:root {
  color-scheme: light;
  --ink-strong: #172238;
  --ink: #34435f;
  --ink-muted: #74809a;
  --line: #dde4ee;
  --line-strong: #c8d2e1;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --surface-blue: #edf5ff;
  --blue: #2f6fed;
  --blue-strong: #1f56c2;
  --blue-dark: #163f91;
  --green: #16835d;
  --green-soft: #eaf8f2;
  --amber: #9a6211;
  --amber-soft: #fff6e6;
  --red: #c74545;
  --code: #121a2a;
  --code-muted: #9aa8c3;
  --shadow: 0 16px 46px rgba(24, 46, 84, 0.08);
  --sidebar-width: 330px;
  --radius-lg: 22px;
  --radius-md: 15px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--surface-soft);
  color: var(--ink);
  font-family:
    Pretendard,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(47, 111, 237, 0.3);
  outline-offset: 3px;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 9px 14px;
  border-radius: 8px;
  background: var(--ink-strong);
  color: #fff;
  text-decoration: none;
  transform: translateY(-140%);
  transition: transform 160ms ease;
}

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

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(221, 228, 238, 0.92);
  background: rgba(255, 255, 255, 0.92);
  padding: 12px 34px;
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-strong);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 13px;
  background: var(--ink-strong);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand small {
  margin-top: -2px;
  color: var(--ink-muted);
  font-size: 12px;
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 650;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(22, 131, 93, 0.1);
}

.meta-divider {
  width: 1px;
  height: 13px;
  background: var(--line-strong);
}

.workspace {
  display: grid;
  min-height: calc(100vh - 76px);
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 76px;
  align-self: start;
  height: calc(100vh - 76px);
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: var(--surface);
  padding: 34px 24px 26px;
}

.sidebar-heading {
  padding: 0 7px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.sidebar-heading h1 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.04em;
}

.sidebar-heading > p:last-child {
  margin: 8px 0 0;
  color: var(--ink-muted);
  font-size: 13px;
}

.issue-nav {
  display: grid;
  gap: 6px;
}

.issue-nav-button {
  position: relative;
  display: grid;
  width: 100%;
  grid-template-columns: 38px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 13px;
  background: transparent;
  padding: 12px 10px;
  text-align: left;
  cursor: pointer;
  transition:
    border-color 150ms ease,
    background 150ms ease,
    transform 150ms ease;
}

.issue-nav-button:hover {
  background: var(--surface-soft);
}

.issue-nav-button[aria-current="step"] {
  border-color: #cfe0fc;
  background: var(--surface-blue);
}

.issue-nav-number {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 800;
}

.issue-nav-button[aria-current="step"] .issue-nav-number {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.issue-nav-button.is-complete .issue-nav-number {
  border-color: var(--green);
  background: var(--green-soft);
  color: var(--green);
}

.issue-nav-copy strong,
.issue-nav-copy small {
  display: block;
}

.issue-nav-copy strong {
  overflow: hidden;
  color: var(--ink-strong);
  font-size: 13px;
  font-weight: 760;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.issue-nav-copy small {
  margin-top: 3px;
  color: var(--ink-muted);
  font-size: 11px;
}

.issue-nav-check {
  color: transparent;
  font-size: 15px;
  font-weight: 900;
}

.issue-nav-button.is-complete .issue-nav-check {
  color: var(--green);
}

.reset-button {
  width: 100%;
  margin-top: 17px;
  border: 0;
  background: transparent;
  padding: 8px;
  color: var(--ink-muted);
  font-size: 12px;
  cursor: pointer;
}

.reset-button:hover {
  color: var(--red);
}

.main-content {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 36px 48px 70px;
}

.baseline-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  margin-bottom: 26px;
  border: 1px solid #efd9a9;
  border-radius: var(--radius-md);
  background: var(--amber-soft);
  padding: 14px 18px;
}

.baseline-banner > div {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.banner-icon {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: #f7d687;
  color: #6e4609;
  font-size: 13px;
  font-weight: 900;
}

.baseline-banner strong {
  color: #624317;
  font-size: 13px;
}

.baseline-banner p {
  margin: 1px 0 0;
  color: #8a672f;
  font-size: 12px;
}

.baseline-banner code {
  color: #624317;
}

.issue-detail {
  animation: content-in 190ms ease-out;
}

@keyframes content-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.issue-hero {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.issue-hero-main {
  padding: 33px 34px 28px;
}

