:root {
  --blc-paper: #f1f4f0;
  --blc-paper-2: #e7ece8;
  --blc-ink: #151a18;
  --blc-muted: #66716c;
  --blc-rule: rgba(24, 39, 34, .2);
  --blc-jade: #367d72;
  --blc-vermilion: #c53b32;
  --blc-black: #070a09;
  --blc-white: #fafbf8;
  --blc-shadow: 0 28px 70px rgba(20, 27, 24, .09);
}

html[data-day="0"] {
  --blc-paper: #090c0b;
  --blc-paper-2: #111614;
  --blc-ink: #e7ece8;
  --blc-muted: #929f99;
  --blc-rule: rgba(226, 237, 231, .18);
  --blc-jade: #6ab0a3;
  --blc-vermilion: #f05b4f;
  --blc-black: #020303;
  --blc-white: #161b19;
  --blc-shadow: 0 28px 70px rgba(0, 0, 0, .32);
}

html { scroll-behavior: smooth; }
body.blc-lineage-page {
  margin: 0;
  color: var(--blc-ink);
  background:
    linear-gradient(90deg, transparent 0 4.8%, rgba(54,125,114,.04) 4.8% 4.9%, transparent 4.9%),
    var(--blc-paper);
  font-family: "Noto Serif CJK TC", "Noto Serif TC", "Yu Mincho", "Hiragino Mincho ProN", serif;
}

.blc-shell {
  width: min(1500px, calc(100% - 64px));
  margin: 0 auto;
  padding: 150px 0 96px;
}

.blc-mono,
.blc-kicker,
.blc-section-no,
.blc-meta,
.blc-index,
.blc-chip,
.blc-source,
.blc-copy,
.blc-verdict-label,
.blc-axis th,
.blc-axis td:first-child {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.blc-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr);
  min-height: 650px;
  border-top: 1px solid var(--blc-rule);
  border-bottom: 1px solid var(--blc-rule);
}

.blc-hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 64px 64px 56px 0;
  border-right: 1px solid var(--blc-rule);
}

.blc-kicker,
.blc-section-no {
  margin: 0;
  color: var(--blc-jade);
  font-size: 11px;
  font-weight: 700;
}

.blc-hero h1 {
  margin: 54px 0 24px;
  max-width: 760px;
  font-size: clamp(64px, 8vw, 132px);
  font-weight: 500;
  line-height: .86;
  letter-spacing: -.075em;
}

.blc-hero h1 em {
  color: var(--blc-vermilion);
  font-style: normal;
}

.blc-hero__dek {
  max-width: 690px;
  margin: 0;
  color: var(--blc-muted);
  font-size: clamp(17px, 1.5vw, 23px);
  line-height: 2;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.blc-hero__thesis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 64px;
  border-top: 1px solid var(--blc-rule);
}

.blc-hero__thesis div { padding: 18px 18px 0 0; }
.blc-hero__thesis div + div { padding-left: 18px; border-left: 1px solid var(--blc-rule); }
.blc-hero__thesis b { display: block; color: var(--blc-vermilion); font: 700 11px/1.4 "IBM Plex Mono", monospace; letter-spacing: .12em; }
.blc-hero__thesis span { display: block; margin-top: 10px; font-size: 15px; line-height: 1.65; }

.blc-hero__plate {
  position: relative;
  overflow: hidden;
  min-height: 650px;
  background: var(--blc-black);
}

.blc-hero__plate img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 70% center;
  filter: saturate(.92) contrast(1.04);
}

.blc-hero__plate::after {
  content: "BLC / 01 → PLACE / 01";
  position: absolute;
  right: 22px;
  bottom: 24px;
  color: #fff;
  font: 600 10px/1.4 "IBM Plex Mono", monospace;
  letter-spacing: .2em;
  writing-mode: vertical-rl;
}

.blc-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 56px;
  margin-top: 80px;
}

.blc-index {
  position: sticky;
  top: 98px;
  align-self: start;
  border-top: 1px solid var(--blc-rule);
  font-size: 10px;
}

.blc-index a {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  padding: 15px 0;
  color: var(--blc-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--blc-rule);
}

