/* ============================================================
   VIVID DESIGN SYSTEM
   Single import for all Vivid brand tokens, base styles,
   and component classes.

   Usage:
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Mona+Sans:wght@400;500;600;700&display=swap" rel="stylesheet">
     <link rel="stylesheet" href="/vivid.css">
   ============================================================ */

/* ========================================
   FONTS
   ======================================== */

/* Satoshi Variable (self-hosted) */
@font-face {
  font-family: 'Satoshi';
  src: url('./assets/fonts/Satoshi-Variable.woff2') format('woff2'),
       url('./assets/fonts/Satoshi-Variable.woff') format('woff');
  font-weight: 300 900;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: 'Satoshi';
  src: url('./assets/fonts/Satoshi-VariableItalic.woff2') format('woff2'),
       url('./assets/fonts/Satoshi-VariableItalic.woff') format('woff');
  font-weight: 300 900;
  font-display: swap;
  font-style: italic;
}

/* ========================================
   DESIGN TOKENS
   Every rule below references only these.
   ======================================== */
:root {
  /* Gray Scale (purple-tinted neutrals) */
  --gray-50: #fffeff;
  --gray-175: #f2ebf4;
  --gray-300: #e5dbe8;
  --gray-425: #bcb1bf;
  --gray-575: #8b828e;
  --gray-700: #59515b;
  --gray-825: #211d23;
  --gray-950: #050305;

  /* Semantic Colors */
  --color-primary: #521262;
  --color-primary-gradient: linear-gradient(180deg, rgb(127, 44, 163) 12%, rgb(75, 27, 95) 81%);
  --color-accent: #ff5252;
  --color-surface: var(--gray-950);
  --color-surface-raised: var(--gray-825);
  --color-surface-elevated: var(--gray-700);
  --color-surface-input: var(--gray-700);
  --color-on-primary: var(--gray-50);
  --color-on-primary-muted: var(--gray-425);
  --color-on-primary-light: var(--gray-175);
  --color-on-surface: var(--gray-50);
  --color-on-surface-secondary: var(--gray-425);
  --color-on-surface-muted: var(--gray-575);
  --color-border: var(--gray-700);
  --color-border-subtle: var(--gray-825);
  --color-highlight: #ffffa9;
  --color-error: #ff6b6b;

  /* Glass Layers */
  --glass-1: rgba(255, 255, 255, 0.03);
  --glass-2: rgba(255, 255, 255, 0.05);
  --glass-3: rgba(255, 255, 255, 0.08);
  --glass-4: rgba(255, 255, 255, 0.10);

  /* Typography */
  --font-headline: 'Mona Sans', system-ui, sans-serif;
  --font-body: 'Satoshi', system-ui, sans-serif;
  --font-ui: 'Satoshi', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --h1-size: 50px;
  --h1-tracking: -2.1px;
  --h1-leading: 1.2em;
  --h2-size: 36px;
  --h2-tracking: -2px;
  --h2-leading: 1.2em;
  --h3-size: 24px;
  --h3-tracking: -1px;
  --h3-leading: 1.3em;
  --body-size: 18px;
  --body-leading: 1.5em;
  --body-small-size: 16px;
  --body-small-leading: 1.4em;
  --label-size: 14px;
  --label-leading: 1.4em;
  --caption-size: 12px;
  --micro-size: 11px;
  --tag-size: 10px;

  /* Radii */
  --radius-sm: 8px;
  --radius-card: 20px;
  --radius-pill: 64px;

  /* Spacing (8px base) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;

  /* Layout */
  --max-width: 1200px;

  /* Proportions — Wersin's 12 Orthogons */
  --ratio-square: 1 / 1;
  --ratio-diagon: 1 / 1.414;
  --ratio-hecton: 1 / 1.732;
  --ratio-doppelquadrat: 1 / 2;
  --ratio-hemiolion: 1 / 1.5;
  --ratio-auron: 1 / 1.618;
  --ratio-hemidiagon: 1 / 1.118;
  --ratio-penton: 1 / 1.272;
  --ratio-trion: 1 / 1.155;
  --ratio-quadriagon: 1 / 1.207;
  --ratio-biauron: 1 / 1.236;
  --ratio-bipenton: 1 / 1.058;
}