.issue-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin-bottom: 13px;
}

.tag {
  display: inline-flex;
  min-height: 25px;
  align-items: center;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1;
}

.tag-priority {
  background: var(--ink-strong);
  color: #fff;
}

.tag-owner {
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--ink-muted);
}

.tag-confidence {
  background: var(--green-soft);
  color: var(--green);
}

.tag-required {
  background: #e9f1ff;
  color: var(--blue-strong);
}

.tag-defense,
.tag-recommended {
  background: var(--amber-soft);
  color: var(--amber);
}

.tag-check {
  background: var(--green-soft);
  color: var(--green);
}

.issue-hero h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(27px, 3vw, 38px);
  line-height: 1.25;
  letter-spacing: -0.045em;
}

.issue-summary {
  max-width: 820px;
  margin: 13px 0 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
}

.cause-strip {
  display: grid;
  grid-template-columns: 105px minmax(0, 1fr);
  gap: 16px;
  border-top: 1px solid var(--line);
  background: #fbfcfe;
  padding: 20px 34px;
}

.cause-strip strong {
  color: var(--blue-strong);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.cause-strip p {
  margin: 0;
  color: var(--ink);
  font-size: 13px;
}

.principle-card {
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid #cfdbed;
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(24, 46, 84, 0.05);
}

.principle-header {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1.2fr);
  align-items: end;
  gap: 28px;
  border-bottom: 1px solid #dbe5f3;
  background:
    radial-gradient(circle at 100% 0%, rgba(93, 157, 255, 0.14), transparent 34%),
    #f3f7fd;
  padding: 25px 28px 23px;
}

.principle-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 8px;
  color: var(--blue-strong);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.principle-kicker > span {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 7px;
  background: var(--blue);
  color: #fff;
  font-family: Georgia, serif;
  font-size: 12px;
  font-style: italic;
  letter-spacing: 0;
}

.principle-header h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 20px;
  line-height: 1.4;
  letter-spacing: -0.03em;
}

.principle-header > p {
  margin: 0;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.7;
}

.principle-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(205px, 1fr));
  gap: 10px;
  margin: 0;
  padding: 18px;
  list-style: none;
  counter-reset: principle-step;
}

.principle-step {
  position: relative;
  min-height: 184px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbfcfe;
  padding: 16px;
}

.principle-step::before {
  position: absolute;
  top: 0;
  right: 16px;
  left: 16px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: #cbd6e6;
  content: "";
}

.principle-step.is-problem {
  border-color: #f0d3d3;
  background: #fffafa;
}

.principle-step.is-problem::before {
  background: #dc6a6a;
}

.principle-step.is-fixed {
  border-color: #c9e7d9;
  background: #f9fefa;
}

.principle-step.is-fixed::before {
  background: var(--green);
}

.principle-step-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 13px;
}

.principle-step-number {
  color: #9ca8bb;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
}

.principle-step-label {
  border-radius: 999px;
  background: #e9eef6;
  padding: 4px 8px;
  color: #62708a;
  font-size: 10px;
  font-weight: 800;
}

.principle-step.is-problem .principle-step-label {
  background: #faeaea;
  color: #a84949;
}

.principle-step.is-fixed .principle-step-label {
  background: var(--green-soft);
  color: var(--green);
}

.principle-step h4 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 14px;
  line-height: 1.45;
  letter-spacing: -0.02em;
}

.principle-step p {
  margin: 8px 0 0;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.65;
}

.principle-takeaway {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  margin: 0 18px 18px;
  border-radius: 13px;
  background: var(--ink-strong);
  padding: 15px 17px;
}

.principle-takeaway span {
  color: #8fb8ff;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.principle-takeaway p {
  margin: 0;
  color: #eef3fc;
  font-size: 13px;
  line-height: 1.65;
}

.principle-caution {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  margin: -7px 18px 18px;
  border: 1px solid #efd9a9;
  border-radius: 13px;
  background: var(--amber-soft);
  padding: 13px 16px;
}

