/* Sectional 0.1.1 */
/* Sectional. Everything sits in cascade layers, so a project's own unlayered
   CSS always wins and the kit can be adopted one component at a time. */
@layer ds.tokens, ds.base, ds.components;

@layer ds.tokens {
/* Light values live on :root. The two dark blocks hold identical values:
   the first follows the OS, the second is an explicit data-theme="dark". */
:root {
  color-scheme: light;

  /* surfaces */
  --ds-bg: #e7f0ea;
  --ds-surface: #f8fbf7;
  --ds-sunken: #dce8e0;
  --ds-line: #a3bbae;
  --ds-line-strong: #6f8b7e;

  /* text */
  --ds-fg: #12263a;
  --ds-fg2: #3c5364;

  /* airway magenta: position, primary action, focus */
  --ds-accent: #a3146e;
  --ds-fill: #a3146e;
  --ds-fill-hover: #870f5a;
  --ds-on-fill: #ffffff;

  /* chart blue: links and secondary information */
  --ds-second: #1b5fa6;

  /* state */
  --ds-good: #1f7350;
  --ds-warn: #80540a;
  --ds-bad: #b3261e;

  /* data series, in order of use */
  --ds-series-1: #a3146e;
  --ds-series-2: #1b5fa6;
  --ds-series-3: #80540a;
  --ds-series-4: #1f7350;

  /* overlays only. Nothing else casts a shadow. */
  --ds-shadow: 0 8px 28px rgb(18 38 58 / 0.22);
  --ds-backdrop: rgb(18 38 58 / 0.45);

  /* type */
  --ds-font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --ds-font-body: 'Barlow', system-ui, -apple-system, sans-serif;
  --ds-font-code: 'IBM Plex Mono', ui-monospace, monospace;

  --ds-text-xs: 0.8125rem;
  --ds-text-sm: 0.9375rem;
  --ds-text-md: 1.0625rem;
  --ds-text-lg: 1.3125rem;
  --ds-text-xl: 1.75rem;
  --ds-text-2xl: 2.5rem;
  --ds-text-3xl: clamp(2.75rem, 7vw, 4.5rem);

  /* space, on a 4px base */
  --ds-1: 0.25rem;
  --ds-2: 0.5rem;
  --ds-3: 0.75rem;
  --ds-4: 1rem;
  --ds-5: 1.5rem;
  --ds-6: 2rem;
  --ds-7: 3rem;
  --ds-8: 4rem;

  /* shape */
  --ds-radius: 5px;
  --ds-radius-lg: 8px;
  --ds-control: 2.5rem;
  --ds-control-sm: 2rem;
  --ds-route-weight: 2px;

  /* motion */
  --ds-fast: 120ms;
  --ds-slow: 220ms;
  --ds-ease: cubic-bezier(0.2, 0.8, 0.2, 1);

  /* layout */
  --ds-page: 72rem;
  --ds-prose: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --ds-bg: #0f1f1b;
    --ds-surface: #182c27;
    --ds-sunken: #0b1714;
    --ds-line: #36524a;
    --ds-line-strong: #5d7f74;
    --ds-fg: #e8f0ee;
    --ds-fg2: #a5bab4;
    --ds-accent: #f483c4;
    --ds-fill: #f483c4;
    --ds-fill-hover: #f9a3d5;
    --ds-on-fill: #3a0526;
    --ds-second: #86bdf2;
    --ds-good: #66cfa0;
    --ds-warn: #e8bd6a;
    --ds-bad: #f4978e;
    --ds-series-1: #f483c4;
    --ds-series-2: #86bdf2;
    --ds-series-3: #e8bd6a;
    --ds-series-4: #66cfa0;
    --ds-shadow: 0 8px 28px rgb(0 0 0 / 0.5);
    --ds-backdrop: rgb(5 12 10 / 0.65);
  }
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --ds-bg: #0f1f1b;
  --ds-surface: #182c27;
  --ds-sunken: #0b1714;
  --ds-line: #36524a;
  --ds-line-strong: #5d7f74;
  --ds-fg: #e8f0ee;
  --ds-fg2: #a5bab4;
  --ds-accent: #f483c4;
  --ds-fill: #f483c4;
  --ds-fill-hover: #f9a3d5;
  --ds-on-fill: #3a0526;
  --ds-second: #86bdf2;
  --ds-good: #66cfa0;
  --ds-warn: #e8bd6a;
  --ds-bad: #f4978e;
  --ds-series-1: #f483c4;
  --ds-series-2: #86bdf2;
  --ds-series-3: #e8bd6a;
  --ds-series-4: #66cfa0;
  --ds-shadow: 0 8px 28px rgb(0 0 0 / 0.5);
  --ds-backdrop: rgb(5 12 10 / 0.65);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --ds-fast: 0ms;
    --ds-slow: 0ms;
  }
}
}

