:root {
  color-scheme: light;
  --ink: #111111;
  --paper: #f3f0e8;
  --paper-bright: #fffdf7;
  --muted: #d7d3ca;
  --signal: #ff4a2f;
  --focus: #7b31ff;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(to right, rgba(17, 17, 17, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(17, 17, 17, 0.06) 1px, transparent 1px),
    var(--paper);
  background-size: 40px 40px;
  font-family: var(--font-mono);
  line-height: 1.5;
}

button,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
textarea:focus-visible,
input:focus-visible,
summary:focus-visible,
.site-return:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--paper-bright);
  background: var(--ink);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.protocol-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem max(1rem, calc((100vw - 1120px) / 2));
  color: var(--paper);
  background: var(--ink);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.protocol-header p {
  margin: 0;
}

.site-return {
  color: inherit;
  font-weight: 700;
  text-underline-offset: 0.2em;
}

.header-stage {
  display: grid;
  gap: 0.15rem;
  text-align: right;
}

.header-stage #human-stage-label {
  color: var(--signal);
  font-weight: 700;
}

main {
  width: min(1120px, calc(100% - 2rem));
  min-height: calc(100vh - 3rem);
  margin: 0 auto;
  padding: clamp(2rem, 7vw, 5rem) 0;
}

.journey-progress {
  margin-bottom: 1rem;
}

.journey-progress ol {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.journey-progress li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  border: 2px solid var(--ink);
  border-right: 0;
  padding: 0.55rem 0.7rem;
  background: var(--paper-bright);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.journey-progress li:last-child {
  border-right: 2px solid var(--ink);
}

.journey-progress li span {
  display: grid;
  flex: 0 0 1.65rem;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.journey-progress li.is-current {
  color: var(--ink);
  background: var(--signal);
}

.journey-progress li.is-complete {
  color: var(--paper);
  background: var(--ink);
}

.stage {
  border: 3px solid var(--ink);
  padding: clamp(1.25rem, 4vw, 3rem);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
}

.welcome {
  background:
    linear-gradient(135deg, transparent 0 72%, color-mix(in srgb, var(--signal) 22%, transparent) 72%),
    var(--paper);
}

.welcome h1 {
  max-width: 16ch;
}

.welcome-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2.5rem 0 1rem;
}

.welcome-summary article {
  border-top: 6px solid var(--ink);
  padding: 1rem 0;
}

.welcome-summary h2,
.welcome-summary p {
  margin-bottom: 0;
}

.summary-number {
  color: var(--signal);
  font-weight: 700;
}

.expectation-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 1rem 0 2rem;
  border: 2px solid var(--ink);
  background: var(--ink);
}

.expectation-panel div {
  padding: 1rem;
  background: var(--paper-bright);
}

.expectation-panel p {
  margin-bottom: 0;
}

.stage-kicker {
  margin-bottom: 1rem;
  color: var(--signal);
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 18ch;
  margin: 0 0 1.5rem;
  font-size: clamp(2.1rem, 7vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

h2 {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
}

.lead {
  max-width: 62ch;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.stage-guide {
  max-width: 78ch;
  margin: 1.5rem 0 2rem;
  border: 2px solid var(--ink);
  border-left: 12px solid var(--signal);
  padding: 1rem 1.15rem;
  background: var(--paper-bright);
}

.stage-guide strong {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.stage-guide p {
  margin: 0.45rem 0 0;
}

.stage-guide .next-step {
  border-top: 1px solid var(--ink);
  padding-top: 0.65rem;
  font-size: 0.85rem;
  font-weight: 700;
}

.artwork-strip {
  display: grid;
  min-height: 150px;
  margin: 1.5rem 0 2rem;
  place-items: center;
  overflow: hidden;
  border: 2px solid var(--ink);
  padding: clamp(0.75rem, 2vw, 1.35rem);
  background: var(--ink);
}

.artwork-strip img {
  display: block;
  width: min(100%, 900px);
  height: auto;
  max-height: 300px;
  object-fit: contain;
}

.artwork-route {
  min-height: 190px;
}

.artwork-route img {
  width: min(82%, 650px);
  max-height: 330px;
}

.stage:not([hidden]) .artwork-strip img,
.stage:not([hidden]) .ending-signal img {
  animation: reveal-contact-line 900ms ease-out both;
}

