:root {
  --ink: #17201d;
  --ink-soft: #39443f;
  --muted: #69736e;
  --paper: #f3f1ea;
  --surface: #fbfaf6;
  --surface-strong: #ffffff;
  --line: #d5d4cc;
  --line-strong: #b8bbb4;
  --accent: #275d4d;
  --accent-soft: #dce8e2;
  --accent-ink: #153d31;
  --warning: #9a5b17;
  --warning-soft: #f8e9d3;
  --danger: #8b3131;
  --danger-soft: #f4dede;
  --blue: #315f83;
  --blue-soft: #e0eaf2;
  --shadow: 0 18px 50px rgba(23, 32, 29, 0.08);
  --radius-sm: 7px;
  --radius: 12px;
  --radius-lg: 18px;
  --page: min(1240px, calc(100vw - 48px));
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #7db7a4;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
}

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

.topbar {
  width: var(--page);
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line-strong);
}

.brand-lockup,
.safety-badge {
  display: flex;
  align-items: center;
}

.brand-lockup {
  gap: 12px;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.safety-badge {
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid #85a99c;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.safety-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(39, 93, 77, 0.12);
}

main,
footer {
  width: var(--page);
  margin: 0 auto;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 72px;
  align-items: end;
  padding: 82px 0 68px;
}

.eyebrow,
.rail-label,
.response-kicker,
.proof-label,
.evidence-subhead,
.boundary-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--accent);
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 830px;
  margin: 15px 0 22px;
  font-size: clamp(44px, 6vw, 82px);
  font-weight: 760;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.lede {
  max-width: 730px;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.5;
}

.intro-proof {
  padding: 24px 0 5px 25px;
  border-left: 1px solid var(--line-strong);
}

.proof-label {
  color: var(--muted);
}

.proof-value {
  margin: 8px 0 4px;
  font-size: 27px;
  font-weight: 720;
  letter-spacing: -0.04em;
}

.proof-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.selection-section,
.demo-section,
.boundary-section {
  padding: 44px 0 58px;
  border-top: 1px solid var(--line-strong);
}

.section-heading {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 25px;
}

.step-number {
  padding-top: 4px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.section-heading h2 {
  margin: 0 0 3px;
  font-size: 24px;
  letter-spacing: -0.035em;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.business-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding-left: 60px;
}

.business-option {
  min-height: 102px;
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 20px;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.45);
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.business-option:hover {
  border-color: #8b958f;
  transform: translateY(-1px);
}

.business-option[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--surface-strong);
  box-shadow: inset 4px 0 0 var(--accent);
}

.business-name {
  font-size: 18px;
  font-weight: 720;
  letter-spacing: -0.02em;
}

.business-stage {
  grid-column: 1;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.scenario-tag,
.status-tag,
.tool-pill,
.task-status {
  width: fit-content;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.scenario-tag {
  align-self: start;
  padding: 6px 8px;
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.scenario-tag.conflict {
  background: var(--warning-soft);
  color: #6e3b09;
}

.demo-shell {
  display: grid;
  grid-template-columns: 238px minmax(0, 1fr) 262px;
  min-height: 620px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.question-rail,
.evidence-panel {
  padding: 24px 20px;
  background: #eeece5;
}

.question-rail {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
}

.rail-label {
  color: var(--muted);
}

.action-list {
  display: grid;
  gap: 7px;
  margin-top: 15px;
}

.action-button {
  min-height: 66px;
  padding: 11px 12px;
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 9px;
  align-items: start;
  text-align: left;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.action-button:hover {
  background: rgba(255, 255, 255, 0.65);
}

.action-button[aria-pressed="true"] {
  border-color: var(--line);
  background: var(--surface-strong);
}

.action-index {
  padding-top: 2px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.action-label {
  display: block;
  font-size: 14px;
  font-weight: 680;
  line-height: 1.3;
}

.action-tool {
  grid-column: 2;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: -0.02em;
  line-height: 1.35;
  white-space: nowrap;
}

.rail-boundary {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.rail-boundary p {
  margin: 0 0 4px;
  color: var(--accent-ink);
  font-size: 13px;
  font-weight: 700;
}

.rail-boundary span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.response-panel {
  min-width: 0;
  padding: 28px 30px 34px;
  background: var(--surface-strong);
}

.response-header {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.response-kicker {
  color: var(--accent);
}

.response-header h2 {
  margin: 7px 0 0;
  font-size: clamp(25px, 3vw, 34px);
  letter-spacing: -0.045em;
  line-height: 1.12;
}

.tool-pill {
  flex: 0 0 auto;
  max-width: 190px;
  padding: 7px 9px;
  background: var(--blue-soft);
  color: #244d6a;
  overflow-wrap: anywhere;
  text-transform: none;
}

.response-body {
  padding-top: 26px;
}

.answer-block {
  margin-bottom: 25px;
}

.answer-label {
  margin: 0 0 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.answer-text {
  margin: 0;
  font-size: clamp(21px, 2.4vw, 29px);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.25;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 25px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--line);
}

.metric {
  min-width: 0;
  padding: 14px;
  background: var(--surface);
}

.metric dt {
  margin-bottom: 7px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.metric dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.content-heading {
  margin: 27px 0 11px;
  font-size: 15px;
  letter-spacing: -0.015em;
}