@layer ds.base {
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--ds-bg);
  color: var(--ds-fg);
  font-family: var(--ds-font-body);
  font-size: var(--ds-text-md);
  line-height: 1.55;
}

h1, h2, h3, h4 {
  font-family: var(--ds-font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
  text-wrap: balance;
}

h1 { font-size: var(--ds-text-3xl); }
h2 { font-size: var(--ds-text-2xl); }
h3 { font-size: var(--ds-text-xl); }
h4 { font-size: var(--ds-text-lg); }

p {
  margin: 0;
  max-width: var(--ds-prose);
}

a {
  color: var(--ds-second);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration-thickness: 2px;
}

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

code, kbd, pre {
  font-family: var(--ds-font-code);
  font-size: 0.9em;
}

:focus-visible {
  outline: 2px solid var(--ds-accent);
  outline-offset: 2px;
}

::selection {
  background: color-mix(in srgb, var(--ds-accent) 24%, transparent);
}
}

@layer ds.components {
.ds-container {
  width: 100%;
  max-width: var(--ds-page);
  margin-inline: auto;
  padding-left: max(var(--ds-4), env(safe-area-inset-left, 0px));
  padding-right: max(var(--ds-4), env(safe-area-inset-right, 0px));
}

.ds-container--wide { max-width: none; }
.ds-container--prose { max-width: calc(var(--ds-prose) + 2 * var(--ds-4)); }

.ds-stack {
  display: grid;
  align-content: start;
  gap: var(--ds-gap, var(--ds-4));
}

.ds-stack > * { min-width: 0; }

.ds-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-gap, var(--ds-3));
}

.ds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--ds-min, 18rem)), 1fr));
  gap: var(--ds-gap, var(--ds-4));
}

.ds-split {
  display: grid;
  gap: var(--ds-5);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 60rem) {
  .ds-split { grid-template-columns: minmax(0, 1fr) 22rem; }
}

.ds-quiet { color: var(--ds-fg2); }
.ds-small { font-size: var(--ds-text-sm); }
.ds-num { font-variant-numeric: tabular-nums; }

.ds-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
}

@layer ds.components {
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ds-2);
  min-height: var(--ds-control);
  padding: 0 var(--ds-4);
  border: 1px solid var(--ds-line-strong);
  border-radius: var(--ds-radius);
  background: transparent;
  color: var(--ds-fg);
  font-family: var(--ds-font-body);
  font-size: var(--ds-text-sm);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--ds-fast) var(--ds-ease),
    border-color var(--ds-fast) var(--ds-ease),
    color var(--ds-fast) var(--ds-ease);
}

.ds-btn:hover {
  background: color-mix(in srgb, var(--ds-fg) 8%, transparent);
  border-color: var(--ds-fg);
}

.ds-btn:active { background: color-mix(in srgb, var(--ds-fg) 14%, transparent); }

.ds-btn--primary {
  background: var(--ds-fill);
  border-color: var(--ds-fill);
  color: var(--ds-on-fill);
}

