:root {
  --canvas: #000;
  --canvas-strong: #050505;
  --panel: rgba(0, 0, 0, 0.92);
  --panel-strong: #0b0b0b;
  --ink: #fff;
  --ink-soft: rgba(255, 255, 255, 0.78);
  --ink-faint: rgba(255, 255, 255, 0.56);
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.32);
  --accent: #fff;
  --accent-soft: rgba(255, 255, 255, 0.08);
  --accent-alt: rgba(255, 255, 255, 0.72);
  --success: rgba(255, 255, 255, 0.86);
  --warning: rgba(255, 255, 255, 0.72);
  --shadow: none;
  --radius-xl: 4px;
  --radius-lg: 4px;
  --radius-md: 4px;
  --radius-sm: 4px;
  --site-width: min(1420px, calc(100vw - 48px));
  --font-display: "IBM Plex Sans", "IBM Plex Sans JP", sans-serif;
  --font-body: "IBM Plex Sans JP", "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 24%),
    var(--canvas);
  font-family: var(--font-body);
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
  opacity: 0.42;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 22%),
    linear-gradient(90deg, transparent 0, rgba(255, 255, 255, 0.02) 48%, transparent 100%);
  pointer-events: none;
  z-index: -1;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 1px solid #fff;
  outline-offset: 3px;
}

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

[hidden] {
  display: none !important;
}

.page-shell {
  width: var(--site-width);
  margin: 0 auto;
  padding: 116px 0 72px;
}

.site-header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  width: var(--site-width);
  padding: 0;
  border: 0;
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  mix-blend-mode: difference;
}

.brand-link {
  text-decoration: none;
  min-width: 0;
  display: grid;
  gap: 4px;
}

.brand-name {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

.header-nav {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.header-nav a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 0 8px 12px;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  opacity: 0.74;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    border-color 180ms ease;
}

.header-nav a:hover {
  transform: translateY(-1px);
  opacity: 1;
  border-color: #fff;
}

.header-nav a.is-current {
  opacity: 1;
  border-color: #fff;
}

.hero {
  padding: 32px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 18px;
  align-items: stretch;
}

.hero-panel,
.info-panel,
.section-panel,
.card,
.metric-card,
.gateway-panel,
.filter-panel,
.detail-panel,
.gallery-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-panel {
  position: relative;
  overflow: clip;
  padding: clamp(28px, 4vw, 56px);
  min-height: 640px;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.28) 12%, rgba(255, 255, 255, 0.12) 88%, transparent);
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 24px;
}

.hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.8rem, 9vw, 8rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
  font-weight: 200;
  max-width: 12ch;
  text-transform: uppercase;
}

.hero-title span {
  display: block;
}

.hero-summary {
  margin: 28px 0 0;
  max-width: 62ch;
  font-size: 1.02rem;
  color: var(--ink-soft);
}

.hero-actions,
.page-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.button-link,
.chip-link,
.gateway-link {
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: #111;
  color: #fff;
  min-width: 0;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.button-link:hover,
.chip-link:hover,
.gateway-link:hover {
  transform: translateY(-2px);
  border-color: #fff;
  background: #1a1a1a;
}

.button-link.primary {
  background: #161616;
  border-color: rgba(255, 255, 255, 0.34);
}

.button-link.secondary,
.chip-link {
  background: #080808;
}

.hero-strip {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-chip {
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: #050505;
}

.hero-chip-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-chip-value {
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
}

.info-panel {
  padding: 24px;
  display: grid;
  gap: 16px;
}

.portrait-wrap {
  border-radius: var(--radius-xl);
  overflow: clip;
  min-height: 280px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 26%),
    #030303;
}

.portrait-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #030303;
}

.info-stack {
  display: grid;
  gap: 10px;
}

.info-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.info-value {
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.section {
  padding: 44px 0 0;
}

.section-head {
  display: flex;
  gap: 18px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 18px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.section-kicker::before {
  content: "";
  width: 42px;
  height: 1px;
  background: var(--line-strong);
}

.section-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
  font-weight: 200;
  text-transform: uppercase;
}

.section-description {
  margin: 12px 0 0;
  max-width: 68ch;
  color: var(--ink-soft);
}

.section-panel {
  padding: 28px;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

.span-12 { grid-column: span 12; }
.span-8 { grid-column: span 8; }
.span-7 { grid-column: span 7; }
.span-6 { grid-column: span 6; }
.span-5 { grid-column: span 5; }
.span-4 { grid-column: span 4; }

.metric-grid,
.card-grid,
.archive-preview-grid,
.archive-card-grid {
  display: grid;
  gap: 16px;
}

.metric-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.archive-preview-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.archive-card-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card,
.card,
.archive-card,
.signal-card {
  padding: 22px;
  border: 1px solid var(--line);
  background: #050505;
}

.metric-label,
.card-label,
.status-pill,
.meta-row,
.mini-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.metric-value {
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: 2.2rem;
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  font-weight: 300;
}

.metric-copy {
  margin-top: 10px;
  color: var(--ink-soft);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  content-visibility: auto;
  contain-intrinsic-size: 320px;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.card:hover,
.archive-card:hover,
.gallery-card:hover {
  transform: translateY(-4px);
  border-color: #fff;
  background: #101010;
}

