/* Hallmark · macrostructure: Long Document (live instrument panels inside an editorial scroll) · tone: editorial-technical
 * theme: custom (vibe: "lab notebook on warm paper, red pencil for surprise" · paper oklch(96% 0.012 80) · accent oklch(55% 0.17 35) vermilion
 * display Newsreader · body Inter · data JetBrains Mono) · axes: light / roman-serif / warm
 * pre-emit critique: P5 H5 E4 S5 R4 V5 */
:root {
  --color-paper: oklch(96% 0.012 80);
  --color-paper-2: oklch(93% 0.016 80);
  --color-ink: oklch(22% 0.02 60);
  --color-ink-2: oklch(42% 0.02 60);
  --color-muted: oklch(58% 0.02 60);
  --color-line: oklch(84% 0.015 75);
  --color-accent: oklch(55% 0.17 35);
  --color-accent-soft: oklch(90% 0.06 40);
  --color-heat-1: oklch(88% 0.09 70);
  --color-heat-2: oklch(72% 0.17 40);
  --color-heat-3: oklch(52% 0.19 30);
  --color-live: oklch(62% 0.15 150);
  --color-focus: oklch(55% 0.17 35);
  --font-display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 28px; --space-xl: 48px; --space-2xl: 88px;
  --text-sm: 13px; --text-md: 16px; --text-lg: 19px; --text-xl: 26px; --text-display: clamp(56px, 11vw, 136px);
  --measure: 62ch;
  --rule: 1px solid var(--color-line);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 140ms; --dur-med: 320ms;
  --gutter: clamp(16px, 5vw, 72px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-paper: oklch(17% 0.012 70); --color-paper-2: oklch(21% 0.014 70); --color-ink: oklch(93% 0.012 80); --color-ink-2: oklch(74% 0.015 80);
    --color-muted: oklch(60% 0.015 80); --color-line: oklch(32% 0.015 70); --color-accent: oklch(72% 0.15 40); --color-accent-soft: oklch(32% 0.06 40);
    --color-heat-1: oklch(36% 0.08 70); --color-heat-2: oklch(50% 0.15 40); --color-heat-3: oklch(62% 0.19 30);
  }
}
:root[data-theme="dark"] {
  --color-paper: oklch(17% 0.012 70); --color-paper-2: oklch(21% 0.014 70); --color-ink: oklch(93% 0.012 80); --color-ink-2: oklch(74% 0.015 80);
  --color-muted: oklch(60% 0.015 80); --color-line: oklch(32% 0.015 70); --color-accent: oklch(72% 0.15 40); --color-accent-soft: oklch(32% 0.06 40);
  --color-heat-1: oklch(36% 0.08 70); --color-heat-2: oklch(50% 0.15 40); --color-heat-3: oklch(62% 0.19 30);
}
* { box-sizing: border-box; }
html, body { margin: 0; overflow-x: clip; }
body { background: var(--color-paper); color: var(--color-ink); font-family: var(--font-body); font-size: var(--text-md); line-height: 1.55; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, dl, dd, ol { margin: 0; }
button, input { font: inherit; color: inherit; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.mono { font-family: var(--font-mono); }

.hero { padding: var(--space-xl) var(--gutter) var(--space-lg); border-bottom: var(--rule); }
.eyebrow { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); letter-spacing: 0.02em; }
.live { display: inline-flex; align-items: center; gap: 7px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-ink-2); }
.live i { width: 8px; height: 8px; border-radius: 50%; background: var(--color-muted); }
.live.on i { background: var(--color-live); animation: pulse 2.4s var(--ease-out) infinite; }
.live.off i { background: var(--color-accent); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 oklch(62% 0.15 150 / 0.5); } 70% { box-shadow: 0 0 0 8px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
h1 { font-family: var(--font-display); font-weight: 300; font-size: var(--text-display); line-height: 0.92; letter-spacing: -0.025em; margin: var(--space-md) 0 var(--space-lg); overflow-wrap: anywhere; min-width: 0; }
.dek { max-width: var(--measure); font-family: var(--font-display); font-size: clamp(19px, 2.2vw, 24px); line-height: 1.4; color: var(--color-ink-2); }
.dek time { color: var(--color-ink); font-variant-numeric: tabular-nums; }
.numbers { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--space-md) var(--space-lg); margin-top: var(--space-xl); padding-top: var(--space-md); border-top: var(--rule); }
.numbers dt { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.numbers dd { font-family: var(--font-display); font-size: clamp(34px, 4.6vw, 54px); line-height: 1.05; font-weight: 300; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.numbers dd.sub { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); margin-top: 2px; }

main { display: flex; flex-direction: column; }
section { padding: var(--space-2xl) var(--gutter); border-bottom: var(--rule); }
.section-head { max-width: var(--measure); margin-bottom: var(--space-lg); }
h2 { font-family: var(--font-display); font-weight: 400; font-size: clamp(30px, 4vw, 44px); line-height: 1.05; letter-spacing: -0.015em; margin-bottom: var(--space-sm); overflow-wrap: anywhere; min-width: 0; }
.section-head p { color: var(--color-ink-2); }
.caption { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); margin-top: var(--space-sm); }
.key { display: inline-block; padding: 0 6px; border-radius: 3px; font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-ink); }
.k0 { background: var(--color-paper-2); } .k1 { background: var(--color-heat-1); } .k2 { background: var(--color-heat-2); }

