:root {
  --paper: #f3efe5;
  --paper-deep: #e8e0d1;
  --ink: #171815;
  --ink-soft: #57574f;
  --line: #c8c0b1;
  --line-dark: #8f897e;
  --rust: #994a33;
  --rust-soft: #ead5c9;
  --green: #557163;
  --green-deep: #344b40;
  --green-soft: #d8e0d7;
  --white: #fbf8f0;
  --serif: Georgia, "Times New Roman", "Songti SC", SimSun, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --page: min(1180px, calc(100vw - 48px));
  --section-space: clamp(88px, 10vw, 148px);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

button,
summary,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

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

button:disabled {
  opacity: 1;
}

::selection {
  background: var(--green-deep);
  color: var(--white);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

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

:focus-visible {
  outline: 3px solid var(--rust);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 66px;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(243, 239, 229, 0.96);
}

.case-mark {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  width: fit-content;
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.case-mark span:first-child {
  padding-right: 12px;
  border-right: 1px solid var(--line-dark);
  color: var(--rust);
  font-family: var(--mono);
}

.section-nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

.section-nav a {
  position: relative;
  text-decoration: none;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.section-nav a::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 150ms ease;
}

.section-nav a:hover::after,
.section-nav a:focus-visible::after {
  transform: scaleX(1);
}

.delivery-note {
  justify-self: end;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.section-shell {
  width: var(--page);
  margin: 0 auto;
  padding-block: var(--section-space);
  border-bottom: 1px solid var(--line-dark);
}

.hero {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 270px;
  gap: clamp(26px, 4.2vw, 64px);
  min-height: calc(100vh - 66px);
  align-items: center;
  padding-top: clamp(76px, 10vw, 132px);
}

.hero-index,
.section-number {
  color: var(--rust);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-index {
  align-self: start;
  padding-top: 12px;
  writing-mode: vertical-rl;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

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

.eyebrow.green {
  color: var(--green-deep);
}

h1,
h2,
h3,
h4,
p,
blockquote {
  margin-top: 0;
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.045em;
}

h1 {
  max-width: 780px;
  margin-bottom: 32px;
  font-size: clamp(46px, 6.3vw, 76px);
  line-height: 1.08;
}

.hero-title-lead {
  white-space: nowrap;
}

.hero-summary {
  max-width: 680px;
  margin-bottom: 48px;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.65vw, 21px);
  line-height: 1.75;
}

.hero-meta {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.hero-meta dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
}

.hero-meta div {
  padding: 17px 18px 19px 0;
}

.hero-meta div + div {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.hero-meta dt {
  margin-bottom: 5px;
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.hero-meta dd {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
}

.hero-aside {
  align-self: end;
  margin-bottom: 8px;
  padding: 22px 0 0;
  border-top: 3px solid var(--ink);
}

.margin-label {
  margin-bottom: 20px;
  color: var(--rust);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.hero-aside blockquote {
  margin-bottom: 36px;
  font-family: var(--serif);
  font-size: 25px;
  line-height: 1.55;
}

.fine-print {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.65;
}

.section-heading {
  display: grid;
  grid-template-columns: 130px minmax(0, 1.35fr) minmax(240px, 0.65fr);
  gap: 32px;
  align-items: start;
  margin-bottom: 70px;
}

.section-heading.compact {
  margin-bottom: 54px;
}

.section-heading h2 {
  max-width: 660px;
  margin-bottom: 0;
  font-size: clamp(36px, 4.5vw, 60px);
  line-height: 1.13;
}

.section-heading > p:last-child {
  margin: 42px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.problem-card {
  position: relative;
  min-height: 276px;
  padding: 26px 24px 24px;
}

.problem-card + .problem-card {
  border-left: 1px solid var(--line-dark);
}

.problem-card::before {
  position: absolute;
  top: -1px;
  right: 0;
  left: 0;
  height: 5px;
  background: var(--rust);
  content: "";
  transform: scaleX(0.22);
  transform-origin: left;
}

.problem-code {
  display: block;
  margin-bottom: 58px;
  color: var(--rust);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.problem-card h3 {
  margin-bottom: 13px;
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 500;
}

.problem-card p {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.75;
}

.case-fact {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 36px;
  margin-top: 42px;
  padding: 30px 34px;
  border: 1px solid var(--line-dark);
  background: var(--white);
}