.card-title,
.archive-card-title,
.detail-title,
.subhead {
  font-family: var(--font-body);
  font-size: 1.34rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0;
  font-weight: 300;
}

.card-copy,
.archive-card-copy,
.signal-copy,
.detail-copy {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.tag-row,
.meta-pill-row,
.signal-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag,
.meta-pill,
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #080808;
}

.status-pill.restricted {
  color: var(--warning);
  border-style: dashed;
}

.status-pill.public {
  color: var(--success);
}

.split-callout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 16px;
}

.callout-box {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: #050505;
}

.callout-box strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.highlight-list,
.detail-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.highlight-list li + li,
.detail-list li + li {
  margin-top: 8px;
}

.timeline-blocks {
  display: grid;
  gap: 18px;
}

.timeline-block {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: #050505;
  content-visibility: auto;
  contain-intrinsic-size: 240px;
}

.timeline-block h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: -0.04em;
  font-weight: 300;
}

.markdown > :first-child {
  margin-top: 0;
}

.markdown > :last-child {
  margin-bottom: 0;
}

.markdown h1,
.markdown h2,
.markdown h3,
.markdown h4 {
  font-family: var(--font-display);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-top: 1.2em;
  margin-bottom: 0.5em;
}

.markdown h1 { font-size: 2rem; }
.markdown h2 { font-size: 1.6rem; }
.markdown h3 { font-size: 1.25rem; }
.markdown h4 { font-size: 1.1rem; }

.markdown p,
.markdown li,
.markdown blockquote {
  color: var(--ink-soft);
}

.markdown ul,
.markdown ol {
  padding-left: 1.2rem;
}

.markdown li + li {
  margin-top: 0.55rem;
}

.markdown a {
  color: var(--ink);
  text-underline-offset: 3px;
}

.markdown hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 1.5rem 0;
}

.filter-panel {
  padding: 20px;
  display: grid;
  gap: 14px;
}

.filter-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-input,
.filter-select {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #080808;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 14px 16px;
}

.filter-input {
  min-width: min(100%, 340px);
  flex: 1 1 280px;
}

.filter-select {
  min-width: 200px;
}

.results-note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.archive-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-decoration: none;
  content-visibility: auto;
  contain-intrinsic-size: 420px;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.archive-thumb {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: clip;
  border: 1px solid var(--line);
  background: #020202;
}

.archive-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #020202;
}

.detail-hero {
  padding: 38px 0 18px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 18px;
}

.detail-panel {
  padding: 26px;
}

.detail-title {
  font-size: clamp(2.4rem, 6vw, 5rem);
  margin-top: 12px;
  text-transform: uppercase;
}

.detail-media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.gallery-card {
  overflow: clip;
  text-decoration: none;
  content-visibility: auto;
  contain-intrinsic-size: 320px;
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #020202;
}

.gallery-caption {
  padding: 14px 16px 18px;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.gateway-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.gateway-panel {
  width: min(860px, calc(100vw - 32px));
  padding: clamp(28px, 5vw, 54px);
}

.gateway-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 11vw, 7.5rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
}

.gateway-copy {
  margin: 18px 0 0;
  max-width: 56ch;
  color: var(--ink-soft);
}

.gateway-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.gateway-link {
  padding: 20px;
}

.gateway-link strong {
  display: block;
  font-family: var(--font-body);
  font-size: 1.35rem;
  margin-bottom: 4px;
  font-weight: 300;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.footer {
  width: var(--site-width);
  margin: 22px auto 36px;
  padding: 20px 22px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 900ms ease,
    transform 900ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .hero-grid,
  .split-callout,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .metric-grid,
  .card-grid,
  .archive-preview-grid,
  .archive-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .span-8,
  .span-7,
  .span-6,
  .span-5,
  .span-4 {
    grid-column: span 12;
  }

  .hero-panel {
    min-height: auto;
  }
}

@media (max-width: 760px) {
  .site-header {
    position: static;
    transform: none;
    mix-blend-mode: normal;
    width: calc(100vw - 24px);
    margin: 14px auto 0;
    padding: 0;
    flex-direction: column;
    align-items: stretch;
  }

  .header-nav {
    justify-content: flex-start;
  }

  .page-shell {
    width: calc(100vw - 24px);
    padding-top: 28px;
  }

  .hero {
    padding-top: 24px;
  }

  .hero-strip,
  .metric-grid,
  .card-grid,
  .archive-preview-grid,
  .archive-card-grid,
  .gateway-actions,
  .detail-media-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: clamp(3rem, 18vw, 5rem);
  }

  .section-title {
    font-size: clamp(2rem, 12vw, 3.5rem);
  }

  .hero-panel,
  .info-panel,
  .section-panel,
  .detail-panel,
  .gateway-panel {
    padding: 22px;
  }

  .filter-input,
  .filter-select {
    width: 100%;
    min-width: 0;
  }

  .footer {
    width: calc(100vw - 24px);
    margin-top: 18px;
    padding: 18px 0 0;
  }
}