@charset "UTF-8";
/* ==========================================================================
   Veltrea Syslog Server — site styles (SF / telemetry console)

   世界: 地上局のテレメトリ・コンソール。
   この製品は遠くの機器から届く流れを受けて読む道具なので、
   管制卓の言語（HUD の枠、読み出し、走査線、生きているログの流れ）で組む。

   演出は入れるが、破ってはいけない線は守る:
   - 実物のスクリーンショットと本文は、必ず読める明度差を保つ
   - prefers-reduced-motion では動きを全部止め、静止した完成形を出す
   - 光らせるのは意味のあるもの（重大度・状態・受信数）だけ
   ========================================================================== */

@font-face {
  font-family: "Chakra Display";
  src: url("assets/fonts/chakra-subset.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+2010-2015, U+2018-201D, U+2022, U+2026,
    U+2032-2033, U+2192, U+25A0, U+25CF, U+2500-257F;
}

:root {
  --void: #04070c;
  --panel: #0a1119;
  --panel-2: #0e1823;
  --line: #1b2b3a;
  --line-hot: #23405a;
  --line-ui: #446c8c; /* 押せるものの輪郭。3:1 以上 */

  --neon: #35f0c0;
  --neon-dim: #1d9a7d;
  --ice: #63cffb;
  --amber: #ffb547;
  --magenta: #ff4d78;
  --violet: #b39dff;

  --fg: #dbe7ef;
  --fg-dim: #93a9b9;
  --fg-faint: #6c8195;

  --page: 78rem;
  --measure: 36em;
  --gutter: clamp(1.15rem, 3.5vw, 2.5rem);

  --display: "Chakra Display", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    "Noto Sans JP", Meiryo, system-ui, sans-serif;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Noto Sans JP",
    Meiryo, system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
    "Noto Sans Mono", monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--fg);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.75;
  font-feature-settings: "palt" 1;
  overflow-x: hidden;
}

/* 走査線と、遠くの地平の光。装飾ではあるが、この世界の骨。 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(
      120% 70% at 50% -10%,
      rgba(53, 240, 192, 0.14),
      transparent 60%
    ),
    radial-gradient(
      90% 50% at 100% 0%,
      rgba(99, 207, 251, 0.1),
      transparent 55%
    );
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.02) 0 1px,
    transparent 1px 3px
  );
  mix-blend-mode: overlay;
}

body > * {
  position: relative;
  z-index: 2;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
  text-decoration-color: var(--line-hot);
}

a:hover {
  text-decoration-color: var(--neon);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.3;
  font-weight: 600;
  text-wrap: balance;
}

h1,
h2 {
  font-family: var(--display);
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2rem, 1.3rem + 3vw, 3.5rem);
  line-height: 1.16;
}

h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem);
}

h3 {
  font-size: 1.06rem;
  font-weight: 700;
}

h4 {
  font-size: 0.98rem;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
  max-width: var(--measure);
}

code,
kbd,
samp {
  font-family: var(--mono);
  font-size: 0.88em;
  font-feature-settings: normal;
  color: var(--ice);
}

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

.wrap {
  width: min(100% - var(--gutter) * 2, var(--page));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--neon);
  color: var(--void);
  padding: 0.55rem 1rem;
  z-index: 99;
  font-weight: 700;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
}

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

.nowrap {
  white-space: nowrap;
}

/* 読み出しの語（HUD のラベル） */
.readout {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

/* --- 柱：管制卓の上端 ---------------------------------------------------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem var(--gutter);
  background: color-mix(in srgb, var(--void) 88%, transparent);
  backdrop-filter: blur(10px) saturate(150%);
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
}

.masthead__mark {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.masthead__mark img {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  box-shadow: 0 0 0 1px var(--line-hot), 0 0 12px rgba(53, 240, 192, 0.35);
}

.masthead nav {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: clamp(0.7rem, 2vw, 1.4rem);
}

