:root {
  --paper: #f8f6f0;
  --wash: #efeee9;
  --ink: #141414;
  --ink-soft: #2c2c2a;
  --muted: #4f4f4b;
  --line: #d4d3cd;
  --rule-dark: rgba(248, 246, 240, 0.22);
  /* MSQ DX brand green — SoT: msqdxBrand.green */
  --accent: #00ca55;
  --yellow: #fef14d;
  --pink: #f256b6;
  --purple: #b638ff;
  --green: #00ca55;
  --blue: #3080ff;
  --ground: #0c0c0c;
  --font-display: 'Noto Sans JP', 'Noto Sans', system-ui, sans-serif;
  --font-body: 'Noto Sans JP', 'Noto Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --page: min(1360px, calc(100% - 2.5rem));
  --radius: 2px;
  --title-gap: 1.35rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip {
  position: fixed;
  z-index: 80;
  top: 1rem;
  left: 1rem;
  padding: 0.6rem 0.9rem;
  background: var(--accent);
  color: var(--ink);
  text-decoration: none;
  transform: translateY(-180%);
}
.skip:focus { transform: none; }

.shell { width: var(--page); margin-inline: auto; }
.kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
}
.section-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}
.ghost-word {
  position: absolute;
  inset: auto 0 8%;
  margin: 0;
  font-size: clamp(5rem, 18vw, 14rem);
  font-weight: 900;
  letter-spacing: -0.08em;
  line-height: 0.75;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--ink) 10%, transparent);
  pointer-events: none;
  user-select: none;
}
.invert .ghost-word { -webkit-text-stroke-color: color-mix(in srgb, var(--paper) 14%, transparent); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0.75rem 1.35rem;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  background: transparent;
  color: inherit;
  font: 600 0.82rem/1 var(--font-body);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn:hover { background: var(--accent); color: var(--ink); border-color: var(--accent); }
.btn-fill {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.btn-fill:hover { background: var(--accent); border-color: var(--accent); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.hero {
  position: relative;
  min-height: 100svh;
  color: var(--paper);
  background: var(--ground);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto 1fr auto;
}
.helix-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.helix-stage canvas { width: 100%; height: 100%; display: block; }
.helix-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(12,12,12,0.88) 0%, rgba(12,12,12,0.28) 52%, rgba(12,12,12,0.7) 100%),
    radial-gradient(1200px 600px at 70% 40%, transparent, rgba(12,12,12,0.55));
}

.masthead {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0 0.9rem;
  border-bottom: 1px solid var(--rule-dark);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-weight: 600;
}
.brand svg { width: 22px; height: 22px; }
.nav { display: flex; gap: 1.4rem; }
.nav a { text-decoration: none; opacity: 0.8; }
.nav a:hover { opacity: 1; }

.hero-copy {
  position: relative;
  z-index: 2;
  display: grid;
  align-content: end;
  padding: 8vh 0 6vh;
  max-width: 18ch;
}
.hero h1 {
  margin: 0.35rem 0 var(--title-gap);
  font-size: clamp(3.1rem, 8.4vw, 7.4rem);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 0.86;
  text-wrap: balance;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.lede {
  margin: 0 0 1.75rem;
  max-width: 36rem;
  color: color-mix(in srgb, var(--paper) 88%, transparent);
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
}
.hero-foot {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 0 1.4rem;
  border-top: 1px solid var(--rule-dark);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--paper) 72%, transparent);
}

.band { position: relative; padding: clamp(4.5rem, 10vw, 8.5rem) 0; overflow: hidden; }
.band-head {
  display: grid;
  gap: 0.85rem;
  margin-bottom: clamp(2.4rem, 5vw, 4.2rem);
  max-width: 52rem;
}
.band h2 {
  margin: 0 0 var(--title-gap);
  font-size: clamp(2.2rem, 5.4vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.95;
  max-width: 14ch;
}
.band-head > h2,
.band-head > div > h2 {
  position: relative;
}
.band-head > h2::after,
.band-head > div > h2::after {
  content: '';
  display: block;
  width: 2.6rem;
  height: 0.38rem;
  margin-top: 0.85rem;
  background: var(--accent);
}
.prose { max-width: 40rem; color: var(--ink-soft); }
.prose p { margin: 0 0 1rem; }
.prose p:last-child { margin: 0; }
.band-head .prose { margin-top: 0; }
.stat-line {
  margin-top: 1.6rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1.1;
  color: var(--ink);
}