.case-fact-label {
  color: var(--green-deep);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.case-fact h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.case-fact p {
  max-width: 750px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  list-style: none;
}

.flow li {
  position: relative;
  display: flex;
  min-height: 178px;
  gap: 20px;
  padding: 28px 24px;
}

.flow li + li {
  border-left: 1px solid var(--line-dark);
}

.flow li:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -13px;
  display: grid;
  width: 26px;
  height: 26px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
  content: "→";
  font-size: 13px;
  place-items: center;
  transform: translateY(-50%);
}

.flow-step {
  color: var(--green-deep);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.flow strong,
.flow span:last-child {
  display: block;
}

.flow strong {
  margin-bottom: 12px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
}

.flow span:last-child {
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.6;
}

.decision-note {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 32px;
  margin-top: 34px;
}

.decision-note span {
  color: var(--green-deep);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.decision-note p {
  max-width: 720px;
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.65;
}

.comparison-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--ink);
}

.comparison-controls {
  display: none;
}

.js-ready .comparison-controls {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  padding: 10px 16px;
  border: 1px solid var(--ink);
  border-bottom: 0;
  background: var(--white);
}

.control-label {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.control-buttons {
  display: flex;
  gap: 4px;
}

.control-buttons button {
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 11px;
  font-weight: 650;
}

.control-buttons button:hover {
  border-color: var(--line-dark);
  color: var(--ink);
}

.control-buttons button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.comparison[data-active-view="before"] .comparison-panels,
.comparison[data-active-view="after"] .comparison-panels {
  grid-template-columns: minmax(0, 1fr);
}

.comparison[data-active-view="before"] .mock-panel,
.comparison[data-active-view="after"] .mock-panel {
  border-left: 0;
}

.comparison[data-active-view="before"] .browser-frame,
.comparison[data-active-view="after"] .browser-frame {
  max-width: 740px;
}

.mock-panel {
  min-width: 0;
  padding: clamp(22px, 3vw, 36px);
}

.mock-panel + .mock-panel {
  border-left: 1px solid var(--ink);
}

.before-panel {
  background: #eee5dc;
}

.after-panel {
  background: #e1e7de;
}

.panel-heading {
  display: flex;
  gap: 20px;
  align-items: start;
  justify-content: space-between;
  min-height: 98px;
}

.state-label {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.state-label-before {
  color: var(--rust);
}

.state-label-after {
  color: var(--green-deep);
}

.panel-heading h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(22px, 2vw, 29px);
  font-weight: 500;
}

.annotation {
  flex: none;
  padding: 3px 7px;
  border: 1px solid currentColor;
  color: var(--ink-soft);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.browser-frame {
  overflow: hidden;
  border: 1px solid #777268;
  background: var(--white);
  box-shadow: 0 16px 30px rgba(51, 43, 33, 0.11);
}

.browser-bar {
  display: flex;
  height: 28px;
  gap: 5px;
  align-items: center;
  padding: 0 10px;
  border-bottom: 1px solid #bdb7ad;
  background: #ded9d0;
}

.browser-bar i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #979188;
}

.browser-bar span {
  width: 48%;
  height: 7px;
  margin-left: 7px;
  background: #c8c2b8;
}

.mock-site {
  min-height: 338px;
  color: #2b2b28;
  font-family: var(--sans);
}

.mock-nav {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid #ddd7cc;
  font-size: 7px;
  letter-spacing: 0.04em;
}

.mock-nav b {
  font-size: 9px;
}

.mock-product {
  display: grid;
  grid-template-columns: 43% 57%;
  min-height: 240px;
}

.image-placeholder {
  display: grid;
  min-height: 240px;
  background: #d5d0c8;
  color: #8d887e;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  place-items: center;
}

.image-placeholder::before {
  position: absolute;
  width: 58px;
  height: 84px;
  border: 1px solid currentColor;
  content: "";
  transform: rotate(-7deg);
}

.image-placeholder {
  position: relative;
}

.image-placeholder span {
  position: relative;
  z-index: 1;
  padding: 4px;
  background: inherit;
}

