/* ============================================================
   CODEBREAKER - Design tokens & base
   Art direction: "Declassified Archive"
   ink black · archival cream · oxidized brass · microfilm teal
   ============================================================ */

/* ============================================================
   Self-hosted webfonts - no third-party requests at runtime
   ============================================================ */
@font-face {
  font-family: 'Instrument Serif';
  src: url('../fonts/instrument-serif.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Satoshi';
  src: url('../fonts/satoshi-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Satoshi';
  src: url('../fonts/satoshi-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Satoshi';
  src: url('../fonts/satoshi-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/jetbrains-mono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/jetbrains-mono-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/jetbrains-mono-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius & shadow */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --shadow-md: 0 1px 2px rgba(0, 0, 0, 0.28), 0 8px 24px rgba(0, 0, 0, 0.22);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.3), 0 24px 60px rgba(0, 0, 0, 0.35);

  /* Type families */
  --font-display: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --font-body: 'Satoshi', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', monospace;

  --measure: 68ch;
  --nav-h: 4.25rem;
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ---------- Dark (default: this is an archive) ---------- */
:root,
[data-theme='dark'] {
  --color-bg: #0c0b09;
  --color-surface: #131210;
  --color-surface-2: #1a1714;
  --color-surface-offset: #211d18;
  --color-divider: #241f1a;
  --color-border: #302a23;
  --color-border-strong: #453d32;

  --color-text: #ece6d9;
  --color-text-muted: #9c9488;
  --color-text-faint: #666056;
  --color-text-inverse: #14120f;

  --color-primary: #c9902f;
  --color-primary-hover: #dda743;
  --color-primary-soft: rgba(201, 144, 47, 0.13);

  --color-cold: #7ba6ac;
  --color-cold-soft: rgba(123, 166, 172, 0.13);
  --color-rust: #c06534;
  --color-rust-soft: rgba(192, 101, 52, 0.14);
  --color-alarm: #b8474a;
  --color-alarm-soft: rgba(184, 71, 74, 0.14);

  --paper-tint: rgba(236, 230, 217, 0.03);
  --scrim: linear-gradient(
      95deg,
      rgba(9, 8, 7, 0.92) 0%,
      rgba(9, 8, 7, 0.78) 32%,
      rgba(9, 8, 7, 0.42) 68%,
      rgba(9, 8, 7, 0.3) 100%
    ),
    linear-gradient(180deg, rgba(9, 8, 7, 0.45) 0%, rgba(9, 8, 7, 0.5) 45%, rgba(9, 8, 7, 0.95) 100%);
  --scrim-even: linear-gradient(
    180deg,
    rgba(9, 8, 7, 0.78) 0%,
    rgba(9, 8, 7, 0.66) 45%,
    rgba(9, 8, 7, 0.9) 100%
  );
  color-scheme: dark;
}

/* ---------- Light (archival paper) ---------- */
[data-theme='light'] {
  --color-bg: #f3efe4;
  --color-surface: #faf7ef;
  --color-surface-2: #fdfbf6;
  --color-surface-offset: #eae4d5;
  --color-divider: #ded7c6;
  --color-border: #cfc7b3;
  --color-border-strong: #b3a993;

  --color-text: #1a1712;
  --color-text-muted: #6a6357;
  --color-text-faint: #9a9280;
  --color-text-inverse: #faf7ef;

  --color-primary: #8a5c11;
  --color-primary-hover: #6e4a0d;
  --color-primary-soft: rgba(138, 92, 17, 0.1);

  --color-cold: #3d666d;
  --color-cold-soft: rgba(61, 102, 109, 0.1);
  --color-rust: #94441c;
  --color-rust-soft: rgba(148, 68, 28, 0.1);
  --color-alarm: #8f2b2e;
  --color-alarm-soft: rgba(143, 43, 46, 0.1);

