/**
 * Bayan Design System — Theme Tokens
 * Comfortable palettes for long Arabic reading (Notion / Grammarly inspired)
 */

/* ── Shared structural tokens ── */
:root {
  --font-family-primary: 'Cairo', 'Tajawal', 'Noto Sans Arabic', sans-serif;

  --font-size-display: 3rem;
  --font-size-h1: 2.25rem;
  --font-size-h2: 1.875rem;
  --font-size-h3: 1.25rem;
  --font-size-body: 1rem;
  --font-size-editor: 1.125rem;
  --font-size-caption: 0.875rem;
  --font-size-label: 0.75rem;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-editor: 1.9;
  --line-height-body: 1.75;
  --letter-spacing-arabic: 0.015em;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-section: 6rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-card: 1rem;

  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Dark Theme — soft charcoal, easy on eyes ── */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  --color-bg: #12141A;
  --color-surface: #1A1D26;
  --color-surface-elevated: #242833;
  --color-editor: #1E2229;

  --color-primary: #6BA3E0;
  --color-secondary: #A594E8;
  --color-accent: #6BBECF;

  --color-success: #6BC98A;
  --color-warning: #E4B35A;
  --color-error: #E88A8A;

  --color-text-primary: #ECEEF2;
  --color-text-secondary: #B4BBC6;
  --color-text-muted: #8A939F;
  --color-text-inverse: #F4F5F7;
  --color-placeholder: #9AA3AE;

  --color-border: rgba(236, 238, 242, 0.09);
  --color-border-strong: rgba(236, 238, 242, 0.16);

  --focus-ring: rgba(107, 163, 224, 0.42);

  --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.16);
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.28);
  --shadow-popover: 0 16px 40px rgba(0, 0, 0, 0.38);
  --shadow-editor: 0 2px 16px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(107, 163, 224, 0.15);

  --gradient-primary: linear-gradient(135deg, #6BA3E0, #A594E8);
  --gradient-surface: linear-gradient(180deg, var(--color-surface), var(--color-bg));

  --color-overlay: rgba(8, 10, 14, 0.62);

  --highlight-spelling-bg: rgba(232, 138, 138, 0.16);
  --highlight-spelling-border: #E88A8A;
  --highlight-grammar-bg: rgba(228, 179, 90, 0.16);
  --highlight-grammar-border: #E4B35A;
  --highlight-punctuation-bg: rgba(107, 201, 138, 0.14);
  --highlight-punctuation-border: #6BC98A;

  --color-nav-bg: rgba(18, 20, 26, 0.94);
  --color-badge-spelling-bg: rgba(232, 138, 138, 0.18);
  --color-badge-grammar-bg: rgba(228, 179, 90, 0.18);
  --color-badge-punctuation-bg: rgba(107, 201, 138, 0.16);
  --color-summary-accent-bg: rgba(165, 148, 232, 0.14);
  --color-summary-accent-border: rgba(165, 148, 232, 0.38);
  --color-suggestion-hover-bg: rgba(107, 163, 224, 0.12);
  --color-primary-subtle-bg: rgba(107, 163, 224, 0.14);
  --color-primary-subtle-border: rgba(107, 163, 224, 0.32);

  --primary-color: var(--color-primary);
  --secondary-color: var(--color-secondary);
  --text-color: var(--color-text-primary);
  --text-secondary: var(--color-text-secondary);
  --surface-color: var(--color-surface);
  --background-color: var(--color-bg);
  --success-color: var(--color-success);
  --warning-color: var(--color-warning);
  --error-color: var(--color-error);
  --nav-bg: var(--color-nav-bg);
}

/* ── Light Theme — warm paper, strong readable text ── */
[data-theme="light"] {
  color-scheme: light;

  --color-bg: #F3F1EC;
  --color-surface: #FAF9F6;
  --color-surface-elevated: #EFEBE4;
  --color-editor: #FFFDF8;

  --color-primary: #2B6CB8;
  --color-secondary: #6B57A8;
  --color-accent: #2A8F9E;

  --color-success: #2F8554;
  --color-warning: #B7791F;
  --color-error: #C53030;

  --color-text-primary: #1A1D21;
  --color-text-secondary: #3A424E;
  --color-text-muted: #5A6472;
  --color-text-inverse: #FAFAF8;
  --color-placeholder: #6B7580;

  --color-border: rgba(26, 29, 33, 0.1);
  --color-border-strong: rgba(26, 29, 33, 0.18);

  --focus-ring: rgba(43, 108, 184, 0.32);

  --shadow-xs: 0 1px 3px rgba(26, 29, 33, 0.05);
  --shadow-card: 0 6px 20px rgba(26, 29, 33, 0.07);
  --shadow-popover: 0 14px 36px rgba(26, 29, 33, 0.11);
  --shadow-editor: 0 1px 8px rgba(26, 29, 33, 0.05);
  --shadow-glow: 0 0 20px rgba(43, 108, 184, 0.1);

  --gradient-primary: linear-gradient(135deg, #2B6CB8, #6B57A8);
  --gradient-surface: linear-gradient(180deg, var(--color-surface), var(--color-bg));

  --color-overlay: rgba(26, 29, 33, 0.38);

  --highlight-spelling-bg: #FDECEC;
  --highlight-spelling-border: #C53030;
  --highlight-grammar-bg: #FEF6E4;
  --highlight-grammar-border: #B7791F;
  --highlight-punctuation-bg: #EAF6EE;
  --highlight-punctuation-border: #2F8554;

  --color-nav-bg: rgba(250, 249, 246, 0.94);
  --color-badge-spelling-bg: rgba(197, 48, 48, 0.1);
  --color-badge-grammar-bg: rgba(183, 121, 31, 0.12);
  --color-badge-punctuation-bg: rgba(47, 133, 84, 0.1);
  --color-summary-accent-bg: rgba(107, 87, 168, 0.08);
  --color-summary-accent-border: rgba(107, 87, 168, 0.22);
  --color-suggestion-hover-bg: rgba(43, 108, 184, 0.07);
  --color-primary-subtle-bg: rgba(43, 108, 184, 0.09);
  --color-primary-subtle-border: rgba(43, 108, 184, 0.22);

  --primary-color: var(--color-primary);
  --secondary-color: var(--color-secondary);
  --text-color: var(--color-text-primary);
  --text-secondary: var(--color-text-secondary);
  --surface-color: var(--color-surface);
  --background-color: var(--color-bg);
  --success-color: var(--color-success);
  --warning-color: var(--color-warning);
  --error-color: var(--color-error);
  --nav-bg: var(--color-nav-bg);
}