/* ==========================================
   Design Tokens - Donfra UI System
   Unified design variables for consistent styling
   Using rem for scalability, % for fluidity
   Base: 1rem = 16px (desktop), 14px (mobile)
   ========================================== */

:root {
  /* ===== Base Font Size ===== */
  font-size: 16px;

  /* ===== Colors ===== */
  /* Background */
  --color-bg-primary: #0B0C0C;
  --color-bg-secondary: #0F1211;
  --color-bg-panel: #0F1815;
  --color-bg-panel-deep: #0D100F;
  --color-bg-overlay: rgba(0, 0, 0, 0.6);

  /* Accent - Brass/Gold theme */
  --color-brass-primary: #A98E64;
  --color-brass-light: #D0B273;
  --color-brass-muted: rgba(169, 142, 100, 0.3);
  --color-brass-hover: rgba(169, 142, 100, 0.6);

  /* Text */
  --color-text-primary: #E9E9E7;
  --color-text-strong: #F5F5F3;
  --color-text-soft: #CFCFCA;
  --color-text-mid: #B9B9B4;
  --color-text-muted: #A98E64;

  /* Border */
  --color-border-default: rgba(169, 142, 100, 0.3);
  --color-border-focus: rgba(169, 142, 100, 0.55);
  --color-border-strong: rgba(169, 142, 100, 0.45);
  --color-border-subtle: rgba(192, 192, 192, 0.22);

  /* Status colors */
  --color-success: #4CAF50;
  --color-error: #F44336;
  --color-warning: #FF9800;
  --color-info: #2196F3;

  /* ===== Typography ===== */
  /* Font Families */
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Rajdhani', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-code: 'Share Tech Mono', monospace;

  /* Font Sizes - rem based (scales with root font-size) */
  --font-size-xs: 0.6875rem;   /* 11px at 16px base */
  --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: 2rem;       /* 32px */
  --font-size-4xl: 2.5rem;     /* 40px */

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;
  --line-height-loose: 1.75;

  /* Letter Spacing */
  --letter-spacing-tight: -0.01em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.04em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.0625rem;

  /* ===== Spacing - rem based ===== */
  --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 */

  /* ===== Layout - percentage based ===== */
  --width-quarter: 25%;
  --width-third: 33.333%;
  --width-half: 50%;
  --width-two-thirds: 66.666%;
  --width-three-quarters: 75%;
  --width-full: 100%;

  /* Container max-widths */
  --container-sm: 40rem;    /* 640px */
  --container-md: 48rem;    /* 768px */
  --container-lg: 64rem;    /* 1024px */
  --container-xl: 80rem;    /* 1280px */

  /* ===== Border Radius - rem based ===== */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.625rem;   /* 10px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-full: 9999px;

  /* ===== Shadows ===== */
  --shadow-sm: 0 0.0625rem 0.1875rem rgba(0, 0, 0, 0.12);
  --shadow-md: 0 0.25rem 0.375rem rgba(0, 0, 0, 0.16);
  --shadow-lg: 0 0.625rem 1.25rem rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 0.625rem 2.5rem rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 1.5rem rgba(0, 0, 0, 0.5);

  /* ===== Transitions ===== */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* ===== Z-Index ===== */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 1000;
  --z-popover: 1100;
  --z-tooltip: 1200;

  /* ===== Component Sizes ===== */
  --header-height: 4.5rem;     /* 72px */
  --sidebar-width: 16rem;      /* 256px */
  --input-height-sm: 2rem;     /* 32px */
  --input-height-md: 2.5rem;   /* 40px */
  --input-height-lg: 3rem;     /* 48px */
  --button-height-sm: 2rem;    /* 32px */
  --button-height-md: 2.5rem;  /* 40px */
  --button-height-lg: 3rem;    /* 48px */

  /* ===== Breakpoints (for reference) ===== */
  --breakpoint-xs: 20rem;      /* 320px */
  --breakpoint-sm: 30rem;      /* 480px */
  --breakpoint-md: 48rem;      /* 768px */
  --breakpoint-lg: 64rem;      /* 1024px */
  --breakpoint-xl: 80rem;      /* 1280px */
}

/* ===== Mobile - Small screens ===== */
@media (max-width: 480px) {
  :root {
    font-size: 14px;  /* Slightly smaller base */

    /* Tighter spacing on mobile */
    --space-6: 1.25rem;
    --space-8: 1.5rem;
    --space-12: 2rem;

    /* Smaller header */
    --header-height: 3.5rem;
  }
}

/* ===== Tablet ===== */
@media (min-width: 481px) and (max-width: 768px) {
  :root {
    font-size: 15px;
  }
}

/* ===== Desktop - Large screens ===== */
@media (min-width: 1280px) {
  :root {
    font-size: 17px;  /* Slightly larger for big screens */
  }
}

/* ===== Utility Classes ===== */
/* These use the token variables */

/* Width utilities */
.w-quarter { width: var(--width-quarter); }
.w-third { width: var(--width-third); }
.w-half { width: var(--width-half); }
.w-two-thirds { width: var(--width-two-thirds); }
.w-three-quarters { width: var(--width-three-quarters); }
.w-full { width: var(--width-full); }

/* Max-width containers */
.container-sm { max-width: var(--container-sm); margin-inline: auto; }
.container-md { max-width: var(--container-md); margin-inline: auto; }
.container-lg { max-width: var(--container-lg); margin-inline: auto; }
.container-xl { max-width: var(--container-xl); margin-inline: auto; }

/* Responsive padding using clamp() */
.p-responsive {
  padding: clamp(var(--space-3), 4vw, var(--space-6));
}
.px-responsive {
  padding-inline: clamp(var(--space-3), 5vw, var(--space-8));
}
.py-responsive {
  padding-block: clamp(var(--space-4), 4vh, var(--space-8));
}

/* Responsive gap */
.gap-responsive {
  gap: clamp(var(--space-2), 2vw, var(--space-4));
}

/* Fluid typography using clamp() */
.text-fluid-sm {
  font-size: clamp(var(--font-size-sm), 1.5vw, var(--font-size-base));
}
.text-fluid-md {
  font-size: clamp(var(--font-size-base), 2vw, var(--font-size-lg));
}
.text-fluid-lg {
  font-size: clamp(var(--font-size-lg), 2.5vw, var(--font-size-2xl));
}
.text-fluid-xl {
  font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-3xl));
}
.text-fluid-2xl {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
}