:root {
  --c-deep: #0A1A2A;
  --c-panel: #10263A;
  --c-raised: #16324B;
  --c-paper: #F1F5F8;
  --c-scale: #9FB3C4;
  --c-amber: #F2A33C;
  --c-amber-deep: #C97A1E;
  --c-jade: #2FBF9B;
  --c-cyan: #59E3D0;
  --c-alert: #D2564A;
  --c-sand: #E8EDF1;
  --line-color: rgba(159, 179, 196, 0.26);
  --glass: rgba(16, 38, 58, 0.72);
  --glass-strong: rgba(16, 38, 58, 0.9);
  --focus-ring: 0 0 0 3px rgba(89, 227, 208, 0.34);
  --shadow-panel: 0 18px 48px rgba(0, 0, 0, 0.22);
  --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shell-max: 1440px;
  --shell-pad: clamp(16px, 3vw, 48px);
  --shell: min(100% - (var(--shell-pad) * 2), var(--shell-max));
  --radius: 4px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--c-paper);
  background-color: var(--c-deep);
  background-image:
    linear-gradient(rgba(159, 179, 196, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 179, 196, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.6em;
  color: var(--c-paper);
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.75rem);
  font-weight: 700;
}

h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
  max-width: 72ch;
}

a {
  color: var(--c-cyan);
  text-decoration: none;
  text-underline-offset: 3px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

a:hover {
  color: var(--c-paper);
  text-decoration: underline;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

button {
  cursor: pointer;
  border: 0;
  background: none;
}

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.muted {
  color: var(--c-scale);
}

.accent-amber {
  color: var(--c-amber);
}

.accent-jade {
  color: var(--c-jade);
}

.accent-cyan {
  color: var(--c-cyan);
}

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

.u-hidden {
  display: none !important;
}

.page-shell {
  width: var(--shell);
  margin-inline: auto;
}

.content-wrap {
  width: min(100%, 980px);
  margin-inline: auto;
}

.section {
  padding-block: clamp(48px, 8vw, 96px);
}

.section--tight {
  padding-block: clamp(28px, 5vw, 56px);
}

.section--flush {
  padding-block: 0;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 32px);
}

.grid-12__aside {
  grid-column: 1 / span 3;
}

.grid-12__main {
  grid-column: 4 / span 9;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.chapter-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding: 10px 0;
  border-top: 1px solid var(--line-color);
  border-bottom: 1px solid var(--line-color);
}

.chapter-head__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  min-height: 24px;
  padding: 2px 6px;
  border: 1px solid var(--c-amber);
  border-radius: 2px;
  color: var(--c-amber);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
}

.chapter-head__title {
  flex: 1;
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 700;
}

.breadcrumb {
  margin: 18px 0 0;
  color: var(--c-scale);
  font-size: 13px;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb__link {
  color: var(--c-scale);
}

.breadcrumb__link:hover {
  color: var(--c-cyan);
}

.breadcrumb__sep {
  color: var(--c-scale);
  opacity: 0.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line-color);
  border-radius: 2px;
  background: var(--c-raised);
  color: var(--c-paper);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.btn:hover {
  background: #1b3b57;
  border-color: var(--c-scale);
  color: var(--c-paper);
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: var(--c-deep);
}

.btn--primary:hover {
  background: var(--c-amber-deep);
  border-color: var(--c-amber-deep);
  color: var(--c-deep);
}

.btn--jade {
  background: var(--c-jade);
  border-color: var(--c-jade);
  color: var(--c-deep);
}

.btn--jade:hover {
  background: #25a687;
  border-color: #25a687;
  color: var(--c-deep);
}

.btn--ghost {
  background: transparent;
  border-color: var(--c-scale);
  color: var(--c-paper);
}

.btn--ghost:hover {
  background: rgba(159, 179, 196, 0.12);
  border-color: var(--c-cyan);
}

.btn--quiet {
  min-height: 32px;
  padding-inline: 8px;
  background: transparent;
  border-color: transparent;
  color: var(--c-cyan);
}

.btn--quiet:hover {
  background: rgba(89, 227, 208, 0.08);
  border-color: transparent;
  color: var(--c-paper);
}

.btn--small {
  min-height: 32px;
  padding: 0 10px;
  font-size: 13px;
}

.panel {
  background: var(--c-panel);
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.panel--solid {
  background: var(--c-panel);
}

