:root {
  /* ── DrMoom Brand Kit — Modern Medical SaaS ── */

  /* Primary */
  --color-primary: #1E88E5;
  --color-primary-dark: #1976D2;
  --color-primary-darker: #1565C0;
  --color-primary-light: #42A5F5;
  --color-primary-superlight: #E3F2FD;
  --color-primary-muted: rgba(30, 136, 229, 0.1);

  /* Secondary */
  --color-secondary: #00ACC1;
  --color-secondary-dark: #0097A7;
  --color-secondary-light: #26C6DA;

  --color-accent: #00ACC1;
  --color-accent-dark: #0097A7;
  --color-accent-light: #4DD0E1;

  /* Status */
  --color-success: #22C55E;
  --color-success-dark: #16A34A;
  --color-success-light: #4ADE80;
  --color-success-faint: rgba(34, 197, 94, 0.1);

  --color-warning: #F59E0B;
  --color-warning-dark: #D97706;
  --color-warning-light: #FBBF24;
  --color-warning-faint: rgba(245, 158, 11, 0.1);

  --color-danger: #EF4444;
  --color-danger-dark: #DC2626;
  --color-danger-light: #F87171;
  --color-danger-faint: rgba(239, 68, 68, 0.1);

  --color-info: #1E88E5;
  --color-info-dark: #1976D2;
  --color-info-light: #42A5F5;
  --color-info-faint: rgba(30, 136, 229, 0.1);

  /* Neutrals */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;

  /* Surfaces */
  --color-bg: #FFFFFF;
  --color-surface: #F8FAFC;
  --color-surface-variant: #F1F5F9;
  --color-surface-elevated: #FFFFFF;
  --color-surface-muted: #F8FAFC;

  /* Border */
  --color-border: #E5E7EB;
  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  --border-strong: #9CA3AF;

  /* Text */
  --color-text-primary: #111827;
  --color-text-secondary: #374151;
  --color-text-tertiary: #6B7280;
  --color-text-muted: #9CA3AF;
  --color-text-inverse: #FFFFFF;

  /* Dark mode surfaces (kept calm) */
  --color-bg-dark: #0F172A;
  --color-surface-dark: #1E293B;
  --color-surface-variant-dark: #334155;
  --color-surface-elevated-dark: #1E293B;
  --color-surface-muted-dark: #334155;

  --color-border-dark: #334155;
  --border-light-dark: #334155;
  --border-medium-dark: #475569;
  --border-strong-dark: #64748B;

  --color-text-primary-dark: #F8FAFC;
  --color-text-secondary-dark: #CBD5E1;
  --color-text-tertiary-dark: #94A3B8;
  --color-text-muted-dark: #64748B;
  --color-text-inverse-dark: #0F172A;

  /* Typography */
  --font-family-primary: 'Vazirmatn', 'IRANSansX', Tahoma, sans-serif;
  --font-family-latin: 'Inter', sans-serif;
  --font-family-mono: 'Fira Code', 'Courier New', monospace;

  --font-size-xs: 0.75rem; /* 12px caption */
  --font-size-sm: 0.875rem; /* 14px small */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 2rem; /* 32px */
  --font-size-4xl: 2.5rem; /* 40px */
  --font-size-5xl: 3rem; /* 48px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 700;

  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;
  --leading-loose: 2;

  /* Spacing (multiples of 4) */
  --space-0: 0px;
  --space-px: 1px;
  --space-0-5: 2px;
  --space-1: 4px;
  --space-1-5: 6px;
  --space-2: 8px;
  --space-2-5: 10px;
  --space-3: 12px;
  --space-3-5: 14px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-9: 36px;
  --space-10: 40px;
  --space-11: 44px;
  --space-12: 48px;
  --space-14: 56px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-28: 112px;
  --space-32: 128px;

  /* Radius */
  --radius-none: 0px;
  --radius-sm: 6px;
  --radius: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-3xl: 24px;
  --radius-full: 999px;

  /* Shadows */
  --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
  --shadow-2xl: 0 24px 48px rgba(0, 0, 0, 0.14);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.04);

  /* Focus ring */
  --ring-offset-width: 2px;
  --ring-offset-color: #fff;
  --ring-width: 4px;
  --ring-color: rgba(30, 136, 229, 0.15);
  --ring-offset-shadow: 0 0 #0000;
  --ring-shadow: 0 0 0 var(--ring-width) var(--ring-color);

  /* Motion — subtle only */
  --transition-none: none;
  --transition-auto: all 200ms ease-in-out;
  --transition-fast: 200ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 200ms ease-in-out;

  /* Layout */
  --sidebar-width: 272px;
  --header-height: 64px;
  --page-max-width: 1280px;
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  --grid-gap: 24px;
  --card-padding: 24px;
  --input-height: 48px;
  --btn-height: 48px;

