/* ─────────────────────────────────────────────────────────────────────
   llm-watcher — project page
   Concept: 間 (ma). The page is built out of its gaps.
   See SITE_DESIGN.md at the repository root.
   ───────────────────────────────────────────────────────────────────── */

/* ── fonts ─────────────────────────────────────────────────────────── */

@font-face {
  font-family: "Zen Old Mincho";
  src: url("fonts/zenoldmincho-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Zen Old Mincho";
  src: url("fonts/zenoldmincho-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/plexmono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/plexmono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ── tokens ────────────────────────────────────────────────────────── */

:root {
  --paper:       #faf8f5;
  --paper-sunk:  #f2eee7;
  --ink:         #1a1a1a;
  --ink-soft:    #57534a;
  --ink-faint:   #726b60;
  --rule:        #ddd7cc;
  --vermilion:   #b7410e;
  --vermilion-ink: #fdf6ef;

  --pace-ok:   #3f6f43;
  --pace-warn: #8a5d0c;
  --pace-over: #a3301f;

  --grain: 0.035;

  --serif: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho",
           "Noto Serif JP", Georgia, "Times New Roman", serif;
  --mono:  "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Mono",
           "DejaVu Sans Mono", monospace;

  --gutter: clamp(1.25rem, 5vw, 3.5rem);
  --measure: 62ch;
  --column: min(68rem, 100% - var(--gutter) * 2);
  --section-gap: clamp(4rem, 8vh, 6.5rem);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:       #16150f;
    --paper-sunk:  #1e1d16;
    --ink:         #eae6dd;
    --ink-soft:    #a29c8f;
    --ink-faint:   #8b8478;
    --rule:        #33312a;
    --vermilion:   #d95f2b;
    --vermilion-ink: #16150f;
    --pace-ok:   #7fae72;
    --pace-warn: #d0a13c;
    --pace-over: #e07a63;
    --grain: 0.05;
  }
}

:root[data-theme="dark"] {
  --paper:       #16150f;
  --paper-sunk:  #1e1d16;
  --ink:         #eae6dd;
  --ink-soft:    #a29c8f;
  --ink-faint:   #8b8478;
  --rule:        #33312a;
  --vermilion:   #d95f2b;
  --vermilion-ink: #16150f;
  --pace-ok:   #7fae72;
  --pace-warn: #d0a13c;
  --pace-over: #e07a63;
  --grain: 0.05;
}

/* ── base ──────────────────────────────────────────────────────────── */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1rem, 0.97rem + 0.15vw, 1.0625rem);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* washi grain — atmosphere, never texture you can name */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
body > * { position: relative; z-index: 1; }

p { margin: 0 0 1.35em; max-width: var(--measure); }

a { color: var(--vermilion); text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 3px;
  border-radius: 2px;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-sunk);
  padding: 0.1em 0.28em;
  border-radius: 2px;
}

em { font-style: italic; }
strong { font-weight: 700; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 20;
  background: var(--vermilion);
  color: var(--vermilion-ink);
  padding: 0.6rem 1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  text-decoration: none;
  transition: top 160ms var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ── seal ──────────────────────────────────────────────────────────── */

.seal {
  display: inline-grid;
  place-items: center;
  inline-size: 3.25rem;
  block-size: 3.25rem;
  background: var(--vermilion);
  color: var(--vermilion-ink);
  border-radius: 3px;
  flex: none;
  /* carved, not printed: the edge is never perfectly square */
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--vermilion) 82%, #000);
}
.seal__mark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1.05;
  inline-size: 1.9ch;
  text-align: center;
  letter-spacing: -0.02em;
}
.seal--sm { inline-size: 2rem; block-size: 2rem; border-radius: 2px; }
.seal--sm .seal__mark { font-size: 0.6rem; }
.seal--lg { inline-size: 4.5rem; block-size: 4.5rem; }
.seal--lg .seal__mark { font-size: 1.3rem; }

/* ── masthead ──────────────────────────────────────────────────────── */

.masthead {
  width: var(--column);
  margin-inline: auto;
  padding-block: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  margin-inline-end: auto;
}
.brand__name {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.masthead__nav {
  display: flex;
  gap: 1.4rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}
.masthead__nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding-block: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.masthead__nav a:hover { color: var(--ink); border-bottom-color: var(--vermilion); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.3rem 0.75rem 0.3rem 0.55rem;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink-faint); }
.theme-toggle__glyph {
  inline-size: 0.7rem;
  block-size: 0.7rem;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--ink) 50%, transparent 50%);
  box-shadow: inset 0 0 0 1px var(--ink-faint);
}

@media (max-width: 46rem) {
  .masthead__nav { order: 3; width: 100%; gap: 1.1rem; flex-wrap: wrap; }
}

/* ── layout ────────────────────────────────────────────────────────── */

main { display: block; }

.hero, .section {
  width: var(--column);
  margin-inline: auto;
}

.hero { padding-block: clamp(3rem, 9vh, 6rem) clamp(4rem, 10vh, 7rem); }
.section { padding-block: var(--section-gap); }

