/* ============================================================
   DESIGN SYSTEM — The Monolithic Blueprint
   Color tokens, typography, surfaces, spacing
   ============================================================ */

/* Fonts loaded via HTML link tags for non-blocking loading */

/* ---------- Color Tokens ---------- */
:root {
  /* Primary */
  --color-primary: #415aab;
  --color-primary-container: #aebeff;
  --color-primary-dim: #344e9e;
  --color-primary-fixed: #aebeff;
  --color-on-primary: #faf8ff;
  --color-on-primary-container: #193686;

  /* Secondary */
  --color-secondary: #4c5b9c;
  --color-secondary-container: #dde1ff;
  --color-secondary-dim: #404f8f;
  --color-on-secondary: #faf8ff;
  --color-on-secondary-container: #3e4d8e;

  /* Tertiary */
  --color-tertiary: #006b5f;
  --color-tertiary-container: #91eedc;
  --color-tertiary-dim: #005e53;
  --color-on-tertiary: #e3fff7;
  --color-on-tertiary-container: #00594e;

  /* Error */
  --color-error: #ac3149;
  --color-error-container: #f76a80;
  --color-error-dim: #770326;
  --color-on-error: #fff7f7;
  --color-on-error-container: #68001f;

  /* Background */
  --color-background: #f7f9fb;
  --color-on-background: #2d3337;

  /* Surface Hierarchy */
  --color-surface: #f7f9fb;
  --color-surface-dim: #d3dbdf;
  --color-surface-bright: #f7f9fb;
  --color-surface-container: #eaeef1;
  --color-surface-container-high: #e3e9ec;
  --color-surface-container-highest: #dde3e7;
  --color-surface-container-low: #f1f4f6;
  --color-surface-container-lowest: #ffffff;
  --color-surface-variant: #dde3e7;
  --color-surface-tint: #415aab;
  --color-on-surface: #2d3337;
  --color-on-surface-variant: #596063;

  /* Outline */
  --color-outline: #757c7f;
  --color-outline-variant: #acb3b7;

  /* Inverse */
  --color-inverse-surface: #0b0f10;
  --color-inverse-on-surface: #9a9d9f;
  --color-inverse-primary: #8fa7fe;

  /* ---------- Typography Tokens ---------- */
  --font-display: 'Manrope', system-ui, sans-serif;
  --font-headline: 'Manrope', system-ui, sans-serif;
  --font-body: 'Manrope', system-ui, sans-serif;
  --font-label: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Type Scale */
  --text-display-lg: 3.5rem;
  --text-display-md: 2.75rem;
  --text-headline-lg: 2rem;
  --text-headline-md: 1.75rem;
  --text-headline-sm: 1.5rem;
  --text-title-lg: 1.375rem;
  --text-title-md: 1.125rem;
  --text-title-sm: 0.875rem;
  --text-body-lg: 1.125rem;
  --text-body-md: 1rem;
  --text-body-sm: 0.875rem;
  --text-label-lg: 0.875rem;
  --text-label-md: 0.75rem;
  --text-label-sm: 0.6875rem;

  /* Line Heights */
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* Letter Spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;

  /* ---------- Spacing ---------- */
  --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-section: 5rem;

  /* ---------- Shape ---------- */
  --radius-xs: 0.25rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-xlg: 2rem;

  /* ---------- Shadows (Grey-Ambient) ---------- */
  --shadow-sm: 0 2px 8px -2px rgba(45, 51, 55, 0.06);
  --shadow-md: 0 8px 24px -4px rgba(45, 51, 55, 0.06);
  --shadow-lg: 0 20px 40px -8px rgba(45, 51, 55, 0.06);
  --shadow-ambient: 0 0 60px -5px rgba(45, 51, 55, 0.04);

  /* ---------- Transitions ---------- */
  --ease-out: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-premium: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-premium: 800ms;
  --duration-ambient: 3000ms;

  /* ---------- Z-Index ---------- */
  --z-base: 0;
  --z-elevated: 10;
  --z-nav: 100;
  --z-modal: 1000;
}

/* ---------- Dark Mode Overrides ---------- */
[data-theme="dark"] {
  /* Primary */
  --color-primary: #8fa7fe;
  --color-primary-container: #233b90;
  --color-primary-dim: #7b95ee;
  --color-primary-fixed: #aebeff;
  --color-on-primary: #0f1f6a;
  --color-on-primary-container: #dde4ff;

  /* Secondary */
  --color-secondary: #bcc3ff;
  --color-secondary-container: #323c85;
  --color-secondary-dim: #aab1f0;
  --color-on-secondary: #242e76;
  --color-on-secondary-container: #dee1ff;

  /* Tertiary */
  --color-tertiary: #76d8c8;
  --color-tertiary-container: #004d44;
  --color-tertiary-dim: #65c9b9;
  --color-on-tertiary: #003731;
  --color-on-tertiary-container: #c0f0e4;

