/* Copyright 2022-2026 Password Generator. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 * Design Tokens - CSS Custom Properties
 * Derived from src/ui/tokens.js
 */

:root {
  /* ============================================
   * Color Palette
   * ============================================ */

  /* Primary gradient (pink to purple) */
  --color-pink: #FF6B9D;
  --color-hot-pink: #FF4785;
  --color-purple: #9D4EDD;
  --color-violet: #7B2CBF;

  /* Accent colors */
  --color-cyan: #00D9FF;
  --color-mint: #3DFFA3;
  --color-peach: #FFB86C;
  --color-coral: #FF6B6B;

  /* Neutrals */
  --color-white: #FAFAFA;
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F4F4F5;
  --color-gray-200: #E4E4E7;
  --color-gray-300: #D4D4D8;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #71717A;
  --color-gray-600: #52525B;
  --color-gray-700: #4B5563;
  --color-gray-800: #374151;
  --color-gray-900: #18181B;

  /* ============================================
   * Typography
   * ============================================ */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', Menlo, monospace;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */

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

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;

  /* ============================================
   * Spacing
   * ============================================ */
  --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 */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */

  /* ============================================
   * Border Radius
   * ============================================ */
  --radius-none: 0;
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;

  /* ============================================
   * Shadows
   * ============================================ */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

  /* ============================================
   * Transitions
   * ============================================ */
  --duration-fast: 100ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 500ms;

  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ============================================
   * Z-Index Scale
   * ============================================ */
  --z-base: 0;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal-backdrop: 40;
  --z-modal: 50;
  --z-tooltip: 60;

  /* ============================================
   * Focus Ring
   * ============================================ */
  --focus-ring-width: 2px;
  --focus-ring-offset: 2px;
}

/* ============================================
 * Dark Theme (default)
 * ============================================ */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  /* Brand */
  --brand-primary: var(--color-pink);
  --brand-secondary: var(--color-purple);

  /* Feedback */
  --feedback-success: var(--color-mint);
  --feedback-warning: var(--color-peach);
  --feedback-error: var(--color-coral);
  --feedback-info: var(--color-cyan);

  /* Text - WCAG 2.2 AAA compliant contrast ratios */
  --text-primary: var(--color-white);
  --text-secondary: #D1D5DB; /* Improved from gray-400 for AAA compliance (4.5:1+ contrast) */
  --text-muted: #9CA3AF; /* Improved for better readability */
  --text-disabled: var(--color-gray-600);

  /* Background */
  --bg-primary: var(--color-gray-900);
  --bg-secondary: var(--color-gray-800);
  --bg-elevated: var(--color-gray-700);
  --bg-overlay: rgba(0, 0, 0, 0.6);

  /* Border */
  --border-default: var(--color-gray-700);
  --border-focus: var(--color-pink);
  --border-error: var(--color-coral);

  /* Interactive */
  --interactive-default: var(--color-cyan);
  --interactive-hover: var(--color-pink);
  --interactive-active: var(--color-purple);
  --interactive-focus: var(--color-pink);

  /* Strength */
  --strength-weak: var(--color-coral);
  --strength-medium: var(--color-peach);
  --strength-strong: var(--color-mint);
  --strength-maximum: var(--color-mint);

  /* Input */
  --input-bg: var(--color-gray-800);
  --input-border: var(--color-gray-600);
  --input-text: var(--color-white);
  --input-placeholder: var(--color-gray-500);

  /* Button Primary */
  --btn-primary-bg: var(--color-pink);
  --btn-primary-text: var(--color-gray-900);
  --btn-primary-hover-bg: var(--color-hot-pink);

  /* Button Secondary */
  --btn-secondary-bg: transparent;
  --btn-secondary-text: var(--color-pink);
  --btn-secondary-border: var(--color-pink);
  --btn-secondary-hover-bg: rgba(255, 107, 157, 0.1);

  /* Card */
  --card-bg: var(--color-gray-800);
  --card-border: var(--color-gray-700);

  /* Focus Ring */
  --focus-ring-color: rgba(255, 107, 157, 0.5);

  /* Shadows (darker for dark mode) */
  --shadow-colored: 0 4px 14px 0 rgba(255, 107, 157, 0.15);
}

/* ============================================
 * Light Theme
 * ============================================ */
[data-theme="light"] {
  color-scheme: light;

  /* Brand */
  --brand-primary: #D14671;
  --brand-secondary: #7B2CBF;

  /* Feedback */
  --feedback-success: #059669;
  --feedback-warning: #C2410C;
  --feedback-error: #DC2626;
  --feedback-info: #0891B2;

  /* Text */
  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-500);
  --text-disabled: var(--color-gray-300);

  /* Background */
  --bg-primary: var(--color-gray-50);
  --bg-secondary: var(--color-gray-100);
  --bg-elevated: var(--color-white);
  --bg-overlay: rgba(0, 0, 0, 0.4);

  /* Border */
  --border-default: var(--color-gray-200);
  --border-focus: #D14671;
  --border-error: #DC2626;

  /* Interactive */
  --interactive-default: #0891B2;
  --interactive-hover: #D14671;
  --interactive-active: #7B2CBF;
  --interactive-focus: #D14671;

  /* Strength */
  --strength-weak: #DC2626;
  --strength-medium: #C2410C;
  --strength-strong: #059669;
  --strength-maximum: #059669;

  /* Input */
  --input-bg: var(--color-white);
  --input-border: var(--color-gray-300);
  --input-text: var(--color-gray-900);
  --input-placeholder: var(--color-gray-400);

  /* Button Primary */
  --btn-primary-bg: #D14671;
  --btn-primary-text: var(--color-white);
  --btn-primary-hover-bg: #B33D62;

  /* Button Secondary */
  --btn-secondary-bg: transparent;
  --btn-secondary-text: #D14671;
  --btn-secondary-border: #D14671;
  --btn-secondary-hover-bg: rgba(209, 70, 113, 0.08);

  /* Card */
  --card-bg: var(--color-white);
  --card-border: var(--color-gray-200);

  /* Focus Ring */
  --focus-ring-color: rgba(209, 70, 113, 0.4);

  /* Shadows (lighter for light mode) */
  --shadow-colored: 0 4px 14px 0 rgba(209, 70, 113, 0.1);
}

/* ============================================
 * Reduced Motion
 * ============================================ */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --duration-slower: 0ms;
  }
}