.panel--glass {
  background: var(--glass);
  border-color: rgba(159, 179, 196, 0.32);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.panel__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-color);
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--c-raised);
}

.panel__body {
  padding: clamp(16px, 2vw, 24px);
}

.panel__foot {
  padding: 12px 16px;
  border-top: 1px solid var(--line-color);
  color: var(--c-scale);
  font-size: 13px;
}

.panel__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.data-block {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-color);
}

.data-block:last-child {
  border-bottom: 0;
}

.data-block__title {
  color: var(--c-scale);
  font-size: 13px;
}

.data-block__value {
  color: var(--c-amber);
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.data-block__batch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: max-content;
  padding: 2px 6px;
  border: 1px solid var(--c-amber);
  border-radius: 2px;
  color: var(--c-amber);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
}

.data-block__note {
  color: var(--c-scale);
  font-size: 13px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border: 1px solid currentColor;
  border-radius: 2px;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  white-space: nowrap;
}

.status-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status-badge--active {
  color: var(--c-amber);
}

.status-badge--done {
  color: var(--c-jade);
}

.status-badge--pending {
  color: var(--c-scale);
}

.status-badge--alert {
  color: var(--c-alert);
}

.status-badge--info {
  color: var(--c-cyan);
}

.status-badge--batch {
  color: var(--c-amber-deep);
}

.status-badge--solid-active {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: var(--c-deep);
}

.status-badge--solid-done {
  background: var(--c-jade);
  border-color: var(--c-jade);
  color: var(--c-deep);
}

.status-badge--solid-pending {
  background: var(--c-scale);
  border-color: var(--c-scale);
  color: var(--c-deep);
}

.status-badge--solid-alert {
  background: var(--c-alert);
  border-color: var(--c-alert);
  color: var(--c-deep);
}

.status-badge--solid-info {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-deep);
}

.status-badge--solid-batch {
  background: var(--c-amber-deep);
  border-color: var(--c-amber-deep);
  color: var(--c-deep);
}

.batch-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 6px;
  border: 1px solid var(--c-amber);
  border-radius: 2px;
  background: rgba(242, 163, 60, 0.06);
  color: var(--c-amber);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
}

.batch-tag__label {
  color: var(--c-scale);
  font-family: var(--font-body);
  font-size: 12px;
}

.batch-tag__code {
  color: var(--c-amber);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--c-panel);
  font-size: 14px;
}

.data-table caption {
  padding: 10px 12px;
  color: var(--c-scale);
  text-align: left;
  font-size: 13px;
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-color);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--c-raised);
  color: var(--c-paper);
  font-size: 13px;
  font-weight: 700;
}

.data-table tbody tr:nth-child(even) {
  background: rgba(232, 237, 241, 0.035);
}

.data-table tbody tr:hover {
  background: rgba(89, 227, 208, 0.07);
}

.data-table__num {
  color: var(--c-amber);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.disclosure {
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  background: var(--c-panel);
}

.disclosure + .disclosure {
  margin-top: 8px;
}

.disclosure__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.disclosure__summary::-webkit-details-marker {
  display: none;
}

.disclosure__summary::before {
  content: "+";
  width: 16px;
  color: var(--c-cyan);
  font-family: var(--font-mono);
}

.disclosure[open] .disclosure__summary::before {
  content: "−";
}

.disclosure__body {
  padding: 0 14px 14px 40px;
  color: var(--c-scale);
  font-size: 14px;
}

.disclosure__body p:first-child {
  margin-top: 0;
}

.tab-set {
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  background: var(--c-panel);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 6px;
  border-bottom: 1px solid var(--line-color);
  background: var(--c-raised);
}

.tab-button {
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--c-scale);
  font-size: 13px;
}

.tab-button:hover {
  background: rgba(159, 179, 196, 0.1);
  color: var(--c-paper);
}

.tab-button[aria-selected="true"] {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: var(--c-deep);
  font-weight: 700;
}

.tab-panel {
  padding: 16px;
}

.tab-panel[hidden] {
  display: none;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line-color);
  border-radius: 2px;
  background: transparent;
  color: var(--c-scale);
  font-size: 13px;
}

.filter-chip:hover {
  border-color: var(--c-scale);
  color: var(--c-paper);
}

.filter-chip[aria-pressed="true"] {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-deep);
  font-weight: 700;
}