.rule {
  width: var(--column);
  margin-inline: auto;
  border: 0;
  border-top: 1px solid var(--rule);
  height: 0;
  transform-origin: left center;
}

/* ── hero ──────────────────────────────────────────────────────────── */

.hero__mark {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.hero__eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.hero__title {
  font-size: clamp(2.75rem, 1.6rem + 5.4vw, 5.25rem);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0 0 1.25rem;
}

.hero__lede {
  font-size: clamp(1.15rem, 1rem + 0.7vw, 1.6rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 34ch;
  margin-bottom: 3rem;
}
.hero__lede em { color: var(--ink); font-style: italic; }

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 2rem;
  margin-top: 2rem;
}

.hero__note {
  margin-top: 2.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ── terminal ──────────────────────────────────────────────────────── */

.terminal { margin: 0; }
.terminal__cap {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
}
.terminal__body,
.code-block {
  background: var(--paper-sunk);
  padding: clamp(1rem, 3vw, 1.6rem);
  overflow-x: auto;
  border-left: 2px solid var(--vermilion);
}
.code-block { margin: 1.5rem 0 2rem; }

.terminal pre, .code-block pre { margin: 0; }
.terminal code, .code-block code {
  font-family: var(--mono);
  font-size: clamp(0.72rem, 0.6rem + 0.42vw, 0.86rem);
  line-height: 1.75;
  background: none;
  padding: 0;
  color: var(--ink);
  white-space: pre;
  display: block;
}

.t-dim  { color: var(--ink-faint); }
.t-ok   { color: var(--pace-ok); font-weight: 500; }
.t-warn { color: var(--pace-warn); font-weight: 500; }
.t-over { color: var(--pace-over); font-weight: 500; }
.t-key  { color: var(--vermilion); }
.t-str  { color: var(--pace-ok); }

/* ── command ───────────────────────────────────────────────────────── */

.cmd {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--rule);
  background: var(--paper-sunk);
  padding: 0.55rem 0.55rem 0.55rem 1rem;
  max-width: 100%;
}
.cmd--block { display: flex; width: fit-content; margin-bottom: 2rem; }
.cmd__text {
  font-family: var(--mono);
  font-size: 0.85rem;
  background: none;
  padding: 0;
  white-space: nowrap;
  overflow-x: auto;
}
.cmd__copy {
  flex: none;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 0.32rem 0.7rem;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.cmd__copy:hover { color: var(--vermilion); border-color: var(--vermilion); }
.cmd__copy[data-copied] { color: var(--pace-ok); border-color: var(--pace-ok); }

.link-arrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--vermilion) 40%, transparent);
  padding-bottom: 0.15rem;
}
.link-arrow::after {
  content: " \2192";
  display: inline-block;
  transition: transform 200ms var(--ease);
}
.link-arrow:hover { border-bottom-color: var(--vermilion); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ── section furniture ─────────────────────────────────────────────── */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--vermilion);
  margin: 0 0 1rem;
}

h2 {
  font-size: clamp(1.75rem, 1.3rem + 1.9vw, 2.6rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
}

.sub {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 2.75rem 0 1rem;
}

.lede {
  font-size: clamp(1.05rem, 1rem + 0.35vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 52ch;
  margin-bottom: 3rem;
}

.aside {
  border-left: 1px solid var(--rule);
  padding-left: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin-top: 2.5rem;
}

.muted { color: var(--ink-faint); font-size: 0.85em; }
.cta-line { margin-top: 2.5rem; }

/* ── anatomy ───────────────────────────────────────────────────────── */

.anatomy {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 clamp(1rem, 3vw, 2.5rem);
  border-top: 1px solid var(--rule);
  padding-top: 1.75rem;
}
.anatomy__part { display: flex; flex-direction: column; }
.anatomy__frag {
  font-family: var(--mono);
  font-size: clamp(0.85rem, 0.7rem + 0.55vw, 1.15rem);
  font-weight: 500;
  color: var(--ink);
  margin: 0;
  white-space: nowrap;
}
.anatomy__stem {
  display: block;
  inline-size: 1px;
  block-size: 2.25rem;
  background: var(--vermilion);
  margin: 0.85rem 0 0.85rem 0.15rem;
  transform-origin: top center;
}
.anatomy__label {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  letter-spacing: 0.01em;
}
.anatomy__note {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0;
  max-width: 28ch;
}

@media (max-width: 44rem) {
  .anatomy { grid-template-columns: 1fr; gap: 0; }
  .anatomy__part { padding-block: 1.5rem; }
  .anatomy__part + .anatomy__part { border-top: 1px solid var(--rule); }
  .anatomy__stem { block-size: 1.25rem; margin-block: 0.6rem; }
}

/* ── pace ──────────────────────────────────────────────────────────── */

.formula {
  font-family: var(--mono);
  font-size: clamp(0.78rem, 0.68rem + 0.4vw, 0.95rem);
  color: var(--ink-soft);
  background: var(--paper-sunk);
  border-left: 2px solid var(--vermilion);
  padding: 1rem clamp(1rem, 3vw, 1.5rem);
  max-width: none;
  margin-bottom: 3.5rem;
  overflow-x: auto;
  white-space: nowrap;
}
.formula span { color: var(--vermilion); }