  /* Semantic aliases */
  --color-text: var(--color-text-primary);
  --color-muted: var(--color-text-tertiary);
  --color-primary-soft: var(--color-primary-muted);
  --color-primary-faint: var(--color-primary-muted);
  --color-success-soft: var(--color-success-faint);
  --color-warning-soft: var(--color-warning-faint);
  --color-danger-soft: var(--color-danger-faint);
  --color-info-soft: var(--color-info-faint);
  --color-border-strong: var(--border-strong);
  --color-header-bg: #FFFFFF;
  --color-card-bg: var(--color-surface-elevated);
  --color-input-bg: #FFFFFF;
  --color-hover: rgba(17, 24, 39, 0.04);
  --color-sidebar-bg: #FFFFFF;
  --color-sidebar-active: var(--color-primary-muted);
  --font-size-xxs: 0.625rem;

  /* Z-index */
  --z-index-0: 0;
  --z-index-10: 10;
  --z-index-20: 20;
  --z-index-30: 30;
  --z-index-40: 40;
  --z-index-50: 50;
}

/*
 * Dark theme — Telegram-inspired night UI
 * Deep navy canvas, layered surfaces, soft blue accent, low-contrast borders
 */
[data-theme="dark"] {
  color-scheme: dark;

  --color-bg: #0E1621;
  --color-surface: #17212B;
  --color-surface-variant: #1C2733;
  --color-surface-elevated: #232E3C;
  --color-surface-muted: #1C2733;

  --color-bg-dark: #0E1621;
  --color-surface-dark: #17212B;
  --color-surface-variant-dark: #1C2733;
  --color-surface-elevated-dark: #232E3C;
  --color-surface-muted-dark: #1C2733;

  --color-border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.05);
  --border-medium: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.14);
  --color-border-dark: rgba(255, 255, 255, 0.06);
  --border-light-dark: rgba(255, 255, 255, 0.05);
  --border-medium-dark: rgba(255, 255, 255, 0.09);
  --border-strong-dark: rgba(255, 255, 255, 0.14);

  --color-text-primary: #F5F5F5;
  --color-text-secondary: #B8C4CE;
  --color-text-tertiary: #7F91A4;
  --color-text-muted: #6D7F8F;
  --color-text-inverse: #0E1621;
  --color-text-primary-dark: #F5F5F5;
  --color-text-secondary-dark: #B8C4CE;
  --color-text-tertiary-dark: #7F91A4;
  --color-text-muted-dark: #6D7F8F;
  --color-text-inverse-dark: #0E1621;

  --color-primary: #2AABEE;
  --color-primary-dark: #229ED9;
  --color-primary-darker: #1B8BC4;
  --color-primary-light: #6AB3F3;
  --color-primary-superlight: rgba(42, 171, 238, 0.14);
  --color-primary-muted: rgba(42, 171, 238, 0.16);

  --color-secondary: #40C4D4;
  --color-secondary-dark: #26A7B8;
  --color-secondary-light: #5ED7E5;
  --color-accent: #40C4D4;
  --color-accent-dark: #26A7B8;
  --color-accent-light: #5ED7E5;

  --color-success: #4CAF50;
  --color-success-dark: #43A047;
  --color-success-light: #66BB6A;
  --color-success-faint: rgba(76, 175, 80, 0.16);

  --color-warning: #F0A020;
  --color-warning-dark: #E09112;
  --color-warning-light: #FFB74D;
  --color-warning-faint: rgba(240, 160, 32, 0.16);

  --color-danger: #E53935;
  --color-danger-dark: #D32F2F;
  --color-danger-light: #EF5350;
  --color-danger-faint: rgba(229, 57, 53, 0.16);

  --color-info: #2AABEE;
  --color-info-dark: #229ED9;
  --color-info-light: #6AB3F3;
  --color-info-faint: rgba(42, 171, 238, 0.16);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.28);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.28);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.32);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.34);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.42);
  --shadow-2xl: 0 20px 48px rgba(0, 0, 0, 0.45);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.35);

  --ring-color: rgba(42, 171, 238, 0.28);
  --ring-offset-color: #0E1621;

  --color-text: var(--color-text-primary);
  --color-muted: var(--color-text-tertiary);
  --color-primary-soft: var(--color-primary-muted);
  --color-primary-faint: var(--color-primary-muted);
  --color-success-soft: var(--color-success-faint);
  --color-warning-soft: var(--color-warning-faint);
  --color-danger-soft: var(--color-danger-faint);
  --color-info-soft: var(--color-info-faint);
  --color-border-strong: var(--border-strong);

  --color-header-bg: #17212B;
  --color-card-bg: #232E3C;
  --color-input-bg: #242F3D;
  --color-hover: rgba(255, 255, 255, 0.04);
  --color-sidebar-bg: #17212B;
  --color-sidebar-active: rgba(42, 171, 238, 0.16);
}