/* ==========================================================================
   Design Tokens & Theme Definitions
   ========================================================================== */

:root {
  /* Typography */
  --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-body: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* Fluid Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 0.9375rem);
  --text-base: clamp(1rem, 0.925rem + 0.375vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3rem);
  --text-5xl: clamp(3rem, 2.25rem + 3.75vw, 4rem);
  --text-6xl: clamp(3.5rem, 2.5rem + 5vw, 5.5rem);

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows — warm, soft */
  --shadow-sm: 0 1px 3px rgb(0 0 0 / 0.04);
  --shadow-md: 0 4px 12px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 8px 24px rgb(0 0 0 / 0.08);
  --shadow-xl: 0 16px 40px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-theme: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-base: 0;
  --z-above: 10;
  --z-nav: 100;
  --z-modal-backdrop: 200;
  --z-modal: 300;
  --z-fixed: 400;

  /* Container */
  --container-max: 1060px;
  --container-padding: var(--space-lg);
}

/* ==========================================================================
   Theme: Warm Ink (Default) — Terracotta on warm paper
   ========================================================================== */

[data-theme='slate'],
:root {
  --color-primary: #1a1614;
  --color-primary-light: #2d2926;
  --color-primary-dark: #0d0b0a;
  --color-accent: #c05236;
  --color-accent-light: #d4674d;
  --color-accent-dark: #a3422a;

  --color-bg: #f7f3ee;
  --color-bg-alt: #efe9e1;
  --color-surface: #ffffff;
  --color-border: #e0d8ce;

  --color-text: #1a1614;
  --color-text-muted: #5c554d;
  --color-text-light: #8a8078;
  --color-text-inverse: #f7f3ee;

  --color-hero-bg: transparent;
  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #1a1614;
  --color-footer-text: #f0ebe4;
  --color-footer-muted: #9a918a;
}

[data-theme='slate'][data-mode='dark'] {
  --color-bg: #131110;
  --color-bg-alt: #1e1b18;
  --color-surface: #2a2623;
  --color-border: #3d3830;

  --color-text: #f0ebe4;
  --color-text-muted: #a69e96;
  --color-text-light: #776f67;

  --color-accent: #d4674d;
  --color-accent-light: #e87a60;
  --color-accent-dark: #c05236;

  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #0d0b0a;
  --color-footer-text: #e0d8ce;
  --color-footer-muted: #776f67;
}

/* ==========================================================================
   Theme: Ocean — Deep navy with warm coral
   ========================================================================== */

[data-theme='ocean'] {
  --color-primary: #0f2438;
  --color-primary-light: #1a3654;
  --color-primary-dark: #091620;
  --color-accent: #e8634a;
  --color-accent-light: #f07d68;
  --color-accent-dark: #c84d36;

  --color-bg: #f4f6fa;
  --color-bg-alt: #e8ecf2;
  --color-surface: #ffffff;
  --color-border: #d0d8e4;

  --color-text: #0f2438;
  --color-text-muted: #4a5d73;
  --color-text-light: #7889a0;
  --color-text-inverse: #f4f6fa;

  --color-hero-bg: transparent;
  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #0f2438;
  --color-footer-text: #dfe5ed;
  --color-footer-muted: #7889a0;
}

[data-theme='ocean'][data-mode='dark'] {
  --color-bg: #0a1520;
  --color-bg-alt: #142232;
  --color-surface: #1c3350;
  --color-border: #2a4a6a;

  --color-text: #e4eaf2;
  --color-text-muted: #8da0b8;
  --color-text-light: #5a7494;

  --color-accent: #f07d68;
  --color-accent-light: #f8998a;
  --color-accent-dark: #e8634a;

  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #06101a;
  --color-footer-text: #d0d8e4;
  --color-footer-muted: #5a7494;
}

/* ==========================================================================
   Theme: Forest — Earthy green with antique gold
   ========================================================================== */

[data-theme='forest'] {
  --color-primary: #172e22;
  --color-primary-light: #234436;
  --color-primary-dark: #0e1c14;
  --color-accent: #b8922a;
  --color-accent-light: #cca63e;
  --color-accent-dark: #967618;

  --color-bg: #f5f3ee;
  --color-bg-alt: #e9e6dc;
  --color-surface: #ffffff;
  --color-border: #d4cfc4;

  --color-text: #172e22;
  --color-text-muted: #4a5e50;
  --color-text-light: #788a7e;
  --color-text-inverse: #f5f3ee;

  --color-hero-bg: transparent;
  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #172e22;
  --color-footer-text: #dde8e0;
  --color-footer-muted: #788a7e;
}

[data-theme='forest'][data-mode='dark'] {
  --color-bg: #0c1710;
  --color-bg-alt: #17281c;
  --color-surface: #1e3828;
  --color-border: #2e5038;

  --color-text: #e0ece2;
  --color-text-muted: #8aaa92;
  --color-text-light: #5c7c64;

  --color-accent: #cca63e;
  --color-accent-light: #ddb850;
  --color-accent-dark: #b8922a;

  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #081008;
  --color-footer-text: #d4cfc4;
  --color-footer-muted: #5c7c64;
}

/* ==========================================================================
   Theme: Midnight — Deep dark with electric blue
   ========================================================================== */

[data-theme='midnight'] {
  --color-primary: #0a0e1a;
  --color-primary-light: #141a2e;
  --color-primary-dark: #040610;
  --color-accent: #4da8e8;
  --color-accent-light: #70bef0;
  --color-accent-dark: #2e8ed4;

  --color-bg: #0e1220;
  --color-bg-alt: #161c2e;
  --color-surface: #1e2640;
  --color-border: #2e3854;

  --color-text: #e0e4ee;
  --color-text-muted: #8a94ac;
  --color-text-light: #5a6480;
  --color-text-inverse: #0e1220;

  --color-hero-bg: transparent;
  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #060a14;
  --color-footer-text: #d0d4de;
  --color-footer-muted: #5a6480;
}

/* Midnight is dark by default, light mode is the alternate */
[data-theme='midnight'][data-mode='light'] {
  --color-bg: #f2f4f8;
  --color-bg-alt: #e0e4ee;
  --color-surface: #ffffff;
  --color-border: #c0c8d8;

  --color-text: #0e1220;
  --color-text-muted: #3e4a64;
  --color-text-light: #6a7694;

  --color-accent: #2e8ed4;
  --color-accent-light: #4da8e8;
  --color-accent-dark: #1e72b0;

  --color-hero-text: var(--color-text);
  --color-hero-text-muted: var(--color-text-muted);

  --color-footer-bg: #0e1220;
  --color-footer-text: #d0d4de;
  --color-footer-muted: #6a7694;
}

/* ==========================================================================
   Theme Transitions
   ========================================================================== */

html {
  transition:
    background-color var(--transition-theme),
    color var(--transition-theme);
}

body,
.card,
.nav,
.hero,
footer,
.modal {
  transition:
    background-color var(--transition-theme),
    color var(--transition-theme),
    border-color var(--transition-theme);
}