.image-placeholder.resolved {
  background: #c4ccc1;
  color: #3f574a;
}

.image-placeholder.resolved::before {
  width: 74px;
  height: 104px;
  border-width: 2px 1px 1px 2px;
  transform: rotate(4deg);
}

.mock-copy {
  padding: 24px 18px 18px;
}

.mock-copy small {
  color: #777268;
  font-size: 7px;
  letter-spacing: 0.08em;
}

.mock-copy h4 {
  margin: 7px 0 8px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.2;
}

.mock-copy p {
  margin-bottom: 12px;
  color: #706c65;
  font-size: 8px;
  line-height: 1.6;
}

.mock-copy .mock-price {
  color: #34332f;
  font-size: 12px;
  font-weight: 700;
}

.mock-copy button {
  min-height: 28px;
  padding: 6px 12px;
  border: 0;
  background: #302f2b;
  color: #f6f1e7;
  font-size: 8px;
}

.mock-before .mock-copy button {
  width: 100%;
  background: #858077;
}

.mock-subtitle {
  padding-bottom: 8px;
  border-bottom: 1px solid #d0cabf;
}

.mock-status {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid #d0cabf;
  font-size: 7px;
}

.mock-status b {
  color: var(--green-deep);
}

.mock-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  color: #625f58;
  font-size: 7px;
}

.mock-actions button {
  background: var(--green-deep);
}

.mock-fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  min-height: 54px;
  border-top: 1px solid #ddd7cc;
}

.mock-fields span {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 7px 10px;
  color: #706c65;
  font-size: 7px;
}

.mock-fields span + span {
  border-left: 1px solid #ddd7cc;
}

.mock-fields b {
  font-family: var(--mono);
  font-size: 6px;
}

.panel-findings {
  display: grid;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.panel-findings li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 12px;
}

.panel-findings li::before {
  position: absolute;
  top: 0.65em;
  left: 0;
  width: 7px;
  height: 1px;
  background: currentColor;
  content: "";
}

.before-panel .panel-findings li::before {
  background: var(--rust);
}

.after-panel .panel-findings li::before {
  background: var(--green-deep);
}

.change-details {
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

.change-details details + details {
  border-top: 1px solid var(--line-dark);
}

.change-details summary {
  display: flex;
  gap: 20px;
  align-items: center;
  min-height: 66px;
  padding: 14px 24px;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 18px;
  list-style: none;
}

.change-details summary::-webkit-details-marker {
  display: none;
}

.change-details summary::after {
  margin-left: auto;
  color: var(--ink-soft);
  content: "+";
  font-family: var(--sans);
  font-size: 20px;
}

.change-details details[open] summary::after {
  content: "−";
}

.change-details summary span {
  color: var(--rust);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  background: var(--white);
}

.detail-grid p {
  margin: 0;
  padding: 24px;
  color: var(--ink-soft);
  font-size: 12px;
}

.detail-grid p + p {
  border-left: 1px solid var(--line);
}

.detail-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.work-ledger {
  border-top: 1px solid var(--ink);
}

.work-ledger article {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) 210px;
  gap: 32px;
  align-items: center;
  min-height: 142px;
  border-bottom: 1px solid var(--line-dark);
}

.ledger-number {
  color: var(--rust);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.work-ledger h3 {
  margin-bottom: 5px;
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 500;
}

.work-ledger p {
  max-width: 650px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.work-ledger article > strong {
  justify-self: end;
  color: var(--green-deep);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.evidence-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  border: 1px solid var(--ink);
}

.evidence-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.evidence-list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 74px;
  gap: 18px;
  align-items: center;
  min-height: 104px;
  padding: 18px 24px;
}

.evidence-list li + li {
  border-top: 1px solid var(--line-dark);
}

.evidence-list li > span {
  color: var(--green-deep);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
}

.evidence-list strong {
  display: block;
  margin-bottom: 3px;
  font-size: 14px;
}

.evidence-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 11px;
}

.evidence-list li > b {
  justify-self: end;
  padding: 3px 7px;
  border: 1px solid var(--green);
  color: var(--green-deep);
  font-size: 9px;
  letter-spacing: 0.06em;
}

.evidence-principle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 30px;
  border-left: 1px solid var(--ink);
  background: var(--green-deep);
  color: var(--white);
}