.blc-index a:hover,
.blc-index a:focus-visible { color: var(--blc-vermilion); }

.blc-content { min-width: 0; }
.blc-section { padding: 0 0 96px; scroll-margin-top: 110px; }
.blc-section + .blc-section { padding-top: 76px; border-top: 1px solid var(--blc-rule); }
.blc-section__head { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 26px; margin-bottom: 38px; }
.blc-section__head h2 { margin: 0; max-width: 900px; font-size: clamp(34px, 4vw, 66px); font-weight: 500; line-height: 1.12; letter-spacing: -.045em; }
.blc-section__head p:not(.blc-section-no) { margin: 16px 0 0; color: var(--blc-muted); font-size: 16px; line-height: 1.9; }

.blc-anchor-map {
  display: grid;
  grid-template-columns: minmax(220px, .8fr) minmax(220px, .8fr) minmax(320px, 1.4fr);
  gap: 1px;
  background: var(--blc-rule);
  border: 1px solid var(--blc-rule);
}

.blc-anchor-map article { padding: 20px; background: var(--blc-paper); }
.blc-anchor-map img { width: 100%; aspect-ratio: 1.35; object-fit: cover; object-position: top; display: block; background: #fff; }
.blc-anchor-map h3 { margin: 18px 0 8px; font-size: 22px; font-weight: 500; }
.blc-anchor-map p { margin: 0; color: var(--blc-muted); font-size: 14px; line-height: 1.7; }
.blc-anchor-map__route { display: flex; flex-direction: column; justify-content: center; }
.blc-anchor-map__route ol { position: relative; display: grid; gap: 22px; margin: 22px 0 0; padding: 0; list-style: none; }
.blc-anchor-map__route ol::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 1px; background: var(--blc-vermilion); }
.blc-anchor-map__route li { position: relative; padding-left: 34px; font-size: 14px; line-height: 1.6; }
.blc-anchor-map__route li::before { content: ""; position: absolute; left: 3px; top: .55em; width: 9px; height: 9px; background: var(--blc-paper); border: 1px solid var(--blc-vermilion); border-radius: 50%; }
.blc-anchor-map__route li:last-child::before { background: var(--blc-vermilion); }

.blc-four-up {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--blc-rule);
  border: 1px solid var(--blc-rule);
}

.blc-four-up figure { min-width: 0; margin: 0; background: var(--blc-paper); }
.blc-four-up img { width: 100%; aspect-ratio: .82; display: block; object-fit: cover; object-position: center; }
.blc-four-up figure:nth-child(2) img,
.blc-four-up figure:nth-child(4) img { aspect-ratio: 1.35; }
.blc-four-up figcaption { padding: 16px; }
.blc-four-up b { display: block; font-size: 16px; font-weight: 600; }
.blc-four-up span { display: block; margin-top: 6px; color: var(--blc-muted); font: 10px/1.6 "IBM Plex Mono", monospace; letter-spacing: .08em; overflow-wrap: anywhere; }

.blc-axis-wrap { overflow-x: auto; border: 1px solid var(--blc-rule); }
.blc-axis { width: 100%; min-width: 980px; border-collapse: collapse; background: var(--blc-paper); }
.blc-axis th,
.blc-axis td { padding: 18px; vertical-align: top; text-align: left; border-right: 1px solid var(--blc-rule); border-bottom: 1px solid var(--blc-rule); }
.blc-axis th:last-child,
.blc-axis td:last-child { border-right: 0; }
.blc-axis tr:last-child td { border-bottom: 0; }
.blc-axis th { color: var(--blc-jade); font-size: 10px; font-weight: 700; }
.blc-axis td { font-size: 14px; line-height: 1.7; }
.blc-axis td:first-child { width: 128px; color: var(--blc-muted); font-size: 10px; font-weight: 700; }
.blc-axis .is-new { background: color-mix(in srgb, var(--blc-vermilion) 7%, transparent); }