/* ========================================
   BASE RESET & DEFAULTS
   ======================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: var(--body-leading);
  color: var(--color-on-surface);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1 {
  font-family: var(--font-headline);
  font-size: var(--h1-size);
  line-height: var(--h1-leading);
  letter-spacing: var(--h1-tracking);
  font-weight: 700;
}

h2 {
  font-family: var(--font-headline);
  font-size: var(--h2-size);
  line-height: var(--h2-leading);
  letter-spacing: var(--h2-tracking);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

h3 {
  font-family: var(--font-headline);
  font-size: var(--h3-size);
  line-height: var(--h3-leading);
  letter-spacing: var(--h3-tracking);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

p { margin-bottom: var(--space-sm); }
a { color: inherit; }
img { max-width: 100%; }

/* ========================================
   LAYOUT
   ======================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section { padding: var(--space-2xl) 0; }
.section--purple { background: var(--color-primary); color: var(--color-on-primary); }
.section--gradient { background: var(--color-primary-gradient); color: var(--color-on-primary); }
.section--raised { background: var(--color-surface-raised); }
.section--elevated { background: var(--color-surface-elevated); }

.grid {
  display: grid;
  gap: var(--space-md);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-raised);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}
.nav__logo {
  color: var(--color-on-surface);
  height: var(--space-md);
  width: auto;
}
.nav__links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  flex-wrap: wrap;
}
.nav__links a {
  font-family: var(--font-ui);
  font-size: var(--label-size);
  font-weight: 600;
  color: var(--color-on-surface-secondary);
  text-decoration: none;
  transition: color 200ms ease;
}
.nav__links a:hover { color: var(--color-on-surface); }

/* ========================================
   HERO
   ======================================== */
.hero {
  background: var(--color-primary-gradient);
  padding: var(--space-2xl) 0;
  text-align: center;
  color: var(--color-on-primary);
  height: calc(100vw / 2);
  max-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero h1 { margin-bottom: var(--space-sm); }
.hero__subtitle {
  color: var(--color-on-primary-muted);
  font-size: var(--body-size);
  margin-bottom: var(--space-lg);
  max-width: calc(var(--space-xl) * 8.75);
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  font-size: var(--body-small-size);
  font-weight: 600;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 200ms ease;
  line-height: 1;
}
.btn:hover { opacity: 0.9; }
.btn:active { transform: scale(0.98); }

.btn--cta {
  background: var(--color-accent);
  color: var(--color-surface);
}
.btn--glass {
  background: var(--glass-2);
  color: var(--color-on-surface);
}
.btn--glass:hover { background: var(--glass-3); }
.btn--ghost {
  background: transparent;
  color: var(--color-on-surface);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover {
  background: var(--glass-1);
  opacity: 1;
}
.btn--secondary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.btn--glow {
  box-shadow: 0 0 20px rgba(255, 82, 82, 0.4), 0 0 60px rgba(255, 82, 82, 0.2);
}
.btn--tall {
  height: 64px;
  padding: var(--space-sm) var(--space-lg);
}

/* ========================================
   CARDS
   ======================================== */
.card {
  background: var(--color-surface-raised);
  border-radius: var(--radius-card);
  border: 1px solid var(--glass-4);
  overflow: hidden;
  aspect-ratio: var(--ratio-diagon);
  display: flex;
  flex-direction: column;
}
.card__body {
  flex: 1;
  padding: var(--space-lg);
}
.card__header {
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-md) var(--space-lg);
}

/* ========================================
   INPUTS
   ======================================== */
.input {
  font-family: var(--font-ui);
  font-size: var(--body-small-size);
  font-weight: 600;
  padding: var(--space-sm);
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-surface-input);
  color: var(--color-on-surface);
  width: 100%;
  transition: box-shadow 200ms ease;
  outline: none;
}
.input:focus {
  box-shadow: inset 0 0 0 2px var(--color-primary);
}
.input--error {
  box-shadow: inset 0 0 0 2px var(--color-error);
}
.input-label {
  font-family: var(--font-ui);
  font-size: var(--label-size);
  font-weight: 600;
  color: var(--color-on-surface-secondary);
  display: block;
  margin-bottom: var(--space-xs);
}
.input-error-text {
  font-family: var(--font-ui);
  font-size: var(--caption-size);
  color: var(--color-error);
  margin-top: var(--space-xs);
}
textarea.input { resize: vertical; min-height: calc(var(--space-lg) * 3); }

/* ========================================
   TAGS / CHIPS
   ======================================== */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--tag-size);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-on-surface-secondary);
  background: var(--glass-3);
  border-radius: var(--radius-sm);
  padding: calc(var(--space-xs) / 2) var(--space-xs);
}

/* ========================================
   GLASS SURFACES
   ======================================== */
.glass-1 { background: var(--glass-1); }
.glass-2 { background: var(--glass-2); }
.glass-3 { background: var(--glass-3); }
.glass-4 { background: var(--glass-4); }

