/**
 * Ford Quang Tri - Design System Variables
 * Theme: Premium Ford Experience (Automotive Cinematic × Contemporary Editorial)
 */

:root {
  /* Brand Color Palette */
  --color-primary: #003478;         /* Official Ford Blue */
  --color-primary-light: #0A4E9E;   /* Medium Ford Blue */
  --color-primary-subtle: #EBF2FA;  /* Very Light Blue tint */
  --color-deep-navy: #00142D;       /* Deep Navy background */
  --color-dark-surface: #0B1523;    /* Cinematic dark surface */
  --color-dark-elevated: #132238;   /* Slightly lighter dark surface */

  /* Neutral & Base Colors */
  --color-white: #FFFFFF;
  --color-off-white: #F6F7F9;       /* Editorial off-white */
  --color-light-surface: #EDF1F5;   /* Refined light surface */
  --color-border: #E2E8F0;          /* Subtle light border */
  --color-border-dark: rgba(255, 255, 255, 0.12);

  /* Text & Contrast */
  --color-text-primary: #152234;    /* Sharp automotive slate */
  --color-text-secondary: #64748B;  /* Neutral slate gray */
  --color-text-muted: #94A3B8;      /* Muted gray */
  --color-text-on-dark: #FFFFFF;
  --color-text-on-dark-muted: rgba(255, 255, 255, 0.72);

  /* Accents */
  --color-accent-amber: #D97706;
  --color-accent-green: #10B981;
  --color-accent-blue: #38BDF8;

  /* Typography Stack */
  --font-display: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Font Scales */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.25rem;    /* 20px */
  --font-size-xl: 1.5rem;     /* 24px */
  --font-size-2xl: 2rem;      /* 32px */
  --font-size-3xl: 2.75rem;   /* 44px */
  --font-size-4xl: 3.75rem;   /* 60px */
  --font-size-5xl: 5rem;      /* 80px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.08;
  --line-height-snug: 1.25;
  --line-height-normal: 1.55;
  --line-height-relaxed: 1.7;

  /* Spacing Scale */
  --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 */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* Layout Containers */
  --container-max-width: 1440px;
  --container-padding: 2rem;    /* 32px on desktop */
  --header-height: 80px;

  /* Radii */
  --radius-xs: 2px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-subtle: 0 2px 10px rgba(0, 20, 45, 0.04);
  --shadow-card: 0 10px 30px rgba(0, 20, 45, 0.06);
  --shadow-hover: 0 20px 40px rgba(0, 20, 45, 0.12);
  --shadow-cinematic: 0 30px 60px rgba(0, 10, 25, 0.4);

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* Z-index layering */
  --z-base: 1;
  --z-dropdown: 1000;
  --z-sticky-header: 1020;
  --z-fixed-contact: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-back-to-top: 1025;
}