.paces {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2.5rem;
  max-width: 46rem;
}
.pace { display: block; }
.pace__head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.9rem;
}
.pace__value {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 500;
  min-inline-size: 3.5ch;
}
.pace__verdict {
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.pace--ok   .pace__value { color: var(--pace-ok); }
.pace--warn .pace__value { color: var(--pace-warn); }
.pace--over .pace__value { color: var(--pace-over); }

.pace__track {
  position: relative;
  block-size: 0.5rem;
  background: var(--paper-sunk);
  box-shadow: inset 0 0 0 1px var(--rule);
  overflow: visible;
}
.pace__fill {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  inline-size: var(--fill);
  background: currentColor;
}
.pace--ok   .pace__fill { color: var(--pace-ok); }
.pace--warn .pace__fill { color: var(--pace-warn); }
.pace--over .pace__fill { color: var(--pace-over); }

.pace__tick {
  position: absolute;
  inset-inline-start: var(--elapsed);
  inset-block: -0.45rem;
  inline-size: 1px;
  background: var(--ink);
}
.pace__tick::after {
  content: "";
  position: absolute;
  inset-block-start: -0.3rem;
  inset-inline-start: -0.17rem;
  inline-size: 0.35rem;
  block-size: 0.35rem;
  background: var(--ink);
  transform: rotate(45deg);
}

.pace__caption {
  margin: 1.1rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-faint);
}

.legend {
  margin-top: 2.25rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
  max-width: 46rem;
}

/* ── absences ──────────────────────────────────────────────────────── */

.absences {
  list-style: none;
  margin: 0 0 2.5rem;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 40ch;
}
.absences li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--rule);
  font-size: 1.05rem;
}
.absences li:first-child { border-top: 1px solid var(--rule); }
.absences__no {
  font-family: var(--mono);
  color: var(--vermilion);
  flex: none;
}

/* ── tables ────────────────────────────────────────────────────────── */

.table-scroll { overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 0;
  font-size: 0.92rem;
}
.table th, .table td {
  text-align: left;
  padding: 0.85rem 1.25rem 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
.table th {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom-color: var(--ink-faint);
}
.table code { background: none; padding: 0; font-size: 0.82em; }
.table--providers { min-width: 44rem; }
.warn-inline {
  display: block;
  margin-top: 0.35rem;
  color: var(--vermilion);
  font-size: 0.85em;
  font-weight: 400;
}
.warn-inline code { color: inherit; }

/* ── colophon ──────────────────────────────────────────────────────── */

.colophon {
  border-top: 1px solid var(--rule);
  background:
    linear-gradient(to bottom,
      color-mix(in srgb, var(--paper-sunk) 55%, transparent),
      transparent 65%);
}
.colophon__inner {
  width: var(--column);
  margin-inline: auto;
  padding-block: clamp(3.5rem, 9vh, 6rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 3rem clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.colophon__brand { display: flex; gap: 1.5rem; align-items: flex-start; }
.colophon__eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.5rem;
}
.colophon__company {
  display: inline-block;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.15rem;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.colophon__company:hover { color: var(--vermilion); border-bottom-color: var(--vermilion); }
.colophon__site {
  margin: 0.7rem 0 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}
.colophon__site a { text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--vermilion) 35%, transparent); }
.colophon__site a:hover { border-bottom-color: var(--vermilion); }

.colophon__meta {
  font-size: 0.9rem;
  color: var(--ink-soft);
  justify-self: end;
  text-align: right;
  max-width: 34ch;
}
.colophon__meta p { max-width: none; }
.colophon__links { font-family: var(--mono); font-size: 0.78rem; }
.colophon__links a { text-decoration: none; border-bottom: 1px solid transparent; }
.colophon__links a:hover { border-bottom-color: var(--vermilion); }
.colophon__links span { color: var(--ink-faint); margin-inline: 0.5rem; }
.colophon__type {
  margin-top: 1.75rem;
  font-size: 0.78rem;
  color: var(--ink-faint);
  line-height: 1.6;
}

@media (max-width: 50rem) {
  .colophon__inner { grid-template-columns: 1fr; }
  .colophon__meta { justify-self: start; text-align: left; }
}

/* ── motion ────────────────────────────────────────────────────────── */
/* One entrance, above the fold, driven entirely by CSS.
 *
 * An element is hidden ONLY while an animation that reveals it is already
 * running — `both` fill mode means the engine owns both ends, so there is
 * no state where something is hidden waiting on a script. Nothing below
 * the fold is hidden at all.
 *
 * The previous version hid every section and the footer at opacity 0 and
 * relied on an IntersectionObserver to put them back. That strands real
 * content whenever any link in that chain does not fire, which is what
 * happened to the footer. A fade is not worth a page that can eat its own
 * copyright notice. */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: rise 620ms var(--ease) var(--d, 0ms) both;
  }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

@media print {
  body::before { display: none; }
  .masthead__nav, .theme-toggle, .cmd__copy, .skip-link { display: none; }
}