.steps { display: grid; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1.5rem;
  padding: 2.6rem 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--accent);
}
.step h3 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
}
.step p { margin: 0; color: var(--ink-soft); max-width: 46rem; }

.directory { display: grid; }
.dir-row {
  display: grid;
  grid-template-columns: 4rem 1fr minmax(0, 18rem);
  gap: 1.25rem;
  align-items: baseline;
  padding: 1.45rem 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
}
.dir-row:last-child { border-bottom: 1px solid var(--line); }
.dir-row .section-num,
.dir-row .kicker {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
}
.dir-row strong {
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: -0.03em;
}
.dir-row span:last-child { color: var(--ink-soft); font-size: 0.98rem; }

.invert { color: var(--paper); background: var(--ground); }
.invert .section-num,
.invert .kicker { color: color-mix(in srgb, var(--paper) 78%, transparent); }
.invert .prose { color: color-mix(in srgb, var(--paper) 86%, transparent); }
.stave {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 3rem;
  border-top: 1px solid var(--rule-dark);
}
.stave article {
  padding: 1.75rem 1.4rem 0 0;
  border-right: 1px solid var(--rule-dark);
}
.stave article:first-child { padding-left: 0; }
.stave article:last-child { border-right: 0; padding-right: 0; }
.stave .kicker {
  color: color-mix(in srgb, var(--paper) 70%, transparent);
}
.stave b {
  display: block;
  margin: 0.55rem 0 0.75rem;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.9;
  color: var(--accent);
}
.stave p {
  margin: 0;
  color: color-mix(in srgb, var(--paper) 82%, transparent);
  font-size: 0.98rem;
}

.fit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 4rem;
}
.fit-grid li {
  list-style: none;
  padding: 0 0 1.4rem;
  border-bottom: 1px solid var(--line);
}
.fit-grid ul { margin: 0; padding: 0; display: grid; gap: 1.4rem; }
.fit-grid h3 { margin: 0 0 0.55rem; letter-spacing: -0.03em; }
.fit-grid p { margin: 0; color: var(--ink-soft); }

.organism-inventory {
  margin-top: 2.5rem;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
}
.organism-inventory summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.organism-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.25rem;
}
.organism-columns h3 {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}
.organism-columns ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}
.organism-columns li {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.4;
}
.organism-columns code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink);
}

.cta-split {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 3rem;
  align-items: end;
}
.cta-split h2 { margin: 0 0 var(--title-gap); }
.cta-split .prose { color: var(--ink-soft); }