.task-list,
.warning-list,
.locator-list,
.boundary-column ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.task-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px 16px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.task-title {
  font-weight: 670;
}

.task-meta {
  grid-column: 1;
  color: var(--muted);
  font-size: 12px;
}

.task-status {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  padding: 5px 7px;
  background: #ecece6;
  color: var(--ink-soft);
}

.task-status.blocked {
  background: var(--warning-soft);
  color: #6e3b09;
}

.decision-card,
.draft-card,
.attachment-card,
.conflict-card,
.empty-card {
  margin-top: 17px;
  padding: 18px;
  border-radius: var(--radius-sm);
}

.decision-card,
.draft-card,
.attachment-card {
  border: 1px solid #b9cec6;
  background: #f2f7f4;
}

.conflict-card {
  border: 1px solid #deb989;
  background: var(--warning-soft);
}

.empty-card {
  border: 1px solid var(--line);
  background: var(--surface);
}

.card-kicker {
  margin: 0 0 7px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.card-title {
  margin: 0;
  font-size: 18px;
  font-weight: 720;
  letter-spacing: -0.025em;
}

.card-copy {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.recipient-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: baseline;
  margin-bottom: 17px;
  color: var(--muted);
  font-size: 13px;
}

.recipient-line strong {
  color: var(--ink);
}

.draft-subject {
  margin: 0 0 14px;
  padding-bottom: 13px;
  border-bottom: 1px solid #cbdad4;
  font-weight: 720;
}

.draft-body {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.warning-list {
  display: grid;
  gap: 8px;
  margin-top: 15px;
}

.warning-item {
  padding-left: 15px;
  color: #6e3b09;
  font-size: 13px;
  position: relative;
}

.warning-item::before {
  content: "";
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--warning);
}

.evidence-panel {
  min-width: 0;
  border-left: 1px solid var(--line);
}

.evidence-heading h2 {
  margin: 6px 0 0;
  font-size: 20px;
  letter-spacing: -0.035em;
}

.evidence-meta {
  display: grid;
  gap: 11px;
  margin: 22px 0;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.evidence-meta div {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
}

.evidence-meta dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.evidence-meta dd {
  margin: 0;
  font-size: 12px;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.evidence-subhead {
  color: var(--muted);
}

.evidence-list {
  display: grid;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.evidence-list li {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10px;
  overflow-wrap: anywhere;
}

.evidence-list li::before {
  content: "/ ";
  color: var(--accent);
}

.fingerprint-block {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.fingerprint-block code {
  display: block;
  margin-top: 9px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.compact-heading {
  margin-bottom: 22px;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding-left: 60px;
}

.boundary-column {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.allowed-column {
  border-top: 3px solid var(--accent);
}

.blocked-column {
  border-top: 3px solid var(--danger);
}

.boundary-label {
  margin-bottom: 13px;
}

.allowed-column .boundary-label {
  color: var(--accent);
}

.blocked-column .boundary-label {
  color: var(--danger);
}

.boundary-column li {
  position: relative;
  padding: 9px 0 9px 20px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}

.boundary-column li::before {
  position: absolute;
  left: 0;
  color: var(--accent);
  content: "+";
  font-family: var(--mono);
  font-weight: 700;
}

.blocked-column li::before {
  color: var(--danger);
  content: "×";
}

.noscript-notice {
  padding: 16px;
  border: 1px solid var(--warning);
  background: var(--warning-soft);
}

footer {
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 12px;
}

footer p {
  margin: 0;
}

footer strong {
  color: var(--ink);
}

@media (max-width: 1080px) {
  .demo-shell {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .evidence-panel {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 180px 1fr 1fr;
    gap: 22px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .evidence-meta {
    margin: 0;
    padding: 0 22px;
    border: 0;
    border-right: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }

  .fingerprint-block {
    margin: 0;
    padding: 0;
    border: 0;
  }
}

@media (max-width: 800px) {
  :root {
    --page: min(100% - 30px, 720px);
  }

  .topbar {
    min-height: 68px;
  }

  .brand-name {
    font-size: 14px;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 58px 0 50px;
  }

  .intro-proof {
    max-width: 480px;
  }

  .business-list,
  .boundary-grid {
    grid-template-columns: 1fr;
    padding-left: 0;
  }

  .demo-shell {
    grid-template-columns: 1fr;
  }

  .question-rail {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .action-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .rail-boundary {
    display: none;
  }

  .evidence-panel {
    grid-template-columns: 1fr;
  }

  .evidence-meta {
    margin: 0;
    padding: 17px 0;
    border-right: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  footer {
    padding: 26px 0;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

@media (max-width: 560px) {
  .brand-name {
    max-width: 150px;
    line-height: 1.15;
  }

  .safety-badge {
    padding: 7px 9px;
    font-size: 9px;
  }

  h1 {
    font-size: clamp(42px, 14vw, 60px);
  }

  .section-heading {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .action-list {
    grid-template-columns: 1fr;
  }

  .response-panel {
    padding: 24px 19px 28px;
  }

  .response-header {
    flex-direction: column;
  }

  .tool-pill {
    max-width: 100%;
  }

  .metric-grid {
    grid-template-columns: 1fr;
  }

  .task-row {
    grid-template-columns: 1fr;
  }

  .task-status {
    grid-column: 1;
    grid-row: auto;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}