:root {
  --paper: oklch(97.2% 0.014 82);
  --paper-raised: oklch(99% 0.008 82);
  --paper-muted: oklch(93.8% 0.022 79);
  --paper-pressed: oklch(90.5% 0.028 77);
  --ink: oklch(24% 0.034 249);
  --ink-muted: oklch(43% 0.027 249);
  --ink-faint: oklch(57% 0.021 249);
  --rule: oklch(81% 0.025 78);
  --rule-strong: oklch(62% 0.035 76);
  --brass: oklch(61% 0.105 76);
  --brass-deep: oklch(43% 0.09 72);
  --vermilion: oklch(54% 0.18 31);
  --vermilion-deep: oklch(39% 0.14 29);
  --green: oklch(48% 0.105 151);
  --green-paper: oklch(93% 0.038 151);
  --danger-paper: oklch(93% 0.045 32);
  --display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  --body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --shadow-sm: 0 1px 2px color-mix(in oklch, var(--ink) 10%, transparent);
  --shadow-md: 0 1.25rem 3rem color-mix(in oklch, var(--ink) 12%, transparent);
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-kerning: normal;
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-width: 20rem;
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg, transparent 0 47px, color-mix(in oklch, var(--ink) 2.6%, transparent) 47px 48px),
    repeating-linear-gradient(90deg, transparent 0 47px, color-mix(in oklch, var(--ink) 2.6%, transparent) 47px 48px);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.5;
  padding-bottom: env(safe-area-inset-bottom);
}

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

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

a {
  color: inherit;
}

code {
  font-family: var(--mono);
  font-size: 0.82em;
  font-variant-ligatures: none;
  overflow-wrap: anywhere;
}

::selection {
  background: var(--brass);
  color: var(--ink);
}

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

.skip-link {
  position: fixed;
  inset: var(--space-3) auto auto var(--space-3);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  transform: translateY(-200%);
}

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

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  width: 2.4rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid currentColor;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.eyebrow,
.panel-index {
  margin: 0;
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

/* Login */

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  overflow-x: hidden;
}

.login-shell {
  display: grid;
  width: min(100%, 72rem);
  min-height: min(42rem, calc(100vh - 2rem));
  overflow: hidden;
  border: 1px solid var(--ink);
  background: var(--paper-raised);
  box-shadow: var(--shadow-md);
}

.login-intro {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.5rem, 4vw, 3rem);
  background: var(--paper);
  isolation: isolate;
}

.login-intro::before {
  position: absolute;
  z-index: -1;
  right: -0.12em;
  bottom: -0.25em;
  content: "01";
  color: color-mix(in oklch, var(--ink) 4%, transparent);
  font-family: var(--display);
  font-size: clamp(11rem, 34vw, 28rem);
  font-weight: 800;
  letter-spacing: -0.12em;
  line-height: 0.8;
  pointer-events: none;
}

.login-masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.service-state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--ink-muted);
  font-size: 0.72rem;
  white-space: nowrap;
}

.service-state i {
  width: 0.45rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0.22rem var(--green-paper);
}

.login-copy {
  display: grid;
  max-width: 38rem;
  gap: var(--space-4);
  margin-block: auto;
}

.login-copy h1 {
  max-width: 14ch;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.35rem, 6vw, 3.65rem);
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 1.12;
}

.login-lede {
  max-width: 34rem;
  margin: 0;
  color: var(--ink-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.login-facts {
  display: grid;
  gap: 0;
  margin: 0;
  border-block: 1px solid var(--rule-strong);
}

.login-facts div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--rule);
}

.login-facts div:last-child {
  border-bottom: 0;
}

.login-facts dt {
  color: var(--ink-muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.login-facts dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.74rem;
}

.login-signature {
  margin: 0;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
}

.login-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border-top: 1px solid var(--ink);
  background: var(--paper-muted);
}

.login-panel-heading {
  display: grid;
  gap: var(--space-2);
}

.login-panel h2 {
  margin: var(--space-2) 0 0;
  font-family: var(--display);
  font-size: clamp(1.9rem, 6vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.login-panel-heading > p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.88rem;
}

.security-note {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-3);
  align-items: start;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--rule);
}

.security-note > span {
  padding: 0.2rem 0.3rem;
  border: 1px solid var(--rule-strong);
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.58rem;
  text-align: center;
}

.security-note p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.75rem;
  line-height: 1.65;
}