.masthead nav a {
  text-decoration: none;
  color: var(--fg-dim);
  padding-block: 0.3rem;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.masthead nav a:hover,
.masthead nav a[aria-current="page"] {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

@media (max-width: 56rem) {
  .masthead nav a.jump {
    display: none;
  }
}

@media (max-width: 30rem) {
  .masthead__name {
    display: none;
  }
}

.lang {
  display: inline-flex;
  border: 1px solid var(--line-ui);
  border-radius: 2px;
  overflow: hidden;
}
.lang a {
  padding: 0.15rem 0.5rem;
  text-decoration: none;
  color: var(--fg-dim);
  white-space: nowrap;
}
.lang a[aria-current="true"] {
  background: var(--neon);
  color: var(--void);
  font-weight: 700;
}

/* --- HUD の枠 ------------------------------------------------------------ */
/* 四隅の角括弧。管制卓の枠そのもので、飾りの罫ではない。 */
.hud {
  position: relative;
  background: linear-gradient(
    160deg,
    var(--panel-2),
    var(--panel) 55%,
    var(--void)
  );
  border: 1px solid var(--line);
}

.hud::before,
.hud::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--neon);
  pointer-events: none;
}

.hud::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.hud::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.hud__bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 12, 18, 0.6);
}

.hud__bar .readout {
  color: var(--fg-dim);
}

.hud__body {
  padding: clamp(0.85rem, 2vw, 1.35rem);
}

/* 状態灯 */
.led {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.led::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 8px var(--neon);
}

/* --- 一面：管制卓 -------------------------------------------------------- */
.console {
  padding-block: clamp(2rem, 5vw, 4rem) clamp(2.5rem, 5vw, 4rem);
}

.console__grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

@media (min-width: 64rem) {
  .console__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

.console h1 em {
  font-style: normal;
  color: var(--neon);
  text-shadow: 0 0 24px rgba(53, 240, 192, 0.55);
}

.console__lede {
  margin-top: 1.1rem;
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  color: var(--fg-dim);
  max-width: 30em;
}

.console__lede b {
  color: var(--fg);
  font-weight: 600;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.62rem 1.3rem;
  font: inherit;
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 1px solid var(--neon);
  border-radius: 2px;
  background: var(--neon);
  color: var(--void);
  box-shadow: 0 0 24px -6px rgba(53, 240, 192, 0.75);
  transition: box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover {
  box-shadow: 0 0 34px -2px rgba(53, 240, 192, 0.9);
  transform: translateY(-1px);
}

.btn--plain {
  background: transparent;
  color: var(--fg);
  border-color: var(--line-ui);
  box-shadow: none;
}

.btn--plain:hover {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: 0 0 20px -8px rgba(53, 240, 192, 0.8);
}

.meta {
  font-size: 0.82rem;
  color: var(--fg-faint);
  line-height: 1.6;
  font-family: var(--mono);
}

/* 読み出しの帯 */
.gauges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 1px;
  margin-top: 2rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.gauge {
  background: var(--panel);
  padding: 0.7rem 0.9rem;
}

.gauge b {
  display: block;
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.gauge span {
  display: block;
  margin-top: 0.2rem;
}

/* --- 生きているログ ------------------------------------------------------ */
.stream {
  font-family: var(--mono);
  font-size: clamp(0.66rem, 0.55rem + 0.35vw, 0.79rem);
  line-height: 1.55;
}

.stream__head,
.stream__row {
  display: grid;
  grid-template-columns: 6.9rem 4.6rem 9.2rem minmax(0, 1fr);
  gap: 0.5rem;
  padding: 0.22rem 0.15rem;
  white-space: nowrap;
}

@media (max-width: 34rem) {
  .stream__head,
  .stream__row {
    grid-template-columns: 5.6rem 7.4rem minmax(0, 1fr);
  }
  .stream__head span:nth-child(2),
  .stream__row span:nth-child(2) {
    display: none;
  }
}

.stream__head {
  color: var(--fg-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0.35rem;
  padding-bottom: 0.4rem;
}