.ds-btn--primary:hover,
.ds-btn--primary:active {
  background: var(--ds-fill-hover);
  border-color: var(--ds-fill-hover);
}

.ds-btn--quiet {
  border-color: transparent;
  color: var(--ds-second);
  padding-inline: var(--ds-3);
}

.ds-btn--quiet:hover { border-color: transparent; }

.ds-btn--danger {
  border-color: var(--ds-bad);
  color: var(--ds-bad);
}

.ds-btn--danger:hover {
  border-color: var(--ds-bad);
  background: color-mix(in srgb, var(--ds-bad) 12%, transparent);
}

.ds-btn--sm {
  min-height: var(--ds-control-sm);
  padding-inline: var(--ds-3);
  font-size: var(--ds-text-xs);
}

.ds-btn--icon {
  width: var(--ds-control);
  padding: 0;
}

.ds-btn--icon.ds-btn--sm { width: var(--ds-control-sm); }

.ds-btn svg {
  width: 1.15em;
  height: 1.15em;
  flex: none;
}

.ds-btn:disabled,
.ds-btn[aria-disabled='true'] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.ds-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-2);
  min-height: var(--ds-control-sm);
  padding: 0 var(--ds-3);
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: transparent;
  color: var(--ds-fg2);
  font-family: var(--ds-font-body);
  font-size: var(--ds-text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--ds-fast) var(--ds-ease),
    color var(--ds-fast) var(--ds-ease);
}

.ds-chip:hover {
  border-color: var(--ds-line-strong);
  color: var(--ds-fg);
}

.ds-chip[aria-pressed='true'] {
  border-color: var(--ds-accent);
  background: color-mix(in srgb, var(--ds-accent) 12%, transparent);
  color: var(--ds-accent);
}

.ds-segmented {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
}

.ds-segmented label {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: var(--ds-control-sm);
  padding: 0 var(--ds-3);
  color: var(--ds-fg2);
  font-size: var(--ds-text-sm);
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
}

.ds-segmented label + label { border-left: 1px solid var(--ds-line); }
.ds-segmented label:hover { color: var(--ds-fg); }

.ds-segmented input {
  position: absolute;
  opacity: 0;
  inset: 0;
  margin: 0;
  cursor: pointer;
}

.ds-segmented label:has(input:checked) {
  background: var(--ds-fg);
  color: var(--ds-bg);
}

.ds-segmented label:has(input:focus-visible) {
  outline: 2px solid var(--ds-accent);
  outline-offset: -2px;
}
}

@layer ds.components {
.ds-field {
  display: grid;
  gap: var(--ds-1);
  min-width: 0;
}

.ds-label {
  color: var(--ds-fg2);
  font-size: var(--ds-text-sm);
  font-weight: 500;
}

.ds-help {
  color: var(--ds-fg2);
  font-size: var(--ds-text-xs);
}

.ds-error {
  color: var(--ds-bad);
  font-size: var(--ds-text-xs);
  font-weight: 500;
}

.ds-input {
  width: 100%;
  min-height: var(--ds-control);
  padding: var(--ds-2) var(--ds-3);
  border: 1px solid var(--ds-line-strong);
  border-radius: var(--ds-radius);
  background: var(--ds-surface);
  color: var(--ds-fg);
  font-family: var(--ds-font-body);
  font-size: var(--ds-text-md);
  line-height: 1.4;
  transition: border-color var(--ds-fast) var(--ds-ease);
}

.ds-input::placeholder { color: var(--ds-fg2); opacity: 0.8; }
.ds-input:hover { border-color: var(--ds-fg2); }
.ds-input:focus-visible { outline-offset: 0; border-color: var(--ds-accent); }
.ds-input:disabled { opacity: 0.5; cursor: not-allowed; }

textarea.ds-input {
  min-height: 7rem;
  resize: vertical;
}

select.ds-input {
  appearance: none;
  padding-right: var(--ds-6);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ds-fg2) 50%),
    linear-gradient(135deg, var(--ds-fg2) 50%, transparent 50%);
  background-position: right 1.05rem center, right 0.75rem center;
  background-size: 0.3rem 0.3rem;
  background-repeat: no-repeat;
}