.principle-caution strong {
  color: var(--amber);
  font-size: 11px;
}

.principle-caution p {
  margin: 0;
  color: #775522;
  font-size: 12px;
  line-height: 1.65;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin: 34px 2px 15px;
}

.section-heading h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 19px;
  letter-spacing: -0.025em;
}

.section-heading p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 12px;
}

.steps {
  display: grid;
  min-width: 0;
  gap: 16px;
}

.step-card {
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(24, 46, 84, 0.04);
}

.step-head {
  display: grid;
  min-width: 0;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 13px;
  padding: 22px 24px 17px;
}

.step-number {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 12px;
  background: var(--surface-blue);
  color: var(--blue-strong);
  font-size: 12px;
  font-weight: 850;
}

.step-title h4 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.step-title p {
  margin: 5px 0 0;
  color: var(--ink-muted);
  font-size: 12px;
}

.step-title {
  min-width: 0;
}

.step-meta {
  display: grid;
  min-width: 0;
  grid-column: 2 / -1;
  gap: 8px;
  margin-top: 2px;
}

.file-row,
.anchor-row {
  display: grid;
  min-width: 0;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  border-radius: 10px;
  background: var(--surface-soft);
  padding: 9px 11px;
}

.related-paths {
  min-width: 0;
  border-radius: 10px;
  background: var(--surface-soft);
  padding: 10px 11px;
}

.related-paths > .meta-label {
  display: block;
  margin-bottom: 6px;
}

.related-paths ul {
  display: grid;
  min-width: 0;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.related-paths li {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
}

.related-paths code {
  overflow: hidden;
  color: var(--ink-strong);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta-label {
  color: var(--ink-muted);
  font-size: 11px;
  font-weight: 750;
}

.file-row code,
.anchor-row code {
  overflow: hidden;
  color: var(--ink-strong);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.path-copy {
  border: 0;
  background: transparent;
  color: var(--blue-strong);
  padding: 2px 4px;
  font-size: 11px;
  font-weight: 750;
  cursor: pointer;
}

.instruction {
  margin: 0;
  border-top: 1px solid var(--line);
  padding: 17px 24px;
  color: var(--ink);
  font-size: 13px;
}

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

.code-panel {
  min-width: 0;
  margin: 0 16px 16px;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--code);
}

.code-toolbar {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 8px 10px 8px 16px;
}

.code-language {
  color: var(--code-muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.copy-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.07);
  color: #eaf0fc;
  padding: 7px 10px;
  font-size: 11px;
  font-weight: 750;
  cursor: pointer;
  transition: background 140ms ease;
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.13);
}

.copy-button.is-copied {
  border-color: rgba(71, 213, 157, 0.35);
  background: rgba(22, 131, 93, 0.24);
  color: #baf2dc;
}

.copy-icon {
  width: 13px;
  height: 13px;
}

.code-scroll {
  overflow: auto;
  max-height: 520px;
}

pre {
  margin: 0;
  padding: 18px 19px 21px;
  tab-size: 4;
}

pre code {
  color: #e4ebf7;
  font-size: 12px;
  line-height: 1.7;
  white-space: pre;
}

.note-card {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  margin: 0 24px 20px;
  border: 1px solid #d9e7fb;
  border-radius: 12px;
  background: var(--surface-blue);
  padding: 12px 14px;
  color: var(--blue-dark);
  font-size: 12px;
}

.note-card.warning {
  border-color: #efd9a9;
  background: var(--amber-soft);
  color: #7b551c;
}

.note-symbol {
  display: grid;
  width: 23px;
  height: 23px;
  place-items: center;
  border-radius: 50%;
  background: rgba(47, 111, 237, 0.12);
  font-size: 11px;
  font-weight: 900;
}

.warning .note-symbol {
  background: rgba(154, 98, 17, 0.12);
}

.note-card p {
  margin: 0;
}

.verification-card {
  margin-top: 18px;
  border: 1px solid #cfe9dd;
  border-radius: var(--radius-lg);
  background: #fbfffd;
  padding: 24px;
}

.verification-title {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 16px;
}

.verification-title span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 11px;
  background: var(--green-soft);
  color: var(--green);
  font-weight: 900;
}

.verification-title h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 17px;
}

.verification-title p {
  margin: 1px 0 0;
  color: var(--ink-muted);
  font-size: 12px;
}