.stream__rows {
  height: clamp(15rem, 34vh, 21rem);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.05rem;
}

.stream__row span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.stream__row .t {
  color: var(--fg-faint);
}
.stream__row .g {
  color: var(--fg-dim);
}
.stream__row .e {
  color: var(--ice);
  font-size: 0.92em;
}
.stream__row .m {
  color: var(--fg);
}

.stream__row.is-ok .s,
.stream__row.is-ok .m {
  color: var(--neon);
}
.stream__row.is-warn .s,
.stream__row.is-warn .m {
  color: var(--amber);
}
.stream__row.is-error .s,
.stream__row.is-error .m {
  color: var(--magenta);
}
.stream__row.is-debug .s,
.stream__row.is-debug .m {
  color: var(--violet);
}

.stream__row.is-new {
  animation: rowin 0.45s var(--ease) both;
}

@keyframes rowin {
  from {
    opacity: 0;
    transform: translateY(6px);
    filter: brightness(2.2);
  }
  to {
    opacity: 1;
    transform: none;
    filter: none;
  }
}

/* --- 章 ------------------------------------------------------------------ */
.section {
  padding-block: clamp(2.75rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
}

.section__head {
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.section__head h2 {
  margin-bottom: 0.55em;
}

.section__lede {
  color: var(--fg-dim);
  max-width: 42em;
}

/* --- 復号の実演 ---------------------------------------------------------- */
.decode {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

@media (min-width: 60rem) {
  .decode {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }
}

.decode__line {
  font-family: var(--mono);
  font-size: clamp(0.72rem, 0.6rem + 0.4vw, 0.88rem);
  line-height: 1.7;
  padding-block: 0.75rem;
  border-bottom: 1px solid var(--line);
  word-break: break-all;
}

.decode__line:last-of-type {
  border-bottom: 0;
}

.decode__line .readout {
  display: block;
  margin-bottom: 0.3rem;
}

.decode__bytes {
  color: var(--fg-faint);
}

.decode__bytes b {
  color: var(--ice);
  font-weight: 400;
}

.decode__bad {
  color: var(--magenta);
}

.decode__good {
  font-family: var(--font);
  font-size: 1rem;
  color: var(--neon);
  font-weight: 600;
  text-shadow: 0 0 18px rgba(53, 240, 192, 0.4);
}

.tagpill {
  display: inline-block;
  margin-inline-start: 0.6rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ice);
  border: 1px solid var(--line-hot);
  border-radius: 2px;
  padding: 0.05em 0.45em;
  text-shadow: none;
  vertical-align: 0.12em;
}

.enc__list {
  margin: 0;
  font-size: 0.92rem;
}

.enc__list dt {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ice);
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.enc__list dt:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.enc__list dd {
  margin: 0.25rem 0 0;
  color: var(--fg-dim);
  max-width: 32em;
}

/* --- 三つの形 ------------------------------------------------------------ */
.units {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 58rem) {
  .units {
    grid-template-columns: 1.15fr 1.15fr 1fr;
  }
}

.unit {
  background: var(--panel);
  padding: clamp(1rem, 2vw, 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.unit h3 {
  font-family: var(--display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.unit__id {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--fg-faint);
  letter-spacing: 0.06em;
  margin-top: -0.35rem;
}

.unit p {
  margin: 0;
  color: var(--fg-dim);
  font-size: 0.94rem;
  max-width: none;
}

.unit dl {
  margin: auto 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.74rem;
  display: grid;
  gap: 0.25rem;
}

.unit dl > div {
  display: flex;
  gap: 0.6rem;
}

.unit dt {
  flex: 0 0 5.2em;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
}

.unit dd {
  margin: 0;
  color: var(--ice);
}

/* --- 図版 ---------------------------------------------------------------- */
.plate {
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
}

