/* =========================================
   METRO TEHRAN — DESIGN SYSTEM
   ========================================= */

/* Import Vazirmatn Font */
@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@100;200;300;400;500;600;700;800;900&display=swap');

/* =========================================
   CSS CUSTOM PROPERTIES
   ========================================= */
:root {
  /* — Metro Line Colors — */
  /* رنگ‌های رسمی مترو تهران */
  --line-1: #E8312A;
  --line-1-light: #FFEDED;
  --line-1-dark: #C0201A;
  --line-2: #1A3C8F;
  --line-2-light: #E8EFFE;
  --line-2-dark: #122B6B;
  --line-3: #29ABE2;
  --line-3-light: #E6F7FD;
  --line-3-dark: #1A8DB8;
  --line-4: #F5A800;
  --line-4-light: #FEF6E0;
  --line-4-dark: #C98D00;
  --line-5: #00A651;
  --line-5-light: #E0F5EA;
  --line-5-dark: #007A3D;
  --line-6: #E5007D;
  --line-6-light: #FCE0EF;
  --line-6-dark: #B80062;
  --line-7: #7B2D8B;
  --line-7-light: #F2E5F5;
  --line-7-dark: #5C2169;
  --line-prand: #E8312A;
  --line-prand-light: #FFEDED;
  --line-airport4: #F5A800;
  --line-airport4-light: #FEF6E0;

  /* — Semantic Colors (Light Mode) — */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F8F9FA;
  --color-bg-tertiary: #F0F2F5;
  --color-bg-elevated: #FFFFFF;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);

  --color-surface: #FFFFFF;
  --color-surface-raised: #FFFFFF;
  --color-surface-overlay: rgba(255,255,255,0.95);

  --color-text-primary: #0F1117;
  --color-text-secondary: #4B5563;
  --color-text-tertiary: #9CA3AF;
  --color-text-disabled: #D1D5DB;
  --color-text-inverse: #FFFFFF;
  --color-text-on-color: #FFFFFF;

  --color-border: #E5E7EB;
  --color-border-strong: #D1D5DB;
  --color-border-focus: #2563EB;

  --color-accent: #2563EB;
  --color-accent-light: #EFF6FF;
  --color-accent-hover: #1D4ED8;

  --color-success: #10B981;
  --color-success-light: #ECFDF5;
  --color-warning: #F59E0B;
  --color-warning-light: #FFFBEB;
  --color-error: #EF4444;
  --color-error-light: #FEF2F2;
  --color-info: #06B6D4;
  --color-info-light: #ECFEFF;

  /* — Shadows — */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
  --shadow-2xl: 0 25px 50px rgba(0,0,0,0.25);
  --shadow-inset: inset 0 2px 4px rgba(0,0,0,0.06);
  --shadow-bottom-nav: 0 -1px 0 rgba(0,0,0,0.08), 0 -4px 16px rgba(0,0,0,0.06);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-float: 0 8px 24px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.08);

  /* — Typography — */
  --font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Courier New', monospace;

  --font-size-xs: 0.6875rem;    /* 11px */
  --font-size-sm: 0.75rem;      /* 12px */
  --font-size-base: 0.875rem;   /* 14px */
  --font-size-md: 1rem;         /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */

  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0em;
  --letter-spacing-wide: 0.025em;

  /* — Spacing Scale — */
  --space-0: 0;
  --space-1: 0.25rem;    /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.25rem;    /* 20px */
  --space-6: 1.5rem;     /* 24px */
  --space-8: 2rem;       /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */

  /* — Border Radius — */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-3xl: 32px;
  --radius-full: 9999px;

  /* — Z-Index Scale — */
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
  --z-splash: 600;

  /* — Animation — */
  --duration-instant: 0ms;
  --duration-fast: 100ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 400ms;
  --duration-slowest: 600ms;

  --ease-linear: linear;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-apple: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* — Layout — */
  --nav-height: 64px;
  --header-height: 56px;
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
  --content-max-width: 480px;

  /* — Glass Morphism — */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-bg-dark: rgba(30, 30, 35, 0.85);
  --glass-blur: blur(20px);
  --glass-border: rgba(255, 255, 255, 0.2);
}

/* =========================================
   DARK MODE
   ========================================= */
[data-theme="dark"] {
  --color-bg-primary: #0A0A0F;
  --color-bg-secondary: #111118;
  --color-bg-tertiary: #1A1A24;
  --color-bg-elevated: #1E1E2A;
  --color-bg-overlay: rgba(0, 0, 0, 0.7);

  --color-surface: #1E1E2A;
  --color-surface-raised: #252535;
  --color-surface-overlay: rgba(20, 20, 30, 0.95);

  --color-text-primary: #F0F0F5;
  --color-text-secondary: #A0A0B0;
  --color-text-tertiary: #606070;
  --color-text-disabled: #404050;
  --color-text-inverse: #0A0A0F;

  --color-border: #252535;
  --color-border-strong: #353545;
  --color-border-focus: #3B82F6;

  --color-accent: #3B82F6;
  --color-accent-light: #1E2D4A;
  --color-accent-hover: #2563EB;

  --color-success-light: #0D2B1E;
  --color-warning-light: #2B1E0D;
  --color-error-light: #2B0D0D;
  --color-info-light: #0D252B;

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.5), 0 4px 6px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.5), 0 10px 10px rgba(0,0,0,0.4);
  --shadow-2xl: 0 25px 50px rgba(0,0,0,0.6);
  --shadow-bottom-nav: 0 -1px 0 rgba(255,255,255,0.06), 0 -4px 16px rgba(0,0,0,0.3);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2);
  --shadow-float: 0 8px 24px rgba(0,0,0,0.4), 0 2px 8px rgba(0,0,0,0.3);

  --glass-bg: rgba(20, 20, 30, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);

  --line-1-light: #2A1010;
  --line-2-light: #0D1828;
  --line-3-light: #0D2030;
  --line-4-light: #2B1E00;
  --line-5-light: #0D2B14;
  --line-6-light: #2B0020;
  --line-7-light: #1A0D22;
}