.blc-case {
  display: grid;
  grid-template-columns: minmax(290px, .78fr) minmax(0, 1.22fr);
  gap: 40px;
  padding: 42px 0 76px;
  scroll-margin-top: 108px;
}
.blc-case + .blc-case { border-top: 1px solid var(--blc-rule); }
.blc-case__visual { position: sticky; top: 98px; align-self: start; }
.blc-case__visual img { width: 100%; max-height: 720px; object-fit: contain; display: block; background: #fff; box-shadow: var(--blc-shadow); }
.blc-case__visual figcaption { display: flex; justify-content: space-between; gap: 16px; margin-top: 14px; color: var(--blc-muted); font: 10px/1.5 "IBM Plex Mono", monospace; letter-spacing: .08em; }
.blc-case__body h3 { margin: 0; font-size: clamp(31px, 3.2vw, 52px); font-weight: 500; letter-spacing: -.035em; }
.blc-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 22px; }
.blc-chip { padding: 6px 9px; color: var(--blc-jade); font-size: 9px; border: 1px solid var(--blc-rule); }
.blc-chip.is-red { color: var(--blc-vermilion); border-color: color-mix(in srgb, var(--blc-vermilion) 45%, transparent); }
.blc-case__summary { margin: 0; color: var(--blc-muted); font-size: 16px; line-height: 1.9; }
.blc-section__head p,
.blc-anchor-map p,
.blc-case__summary,
.blc-verdict li,
.blc-forks p { overflow-wrap: anywhere; word-break: break-word; }

.blc-source {
  margin-top: 24px;
  padding: 16px 0;
  color: var(--blc-muted);
  font-size: 9px;
  line-height: 1.8;
  border-top: 1px solid var(--blc-rule);
  border-bottom: 1px solid var(--blc-rule);
  overflow-wrap: anywhere;
}

.blc-prompt { margin-top: 26px; border: 1px solid var(--blc-rule); background: var(--blc-paper-2); }
.blc-prompt > summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 20px; cursor: pointer; list-style: none; font-size: 15px; }
.blc-prompt > summary::-webkit-details-marker { display: none; }
.blc-prompt > summary::after { content: "＋"; color: var(--blc-vermilion); font: 20px/1 serif; }
.blc-prompt[open] > summary::after { content: "−"; }
.blc-prompt__grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--blc-rule); }
.blc-prompt__pane { min-width: 0; padding: 20px; }
.blc-prompt__pane + .blc-prompt__pane { border-left: 1px solid var(--blc-rule); }
.blc-prompt__bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.blc-prompt__bar b { color: var(--blc-jade); font: 700 9px/1.5 "IBM Plex Mono", monospace; letter-spacing: .16em; }
.blc-copy { padding: 5px 8px; color: var(--blc-muted); background: transparent; border: 1px solid var(--blc-rule); font-size: 8px; cursor: pointer; }
.blc-copy:hover,
.blc-copy:focus-visible { color: var(--blc-vermilion); border-color: var(--blc-vermilion); }
.blc-prompt pre { margin: 0; color: var(--blc-ink); font: 12px/1.78 "IBM Plex Mono", "Noto Sans Mono CJK TC", monospace; white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word; }
.blc-prompt__translation pre { font-family: "Noto Serif CJK TC", "Noto Serif TC", "Yu Mincho", serif; font-size: 14px; line-height: 1.9; }

.blc-verdict {
  display: grid;
  grid-template-columns: minmax(200px, .42fr) minmax(0, 1fr);
  gap: 1px;
  background: var(--blc-rule);
  border: 1px solid var(--blc-rule);
}
.blc-verdict > div { padding: 30px; background: var(--blc-paper); }
.blc-verdict-label { color: var(--blc-vermilion); font-size: 10px; font-weight: 700; }
.blc-verdict h3 { margin: 24px 0 0; font-size: 38px; font-weight: 500; line-height: 1.22; letter-spacing: -.035em; }
.blc-verdict ol { margin: 0; padding-left: 1.4em; }
.blc-verdict li { padding: 12px 0; font-size: 16px; line-height: 1.8; border-bottom: 1px solid var(--blc-rule); }
.blc-verdict li:last-child { border-bottom: 0; }