.plate:last-child {
  margin-bottom: 0;
}

.plate__frame {
  position: relative;
  padding: 0.55rem;
}

.plate__frame a {
  display: block;
}

.plate__frame img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.plate__caption {
  margin-top: 0.75rem;
  font-size: 0.86rem;
  color: var(--fg-dim);
  max-width: 58em;
}

.plate__caption b {
  display: block;
  font-family: var(--display);
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--fg);
  font-weight: 600;
}

.plate__full {
  display: block;
  width: fit-content;
  margin-top: 0.4rem;
  font-size: 0.82rem;
  color: var(--fg-faint);
}

.plate__full:hover {
  color: var(--neon);
}

@media (min-width: 54rem) {
  .plate--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.5rem;
    align-items: center;
  }
  .plate--split .plate__caption {
    margin-top: 0;
  }
}

/* --- 表 ------------------------------------------------------------------ */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-block: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 34rem;
}

th,
td {
  text-align: start;
  padding: 0.7rem 1.1rem 0.7rem 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

thead th {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 400;
  color: var(--fg-faint);
  white-space: nowrap;
}

tbody td {
  color: var(--fg-dim);
}

tbody td:first-child {
  color: var(--fg);
  font-weight: 600;
}

tbody tr:last-child td {
  border-bottom: 0;
}

/* --- 手順 ---------------------------------------------------------------- */
.steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.steps > li {
  counter-increment: step;
  display: grid;
  gap: 0.2rem 1rem;
  grid-template-columns: 2.5rem minmax(0, 1fr);
}

.steps > li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--display);
  font-size: 1.15rem;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
}

.steps h3 {
  margin-bottom: 0.35rem;
}

/* --- 端末 ---------------------------------------------------------------- */
pre {
  margin: 0 0 1.1rem;
  padding: 0.9rem 1.05rem;
  background: #060b11;
  color: #cfe3ee;
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  tab-size: 2;
}

pre code {
  font-size: inherit;
  color: inherit;
}

.cmd {
  position: relative;
}

.cmd button {
  position: absolute;
  top: 0.4rem;
  inset-inline-end: 0.4rem;
  font: inherit;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.55rem;
  color: var(--fg-dim);
  background: #0b141c;
  border: 1px solid var(--line-ui);
  border-radius: 2px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}

.cmd:hover button,
.cmd button:focus-visible {
  opacity: 1;
}

.cmd button:hover {
  color: var(--neon);
  border-color: var(--neon);
}

/* --- 警告 ---------------------------------------------------------------- */
.notes {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 52rem;
}

.note {
  background: var(--panel);
  padding: clamp(0.9rem, 2vw, 1.3rem);
}

.note h3 {
  margin-bottom: 0.3rem;
  color: var(--amber);
}

.note p {
  margin-bottom: 0;
  color: var(--fg-dim);
  font-size: 0.94rem;
}

.caution {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.9rem 1.1rem;
  margin-block: 1.35rem;
}

.caution h3,
.caution h4 {
  margin-bottom: 0.3rem;
  color: var(--amber);
}

.caution p:last-child {
  margin-bottom: 0;
}

/* --- 奥付 ---------------------------------------------------------------- */
.colophon {
  border-top: 1px solid var(--line);
  padding-block: clamp(2rem, 4vw, 3rem);
  font-size: 0.86rem;
  color: var(--fg-dim);
}

.colophon__grid {
  display: grid;
  gap: 1.5rem clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

.colophon h2 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 0.6rem;
}

.colophon ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.colophon p {
  max-width: none;
}

.colophon a:hover {
  color: var(--neon);
}

.colophon__end {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.5rem;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--fg-faint);
}

/* ==========================================================================
   マニュアル面 — 同じ卓のまま、読むための明度に落とす
   ========================================================================== */
.doc__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-block: clamp(1.75rem, 4vw, 2.75rem) clamp(2.5rem, 5vw, 4rem);
}

@media (min-width: 62rem) {
  .doc__layout {
    grid-template-columns: 15rem minmax(0, 1fr);
  }
}