.figure {
  display: grid;
  gap: 8px;
  margin: 0;
}

.figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--c-raised), var(--c-panel));
}

.figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__media--portrait {
  aspect-ratio: 4 / 5;
}

.figure__media--square {
  aspect-ratio: 1;
}

.figure__media--wide {
  aspect-ratio: 21 / 9;
}

.figure__caption {
  color: var(--c-scale);
  font-size: 13px;
  line-height: 1.6;
}

.figure--bleed {
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
}

.figure--offset {
  transform: translateY(-16px);
}

.framed-hero {
  position: relative;
  overflow: hidden;
  min-height: clamp(420px, 68vh, 760px);
  padding: clamp(28px, 5vw, 64px);
  border: 1px solid var(--line-color);
  background: var(--c-panel);
}

.framed-hero::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed rgba(159, 179, 196, 0.26);
  pointer-events: none;
}

.framed-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(89, 227, 208, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(89, 227, 208, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.55;
  pointer-events: none;
}

.framed-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.framed-hero__kicker {
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.framed-hero__title {
  margin: 12px 0 16px;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.framed-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.framed-hero__tick {
  position: absolute;
  top: 24px;
  right: 24px;
  bottom: 24px;
  width: 1px;
  background: repeating-linear-gradient(180deg, var(--c-scale) 0 1px, transparent 1px 12px);
  opacity: 0.5;
}

.progress-axis {
  position: fixed;
  top: 128px;
  bottom: 80px;
  left: max(16px, calc((100vw - var(--shell-max)) / 2));
  z-index: 40;
  display: flex;
  flex-direction: column;
  width: 64px;
  pointer-events: none;
}

.progress-axis__rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 1px;
  background: var(--c-raised);
}

.progress-axis__step {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 0;
  color: var(--c-scale);
  pointer-events: auto;
}

.progress-axis__index {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: var(--c-deep);
  color: inherit;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 22px;
  text-align: center;
}

.progress-axis__label {
  color: inherit;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.progress-axis__step:hover .progress-axis__label,
.progress-axis__step:focus-visible .progress-axis__label,
.progress-axis__step.is-active .progress-axis__label {
  opacity: 1;
  transform: translateX(0);
}

.progress-axis__step.is-active {
  color: var(--c-cyan);
}

.progress-axis__step.is-active .progress-axis__index {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-deep);
}

.log-list {
  display: grid;
  gap: 0;
}

.log-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-color);
}

.log-item__marker {
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
}

.log-item__time {
  color: var(--c-scale);
  font-family: var(--font-mono);
  font-size: 12px;
}

.log-item__body {
  color: var(--c-paper);
  font-size: 14px;
}

.log-item__body strong {
  color: var(--c-amber);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line-color);
  background: rgba(10, 26, 42, 0.92);
  color: var(--c-paper);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 10px 14px;
  border: 1px solid var(--c-cyan);
  border-radius: 2px;
  background: var(--c-deep);
  color: var(--c-cyan);
  font-size: 14px;
}

.skip-link:focus {
  top: 12px;
}

.header-shell {
  display: flex;
  align-items: center;
  gap: 24px;
  width: var(--shell);
  min-height: 72px;
  margin-inline: auto;
}

.brand-lockup {
  display: flex;
  flex-shrink: 0;
  align-items: baseline;
  gap: 10px;
}

.brand-link {
  color: var(--c-paper);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-link:hover {
  color: var(--c-paper);
  text-decoration: none;
}

.brand-version {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border: 1px solid var(--c-amber);
  border-radius: 2px;
  background: rgba(242, 163, 60, 0.08);
  color: var(--c-amber);
  font-size: 12px;
  line-height: 1.4;
}

.site-nav {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: space-between;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__list--left {
  margin-left: 4px;
}

.site-nav__list--right {
  margin-left: auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 2px;
  color: #d6e2ec;
  font-size: 14px;
  line-height: 1.2;
  text-decoration: none;
}

.nav-link:hover {
  border-color: var(--line-color);
  background: var(--c-raised);
  color: var(--c-paper);
  text-decoration: none;
}

.nav-link:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.nav-link[aria-current="page"] {
  border-color: var(--c-cyan);
  background: var(--c-cyan);
  color: var(--c-deep);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  flex-shrink: 0;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line-color);
  border-radius: 2px;
  background: var(--c-raised);
  color: var(--c-paper);
  font-size: 13px;
}