.ds-input[aria-invalid='true'] { border-color: var(--ds-bad); }

.ds-check {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-2);
  font-size: var(--ds-text-md);
  cursor: pointer;
}

.ds-check input[type='checkbox']:not(.ds-switch),
.ds-check input[type='radio'] {
  width: 1.1rem;
  height: 1.1rem;
  margin: 0;
  flex: none;
  accent-color: var(--ds-fill);
}

.ds-switch {
  appearance: none;
  position: relative;
  width: 2.5rem;
  height: 1.5rem;
  margin: 0;
  flex: none;
  border: 1px solid var(--ds-line-strong);
  border-radius: 999px;
  background: var(--ds-sunken);
  cursor: pointer;
  transition: background-color var(--ds-fast) var(--ds-ease),
    border-color var(--ds-fast) var(--ds-ease);
}

/* The knob is a waypoint ring. */
.ds-switch::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 3px;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--ds-fg2);
  border-radius: 50%;
  background: var(--ds-surface);
  transform: translateY(-50%);
  transition: transform var(--ds-fast) var(--ds-ease),
    border-color var(--ds-fast) var(--ds-ease);
}

.ds-switch:checked {
  background: var(--ds-fill);
  border-color: var(--ds-fill);
}

.ds-switch:checked::after {
  border-color: var(--ds-fill);
  transform: translate(1rem, -50%);
}
}

@layer ds.components {
.ds-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  gap: var(--ds-4);
  margin: 0;
}

.ds-stat { min-width: 0; }

.ds-stat dt {
  color: var(--ds-fg2);
  font-size: var(--ds-text-sm);
}

.ds-stat dd {
  margin: 0;
  font-family: var(--ds-font-display);
  font-size: var(--ds-text-xl);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  line-height: 1.15;
}

.ds-stat small {
  margin-left: 0.1em;
  color: var(--ds-fg2);
  font-family: var(--ds-font-body);
  font-size: 0.55em;
  font-weight: 400;
}

.ds-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-surface);
}

.ds-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--ds-text-sm);
}

.ds-table th,
.ds-table td {
  padding: var(--ds-2) var(--ds-3);
  text-align: left;
  white-space: nowrap;
}

.ds-table thead th {
  border-bottom: 1px solid var(--ds-line-strong);
  color: var(--ds-fg2);
  font-weight: 500;
}

.ds-table tbody tr + tr > * { border-top: 1px solid var(--ds-line); }
.ds-table tbody tr:hover > * { background: color-mix(in srgb, var(--ds-fg) 4%, transparent); }

.ds-table .ds-num,
.ds-table [data-num] {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.ds-tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.5rem;
  padding: 0 var(--ds-2);
  border-radius: var(--ds-radius);
  background: var(--ds-sunken);
  color: var(--ds-fg2);
  font-size: var(--ds-text-xs);
  font-weight: 500;
}

/* State always has words. The ring keeps it from reading as a plain tag. */
.ds-pill {
  --tone: var(--ds-fg2);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  min-height: 1.5rem;
  padding: 0 var(--ds-2);
  border: 1px solid var(--tone);
  border-radius: var(--ds-radius);
  color: var(--tone);
  font-size: var(--ds-text-xs);
  font-weight: 500;
  white-space: nowrap;
}

.ds-pill::before {
  content: '';
  width: 0.5rem;
  height: 0.5rem;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.ds-pill--good { --tone: var(--ds-good); }
.ds-pill--warn { --tone: var(--ds-warn); }
.ds-pill--bad { --tone: var(--ds-bad); }
.ds-pill--accent { --tone: var(--ds-accent); }