.stamp {
  display: grid;
  width: 116px;
  height: 116px;
  align-content: center;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.5;
  text-align: center;
  transform: rotate(-7deg);
}

.evidence-principle h3 {
  margin: 64px 0 16px;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.35;
}

.evidence-principle ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  list-style: none;
}

.evidence-principle li {
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--ink);
}

.scope-columns article {
  min-height: 400px;
  padding: clamp(28px, 4vw, 48px);
}

.scope-columns article + article {
  border-left: 1px solid var(--ink);
}

.scope-fit {
  background: var(--green-soft);
}

.scope-exclude {
  background: var(--rust-soft);
}

.scope-label {
  display: inline-block;
  margin-bottom: 80px;
  padding: 4px 8px;
  border: 1px solid currentColor;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.scope-fit .scope-label {
  color: var(--green-deep);
}

.scope-exclude .scope-label {
  color: var(--rust);
}

.scope-columns h3 {
  max-width: 430px;
  margin-bottom: 30px;
  font-family: var(--serif);
  font-size: clamp(27px, 3vw, 38px);
  font-weight: 500;
  line-height: 1.3;
}

.scope-columns ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  color: var(--ink-soft);
  font-size: 13px;
  list-style: none;
}

.scope-columns li {
  position: relative;
  padding: 9px 0 9px 20px;
  border-top: 1px solid rgba(65, 62, 55, 0.25);
}

.scope-columns li::before {
  position: absolute;
  top: 17px;
  left: 0;
  width: 8px;
  height: 1px;
  background: currentColor;
  content: "";
}

.case-closing {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) 220px;
  gap: 32px;
  align-items: end;
  padding: 82px 0 0;
}

.case-closing > p:nth-child(2) {
  max-width: 750px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(31px, 4vw, 51px);
  line-height: 1.28;
}

.case-closing small {
  color: var(--ink-soft);
  font-size: 10px;
  line-height: 1.65;
  text-align: right;
}

@media (max-width: 980px) {
  :root {
    --page: min(100% - 40px, 860px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
    padding-inline: 20px;
  }

  .section-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 52px minmax(0, 1fr);
    min-height: auto;
  }

  .hero-aside {
    grid-column: 2;
    max-width: 600px;
  }

  .section-heading {
    grid-template-columns: 92px minmax(0, 1fr);
  }

  .section-heading > p:last-child {
    grid-column: 2;
    max-width: 650px;
    margin-top: 0;
  }

  .problem-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .problem-card:nth-child(3) {
    border-left: 0;
  }

  .problem-card:nth-child(n + 3) {
    border-top: 1px solid var(--line-dark);
  }

  .flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow li:nth-child(3) {
    border-left: 0;
  }

  .flow li:nth-child(n + 3) {
    border-top: 1px solid var(--line-dark);
  }

  .flow li:nth-child(2)::after {
    display: none;
  }

  .comparison-panels {
    grid-template-columns: 1fr;
  }

  .mock-panel + .mock-panel {
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .mock-site {
    min-height: 380px;
  }

  .image-placeholder,
  .mock-product {
    min-height: 280px;
  }

  .mock-copy {
    padding: 34px 28px;
  }

  .mock-copy h4 {
    font-size: 23px;
  }

  .mock-copy p,
  .mock-copy small,
  .mock-status,
  .mock-actions,
  .mock-copy button,
  .mock-nav,
  .mock-fields span {
    font-size: 10px;
  }

  .work-ledger article {
    grid-template-columns: 60px minmax(0, 1fr) 160px;
  }

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

  .evidence-principle {
    min-height: 390px;
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .case-closing {
    grid-template-columns: 92px 1fr;
  }

  .case-closing small {
    grid-column: 2;
    text-align: left;
  }
}

@media (max-width: 620px) {
  :root {
    --page: calc(100% - 28px);
    --section-space: 78px;
  }

  body {
    font-size: 15px;
  }

  .site-header {
    min-height: 58px;
    padding-inline: 14px;
  }

  .case-mark span:last-child {
    display: none;
  }

  .delivery-note {
    font-size: 9px;
  }

  .hero {
    display: block;
    min-height: auto;
    padding-top: 74px;
  }

  .hero-index {
    margin-bottom: 30px;
    padding: 0;
    writing-mode: horizontal-tb;
  }

  h1 {
    margin-bottom: 26px;
    font-size: clamp(40px, 12vw, 54px);
  }

  .hero-title-lead {
    white-space: normal;
  }

  .hero-summary {
    margin-bottom: 36px;
    font-size: 16px;
  }

  .hero-meta dl {
    grid-template-columns: 1fr;
  }

  .hero-meta div,
  .hero-meta div + div {
    padding: 14px 0;
    border-left: 0;
  }