.blc-forks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 36px; background: var(--blc-rule); border: 1px solid var(--blc-rule); }
.blc-forks article { min-height: 260px; padding: 28px; background: var(--blc-paper); }
.blc-forks article:first-child { box-shadow: inset 0 3px var(--blc-vermilion); }
.blc-forks article:nth-child(2) { box-shadow: inset 0 3px var(--blc-jade); }
.blc-forks h3 { margin: 34px 0 14px; font: 500 28px/1.2 "Noto Serif CJK TC", serif; }
.blc-forks p { margin: 0; color: var(--blc-muted); font-size: 14px; line-height: 1.8; }
.blc-forks small { color: var(--blc-jade); font: 9px/1.5 "IBM Plex Mono", monospace; letter-spacing: .12em; }

.blc-footer { display: flex; justify-content: space-between; gap: 20px; padding: 26px 0 0; color: var(--blc-muted); font: 9px/1.6 "IBM Plex Mono", monospace; letter-spacing: .12em; border-top: 1px solid var(--blc-rule); }
.blc-footer a { color: var(--blc-jade); text-decoration: none; }

@media (max-width: 1120px) {
  .blc-shell { width: min(100% - 42px, 1100px); }
  .blc-hero { grid-template-columns: 1fr .68fr; min-height: 560px; }
  .blc-hero__copy { padding: 52px 42px 48px 0; }
  .blc-hero__plate { min-height: 560px; }
  .blc-layout { grid-template-columns: 170px minmax(0, 1fr); gap: 34px; }
  .blc-four-up { grid-template-columns: 1fr 1fr; }
  .blc-case { grid-template-columns: minmax(250px, .7fr) minmax(0, 1.3fr); gap: 28px; }
}

@media (max-width: 820px) {
  .blc-shell { width: calc(100% - 32px); padding-top: 108px; }
  .blc-hero { grid-template-columns: 1fr; }
  .blc-hero__copy { padding: 42px 0; border-right: 0; }
  .blc-hero__plate { min-height: 420px; border-top: 1px solid var(--blc-rule); }
  .blc-layout { display: block; margin-top: 48px; }
  .blc-index { position: sticky; z-index: 5; top: 64px; display: flex; width: 100%; max-width: 100%; overflow-x: auto; margin: 0 0 52px; padding: 0; background: color-mix(in srgb, var(--blc-paper) 92%, transparent); backdrop-filter: blur(14px); }
  .blc-index a { min-width: max-content; grid-template-columns: auto auto; padding: 13px 18px 13px 0; margin-right: 18px; border-bottom: 0; }
  .blc-section__head { grid-template-columns: 1fr; }
  .blc-anchor-map { grid-template-columns: 1fr 1fr; }
  .blc-anchor-map__route { grid-column: 1 / -1; }
  .blc-case { grid-template-columns: 1fr; }
  .blc-case__visual { position: static; }
  .blc-case__visual img { max-height: none; }
  .blc-prompt__grid { grid-template-columns: 1fr; }
  .blc-prompt__pane + .blc-prompt__pane { border-left: 0; border-top: 1px solid var(--blc-rule); }
  .blc-verdict { grid-template-columns: 1fr; }
  .blc-forks { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .blc-shell { width: calc(100% - 24px); padding-top: 92px; }
  .blc-hero,
  .blc-hero__copy,
  .blc-hero__dek,
  .blc-content,
  .blc-section { min-width: 0; max-width: 100%; }
  .blc-hero__copy { overflow: hidden; }
  .blc-hero h1 { font-size: 58px; }
  .blc-hero__thesis { grid-template-columns: 1fr; }
  .blc-hero__thesis div + div { padding-left: 0; border-left: 0; }
  .blc-hero__plate { min-height: 330px; }
  .blc-anchor-map,
  .blc-four-up { grid-template-columns: 1fr; }
  .blc-four-up figure:nth-child(n) img { aspect-ratio: auto; max-height: 610px; object-fit: contain; }
  .blc-section { padding-bottom: 72px; }
  .blc-section + .blc-section { padding-top: 56px; }
  .blc-case { padding: 28px 0 56px; }
  .blc-prompt__pane { padding: 16px; }
  .blc-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}