/* the live page it reads */
.page { position: relative; max-width: 78ch; min-height: 11lh; padding: var(--space-lg); background: var(--color-paper-2); border: var(--rule); border-radius: 4px; font-family: var(--font-mono); font-size: 15px; line-height: 1.75; color: var(--color-ink); white-space: pre-wrap; overflow-wrap: anywhere; }
.page .placeholder { color: var(--color-muted); }
.page span.t { border-radius: 2px; transition: background var(--dur-med) var(--ease-out); padding: 1px 0; }
.page .cursor { display: inline-block; width: 0.55em; height: 1.05em; vertical-align: -0.15em; background: var(--color-accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* chart */
.chart { margin: 0; width: 100%; }
.chart svg { display: block; width: 100%; height: auto; font-family: var(--font-mono); font-size: 12px; }
.chart .grid { stroke: var(--color-line); stroke-width: 1; }
.chart .train { fill: none; stroke: var(--color-ink); stroke-width: 1.4; stroke-linejoin: round; }
.chart .val { fill: var(--color-accent); }
.chart .lbl { fill: var(--color-muted); }
.chart .ms { stroke: var(--color-accent); stroke-width: 1; stroke-dasharray: 2 3; }
.chart .msl { fill: var(--color-accent); }

/* diary */
.diary ol { list-style: none; padding: 0; display: grid; gap: var(--space-lg); }
.diary li { display: grid; grid-template-columns: minmax(0, 220px) minmax(0, 1fr); gap: var(--space-md) var(--space-lg); padding-top: var(--space-lg); border-top: var(--rule); animation: rise var(--dur-med) var(--ease-out) both; }
.diary .age { font-family: var(--font-display); font-size: var(--text-xl); line-height: 1.1; }
.diary .age small { display: block; margin-top: var(--space-xs); font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); }
.diary .samples { display: grid; gap: var(--space-md); }
.diary .sample { font-family: var(--font-mono); font-size: 14px; line-height: 1.65; white-space: pre-wrap; overflow-wrap: anywhere; }
.diary .sample b { font-weight: 500; color: var(--color-accent); }
.diary .sample .q { color: var(--color-muted); }
.diary .empty { color: var(--color-muted); font-style: italic; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { transform: none; } }

/* talk */
form { display: flex; gap: var(--space-sm); max-width: 78ch; }
input { flex: 1; min-width: 0; padding: 12px 14px; background: var(--color-paper-2); border: var(--rule); border-radius: 4px; font-family: var(--font-mono); font-size: 15px; }
input::placeholder { color: var(--color-muted); }
input:focus { border-color: var(--color-ink-2); }
button[type=submit] { padding: 12px 18px; border: 1px solid var(--color-ink); background: var(--color-ink); color: var(--color-paper); border-radius: 4px; font-weight: 500; white-space: nowrap; cursor: pointer; transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out); }
button[type=submit]:hover { opacity: 0.88; }
button[type=submit]:active { transform: translateY(1px); }
button[type=submit]:disabled { opacity: 0.5; cursor: default; }
.answer { max-width: 78ch; margin-top: var(--space-lg); padding: var(--space-lg); border-left: 3px solid var(--color-accent); background: var(--color-paper-2); animation: rise var(--dur-med) var(--ease-out) both; }
.answer .mono { font-size: 15px; line-height: 1.7; white-space: pre-wrap; overflow-wrap: anywhere; }
.answer .mono b { font-weight: 500; color: var(--color-accent); }
.answer .err { color: var(--color-accent); }

/* machine */
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: var(--space-lg); }
.card { display: grid; gap: var(--space-sm); padding: var(--space-lg); border: var(--rule); border-radius: 4px; background: var(--color-paper-2); }
.card div { display: grid; grid-template-columns: minmax(0, 150px) minmax(0, 1fr); gap: var(--space-md); align-items: baseline; }
.card dt { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.card dd { font-variant-numeric: tabular-nums; }

footer { padding: var(--space-xl) var(--gutter) var(--space-2xl); color: var(--color-muted); font-size: var(--text-sm); max-width: var(--measure); }
.offline { position: sticky; top: 0; z-index: 2; padding: 10px var(--gutter); background: var(--color-accent); color: var(--color-paper); font-size: var(--text-sm); }

@media (prefers-reduced-motion: reduce) { .live.on i, .page .cursor { animation: none; } .diary li, .answer { animation: none; } }
@media (max-width: 640px) {
  :root { --space-2xl: 56px; --space-xl: 36px; }
  .diary li { grid-template-columns: minmax(0, 1fr); }
  form { flex-direction: column; }
  .card div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .page { padding: var(--space-md); font-size: 14px; }
}