/* Forms and actions */

.stack-form {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.stack-form.compact {
  gap: var(--space-3);
  margin-top: var(--space-5);
}

label {
  display: grid;
  gap: var(--space-2);
}

label > span {
  color: var(--ink-muted);
  font-size: 0.74rem;
  font-weight: 750;
  letter-spacing: 0.045em;
}

input,
select,
textarea {
  width: 100%;
  min-height: 2.75rem;
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  background: var(--paper-raised);
  color: var(--ink);
  padding: 0.68rem 0.78rem;
  transition: border-color 140ms ease-out, box-shadow 140ms ease-out, background 140ms ease-out;
}

input:hover,
select:hover,
textarea:hover {
  border-color: var(--ink-muted);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--ink);
  background: var(--paper-raised);
  box-shadow: inset 3px 0 0 var(--brass);
  outline: 0;
}

input::placeholder,
textarea::placeholder {
  color: var(--ink-faint);
  opacity: 1;
}

textarea {
  min-height: 6rem;
  resize: vertical;
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.6;
}

select {
  cursor: pointer;
}

.field-pair {
  display: grid;
  gap: var(--space-3);
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  border: 1px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  padding: 0.68rem 1rem;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 150ms ease-out, color 150ms ease-out, transform 150ms ease-out, box-shadow 150ms ease-out;
}

.button.primary {
  justify-content: space-between;
  background: var(--ink);
  color: var(--paper);
}

.button.inverse {
  border-color: var(--paper);
  color: var(--paper);
}

.button.caution {
  border-color: var(--vermilion-deep);
  color: var(--vermilion-deep);
}

.button.wide {
  width: 100%;
}

.button:active {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.text-button,
.state-button {
  min-height: 2.25rem;
  border: 0;
  background: none;
  color: var(--ink);
  padding: 0.45rem 0.2rem;
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--rule-strong);
  text-underline-offset: 0.24rem;
  cursor: pointer;
}

.text-button.consequential {
  color: var(--vermilion-deep);
}

/* Console shell */

.console-layout {
  min-height: 100vh;
}

.rail {
  position: sticky;
  z-index: 30;
  top: 0;
  display: flex;
  width: 100%;
  align-items: center;
  gap: var(--space-4);
  overflow-x: auto;
  border-bottom: 1px solid color-mix(in oklch, var(--paper) 22%, var(--ink));
  background: var(--ink);
  color: var(--paper);
  padding: max(0.7rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) 0.7rem max(1rem, env(safe-area-inset-left));
  scrollbar-width: none;
}

.rail::-webkit-scrollbar {
  display: none;
}

.rail-brand {
  flex: 0 0 auto;
}

.rail-brand .brand-mark {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--ink);
}

.rail-state,
.rail-foot {
  display: none;
}

.status-dot {
  display: inline-block;
  width: 0.48rem;
  aspect-ratio: 1;
  margin-right: var(--space-2);
  border-radius: 50%;
}

.status-dot.live {
  background: oklch(76% 0.13 151);
  box-shadow: 0 0 0 0.22rem color-mix(in oklch, oklch(76% 0.13 151) 18%, transparent);
}

.rail nav {
  display: flex;
  min-width: max-content;
  margin-left: auto;
}

.rail nav a {
  display: grid;
  min-height: 2.5rem;
  grid-template-columns: auto;
  place-items: center;
  border-bottom: 2px solid transparent;
  color: color-mix(in oklch, var(--paper) 68%, var(--ink));
  padding: 0.5rem 0.72rem;
  font-size: 0;
  text-decoration: none;
  transition: color 140ms ease-out, border-color 140ms ease-out;
}

.rail nav a span {
  font-family: var(--mono);
  font-size: 0.68rem;
}

.rail nav a.active,
.rail nav a[aria-current="location"] {
  border-color: var(--brass);
  color: var(--paper);
}

.console-main {
  min-width: 0;
  width: min(100%, 100rem);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 4rem) var(--space-8);
}

.chapter {
  scroll-margin-top: 5rem;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  border-bottom: 1px solid var(--ink);
}

.chapter-heading {
  display: grid;
  gap: var(--space-3);
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.chapter-heading > div {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.chapter-heading > p {
  max-width: 42rem;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.84rem;
}

.chapter-no {
  color: var(--vermilion);
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.hero-chapter {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.hero-copy {
  display: grid;
  gap: var(--space-5);
  align-items: end;
}

.hero-copy h1 {
  max-width: 15ch;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 750;
  letter-spacing: -0.06em;
  line-height: 1.04;
}

.hero-copy h1 em {
  color: var(--vermilion-deep);
  font-style: normal;
}

.hero-copy p {
  max-width: 36rem;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(2rem, 5vw, 3.5rem);
  border: 1px solid var(--rule-strong);
  background: var(--paper-raised);
}

.signal-strip div {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.signal-strip div:nth-child(2n) {
  border-right: 0;
}

.signal-strip div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.signal-strip span {
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
}

.signal-strip strong {
  font-family: var(--display);
  font-size: 1.45rem;
  font-variant-numeric: tabular-nums;
}

.endpoint-band {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--rule);
  font-size: 0.72rem;
}