.detect-grid,
.contact-grid,
.decision-grid {
  display: grid;
  gap: 1.25rem;
  margin: 2rem 0;
}

.detect-grid {
  grid-template-columns: minmax(0, 1fr) minmax(240px, 0.38fr);
}

.instruction-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: platform;
}

.instruction-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border: 2px solid var(--ink);
  background: var(--paper-bright);
  counter-increment: platform;
}

.instruction-list li span::before {
  content: "0" counter(platform) " ";
}

.diagnostic {
  padding: 1rem;
  border: 2px solid var(--ink);
  background: var(--muted);
}

.diagnostic > strong {
  display: block;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--ink);
  font-size: 0.82rem;
}

.diagnostic dl {
  display: grid;
  gap: 1rem;
}

.diagnostic dl div {
  display: grid;
  gap: 0.25rem;
}

.diagnostic dt,
.gene-meta,
.method {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.diagnostic dd {
  margin: 0;
  font-weight: 700;
}

details {
  margin: 1rem 0;
  border-left: 5px solid var(--ink);
  padding: 0.5rem 1rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.action {
  min-height: 48px;
  border: 2px solid var(--ink);
  padding: 0.8rem 1rem;
  font-weight: 700;
  text-align: left;
}

.action-with-note {
  display: grid;
  gap: 0.3rem;
}

.action-with-note small {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.action-primary {
  color: var(--ink);
  background: var(--signal);
}

.action-secondary {
  color: var(--ink);
  background: var(--paper-bright);
}

.action-quiet {
  border-color: transparent;
  background: transparent;
  text-decoration: underline;
}

.stage > .action-primary {
  width: 100%;
  margin-top: 2rem;
}

.action-row,
.stacked-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.stacked-actions {
  flex-direction: column;
}

.session-warning {
  max-width: 70ch;
  border: 2px solid var(--ink);
  padding: 1rem;
  background: var(--ink);
  color: var(--paper);
  font-weight: 700;
}

form label,
fieldset legend {
  display: block;
  margin-bottom: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.fieldset-help {
  margin: -0.2rem 0 0.45rem;
  font-size: 0.9rem;
}

textarea {
  width: 100%;
  resize: vertical;
  border: 3px solid var(--ink);
  border-radius: 0;
  padding: 1rem;
  color: var(--ink);
  background: var(--paper-bright);
}

.field-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

.field-meta p {
  margin-top: 0.5rem;
}

.over-limit,
.error {
  color: #9d1b00;
  font-weight: 700;
}

.error:empty {
  display: none;
}

fieldset {
  display: grid;
  gap: 0.65rem;
  margin: 2rem 0 0;
  border: 0;
  padding: 0;
}

.handling-option {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.75rem;
  min-height: 48px;
  margin: 0;
  border: 2px solid var(--ink);
  padding: 0.75rem 1rem;
  background: var(--paper-bright);
}

.handling-option > span {
  display: grid;
  gap: 0.2rem;
}

.handling-option small {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.03em;
}

.handling-option:has(input:checked) {
  background: var(--signal);
}

.handling-option input {
  width: 1.25rem;
  height: 1.25rem;
}

.notice-panel,
.review-result {
  margin-top: 2rem;
  border: 3px solid var(--ink);
  padding: 1.25rem;
  background: var(--paper-bright);
}

blockquote,
pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

blockquote {
  margin: 1rem 0;
  border-left: 5px solid var(--signal);
  padding-left: 1rem;
}

.gene-card,
.counter-instruction,
.human-panel,
.protocol-panel,
.decision-grid article {
  border: 2px solid var(--ink);
  padding: 1.25rem;
  background: var(--paper-bright);
}

.gene-card {
  border-left: 12px solid var(--signal);
}

.gene-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.gene-card pre,
.human-panel pre,
.review-result pre {
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  font-weight: 700;
}

.counter-instruction {
  margin-top: 1rem;
  color: var(--paper);
  background: var(--ink);
}

