/* Living Brain app — the design-token sheet and the handful of components
 * the three pages need. Same conventions as the sibling venture sites: a flat
 * stylesheet, oklch() tokens, no build step, dark by default with light
 * following the system unless the person has chosen.
 *
 * Every length here is fluid (clamp, %, min/max) or auto: nothing has a fixed
 * pixel width, so the layout cannot overflow a 360 px viewport. Anything that
 * could be wider than its column — long slugs, URLs, tokens — sets
 * `overflow-wrap: anywhere`.

   tokens
   ---------------------------------------------------------------- */

:root {
  color-scheme: dark light;

  --bg: oklch(0.16 0.014 215);
  --bg-raised: oklch(0.2 0.016 215);
  --bg-sunken: oklch(0.13 0.012 215);
  --line: oklch(0.32 0.018 215);
  --ink: oklch(0.95 0.008 200);
  --ink2: oklch(0.8 0.014 205);
  --ink3: oklch(0.68 0.016 205);
  --accent: oklch(0.86 0.16 162);
  --accent-ink: oklch(0.16 0.03 162);
  --warn: oklch(0.85 0.13 78);
  --bad: oklch(0.76 0.16 22);

  --step-0: clamp(0.95rem, 0.9rem + 0.2vw, 1.05rem);
  --step-1: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  --step-2: clamp(1.4rem, 1.2rem + 1vw, 1.9rem);
  --step-3: clamp(1.75rem, 1.4rem + 2vw, 2.75rem);

  --space-1: clamp(0.35rem, 0.3rem + 0.25vw, 0.5rem);
  --space-2: clamp(0.6rem, 0.5rem + 0.4vw, 0.9rem);
  --space-3: clamp(0.9rem, 0.7rem + 0.8vw, 1.4rem);
  --space-4: clamp(1.4rem, 1rem + 1.6vw, 2.4rem);
  --space-5: clamp(2.2rem, 1.5rem + 3vw, 4rem);

  --radius: 10px;
  --measure: 68ch;
}

/* Light follows the system only while the person has not chosen. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: oklch(0.985 0.004 200);
    --bg-raised: oklch(1 0 0);
    --bg-sunken: oklch(0.955 0.006 205);
    --line: oklch(0.86 0.012 210);
    --ink: oklch(0.22 0.02 220);
    --ink2: oklch(0.38 0.02 218);
    --ink3: oklch(0.5 0.018 216);
    --accent: oklch(0.52 0.13 162);
    --accent-ink: oklch(0.99 0.005 160);
    --warn: oklch(0.5 0.12 66);
    --bad: oklch(0.5 0.17 25);
  }
}

/* An explicit choice beats the system, in both directions. */
:root[data-theme="light"] {
  --bg: oklch(0.985 0.004 200);
  --bg-raised: oklch(1 0 0);
  --bg-sunken: oklch(0.955 0.006 205);
  --line: oklch(0.86 0.012 210);
  --ink: oklch(0.22 0.02 220);
  --ink2: oklch(0.38 0.02 218);
  --ink3: oklch(0.5 0.018 216);
  --accent: oklch(0.52 0.13 162);
  --accent-ink: oklch(0.99 0.005 160);
  --warn: oklch(0.5 0.12 66);
  --bad: oklch(0.5 0.17 25);
}

:root[data-theme="dark"] {
  --bg: oklch(0.16 0.014 215);
  --bg-raised: oklch(0.2 0.016 215);
  --bg-sunken: oklch(0.13 0.012 215);
  --line: oklch(0.32 0.018 215);
  --ink: oklch(0.95 0.008 200);
  --ink2: oklch(0.8 0.014 205);
  --ink3: oklch(0.68 0.016 205);
  --accent: oklch(0.86 0.16 162);
  --accent-ink: oklch(0.16 0.03 162);
  --warn: oklch(0.85 0.13 78);
  --bad: oklch(0.76 0.16 22);
}

/*   base
   ---------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font: var(--step-0) / 1.6 system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", sans-serif;
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  line-height: 1.2;
  text-wrap: balance;
  margin: 0 0 var(--space-2);
}

h1 {
  font-size: var(--step-3);
}
h2 {
  font-size: var(--step-2);
}
h3 {
  font-size: var(--step-1);
}

p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

code,
kbd,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

code {
  background: var(--bg-sunken);
  border-radius: 5px;
  padding: 0.1em 0.35em;
}

pre {
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-2);
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--space-4) 0;
}