  /* Error */
  --color-error: #ffb3bc;
  --color-error-container: #820028;
  --color-error-dim: #ee9ea9;
  --color-on-error: #53001a;
  --color-on-error-container: #ffd9de;

  /* Background */
  --color-background: #0d1117;
  --color-on-background: #e5e9ed;

  /* Surface Hierarchy */
  --color-surface: #0d1117;
  --color-surface-dim: #0b0f14;
  --color-surface-bright: #1c2128;
  --color-surface-container: #161b22;
  --color-surface-container-high: #1c2128;
  --color-surface-container-highest: #212830;
  --color-surface-container-low: #10161c;
  --color-surface-container-lowest: #090d12;
  --color-surface-variant: #21272e;
  --color-surface-tint: #8fa7fe;
  --color-on-surface: #e5e9ed;
  --color-on-surface-variant: #9ba4b0;

  /* Outline */
  --color-outline: #6a737d;
  --color-outline-variant: #30363d;

  /* Inverse */
  --color-inverse-surface: #e5e9ed;
  --color-inverse-on-surface: #2d3337;
  --color-inverse-primary: #415aab;

  /* Shadows (darker for dark mode) */
  --shadow-sm: 0 2px 8px -2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px -8px rgba(0, 0, 0, 0.5);
  --shadow-ambient: 0 0 60px -5px rgba(0, 0, 0, 0.3);
}

/* ---------- Smooth Theme Transitions ---------- */
*,
*::before,
*::after {
  transition:
    background-color var(--duration-normal) var(--ease-in-out),
    border-color var(--duration-normal) var(--ease-in-out),
    color var(--duration-normal) var(--ease-in-out),
    box-shadow var(--duration-normal) var(--ease-in-out);
}

/* Exclude elements where transition would look wrong */
.reveal-init,
.char-reveal__inner,
.ambient-blob,
.kinetic-grid,
canvas,
iframe,
img,
svg,
video,
.page-enter {
  transition: none;
}


/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  line-height: var(--leading-normal);
  color: var(--color-on-surface);
  background-color: var(--color-background);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-tertiary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- Typography Classes ---------- */
.display-lg {
  font-family: var(--font-display);
  font-size: var(--text-display-lg);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-on-surface);
}

.display-md {
  font-family: var(--font-display);
  font-size: var(--text-display-md);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-on-surface);
}

.headline-lg {
  font-family: var(--font-headline);
  font-size: var(--text-headline-lg);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--color-on-surface);
}

.headline-md {
  font-family: var(--font-headline);
  font-size: var(--text-headline-md);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--color-on-surface);
}

.headline-sm {
  font-family: var(--font-headline);
  font-size: var(--text-headline-sm);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--color-on-surface);
}

.title-lg {
  font-family: var(--font-headline);
  font-size: var(--text-title-lg);
  font-weight: 500;
  line-height: var(--leading-snug);
}

.title-md {
  font-family: var(--font-headline);
  font-size: var(--text-title-md);
  font-weight: 500;
  line-height: var(--leading-snug);
}

.title-sm {
  font-family: var(--font-headline);
  font-size: var(--text-title-sm);
  font-weight: 500;
  line-height: var(--leading-snug);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.body-lg {
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  line-height: var(--leading-relaxed);
}

.body-md {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  line-height: var(--leading-normal);
}

.body-sm {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  line-height: var(--leading-normal);
}

.label-lg {
  font-family: var(--font-label);
  font-size: var(--text-label-lg);
  font-weight: 500;
  line-height: 1;
  letter-spacing: var(--tracking-wide);
}

.label-md {
  font-family: var(--font-label);
  font-size: var(--text-label-md);
  font-weight: 500;
  line-height: 1;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.label-sm {
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  font-weight: 500;
  line-height: 1;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-label-md);
  letter-spacing: var(--tracking-wide);
}

/* ---------- Surface Classes ---------- */
.surface-dim {
  background-color: var(--color-surface-dim);
}

.surface-base {
  background-color: var(--color-surface);
}

.surface-container {
  background-color: var(--color-surface-container);
}

.surface-container-low {
  background-color: var(--color-surface-container-low);
}

.surface-container-high {
  background-color: var(--color-surface-container-high);
}

.surface-container-highest {
  background-color: var(--color-surface-container-highest);
}

.surface-bright {
  background-color: var(--color-surface-bright);
}

.surface-variant {
  background-color: var(--color-surface-variant);
}

/* ---------- Text Color Helpers ---------- */
.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-secondary);
}

.text-tertiary {
  color: var(--color-tertiary);
}

.text-on-surface {
  color: var(--color-on-surface);
}

.text-on-surface-variant {
  color: var(--color-on-surface-variant);
}

.text-error {
  color: var(--color-error);
}

/* ---------- Selection ---------- */
::selection {
  background-color: var(--color-primary-container);
  color: var(--color-on-surface);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface-container-low);
}

::-webkit-scrollbar-thumb {
  background: var(--color-outline-variant);
  border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-outline);
}