.ds-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ds-1) var(--ds-4);
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--ds-fg2);
  font-size: var(--ds-text-xs);
}

.ds-legend li {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-2);
}

.ds-legend li::before {
  content: '';
  width: 1rem;
  height: 0;
  border-top: 2px solid var(--ds-key, currentColor);
}

.ds-skeleton {
  display: block;
  min-height: 1em;
  border-radius: var(--ds-radius);
  background: var(--ds-sunken);
  animation: ds-skeleton 1.4s ease-in-out infinite;
}

@keyframes ds-skeleton {
  50% { opacity: 0.55; }
}

@media (prefers-reduced-motion: reduce) {
  .ds-skeleton { animation: none; }
}

.ds-code {
  overflow-x: auto;
  margin: 0;
  padding: var(--ds-3) var(--ds-4);
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-sunken);
  font-family: var(--ds-font-code);
  font-size: var(--ds-text-xs);
  line-height: 1.6;
}

.ds-kbd {
  padding: 0 0.35em;
  border: 1px solid var(--ds-line-strong);
  border-radius: 3px;
  font-family: var(--ds-font-code);
  font-size: 0.85em;
}
}

@layer ds.components {
.ds-card {
  --ds-ring-fill: var(--ds-surface);
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-surface);
  color: inherit;
}

.ds-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-2) var(--ds-3);
  padding: var(--ds-3) var(--ds-4);
  border-bottom: 1px solid var(--ds-line);
}

.ds-card__title {
  margin: 0;
  font-family: var(--ds-font-display);
  font-size: var(--ds-text-lg);
  font-weight: 600;
  line-height: 1.15;
}

.ds-card__body {
  display: grid;
  gap: var(--ds-3);
  padding: var(--ds-4);
}

.ds-card__body > * { min-width: 0; }

.ds-card__media {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--ds-line);
  background: var(--ds-sunken);
}

/* A whole card that links. It responds with its edge and title, never by lifting. */
a.ds-card {
  text-decoration: none;
  transition: border-color var(--ds-fast) var(--ds-ease);
}

a.ds-card:hover { border-color: var(--ds-accent); }
a.ds-card:hover .ds-card__title { color: var(--ds-accent); }

.ds-callout {
  --tone: var(--ds-second);
  padding: var(--ds-3) var(--ds-4);
  border: 1px solid var(--tone);
  border-radius: var(--ds-radius-lg);
  background: color-mix(in srgb, var(--tone) 9%, transparent);
  font-size: var(--ds-text-sm);
}

.ds-callout--good { --tone: var(--ds-good); }
.ds-callout--warn { --tone: var(--ds-warn); }
.ds-callout--bad { --tone: var(--ds-bad); }
.ds-callout strong { font-weight: 600; }

.ds-disclosure {
  border-bottom: 1px solid var(--ds-line);
}

.ds-disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-3);
  min-height: var(--ds-control);
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

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

.ds-disclosure summary::after {
  content: '+';
  color: var(--ds-fg2);
  font-size: var(--ds-text-lg);
  font-weight: 400;
}

.ds-disclosure[open] summary::after { content: '\2212'; }
.ds-disclosure > :not(summary) { padding-bottom: var(--ds-3); }

/* Overlays are the only things above the page, so they alone get a shadow. */
.ds-dialog {
  width: min(32rem, calc(100vw - 2rem));
  max-height: calc(100dvh - 2rem);
  padding: 0;
  border: 1px solid var(--ds-line-strong);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-surface);
  color: var(--ds-fg);
  box-shadow: var(--ds-shadow);
}

.ds-dialog::backdrop { background: var(--ds-backdrop); }

.ds-dialog[open] { animation: ds-appear var(--ds-slow) var(--ds-ease); }

.ds-dialog__body {
  display: grid;
  gap: var(--ds-3);
  padding: var(--ds-5);
}

.ds-dialog__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--ds-2);
  padding: var(--ds-3) var(--ds-5);
  border-top: 1px solid var(--ds-line);
}