/* A visible focus ring everywhere, never removed. */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: no-preference) {
  :where(a, button, input, select, textarea) {
    transition: color 120ms ease, background-color 120ms ease,
      border-color 120ms ease;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/*   layout
   ---------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding: var(--space-3) var(--space-2) var(--space-5);
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  position: static;
  display: inline-block;
  margin: var(--space-2);
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  border-bottom: 1px solid var(--line);
  padding-block: var(--space-2);
}

.topbar .brand {
  font-weight: 650;
  letter-spacing: -0.01em;
  margin-inline-end: auto;
  text-decoration: none;
  color: var(--ink);
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-3);
}

.muted {
  color: var(--ink2);
  font-size: 0.92em;
}

.tiny {
  color: var(--ink3);
  font-size: 0.85em;
}

.pill {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1em 0.6em;
  font-size: 0.78rem;
  color: var(--ink2);
  white-space: nowrap;
}

.pill[data-state="disabled"] {
  opacity: 0.85;
}

.pill[data-state="off"] {
  color: var(--ink3);
}

.pill[data-state="on"] {
  color: var(--accent);
  border-color: var(--accent);
}

.pill[data-state="warn"] {
  color: var(--warn);
  border-color: var(--warn);
}

/*   controls
   ---------------------------------------------------------------- */

button,
.btn {
  font: inherit;
  font-weight: 550;
  color: var(--ink);
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

button:hover:not(:disabled),
.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

button:disabled,
[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.6;
}

button[data-variant="primary"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

button[data-variant="primary"]:hover:not(:disabled) {
  color: var(--accent-ink);
  filter: brightness(1.08);
}

label {
  display: block;
  font-weight: 550;
  margin-bottom: var(--space-1);
}

input,
select,
textarea {
  font: inherit;
  color: var(--ink);
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-2);
  width: 100%;
  max-width: 100%;
}

textarea {
  min-height: 12rem;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.5;
}

input[type="checkbox"] {
  width: auto;
  accent-color: var(--accent);
}

fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: 0 0 var(--space-3);
  min-width: 0;
}

legend {
  padding-inline: var(--space-1);
  font-weight: 600;
}

/*   notices
   ---------------------------------------------------------------- */

.notice {
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  margin-block: var(--space-2);
  background: var(--bg-sunken);
}

.notice[data-tone="ok"] {
  border-left-color: var(--accent);
}

.notice[data-tone="warn"] {
  border-left-color: var(--warn);
}

.notice[data-tone="bad"] {
  border-left-color: var(--bad);
}

.notice:empty {
  display: none;
}

/*   sign-in
   ---------------------------------------------------------------- */

.signin {
  max-width: 34rem;
  margin-inline: auto;
}

.methods {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
}

.methods > li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-3);
}

.methods > li > .btn {
  width: 100%;
  margin-top: auto;
}

/*   settings
   ---------------------------------------------------------------- */

.settings {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  align-items: start;
}

.settings section {
  min-width: 0;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-2);
}

.row > label {
  flex: 1 1 12rem;
  margin-bottom: 0;
}

.row > select,
.row > input {
  flex: 2 1 12rem;
  width: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92em;
}

.table caption {
  text-align: left;
  color: var(--ink2);
  padding-bottom: var(--space-2);
}

.table th,
.table td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: var(--space-1) var(--space-2) var(--space-1) 0;
  vertical-align: top;
}

/*   wiki
   ---------------------------------------------------------------- */

.wiki-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-3);
}

.wiki-toolbar .status {
  margin-inline-start: auto;
  color: var(--ink2);
  font-size: 0.9em;
}

.editor {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  align-items: start;
}

.editor > * {
  min-width: 0;
}

.prose {
  max-width: var(--measure);
}

.prose h1 {
  font-size: var(--step-3);
}
.prose h2 {
  font-size: var(--step-2);
  margin-top: var(--space-4);
}
.prose h3 {
  font-size: var(--step-1);
  margin-top: var(--space-3);
}

.prose ul,
.prose ol {
  padding-inline-start: 1.4em;
  margin: 0 0 var(--space-3);
}

.prose blockquote {
  margin: 0 0 var(--space-3);
  padding-inline-start: var(--space-2);
  border-inline-start: 3px solid var(--line);
  color: var(--ink2);
}

.aside-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  align-items: start;
}

.aside-grid > * {
  min-width: 0;
}

.backlinks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.citations {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.citations li {
  border-inline-start: 2px solid var(--line);
  padding-inline-start: var(--space-2);
}

.citations .quote {
  display: block;
  color: var(--ink2);
  font-size: 0.92em;
}

@media (max-width: 30rem) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }
  .topbar nav {
    justify-content: space-between;
  }
}

@media print {
  .topbar,
  .wiki-toolbar,
  .skip {
    display: none;
  }
}