.nav-toggle:hover {
  border-color: var(--c-scale);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.nav-toggle__label {
  white-space: nowrap;
}

.nav-toggle__lines {
  position: relative;
  display: inline-block;
  width: 18px;
  height: 12px;
}

.nav-toggle__lines::before,
.nav-toggle__lines::after {
  content: "";
  position: absolute;
  right: 0;
  left: 0;
  height: 1px;
  background: var(--c-cyan);
  transition: top 0.16s var(--ease), bottom 0.16s var(--ease), transform 0.16s var(--ease);
}

.nav-toggle__lines::before {
  top: 2px;
}

.nav-toggle__lines::after {
  bottom: 2px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__lines::before {
  top: 5px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__lines::after {
  bottom: 5px;
  transform: rotate(-45deg);
}

.header-meter {
  display: flex;
  align-items: center;
  gap: 8px;
  width: var(--shell);
  height: 20px;
  margin-inline: auto;
}

.header-meter__rule {
  flex: 1;
  height: 8px;
  border-bottom: 1px solid var(--line-color);
  background: repeating-linear-gradient(90deg, var(--c-raised) 0 1px, transparent 1px 12px);
}

.header-meter__label {
  color: var(--c-scale);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.header-meter__value {
  color: var(--c-cyan);
  font-size: 11px;
}

.site-footer {
  border-top: 1px solid var(--line-color);
  background: var(--c-deep);
  color: var(--c-paper);
}

.footer-status {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  width: var(--shell);
  margin-inline: auto;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-color);
}

.footer-status__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-scale);
  font-size: 13px;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-scale);
}

.status-dot--amber {
  background: var(--c-amber);
}

.status-dot--jade {
  background: var(--c-jade);
}

.status-dot--cyan {
  background: var(--c-cyan);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(2, minmax(0, 1fr)) 1.4fr;
  gap: 32px;
  width: var(--shell);
  margin-inline: auto;
  padding: 38px 0;
}

.footer-col {
  min-width: 0;
}

.footer-col--brand {
  max-width: 360px;
}

.footer-col--contact {
  max-width: 420px;
}

.footer-brand {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--c-paper);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.2;
  text-decoration: none;
}

.footer-brand:hover {
  color: var(--c-paper);
  text-decoration: none;
}

.footer-heading {
  margin: 0 0 12px;
  color: var(--c-amber);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

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

.footer-list a {
  color: #cfdbe6;
  font-size: 14px;
  text-decoration: none;
}

.footer-list a:hover {
  color: var(--c-cyan);
  text-decoration: underline;
}

.footer-note {
  margin: 0;
  color: var(--c-scale);
  font-size: 13px;
  line-height: 1.7;
}

.footer-contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--c-scale);
  font-size: 13px;
  line-height: 1.7;
}

.footer-contact-line .mono {
  color: var(--c-paper);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: var(--shell);
  margin-inline: auto;
  padding: 16px 0 28px;
  border-top: 1px solid var(--line-color);
  color: var(--c-scale);
  font-size: 12px;
}

@media (max-width: 1100px) {
  .progress-axis {
    display: none;
  }
}

@media (max-width: 1024px) {
  .grid-12__aside,
  .grid-12__main {
    grid-column: 1 / -1;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.2fr repeat(2, minmax(0, 1fr));
  }

  .footer-col--contact {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  .header-shell {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 0;
  }

  .brand-lockup {
    flex: 1;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    order: 3;
    display: none;
    flex: 0 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    width: 100%;
    padding: 8px 0 12px;
    border-top: 1px solid var(--line-color);
  }

  .site-header[data-open] .site-nav {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
  }

  .site-nav__list--left,
  .site-nav__list--right {
    margin-left: 0;
  }

  .nav-link {
    justify-content: space-between;
    width: 100%;
    min-height: 44px;
    padding: 0 12px;
  }

  .header-meter {
    height: 18px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 20px;
  }

  .footer-col--brand,
  .footer-col--contact {
    grid-column: 1 / -1;
    max-width: none;
  }
}

@media (max-width: 720px) {
  :root {
    --shell-pad: 16px;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .chapter-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .log-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .figure--offset {
    transform: none;
  }

  .footer-status {
    gap: 10px 16px;
  }

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

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}