/* ==========================================================================
   src/styles/base.css
   Design System Tokens, Color Palettes (Light, Dark, Sepia, High-Contrast),
   Global Motion System Variables, SVG Crisp Rendering, and Global Resets
   ========================================================================== */

:root, [data-theme="light"] {
  --bg-primary: #FAF9F6;
  --bg-secondary: #F2EFE9;
  --bg-surface: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --bg-hover: #EAE6DF;
  --bg-active: #E0DBD1;
  --text-primary: #18181B;
  --text-secondary: #52525B;
  --text-muted: #71717A;
  --border-color: #E4E2DD;
  --border-strong: #CBC7BE;
  --accent: #6B4F35;
  --accent-hover: #543D28;
  --accent-soft: #F3ECE4;
  --verse-num: #8C6D4F;
  --hl-yellow: rgba(234, 179, 8, 0.24);
  --hl-green: rgba(34, 197, 94, 0.22);
  --hl-blue: rgba(59, 130, 246, 0.20);
  --hl-rose: rgba(244, 63, 94, 0.20);
  --focus-ring: #6B4F35;
}

[data-theme="dark"] {
  --bg-primary: #121316;
  --bg-secondary: #1A1C20;
  --bg-surface: #181A1E;
  --bg-elevated: #22252A;
  --bg-hover: #262930;
  --bg-active: #2F333C;
  --text-primary: #E6E4E0;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  --border-color: #2A2D34;
  --border-strong: #3F434E;
  --accent: #C8A97E;
  --accent-hover: #D9BE98;
  --accent-soft: rgba(200, 169, 126, 0.14);
  --verse-num: #C8A97E;
  --hl-yellow: rgba(234, 179, 8, 0.28);
  --hl-green: rgba(34, 197, 94, 0.26);
  --hl-blue: rgba(59, 130, 246, 0.26);
  --hl-rose: rgba(244, 63, 94, 0.26);
  --focus-ring: #C8A97E;
}

[data-theme="sepia"] {
  --bg-primary: #F4ECD8;
  --bg-secondary: #EAE0C8;
  --bg-surface: #F9F4E8;
  --bg-elevated: #FDF9F0;
  --bg-hover: #E4D8BE;
  --bg-active: #D8C9AA;
  --text-primary: #3B2B1D;
  --text-secondary: #5C4632;
  --text-muted: #846A52;
  --border-color: #DCD0B8;
  --border-strong: #C4B497;
  --accent: #7C4D25;
  --accent-hover: #613B1B;
  --accent-soft: #E8DCC4;
  --verse-num: #8C5828;
  --hl-yellow: rgba(217, 155, 26, 0.28);
  --hl-green: rgba(46, 150, 78, 0.24);
  --hl-blue: rgba(54, 115, 189, 0.22);
  --hl-rose: rgba(204, 71, 94, 0.22);
  --focus-ring: #7C4D25;
}

[data-contrast="high"][data-theme="light"] {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F0F0F0;
  --bg-surface: #FFFFFF;
  --text-primary: #000000;
  --text-secondary: #1F1F1F;
  --border-color: #888888;
  --accent: #3D2713;
}

[data-contrast="high"][data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #111111;
  --bg-surface: #0A0A0A;
  --text-primary: #FFFFFF;
  --text-secondary: #E0E0E0;
  --border-color: #666666;
  --accent: #F0D098;
}

:root {
  --ui-font: 'IBM Plex Sans Arabic', -apple-system, BlinkMacSystemFont, sans-serif;
  --reading-font: 'Amiri', Georgia, serif;
  --reading-size: 24px;
  --reading-line-height: 2.05;
  --reading-para-gap: 14px;
  --reading-max-width: 740px;

  /* Global Motion System Tokens (Durations & Easing Curves) */
  --motion-micro: 150ms;
  --motion-normal: 230ms;
  --motion-page: 260ms;
  --motion-modal: 280ms;
  --motion-drawer: 260ms;
  --ease-standard: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Central Motion Reduction via App Toggle OR OS System Preference */
[data-reduce-motion="true"] {
  --motion-micro: 0ms !important;
  --motion-normal: 0ms !important;
  --motion-page: 0ms !important;
  --motion-modal: 0ms !important;
  --motion-drawer: 0ms !important;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --motion-micro: 0ms !important;
    --motion-normal: 0ms !important;
    --motion-page: 0ms !important;
    --motion-modal: 0ms !important;
    --motion-drawer: 0ms !important;
  }
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  margin: 0;
  padding: 0;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--ui-font);
  direction: rtl;
  text-align: right;
  min-height: 100vh;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  padding-top: 4rem; /* Compensate for fixed 4rem (64px) top header */
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--ui-font);
  direction: rtl;
  text-align: right;
  overflow-x: clip;
  min-height: 100vh;
  transition: background-color var(--motion-normal) var(--ease-in-out-soft),
              color var(--motion-normal) var(--ease-in-out-soft);
}

[data-reduce-motion="true"] *,
[data-reduce-motion="true"] *::before,
[data-reduce-motion="true"] *::after {
  transition-duration: 0.001ms !important;
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  scroll-behavior: auto !important;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Task 2: Crisp SVG Icon Rendering System across Desktop & Mobile Sizes
   ========================================================================== */
svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  overflow: visible;
  shape-rendering: geometricPrecision;
  text-rendering: geometricPrecision;
  transition: transform var(--motion-micro) var(--ease-standard),
              color var(--motion-micro) var(--ease-standard),
              opacity var(--motion-micro) var(--ease-standard);
}

svg path,
svg circle,
svg rect,
svg line,
svg polyline,
svg polygon {
  vector-effect: non-scaling-stroke;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Standardized Reference Icon Size System */
.icon-xs { width: 0.875rem; height: 0.875rem; } /* 14px */
.icon-sm { width: 1rem; height: 1rem; }         /* 16px */
.icon-md { width: 1.125rem; height: 1.125rem; } /* 18px */
.icon-lg { width: 1.25rem; height: 1.25rem; }   /* 20px */
.icon-xl { width: 1.5rem; height: 1.5rem; }     /* 24px */

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
}

/* Accessible Focus Ring */
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}