.checklist {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  position: relative;
  padding-left: 25px;
  color: var(--ink);
  font-size: 13px;
}

.checklist li::before {
  position: absolute;
  top: 3px;
  left: 0;
  display: grid;
  width: 17px;
  height: 17px;
  place-items: center;
  border: 1px solid #add7c5;
  border-radius: 5px;
  color: var(--green);
  content: "✓";
  font-size: 10px;
  font-weight: 900;
}

.verification-command {
  margin-top: 18px;
}

.issue-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 24px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.action-group {
  display: flex;
  gap: 9px;
}

.action-button {
  min-height: 46px;
  border-radius: 12px;
  padding: 0 17px;
  font-size: 13px;
  font-weight: 780;
  cursor: pointer;
}

.action-button.secondary {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.action-button.secondary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.action-button.complete {
  border: 1px solid var(--green);
  background: var(--surface);
  color: var(--green);
}

.action-button.complete.is-complete {
  background: var(--green-soft);
}

.action-button.primary {
  border: 1px solid var(--blue);
  background: var(--blue);
  color: #fff;
  box-shadow: 0 8px 18px rgba(47, 111, 237, 0.2);
}

.action-button.primary:hover {
  background: var(--blue-strong);
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  max-width: min(360px, calc(100vw - 48px));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: var(--ink-strong);
  color: #fff;
  padding: 11px 15px;
  box-shadow: 0 14px 34px rgba(13, 24, 45, 0.24);
  font-size: 12px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

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

.noscript-message {
  position: fixed;
  inset: auto 20px 20px;
  z-index: 100;
  border-radius: 10px;
  background: var(--red);
  color: #fff;
  padding: 14px;
  text-align: center;
}

@media (max-width: 920px) {
  .topbar {
    padding-inline: 20px;
  }

  .workspace {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 24px 20px 18px;
  }

  .sidebar-heading,
  .reset-button {
    display: none;
  }

  .issue-nav {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 3px;
    scrollbar-width: thin;
  }

  .issue-nav-button {
    min-width: 220px;
    border-color: var(--line);
    background: var(--surface);
  }

  .main-content {
    padding: 28px 24px 58px;
  }
}

@media (max-width: 640px) {
  .topbar {
    min-height: 68px;
    padding: 10px 16px;
  }

  .topbar-meta {
    gap: 7px;
  }

  .topbar-meta .meta-divider,
  .topbar-meta span:last-child {
    display: none;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .workspace {
    min-height: calc(100vh - 68px);
  }

  .sidebar {
    padding: 15px 14px 12px;
  }

  .issue-nav-button {
    min-width: 200px;
  }

  .main-content {
    padding: 20px 14px 44px;
  }

  .baseline-banner {
    display: block;
    margin-bottom: 18px;
    padding: 13px 14px;
  }

  .baseline-banner > p {
    margin: 9px 0 0 42px;
  }

  .issue-hero-main {
    padding: 25px 20px 22px;
  }

  .issue-hero h2 {
    font-size: 27px;
  }

  .issue-summary {
    font-size: 14px;
  }

  .cause-strip {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 17px 20px;
  }

  .principle-header {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 10px;
    padding: 21px 19px 19px;
  }

  .principle-header h3 {
    font-size: 18px;
  }

  .principle-flow {
    grid-template-columns: 1fr;
    padding: 12px;
  }

  .principle-step {
    min-height: auto;
  }

  .principle-takeaway,
  .principle-caution {
    grid-template-columns: 1fr;
    gap: 4px;
    margin-right: 12px;
    margin-left: 12px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
    margin-top: 28px;
  }

  .step-head {
    grid-template-columns: 37px minmax(0, 1fr);
    padding: 19px 17px 15px;
  }