.endpoint-band > span {
  color: var(--ink-muted);
  font-family: var(--mono);
  letter-spacing: 0.08em;
}

.endpoint-band code {
  color: var(--ink-muted);
}

.endpoint-band a {
  font-weight: 750;
  text-underline-offset: 0.22rem;
}

/* Operational records */

.split-grid {
  display: grid;
  gap: var(--space-7);
  align-items: start;
}

.records,
.route-table,
.audit-table {
  min-width: 0;
  border-top: 1px solid var(--ink);
}

.record-row {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--rule);
}

.record-main {
  display: grid;
  min-width: 0;
  grid-template-columns: 4.4rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: center;
}

.record-main h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
}

.record-main code {
  display: block;
  max-width: 44rem;
  overflow: hidden;
  color: var(--ink-muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.provider-stamp {
  justify-self: start;
  border: 1px solid currentColor;
  color: var(--ink-muted);
  padding: 0.2rem 0.34rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
}

.record-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--mono);
  font-size: 0.68rem;
  white-space: nowrap;
}

.state::before {
  width: 0.42rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.state.enabled,
.state-button.enabled {
  color: var(--green);
}

.state.disabled,
.state-button.disabled {
  color: var(--vermilion-deep);
}

.state-button {
  white-space: nowrap;
}

.editor {
  padding: var(--space-5);
  border: 1px solid var(--rule-strong);
  border-top: 3px solid var(--ink);
  background: var(--paper-muted);
  box-shadow: var(--shadow-sm);
}

.editor > summary {
  display: flex;
  min-height: 2rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.editor > summary span {
  display: grid;
  width: 1.5rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--rule-strong);
  font-family: var(--body);
  font-size: 1rem;
  font-weight: 400;
  transition: transform 160ms ease-out;
}

.editor[open] > summary span {
  transform: rotate(45deg);
}

.editor h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.05rem;
}

.advanced {
  padding-top: var(--space-3);
  border-top: 1px solid var(--rule);
}

.advanced summary {
  min-height: 2.5rem;
  color: var(--ink-muted);
  font-size: 0.75rem;
  cursor: pointer;
}

.advanced label {
  margin-top: var(--space-3);
}

.empty-state {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-7) var(--space-4);
  border-bottom: 1px solid var(--rule);
  background: color-mix(in oklch, var(--paper-muted) 56%, var(--paper));
  text-align: center;
}

.empty-state strong {
  font-family: var(--display);
  font-size: 1.15rem;
}

.empty-state span {
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.route-head,
.audit-head {
  display: none;
}

.route-row,
.audit-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-2) var(--space-4);
  align-items: center;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--rule);
}

.route-row > :nth-child(2),
.route-row > :nth-child(3),
.audit-row > :nth-child(2),
.audit-row > :nth-child(3) {
  grid-column: 1 / -1;
}

.route-row > small,
.audit-row code,
.audit-row small {
  color: var(--ink-muted);
}

.risk-chapter {
  position: relative;
}

.risk-note {
  display: grid;
  gap: var(--space-2);
  margin: -0.75rem 0 var(--space-6);
  padding: var(--space-4);
  border: 1px solid var(--vermilion);
  background: var(--danger-paper);
  color: var(--vermilion-deep);
}

.risk-note strong {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.risk-note p {
  margin: 0;
  font-size: 0.84rem;
}

.builtin-row {
  padding-inline: var(--space-3);
  background: var(--green-paper);
}

.secret-reveal {
  position: sticky;
  z-index: 25;
  top: 4.5rem;
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  box-shadow: 0.35rem 0.35rem 0 var(--vermilion);
}

.secret-reveal .panel-index {
  display: block;
  color: color-mix(in oklch, var(--paper) 72%, var(--ink));
}

.secret-reveal code {
  padding: var(--space-3);
  border: 1px solid color-mix(in oklch, var(--paper) 25%, var(--ink));
  background: color-mix(in oklch, var(--paper) 9%, var(--ink));
}

.notice {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--rule-strong);
  background: var(--paper-muted);
  font-size: 0.84rem;
}

.notice.success {
  border-color: var(--green);
  background: var(--green-paper);
  color: var(--green);
}

.notice.warning {
  border-color: var(--brass-deep);
  color: var(--brass-deep);
}

.notice.danger {
  border-color: var(--vermilion);
  background: var(--danger-paper);
  color: var(--vermilion-deep);
}

.audit-row > div {
  display: grid;
}

.audit-row time,
.audit-row span,
.audit-row small {
  font-size: 0.77rem;
}

@media (hover: hover) and (pointer: fine) {
  .button:hover {
    box-shadow: 0.22rem 0.22rem 0 var(--brass);
    transform: translate(-1px, -1px);
  }

