/* ================== 2. Variables ================== */
/* Central design tokens for the entire project.
   These variables define color, spacing, typography, motion, etc.
   Update here to apply consistent changes globally. */

:root {
  /* ------------------- Colours ------------------- */
  /* Core brand + UI colours */
  --primary: #0b3072;
  --primary-dark: #092a63;
  --accent: #029fd4;
  --white: #fff;
  --black: #000;

  /* Text colours */
  --text: #333;
  --text-muted: #666;

  /* Backgrounds */
  --bg-light: #f8fbff;
  --bg-accent-light: #eef4ff;

  /* Borders / neutral UI */
  --border: #ccc;

  /* ------------------- Font Sizes ------------------- */
  /* Fluid scale from small UI text to large headings */
  --text-xs: 0.8125rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.0625rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.375rem;
  --text-3xl: 1.625rem;

  /* ------------------- Font Weights ------------------- */
  /* Keep consistent naming across components */
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* ------------------- Line Heights ------------------- */
  /* Tuned for readability at different text sizes */
  --lh-tight: 1.25; /* headings */
  --lh-snug: 1.3; /* subheadings */
  --lh-normal: 1.4; /* UI text */
  --lh-base: 1.6; /* default body */
  --lh-relaxed: 1.75; /* long-form text */

  /* ------------------- Border Radius ------------------- */
  /* Consistent rounding across UI elements */
  --radius: 1rem;
  --radius-sm: 8px;

  /* ------------------- Borders ------------------- */
  /* Standard border tokens */
  --border-thick: 0.25rem;
  --border-dotted: 1px dotted var(--border);

  /* ------------------- Shadows ------------------- */
  /* Elevation system: small → large */
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

  /* Semantic shadow aliases (use these in components) */
  --shadow-card: var(--shadow);
  --shadow-quote: var(--shadow-md);
  --shadow-elevated: var(--shadow-lg);

  /* ------------------- Spacing Scale ------------------- */
  /* Based on a consistent rhythm (4px/8px system) */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-small-plus: 0.75rem;
  --space-md: 1rem;
  --space-md-plus: 1.5rem;
  --space-lg: 2rem;
  --space-xlg: 4rem;

  /* ------------------- Icon Sizes ------------------- */
  /* Standard sizes for inline SVG/icons */
  --icon-sm: 1rem;
  --icon-md: 1.5rem;
  --icon-lg: 2.5rem;

  /* ------------------- Content Widths ------------------- */
  /* Used for readable text containers */
  --content-narrow: 37.5rem;

  /* ------------------- Z-Index Scale ------------------- */
  /* Layering system to avoid arbitrary values */
  --z-base: 1;
  --z-dropdown: 100;
  --z-overlay: 1000;
  --z-modal: 2000;

  /* ------------------- Motion & Easing ------------------- */
  /* Standard easing curves */
  --ease-standard: ease;
  --ease-in-out: ease-in-out;

  /* Custom easing for smoother UI transitions */
  --ease-out-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-soft: cubic-bezier(0.4, 0, 0.2, 1);

  /* Timing durations */
  --motion-fast: 180ms;
  --motion-smooth: 320ms;
  --motion-delay: 60ms;

  /* Transition presets (preferred for consistency) */
  --transition-fast: var(--motion-fast) var(--ease-standard);
  --transition-base: 0.25s var(--ease-standard);
  --transition-slow: 0.35s var(--ease-standard);
  --transition-slower: 0.42s var(--ease-standard);

  /* Animation timing */
  --float-speed: 2s;

  /* ------------------- Misc ------------------- */
  /* Layout-specific values */
  --drawer-width: 280px;
}