/* Shared foundation: type, theme tokens, controls and the theme picker. */

@font-face {
  font-family: 'Plex Mono';
  src: url('../assets/fonts/IBMPlexMono-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('../assets/fonts/IBMPlexMono-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('../assets/fonts/IBMPlexMono-Italic.ttf') format('truetype');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Archivo';
  src: url('../assets/fonts/Archivo.ttf') format('truetype');
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}
@font-face {
  font-family: 'Natural Inteligence';
  src: url('../assets/fonts/NaturalInteligence-Regular.woff2') format('woff2'),
    url('../assets/fonts/NaturalInteligence-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Serif';
  src: url('../assets/fonts/InstrumentSerif-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Serif';
  src: url('../assets/fonts/InstrumentSerif-Italic.ttf') format('truetype');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  --bg: #0c0c0c;
  --fg: #d8d4b4;
  --dim: #858270;
  --faint: #52503f;
  --line: #2f2e27;
  --hair: #1f1e1a;
  --raise: #111110;
  --accent: #d8d4b4;
  --mark: #d8785b;
  --cursor: #9f8a57;
  --sel: #d8d4b4;

  --mono: 'Plex Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --grot: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --serif: 'Instrument Serif', 'Times New Roman', serif;
  --brand: 'Natural Inteligence', 'Instrument Serif', 'Times New Roman', serif;

  --ui: 11px;
  --code: 12px;
  --code-lh: 13px;
  --ease: cubic-bezier(0.2, 0.7, 0.1, 1);
  color-scheme: dark;
}
:root[data-mode='light'] {
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font: 400 var(--ui) / 1.5 var(--mono);
  font-feature-settings: 'zero' 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
html {
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}
::selection {
  background: var(--sel);
  color: var(--bg);
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover {
  text-decoration-color: var(--accent);
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  letter-spacing: inherit;
}
:focus {
  outline: none;
}
:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}
img {
  display: block;
  max-width: 100%;
}

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  left: 12px;
  top: -40px;
  z-index: 100;
  padding: 6px 10px;
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
}
.skip-link:focus {
  top: 12px;
}

kbd {
  font: inherit;
  color: var(--dim);
}
kbd::before {
  content: '';
}

/* ── small controls ─────────────────────────────────────────────────── */

.ctl {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 2px;
  color: var(--dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}
.ctl:hover,
.ctl[aria-expanded='true'] {
  color: var(--fg);
}
.ctl b {
  font-weight: 400;
  color: var(--fg);
}
.ctl .sw {
  display: inline-flex;
  gap: 1px;
}
.ctl .sw i {
  width: 4px;
  height: 8px;
  display: block;
}
.sep {
  color: var(--faint);
  user-select: none;
}

/* The brain mark (assets/brand/mark-mask.svg, built from shared/brainmark.js),
   recolored by the theme through a mask. */
.mark {
  --s: 18px;
  width: var(--s);
  height: var(--s);
  display: inline-block;
  flex: none;
  background: var(--fg);
  -webkit-mask: url('../assets/brand/mark-mask.svg') center / contain no-repeat;
  mask: url('../assets/brand/mark-mask.svg') center / contain no-repeat;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font: 400 22px/1 var(--brand);
  letter-spacing: 0;
  color: var(--fg);
  text-decoration: none;
  white-space: nowrap;
}

/* ── theme picker (telescope-style) ─────────────────────────────────── */

.picker {
  width: min(560px, calc(100vw - 24px));
  max-height: none;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--fg);
  font: 400 var(--ui) / 1.5 var(--mono);
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.6);
}
.picker::backdrop {
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  backdrop-filter: blur(2px);
}
.picker-head,
.picker-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  height: 26px;
  padding: 0 10px;
  color: var(--dim);
}
.picker-head {
  border-bottom: 1px solid var(--line);
}
.picker-head b {
  font-weight: 400;
  color: var(--fg);
}
.picker-foot {
  border-top: 1px solid var(--line);
}
.picker-foot kbd {
  color: var(--fg);
}
.picker-search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 10px;
  border-bottom: 1px solid var(--line);
}
.picker-search span {
  color: var(--accent);
}
.picker-search input {
  flex: 1;
  min-width: 0;
  height: 100%;
  border: 0;
  background: none;
  color: var(--fg);
  font: inherit;
  caret-color: var(--cursor);
}
.picker-search input::placeholder {
  color: var(--faint);
}
.picker-search input:focus-visible {
  outline: none;
}
.picker-list {
  --row: 22px;
  list-style: none;
  margin: 0;
  padding: 4px 0;
  height: calc(var(--row) * 8 + 8px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-snap-type: y mandatory;
  scroll-padding: 4px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.picker-list li {
  scroll-snap-align: start;
  display: grid;
  grid-template-columns: 14px 128px 1fr auto;
  align-items: center;
  gap: 8px;
  height: var(--row);
  padding: 0 10px 0 6px;
  cursor: pointer;
  color: var(--dim);
  white-space: nowrap;
}
.picker-list li .nm {
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
}
.picker-list li .nt {
  overflow: hidden;
  text-overflow: ellipsis;
}
.picker-list li .ptr {
  color: var(--accent);
  visibility: hidden;
}
.picker-list li[aria-selected='true'] {
  background: var(--hair);
}
.picker-list li[aria-selected='true'] .ptr {
  visibility: visible;
}
.picker-list li .cur {
  color: var(--faint);
}
.picker-list .sws {
  display: flex;
  gap: 2px;
}
.picker-list .sws i {
  width: 8px;
  height: 8px;
  display: block;
  outline: 1px solid color-mix(in srgb, var(--fg) 8%, transparent);
  outline-offset: -1px;
}
.picker-empty {
  padding: 8px 12px;
  color: var(--faint);
}
.picker-cancel {
  display: none;
  color: var(--fg);
}

@media (pointer: coarse) {
  .picker-list {
    --row: 34px;
  }
  .picker-search input {
    font-size: 16px;
  }
  .picker-cancel {
    display: inline;
  }
  .picker-list li {
    grid-template-columns: 14px 1fr auto;
  }
  .picker-list li .nt {
    display: none;
  }
}
@media (max-width: 520px) {
  .picker-list li {
    grid-template-columns: 14px 1fr auto;
  }
  .picker-list li .nt {
    display: none;
  }
}