  .button.primary:hover {
    background: var(--ink-muted);
  }

  .text-button:hover,
  .state-button:hover,
  .endpoint-band a:hover {
    text-decoration-color: currentColor;
  }

  .rail nav a:hover {
    color: var(--paper);
  }

  .record-row:hover,
  .route-row:hover,
  .audit-row:hover {
    background: color-mix(in oklch, var(--paper-muted) 62%, transparent);
  }
}

@media (min-width: 42rem) {
  .field-pair {
    grid-template-columns: 1fr 1fr;
  }

  .chapter-heading {
    grid-template-columns: minmax(0, 1fr) minmax(16rem, 0.8fr);
    align-items: baseline;
  }

  .chapter-heading > p {
    justify-self: end;
    text-align: right;
  }

  .hero-copy {
    grid-template-columns: minmax(0, 1.45fr) minmax(16rem, 0.55fr);
    gap: clamp(2rem, 6vw, 5rem);
  }

  .signal-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .signal-strip div,
  .signal-strip div:nth-child(2n) {
    border-right: 1px solid var(--rule);
    border-bottom: 0;
  }

  .signal-strip div:last-child {
    border-right: 0;
  }

  .endpoint-band {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-4);
  }

  .record-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .record-actions {
    justify-content: flex-end;
  }

  .route-head,
  .route-row {
    display: grid;
    grid-template-columns: 1.05fr 1.7fr 1fr auto;
    gap: var(--space-4);
    align-items: center;
  }

  .route-head,
  .audit-head {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--rule-strong);
    color: var(--ink-muted);
    font-family: var(--mono);
    font-size: 0.61rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
  }

  .route-row > :nth-child(2),
  .route-row > :nth-child(3),
  .audit-row > :nth-child(2),
  .audit-row > :nth-child(3) {
    grid-column: auto;
  }

  .audit-head,
  .audit-row {
    display: grid;
    grid-template-columns: 1.35fr 1.2fr 1.45fr 0.65fr 0.55fr;
    gap: var(--space-4);
    align-items: center;
  }

  .risk-note {
    grid-template-columns: 8rem 1fr;
    gap: var(--space-4);
  }

  .secret-reveal {
    grid-template-columns: 1fr minmax(12rem, 1.4fr) auto;
    align-items: center;
  }
}

@media (min-width: 54rem) {
  .login-shell {
    grid-template-columns: minmax(0, 1.25fr) minmax(22rem, 0.75fr);
  }

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

  .login-facts {
    grid-template-columns: repeat(3, 1fr);
  }

  .login-facts div {
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding-inline: var(--space-4);
    border-right: 1px solid var(--rule);
    border-bottom: 0;
  }

  .login-facts div:first-child {
    padding-left: 0;
  }

  .login-facts div:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .console-layout {
    display: grid;
    grid-template-columns: 13.5rem minmax(0, 1fr);
  }

  .rail {
    position: sticky;
    top: 0;
    display: flex;
    width: auto;
    height: 100vh;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: hidden;
    border-right: 1px solid color-mix(in oklch, var(--paper) 20%, var(--ink));
    border-bottom: 0;
    padding: 1.35rem 1.15rem;
  }

  .rail-state {
    display: block;
    margin: var(--space-6) 0 var(--space-7);
    padding-top: var(--space-4);
    border-top: 1px solid color-mix(in oklch, var(--paper) 18%, var(--ink));
    color: color-mix(in oklch, var(--paper) 72%, var(--ink));
    font-size: 0.7rem;
  }

  .rail nav {
    display: grid;
    min-width: 0;
    margin: 0;
  }

  .rail nav a {
    display: grid;
    min-height: 2.8rem;
    grid-template-columns: 2.25rem minmax(0, 1fr);
    place-items: center start;
    border-bottom: 1px solid color-mix(in oklch, var(--paper) 10%, var(--ink));
    border-left: 2px solid transparent;
    padding: 0.58rem 0.35rem;
    font-size: 0.78rem;
  }

  .rail nav a.active,
  .rail nav a[aria-current="location"] {
    border-bottom-color: color-mix(in oklch, var(--paper) 10%, var(--ink));
    border-left-color: var(--brass);
    padding-left: 0.65rem;
  }

  .rail-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    color: color-mix(in oklch, var(--paper) 65%, var(--ink));
    font-family: var(--mono);
    font-size: 0.68rem;
  }

  .rail .text-button {
    color: var(--paper);
  }

  .chapter {
    scroll-margin-top: 1rem;
  }

  .secret-reveal {
    top: 1rem;
  }
}

@media (min-width: 68rem) {
  .split-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(19rem, 0.7fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }

  .editor {
    position: sticky;
    top: 1.5rem;
  }
}

@media (pointer: coarse) {
  .button,
  .text-button,
  .state-button,
  .rail nav a,
  summary {
    min-height: 2.75rem;
  }
}

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