.portal {
  color: var(--ink);
  background: var(--yellow);
  overflow: hidden;
}
.portal-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: stretch;
}
.portal .section-num,
.portal .kicker { color: color-mix(in srgb, var(--ink) 72%, transparent); }
.portal h2 {
  margin: 0 0 var(--title-gap);
  font-size: clamp(2.2rem, 5.2vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.95;
  max-width: 12ch;
}
.portal .prose { color: color-mix(in srgb, var(--ink) 88%, transparent); max-width: 36rem; }
.portal-points {
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
  max-width: 34rem;
}
.portal-points li {
  padding: 0.65rem 0 0.65rem 1rem;
  border-left: 3px solid var(--ink);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.portal-card {
  display: grid;
  align-content: space-between;
  gap: 1.25rem;
  min-height: 100%;
  padding: 1.6rem 1.5rem 1.5rem;
  color: var(--paper);
  background: var(--ground);
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease;
}
.portal-card:hover {
  transform: translateY(-3px);
  border-color: var(--ink);
}
.portal-card .kicker { color: var(--accent); }
.portal-card strong {
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  letter-spacing: -0.045em;
  line-height: 1.05;
}
.portal-card p {
  margin: 0;
  color: color-mix(in srgb, var(--paper) 82%, transparent);
  max-width: 22rem;
}
.portal-go {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.instrument {
  color: var(--paper);
  background: var(--ground);
}
.instrument .section-num,
.instrument .kicker { color: color-mix(in srgb, var(--paper) 78%, transparent); }
.instrument .prose { color: color-mix(in srgb, var(--paper) 86%, transparent); }
.instrument-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
  gap: 2.5rem;
  align-items: start;
}
form.fit {
  display: grid;
  gap: 0.85rem;
}
.cluster {
  display: grid;
  gap: 0.75rem;
  padding: 1.15rem 0 1.35rem;
  border-top: 1px solid var(--rule-dark);
}
.cluster h3 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--paper) 70%, transparent);
}
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.field {
  display: grid;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.instrument .field { color: color-mix(in srgb, var(--paper) 68%, transparent); }
.field input,
.field select {
  width: 100%;
  min-height: 2.7rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font: 500 0.92rem/1.3 var(--font-body);
  text-transform: none;
  letter-spacing: -0.01em;
}
.instrument .field input,
.instrument .field select {
  border-color: var(--rule-dark);
  color: var(--paper);
}
.field select option { color: var(--ink); }
.hint { margin: 0; color: var(--accent); font-family: var(--font-mono); font-size: 0.72rem; }

.scoreboard {
  position: sticky;
  top: 1.25rem;
  padding: 1.4rem;
  border: 1px solid var(--rule-dark);
}
.scoreboard .kicker { color: var(--accent); }
.scoreboard [data-metric="meta"] {
  color: color-mix(in srgb, var(--paper) 82%, transparent);
}
.score {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule-dark);
}
.score b {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  letter-spacing: -0.07em;
  line-height: 0.9;
  color: var(--accent);
}
.score span { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; }
.score small { color: color-mix(in srgb, var(--paper) 68%, transparent); }
.warning {
  margin: 1rem 0 0;
  color: var(--yellow);
  font-size: 0.9rem;
}
.score-actions { display: grid; gap: 0.6rem; margin-top: 1.2rem; }

.close {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  align-items: end;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  :root { --page: min(100% - 1.5rem, 100%); }
  .nav { display: none; }
  .hero-copy { max-width: none; padding-top: 12vh; }
  .fit-grid,
  .cta-split,
  .portal-grid,
  .instrument-grid,
  .fields,
  .stave,
  .dir-row,
  .step,
  .organism-columns { grid-template-columns: 1fr; }
  .stave article { border-right: 0; border-bottom: 1px solid var(--rule-dark); padding: 1.2rem 0; }
  .hero-foot { flex-direction: column; align-items: flex-start; }
  .ghost-word { font-size: 18vw; }
  .portal-card { min-height: 14rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn,
  .portal-card { transition: none; }
}

/* Print: Fit-Check + form only. Elsewhere: blank. */
@media print {
  @page { margin: 12mm; }
  body * { visibility: hidden; }
  #fit-check,
  #fit-check * { visibility: visible; }
  #fit-check {
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    color: #000 !important;
    background: #fff !important;
    padding: 0 !important;
  }
  #fit-check .section-num,
  #fit-check .kicker,
  #fit-check .prose,
  #fit-check .cluster h3,
  #fit-check .field,
  #fit-check .score span,
  #fit-check .score small,
  #fit-check [data-metric="meta"] { color: #222 !important; }
  #fit-check h2,
  #fit-check .score b,
  #fit-check .hint { color: #000 !important; }
  #fit-check .scoreboard { position: static; border-color: #ccc; }
  #fit-check .cluster,
  #fit-check .score { border-color: #ccc; }
  #fit-check .field input,
  #fit-check .field select {
    border-color: #999;
    color: #000 !important;
  }
  #fit-check .score-actions,
  #fit-check .helix-stage,
  .masthead,
  .hero,
  .btn-row { display: none !important; }
  .instrument-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
}