  --paper-tint: rgba(26, 23, 18, 0.025);
  --scrim: linear-gradient(
      95deg,
      rgba(16, 13, 9, 0.9) 0%,
      rgba(16, 13, 9, 0.74) 32%,
      rgba(16, 13, 9, 0.4) 68%,
      rgba(16, 13, 9, 0.28) 100%
    ),
    linear-gradient(180deg, rgba(16, 13, 9, 0.4) 0%, rgba(16, 13, 9, 0.46) 45%, rgba(16, 13, 9, 0.86) 100%);
  --scrim-even: linear-gradient(
    180deg,
    rgba(16, 13, 9, 0.76) 0%,
    rgba(16, 13, 9, 0.64) 45%,
    rgba(16, 13, 9, 0.88) 100%
  );
  --shadow-md: 0 1px 2px rgba(60, 50, 32, 0.1), 0 8px 24px rgba(60, 50, 32, 0.08);
  --shadow-lg: 0 2px 4px rgba(60, 50, 32, 0.1), 0 24px 60px rgba(60, 50, 32, 0.12);
  color-scheme: light;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
* {
  margin: 0;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--space-4));
}
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}
img,
video,
svg {
  display: block;
  max-width: 100%;
}
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}
a {
  color: var(--color-primary);
  text-decoration-color: color-mix(in oklab, var(--color-primary) 40%, transparent);
  text-underline-offset: 0.22em;
  transition: color 0.2s var(--ease);
}
a:hover {
  color: var(--color-primary-hover);
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
::selection {
  background: var(--color-primary-soft);
  color: var(--color-text);
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 {
  font-size: var(--text-2xl);
}
h2 {
  font-size: var(--text-xl);
}
h3 {
  font-size: var(--text-lg);
  line-height: 1.2;
}
p {
  text-wrap: pretty;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
}
.eyebrow--cold {
  color: var(--color-cold);
}
.lede {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-text-muted);
  max-width: 46ch;
}
.prose {
  max-width: var(--measure);
}
.prose > * + * {
  margin-top: var(--space-4);
}
.muted {
  color: var(--color-text-muted);
}
.mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

/* ---------- Layout ---------- */
.wrap {
  width: 100%;
  max-width: 78rem;
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}
.wrap--narrow {
  max-width: 56rem;
}
.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
  position: relative;
}
.section--tight {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.rule {
  border: 0;
  border-top: 1px solid var(--color-divider);
}
.stack > * + * {
  margin-top: var(--space-4);
}
.stack-lg > * + * {
  margin-top: var(--space-8);
}
.grid {
  display: grid;
  gap: var(--space-6);
}
@media (min-width: 48rem) {
  .grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(var(--space-8), 6vw, var(--space-20));
    align-items: start;
  }
}
@media (min-width: 64rem) {
  .grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Paper grain overlay - subtle archival texture */
.grain::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.22s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}
.btn--ghost {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.btn--onmedia {
  border-color: rgba(236, 230, 217, 0.4);
  color: #ece6d9;
  backdrop-filter: blur(6px);
}
.btn--onmedia:hover {
  border-color: #ece6d9;
  color: #0c0b09;
  background: #ece6d9;
}
.btn--sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

/* ---------- Cards ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  position: relative;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease),
    background-color 0.25s var(--ease);
}
.card--link:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-2);
  transform: translateY(-2px);
}
.card__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.1em;
}
.card h3 {
  margin-top: var(--space-3);
}
.card p {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28em 0.6em;
  border-radius: var(--radius-sm);
  border: 1px solid;
  white-space: nowrap;
  max-width: 100%;
}
/* long status labels must wrap rather than break their container */
.card > .badge,
.grid--4 .badge {
  white-space: normal;
  text-align: left;
}
.badge::before {
  content: '';
  width: 0.4em;
  height: 0.4em;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}
.badge--documented {
  color: var(--color-primary);
  border-color: color-mix(in oklab, var(--color-primary) 45%, transparent);
  background: var(--color-primary-soft);
}
.badge--principle {
  color: var(--color-cold);
  border-color: color-mix(in oklab, var(--color-cold) 45%, transparent);
  background: var(--color-cold-soft);
}
.badge--unknown {
  color: var(--color-rust);
  border-color: color-mix(in oklab, var(--color-rust) 45%, transparent);
  background: var(--color-rust-soft);
}
.badge--contradicted {
  color: var(--color-alarm);
  border-color: color-mix(in oklab, var(--color-alarm) 45%, transparent);
  background: var(--color-alarm-soft);
}
.badge--plain {
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

/* ---------- Motion ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Utilities ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 200;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}
.skip:focus {
  top: var(--space-3);
}