  .step-head > .tag {
    grid-column: 2;
    justify-self: start;
  }

  .step-meta {
    grid-column: 1 / -1;
  }

  .file-row,
  .anchor-row {
    grid-template-columns: 1fr auto;
  }

  .file-row .meta-label,
  .anchor-row .meta-label {
    grid-column: 1 / -1;
  }

  .instruction {
    padding-inline: 17px;
  }

  .code-panel {
    margin-inline: 10px;
  }

  pre {
    padding-inline: 15px;
  }

  .note-card {
    margin-inline: 17px;
  }

  .verification-card {
    padding: 20px 17px;
  }

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

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

  .action-button.complete {
    width: 100%;
  }
}

@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;
  }
}

.standalone-main {
  width: min(100%, 1180px);
}

.landing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 36px;
  overflow: hidden;
  border: 1px solid #d4e1f4;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 92% 12%, rgba(47, 111, 237, 0.17), transparent 34%),
    var(--surface);
  padding: 38px 40px;
  box-shadow: var(--shadow);
}

.landing-kicker {
  color: var(--blue);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.landing-hero h1 {
  max-width: 720px;
  margin: 8px 0 0;
  color: var(--ink-strong);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.2;
  letter-spacing: -0.05em;
}

.landing-hero p {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--ink);
  font-size: 15px;
}

.landing-count {
  display: grid;
  min-width: 132px;
  place-items: center;
  border: 1px solid #cfe0fc;
  border-radius: 18px;
  background: var(--surface-blue);
  padding: 18px 20px;
  color: var(--blue-dark);
}

.landing-count strong {
  font-size: 38px;
  line-height: 1;
}

.landing-count span {
  margin-top: 8px;
  font-size: 11px;
  font-weight: 760;
}

.issue-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.issue-link-card {
  display: flex;
  min-height: 280px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  padding: 23px;
  box-shadow: 0 8px 22px rgba(24, 46, 84, 0.04);
  transition:
    border-color 150ms ease,
    transform 150ms ease,
    box-shadow 150ms ease;
}

.issue-link-card:hover {
  border-color: #bfd4f5;
  box-shadow: 0 14px 30px rgba(24, 46, 84, 0.08);
  transform: translateY(-2px);
}

.issue-link-meta {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-muted);
  font-size: 11px;
  font-weight: 700;
}

.issue-link-card h2 {
  margin: 18px 0 0;
  color: var(--ink-strong);
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.03em;
}

.issue-link-card p {
  display: -webkit-box;
  overflow: hidden;
  margin: 10px 0 20px;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.65;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.issue-link-card > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  color: var(--blue-strong);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
}

.breadcrumb {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 9px;
  margin: 0 2px 15px;
  color: var(--ink-muted);
  font-size: 12px;
}

.breadcrumb a {
  color: var(--blue-strong);
  font-weight: 750;
  text-decoration: none;
}

.breadcrumb span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.issue-hero h1 {
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(27px, 3vw, 38px);
  line-height: 1.25;
  letter-spacing: -0.045em;
}

.principle-header h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 20px;
  line-height: 1.4;
  letter-spacing: -0.03em;
}

.principle-step h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 14px;
  line-height: 1.45;
  letter-spacing: -0.02em;
}

.section-heading h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 19px;
  letter-spacing: -0.025em;
}

.step-title h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.verification-title h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 17px;
}

.issue-link-actions {
  justify-content: flex-end;
}

.action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.not-found-card {
  display: grid;
  min-height: 420px;
  place-items: center;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 42px;
  text-align: center;
  box-shadow: var(--shadow);
}

.not-found-card > span {
  color: #b9c5d8;
  font-size: 54px;
  font-weight: 900;
  line-height: 1;
}

.not-found-card h1 {
  margin: 16px 0 0;
  color: var(--ink-strong);
  font-size: 25px;
}

.not-found-card p {
  margin: 8px 0 22px;
  color: var(--ink-muted);
  font-size: 13px;
}

@media (max-width: 960px) {
  .issue-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .landing-hero {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 20px;
    padding: 27px 21px;
  }

  .landing-hero h1 {
    font-size: 31px;
  }

  .landing-count {
    display: flex;
    min-width: 0;
    justify-content: center;
    gap: 10px;
    padding: 13px 16px;
  }

  .landing-count strong {
    font-size: 28px;
  }

  .landing-count span {
    margin: 0;
  }

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

  .issue-link-card {
    min-height: 245px;
  }

  .issue-hero h1 {
    font-size: 27px;
  }

  .principle-header h2 {
    font-size: 18px;
  }

  .issue-link-actions {
    flex-direction: column;
  }

  .issue-link-actions .action-button {
    width: 100%;
  }
}