.ds-toast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-4);
  width: min(24rem, 100%);
  padding: var(--ds-2) var(--ds-2) var(--ds-2) var(--ds-4);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-fg);
  color: var(--ds-bg);
  box-shadow: var(--ds-shadow);
  font-size: var(--ds-text-sm);
  font-weight: 500;
}

.ds-toast .ds-btn {
  border-color: transparent;
  color: inherit;
}

.ds-toasts {
  position: fixed;
  right: max(var(--ds-4), env(safe-area-inset-right, 0px));
  bottom: max(var(--ds-4), env(safe-area-inset-bottom, 0px));
  left: max(var(--ds-4), env(safe-area-inset-left, 0px));
  z-index: 50;
  display: grid;
  justify-items: end;
  gap: var(--ds-2);
  pointer-events: none;
}

.ds-toasts > * {
  pointer-events: auto;
  animation: ds-appear var(--ds-slow) var(--ds-ease);
}

@keyframes ds-appear {
  from { opacity: 0; }
}
}

@layer ds.components {
.ds-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 40;
  border-bottom: 1px solid var(--ds-line);
  background: var(--ds-bg);
}

.ds-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 var(--ds-5);
  min-height: 3.5rem;
}

.ds-brand {
  color: var(--ds-fg);
  font-family: var(--ds-font-display);
  font-size: var(--ds-text-lg);
  font-weight: 600;
  text-decoration: none;
}

.ds-header__end {
  display: flex;
  align-items: center;
  gap: var(--ds-2);
  margin-left: auto;
}

/* No hamburger: on narrow screens the links wrap to their own row and scroll. */
.ds-nav {
  display: flex;
  gap: var(--ds-4);
  overflow-x: auto;
  scrollbar-width: none;
}

@media (max-width: 40rem) {
  .ds-nav { order: 3; width: 100%; }
}

.ds-nav a,
.ds-tabs a,
.ds-tabs button {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: var(--ds-control);
  padding: 0;
  border: 0;
  background: none;
  color: var(--ds-fg2);
  font-family: var(--ds-font-body);
  font-size: var(--ds-text-sm);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--ds-fast) var(--ds-ease);
}

.ds-nav a:hover,
.ds-tabs a:hover,
.ds-tabs button:hover {
  color: var(--ds-fg);
}

/* The current item sits on the route line. */
.ds-nav [aria-current]::after,
.ds-tabs [aria-current]::after,
.ds-tabs [aria-selected='true']::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: var(--ds-route-weight);
  background: var(--ds-accent);
}

.ds-nav [aria-current],
.ds-tabs [aria-current],
.ds-tabs [aria-selected='true'] {
  color: var(--ds-fg);
}

.ds-tabs {
  display: flex;
  gap: var(--ds-5);
  overflow-x: auto;
  border-bottom: 1px solid var(--ds-line);
  scrollbar-width: none;
}

.ds-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ds-2);
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--ds-fg2);
  font-size: var(--ds-text-sm);
}

.ds-crumbs li + li::before {
  content: '/';
  margin-right: var(--ds-2);
  color: var(--ds-line-strong);
}

.ds-crumbs a { color: inherit; }

.ds-footer {
  border-top: 1px solid var(--ds-line);
  color: var(--ds-fg2);
  font-size: var(--ds-text-sm);
}

.ds-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-2) var(--ds-5);
  padding-block: var(--ds-5);
}
}

@layer ds.components {
/* The route line is the kit's one signature: a magenta line with hollow
   waypoint rings, used only to show position or progress along something. */

.ds-route {
  --ring: 0.875rem;
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ds-route > li {
  position: relative;
  min-width: 0;
  padding: 0 0 var(--ds-5) calc(var(--ring) + var(--ds-3));
}