  .hero-meta div + div {
    border-top: 1px solid var(--line);
  }

  .hero-aside {
    margin-top: 50px;
  }

  .hero-aside blockquote {
    font-size: 23px;
  }

  .section-heading,
  .section-heading.compact {
    display: block;
    margin-bottom: 42px;
  }

  .section-number {
    margin-bottom: 30px;
  }

  .section-heading h2 {
    font-size: clamp(34px, 10vw, 46px);
  }

  .section-heading > p:last-child {
    margin-top: 24px;
  }

  .problem-grid,
  .flow {
    grid-template-columns: 1fr;
  }

  .problem-card {
    min-height: auto;
    padding: 25px 6px 28px;
  }

  .problem-card + .problem-card,
  .problem-card:nth-child(3) {
    border-top: 1px solid var(--line-dark);
    border-left: 0;
  }

  .problem-card::before {
    display: none;
  }

  .problem-code {
    margin-bottom: 28px;
  }

  .case-fact {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 24px;
  }

  .flow li {
    min-height: 134px;
    padding: 26px 8px;
  }

  .flow li + li,
  .flow li:nth-child(3) {
    border-top: 1px solid var(--line-dark);
    border-left: 0;
  }

  .flow li:not(:last-child)::after {
    top: auto;
    right: 18px;
    bottom: -13px;
    display: grid;
    transform: rotate(90deg);
  }

  .decision-note {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .decision-note p {
    font-size: 19px;
  }

  .mock-panel {
    padding: 18px;
  }

  .js-ready .comparison-controls {
    display: block;
    padding: 14px;
  }

  .control-label {
    display: block;
    margin-bottom: 10px;
  }

  .control-buttons {
    display: grid;
    grid-template-columns: 1fr;
  }

  .control-buttons button {
    width: 100%;
    min-height: 42px;
    text-align: left;
  }

  .panel-heading {
    min-height: 112px;
  }

  .annotation {
    font-size: 8px;
  }

  .mock-site {
    min-height: 0;
  }

  .mock-product {
    grid-template-columns: 1fr;
  }

  .image-placeholder {
    min-height: 190px;
  }

  .mock-copy {
    padding: 24px 18px;
  }

  .mock-copy h4 {
    font-size: 20px;
  }

  .mock-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .mock-actions button {
    width: 100%;
  }

  .mock-fields {
    grid-template-columns: 1fr;
  }

  .mock-fields span + span {
    border-top: 1px solid #ddd7cc;
    border-left: 0;
  }

  .mock-fields b {
    font-size: 8px;
  }

  .panel-findings li {
    font-size: 12px;
    line-height: 1.6;
  }

  .change-details summary {
    gap: 12px;
    min-height: 72px;
    padding: 13px 16px;
    font-size: 16px;
  }

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

  .detail-grid p + p {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .work-ledger article {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 18px;
    padding: 24px 0;
  }

  .work-ledger article > strong {
    grid-column: 2;
    justify-self: start;
  }

  .evidence-list li {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
    padding: 20px 14px;
  }

  .evidence-list li > b {
    grid-column: 2;
    justify-self: start;
  }

  .evidence-principle {
    min-height: 430px;
    padding: 26px;
  }

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

  .scope-columns article {
    min-height: 0;
    padding: 32px 24px 38px;
  }

  .scope-columns article + article {
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .scope-label {
    margin-bottom: 48px;
  }

  .case-closing {
    display: block;
    padding-top: 70px;
  }

  .case-closing > p:nth-child(2) {
    margin-bottom: 34px;
    font-size: 34px;
  }

  .case-closing small {
    text-align: left;
  }
}

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

@media print {
  .site-header,
  .skip-link {
    display: none;
  }

  .section-shell {
    width: 100%;
    break-inside: avoid;
  }

  .hero {
    min-height: auto;
  }
}