 151, 106, 0.4);
}

/* ============================================
   DARK THEME — Warm charcoal + muted gold
   ============================================ */

[data-theme="dark"] {
  /* Background — warm charcoal from AEC */
  --bg-primary: #1A1D24;
  --bg-secondary: #22252D;
  --bg-tertiary: #22252D;
  --bg-hover: #2E3139;
  --bg-active: #383C45;
  --bg-overlay: rgba(0, 0, 0, 0.6);
  --bg-glass: rgba(26, 29, 36, 0.9);

  /* Surface */
  --surface-primary: #22252D;
  --surface-raised: #2A2E37;
  --surface-sunken: #1A1D24;

  /* Text — warm cream tones */
  --text-primary: #F5F0EB;
  --text-secondary: #B5B0A8;
  --text-tertiary: #7A766F;
  --text-inverse: #1A1D24;
  --text-on-accent: #1A1D24;

  /* Borders — warm, visible */
  --border-primary: #3D4048;
  --border-secondary: #2E3139;
  --border-focus: #C6A87D;

  /* Accent — gold from AEC */
  --accent: #C6A87D;
  --accent-hover: #D4BC98;
  --accent-light: rgba(198, 168, 125, 0.12);
  --accent-muted: rgba(198, 168, 125, 0.06);

  /* Status — muted for dark bg */
  --success: #5BB5A2;
  --success-light: rgba(91, 181, 162, 0.12);
  --warning: #D4A94E;
  --warning-light: rgba(212, 169, 78, 0.12);
  --danger: #D46B5E;
  --danger-light: rgba(212, 107, 94, 0.12);
  --info: #6B9FD4;
  --info-light: rgba(107, 159, 212, 0.12);

  /* Priority */
  --priority-urgent: #D46B5E;
  --priority-high: #D4A94E;
  --priority-medium: #6B9FD4;
  --priority-low: #7A766F;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.35), 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 30px rgba(0, 0, 0, 0.4), 0 8px 12px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 2px 4px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.02);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(198, 168, 125, 0.08);
  --shadow-modal: 0 24px 48px rgba(0, 0, 0, 0.5);

  /* Scrollbar — gold tinted */
  --scrollbar-thumb: rgba(198, 168, 125, 0.2);
  --scrollbar-thumb-hover: rgba(198, 168, 125, 0.35);
}