.toc {
  font-size: 0.86rem;
  line-height: 1.6;
}

@media (min-width: 62rem) {
  .toc {
    position: sticky;
    top: 4.5rem;
    align-self: start;
    max-height: calc(100vh - 6.5rem);
    overflow-y: auto;
    padding-inline-end: 1rem;
    border-inline-end: 1px solid var(--line);
  }
}

.toc h2 {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 0.7rem;
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
}

.toc > ol > li > a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.8em;
  color: var(--fg-faint);
  margin-inline-end: 0.5rem;
}

.toc a {
  display: block;
  padding: 0.22rem 0;
  color: var(--fg-dim);
  text-decoration: none;
}

.toc a:hover,
.toc a.is-current {
  color: var(--neon);
}

.toc ol ol {
  margin: 0.05rem 0 0.45rem 1.6rem;
}

.toc ol ol a {
  font-size: 0.94em;
  padding: 0.1rem 0;
}

.doc__body {
  max-width: 50rem;
}

.doc__body h1 {
  font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.6rem);
  margin-bottom: 0.5em;
}

.doc__body > p:first-of-type {
  color: var(--fg-dim);
  font-size: 1.05rem;
  max-width: 36em;
}

.doc__body section {
  padding-top: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 1px solid var(--line);
}

.doc__body h2 {
  margin-bottom: 0.7em;
  color: var(--neon);
}

.doc__body h3 {
  margin: 2em 0 0.5em;
}

.doc__body h4 {
  margin: 1.6em 0 0.4em;
}

.doc__body p,
.doc__body li {
  max-width: var(--measure);
}

.doc__body ul,
.doc__body ol {
  margin: 0 0 1.1em;
  padding-inline-start: 1.3em;
}

.doc__body li {
  margin-bottom: 0.35em;
  color: var(--fg-dim);
}

.doc__body p {
  color: var(--fg-dim);
}

.doc__body b,
.doc__body strong {
  color: var(--fg);
}

.doc__body a {
  color: var(--ice);
}

.doc__body a:hover {
  color: var(--neon);
}

.doc__body .table-scroll {
  margin-bottom: 1.35rem;
}

.doc__body .plate {
  max-width: none;
}

.lead-in {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.5rem;
}

.lead-in p {
  margin-bottom: 0;
  font-size: 0.92rem;
  max-width: none;
}

/* --- 起動の演出（一度だけ） ---------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .boot > * {
    animation: boot 0.7s var(--ease) both;
  }
  .boot > *:nth-child(1) {
    animation-delay: 0.05s;
  }
  .boot > *:nth-child(2) {
    animation-delay: 0.16s;
  }
  .boot > *:nth-child(3) {
    animation-delay: 0.27s;
  }
  .boot > *:nth-child(4) {
    animation-delay: 0.38s;
  }

  @keyframes boot {
    from {
      opacity: 0;
      transform: translateY(10px);
      filter: blur(6px);
    }
    to {
      opacity: 1;
      transform: none;
      filter: none;
    }
  }

  /* 走査線がゆっくり降りる。1 本だけ。 */
  .console::after {
    content: "";
    position: absolute;
    inset-inline: 0;
    height: 2px;
    background: linear-gradient(
      to right,
      transparent,
      rgba(53, 240, 192, 0.5),
      transparent
    );
    animation: sweep 7s linear infinite;
    pointer-events: none;
  }

  @keyframes sweep {
    from {
      transform: translateY(0);
      opacity: 0;
    }
    12% {
      opacity: 1;
    }
    88% {
      opacity: 1;
    }
    to {
      transform: translateY(var(--sweep, 42rem));
      opacity: 0;
    }
  }
}

.console {
  position: relative;
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  body::after {
    display: none;
  }
  * {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  body {
    background: #fff;
    color: #000;
  }
  body::before,
  body::after,
  .masthead,
  .toc,
  .cmd button {
    display: none;
  }
  pre,
  .hud,
  .note,
  .caution {
    background: #f2f2f0;
    color: #000;
  }
}