.contact-grid {
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
}

.protocol-panel {
  color: var(--paper);
  background: var(--ink);
}

.protocol-panel dl {
  display: grid;
  gap: 1.15rem;
}

.protocol-panel dl div {
  border-top: 1px solid var(--paper);
  padding-top: 0.75rem;
}

.protocol-panel dt {
  color: var(--signal);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.protocol-panel dt span,
.protocol-panel dt small {
  display: block;
}

.protocol-panel dt small {
  margin-top: 0.2rem;
  color: var(--paper);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}

.protocol-panel dd {
  margin: 0.3rem 0 0;
  font-weight: 700;
}

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

.decision-grid article {
  display: flex;
  position: relative;
  flex-direction: column;
  overflow: hidden;
}

.disappear-card h2,
.disappear-card > span {
  max-width: calc(100% - 4.5rem);
}

.erasure-figure {
  position: absolute;
  top: 1rem;
  right: 0.75rem;
  width: 3.6rem;
  height: 8.5rem;
  object-fit: cover;
  object-position: top;
  opacity: 0.72;
  filter: brightness(0);
  pointer-events: none;
}

.outcome-list {
  margin: 0.5rem 0 1.5rem;
  padding-left: 1.2rem;
  font-size: 0.9rem;
}

.outcome-list li + li {
  margin-top: 0.35rem;
}

.review-guide {
  max-width: 70ch;
  border-left: 6px solid var(--signal);
  padding-left: 1rem;
}

.review-guide h2 {
  margin-bottom: 0.35rem;
}

.review-guide p {
  margin-top: 0;
}

.decision-grid article > .action,
.decision-grid article > .stacked-actions {
  margin-top: auto;
}

.disappear-card {
  background: var(--signal) !important;
}

.operation-status {
  min-height: 3rem;
  border-top: 3px solid var(--ink);
  padding-top: 1rem;
  font-weight: 700;
}

.memorial {
  position: relative;
  min-height: 70vh;
  overflow: hidden;
  color: var(--paper);
  background: var(--ink);
}

.ending-signal {
  width: 100%;
  margin: 3rem 0 1.5rem;
  overflow: hidden;
}

.ending-signal img {
  display: block;
  width: 100%;
  min-width: 850px;
  height: auto;
  transform: translateX(-4%);
}

.q888-signature {
  display: block;
  width: min(9rem, 32vw);
  height: auto;
  margin-left: auto;
}

.absence {
  margin: 4rem 0 2rem;
  color: var(--signal);
  font-weight: 700;
}

@keyframes reveal-contact-line {
  from {
    clip-path: inset(0 100% 0 0);
    opacity: 0;
  }

  to {
    clip-path: inset(0);
    opacity: 1;
  }
}

dialog {
  width: min(620px, calc(100% - 2rem));
  border: 3px solid var(--ink);
  padding: 1.5rem;
  color: var(--ink);
  background: var(--paper);
}

dialog::backdrop {
  background: rgba(17, 17, 17, 0.78);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

@media (max-width: 760px) {
  .protocol-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-stage {
    text-align: left;
  }

  .journey-progress ol {
    grid-template-columns: repeat(5, 1fr);
  }

  .journey-progress li {
    justify-content: center;
    border-right: 0;
    padding: 0.45rem 0.25rem;
    font-size: 0;
  }

  .journey-progress li span {
    flex-basis: 1.8rem;
    width: 1.8rem;
    height: 1.8rem;
    font-size: 0.75rem;
  }

  main {
    width: min(100% - 1rem, 1120px);
    padding: 0.5rem 0;
  }

  .stage {
    padding: 1rem;
  }

  .detect-grid,
  .contact-grid,
  .decision-grid,
  .welcome-summary,
  .expectation-panel {
    grid-template-columns: 1fr;
  }

  .instruction-list li,
  .field-meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .action-row {
    flex-direction: column;
  }

  .action-row .action {
    width: 100%;
  }

  .artwork-strip {
    min-height: 125px;
    margin-inline: -0.35rem;
  }

  .artwork-detect img {
    width: 135%;
    max-width: none;
    transform: translateX(8%);
  }

  .artwork-route img {
    width: 115%;
    max-width: none;
    transform: translateX(4%);
  }

  .ending-signal {
    margin-inline: -1rem;
    width: calc(100% + 2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}