.ds-route > li:last-child { padding-bottom: 0; }

/* Ring */
.ds-route > li::before {
  content: '';
  position: absolute;
  z-index: 1;
  top: 0.32em;
  left: 0;
  width: var(--ring);
  height: var(--ring);
  border: var(--ds-route-weight) solid var(--ds-accent);
  border-radius: 50%;
  background: var(--ds-ring-fill, var(--ds-bg));
}

/* Leg to the next waypoint */
.ds-route > li:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 0.32em;
  bottom: -0.32em;
  left: calc((var(--ring) - var(--ds-route-weight)) / 2);
  width: var(--ds-route-weight);
  background: var(--ds-accent);
}

.ds-route__meta {
  display: block;
  color: var(--ds-fg2);
  font-size: var(--ds-text-sm);
  font-variant-numeric: tabular-nums;
}

.ds-route__title {
  display: block;
  font-family: var(--ds-font-display);
  font-size: var(--ds-text-lg);
  font-weight: 600;
  line-height: 1.2;
}

/* The current waypoint is filled. Anything after it is planned, not flown. */
.ds-route > li[aria-current]::before { background: var(--ds-accent); }

.ds-route > li[aria-current] ~ li::before,
.ds-route > li[aria-current] ~ li::after,
.ds-route > li[aria-current]::after {
  border-color: var(--ds-line-strong);
}

.ds-route > li[aria-current]::after,
.ds-route > li[aria-current] ~ li::after {
  background: repeating-linear-gradient(to bottom, var(--ds-line-strong) 0 4px, transparent 4px 8px);
}

.ds-route--across {
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
}

.ds-route--across > li {
  padding: calc(var(--ring) + var(--ds-2)) var(--ds-3) 0 0;
}

.ds-route--across > li::before { top: 0; }

.ds-route--across > li:not(:last-child)::after {
  top: calc((var(--ring) - var(--ds-route-weight)) / 2);
  right: 0;
  bottom: auto;
  left: 0;
  width: auto;
  height: var(--ds-route-weight);
}

.ds-route--across > li[aria-current]::after,
.ds-route--across > li[aria-current] ~ li::after {
  background: repeating-linear-gradient(to right, var(--ds-line-strong) 0 4px, transparent 4px 8px);
}

@media (max-width: 34rem) {
  .ds-route--across { grid-auto-flow: row; }

  .ds-route--across > li {
    padding: 0 0 var(--ds-4) calc(var(--ring) + var(--ds-3));
  }

  .ds-route--across > li::before { top: 0.32em; }

  .ds-route--across > li:not(:last-child)::after {
    top: 0.32em;
    right: auto;
    bottom: -0.32em;
    left: calc((var(--ring) - var(--ds-route-weight)) / 2);
    width: var(--ds-route-weight);
    height: auto;
  }

  .ds-route--across > li[aria-current]::after,
  .ds-route--across > li[aria-current] ~ li::after {
    background: repeating-linear-gradient(to bottom, var(--ds-line-strong) 0 4px, transparent 4px 8px);
  }
}

/* Set --value as a percentage, alongside role="progressbar". */
.ds-progress {
  position: relative;
  height: 0.875rem;
  margin-right: 0.875rem;
}

.ds-progress::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -0.875rem;
  left: 0;
  height: var(--ds-route-weight);
  margin-top: calc(var(--ds-route-weight) / -2);
  background: repeating-linear-gradient(to right, var(--ds-line-strong) 0 4px, transparent 4px 8px);
}

.ds-progress::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: var(--value, 0%);
  height: var(--ds-route-weight);
  margin-top: calc(var(--ds-route-weight) / -2);
  background: var(--ds-accent);
}

.ds-progress > i {
  position: absolute;
  z-index: 1;
  top: 0;
  left: var(--value, 0%);
  box-sizing: border-box;
  width: 0.875rem;
  height: 0.875rem;
  border: var(--ds-route-weight) solid var(--ds-accent);
  border-radius: 50%;
  background: var(--ds-ring-fill, var(--ds-bg));
}
}