/* ========================================
   TYPOGRAPHY UTILITIES
   ======================================== */
.text-h1 {
  font-family: var(--font-headline);
  font-size: var(--h1-size);
  line-height: var(--h1-leading);
  letter-spacing: var(--h1-tracking);
  font-weight: 700;
}
.text-h2 {
  font-family: var(--font-headline);
  font-size: var(--h2-size);
  line-height: var(--h2-leading);
  letter-spacing: var(--h2-tracking);
  font-weight: 700;
}
.text-h3 {
  font-family: var(--font-headline);
  font-size: var(--h3-size);
  line-height: var(--h3-leading);
  letter-spacing: var(--h3-tracking);
  font-weight: 700;
}
.text-body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: var(--body-leading);
}
.text-body-small {
  font-family: var(--font-body);
  font-size: var(--body-small-size);
  line-height: var(--body-small-leading);
}
.text-label {
  font-family: var(--font-ui);
  font-size: var(--label-size);
  line-height: var(--label-leading);
  font-weight: 500;
}
.text-caption {
  font-family: var(--font-ui);
  font-size: var(--caption-size);
}
.text-micro {
  font-family: var(--font-ui);
  font-size: var(--micro-size);
}

/* ========================================
   COLOR UTILITIES
   ======================================== */
.text-primary { color: var(--color-on-surface); }
.text-secondary { color: var(--color-on-surface-secondary); }
.text-muted { color: var(--color-on-surface-muted); }
.text-accent { color: var(--color-accent); }
.text-highlight { color: var(--color-highlight); }
.text-error { color: var(--color-error); }

.bg-surface { background: var(--color-surface); }
.bg-raised { background: var(--color-surface-raised); }
.bg-elevated { background: var(--color-surface-elevated); }
.bg-primary { background: var(--color-primary); color: var(--color-on-primary); }
.bg-gradient { background: var(--color-primary-gradient); color: var(--color-on-primary); }
.bg-accent { background: var(--color-accent); }

/* ========================================
   IMAGE BACKGROUND OVERLAY
   ======================================== */
.bg-image-overlay {
  background:
    linear-gradient(
      180deg,
      rgba(82, 18, 98, 0.85) 0%,
      rgba(5, 3, 5, 0.90) 100%
    ),
    var(--bg-image) center / cover no-repeat;
  color: var(--color-on-primary);
}

/* ========================================
   DIVIDERS
   ======================================== */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
}
.divider--subtle {
  border-top-color: var(--color-border-subtle);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--color-surface);
  color: var(--color-on-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
}
.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.footer__text {
  font-family: var(--font-ui);
  font-size: var(--label-size);
  color: var(--color-on-surface-muted);
}

/* ========================================
   MODAL
   ======================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal.is-open {
  opacity: 1;
  pointer-events: auto;
}
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 3, 5, 0.85);
}
.modal__content {
  position: relative;
  background: #ffffff;
  color: var(--gray-950);
  border: 1px solid var(--glass-4);
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-lg);
  transform: translateY(16px);
  transition: transform 0.3s ease;
}
.modal.is-open .modal__content {
  transform: translateY(0);
}
.modal__close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  z-index: 1;
  background: var(--gray-100, #f0f0f0);
  color: var(--gray-950);
}
.modal__close:hover {
  background: var(--gray-200, #e0e0e0);
}
.modal__loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) 0;
  gap: var(--space-sm);
}
.modal__spinner {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid var(--glass-4);
  border-top-color: var(--color-accent);
  animation: modal-spin 0.7s linear infinite;
}
@keyframes modal-spin {
  to { transform: rotate(360deg); }
}

/* ========================================
   CODE BLOCK
   ======================================== */
.code-block {
  background: var(--gray-950);
  color: var(--gray-425);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: calc(var(--caption-size) + 1px);
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  h1 { font-size: var(--h2-size); letter-spacing: var(--h2-tracking); }
  h2 { font-size: calc(var(--h3-size) + 4px); }
  .section { padding: var(--space-xl) 0; }
  .container { padding: 0 var(--space-md); }
  .nav__links { display: none; }
  .nav .btn--ghost { display: none; }
  .hero { padding: var(--space-xl) 0; }
  .grid--2, .grid--3, .grid--4 {
    grid-template-columns: 1fr;
  }
  .modal__content {
    max-width: 100%;
    margin: var(--space-xs);
    padding: var(--space-md);
  }
}

@media print {
  .nav { position: static; }
  body, .section, .section--raised, .section--elevated,
  .section--purple, .section--gradient {
    background: white !important;
    color: #141414 !important;
  }
}