:root {
  color-scheme: light dark;
  --surface: Canvas;
  --ink: CanvasText;
  --muted: color-mix(in srgb, CanvasText 65%, Canvas);
  --line: color-mix(in srgb, CanvasText 25%, Canvas);
  --accent: color-mix(in srgb, CanvasText 15%, Canvas);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 0 2rem;
  background: var(--surface);
  color: var(--ink);
  line-height: 1.45;
}

.skip-link {
  position: absolute;
  left: -999rem;
  top: 0;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
  padding: 0.5rem;
  background: var(--accent);
  z-index: 10;
}

:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 2px;
}

.app-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
}

.app-title {
  font-size: 1.15rem;
  margin: 0;
}

.app-header-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.picker {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin: 0;
}

.identity {
  color: var(--muted);
  font-size: 0.9rem;
}

.banner {
  margin: 0;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
}

.banner-danger {
  background: color-mix(in srgb, red 18%, Canvas);
}

.banner-warning {
  background: color-mix(in srgb, orange 20%, Canvas);
}

.panel {
  max-width: 46rem;
  margin: 1.5rem auto;
  padding: 0 1rem;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(14rem, 1fr) minmax(20rem, 2fr) minmax(16rem, 1.2fr);
  gap: 1rem;
  padding: 1rem;
  align-items: start;
}

.column {
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.75rem;
  min-width: 0;
}

.column h2 {
  font-size: 1rem;
  margin-top: 0;
}

.column h3 {
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

ul,
ol {
  margin: 0.25rem 0;
  padding-left: 0;
  list-style: none;
}

li {
  margin: 0.35rem 0;
}

.inline-form {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0.75rem 0;
}

.enrollment-result {
  margin: 0.75rem 0;
}

.command-block {
  padding: 0.75rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: var(--accent);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

input,
select,
button {
  font: inherit;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  background: var(--surface);
  color: var(--ink);
  max-width: 100%;
}

button {
  cursor: pointer;
}

.session-list button {
  display: block;
  width: 100%;
  text-align: left;
}

.session-list button[aria-current="true"] {
  border-color: currentColor;
  font-weight: 700;
}

.node-list li,
.card-list li,
.task-list li {
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  padding: 0.4rem 0.5rem;
}

.state {
  display: inline-flex;
  gap: 0.3rem;
  align-items: baseline;
  font-size: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  padding: 0 0.45rem;
}

.state-icon {
  font-weight: 700;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.summary {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.2rem 0.75rem;
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

.summary dt {
  color: var(--muted);
}

.summary dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.timeline {
  max-height: 34rem;
  overflow-y: auto;
}

.timeline li {
  border-left: 3px solid var(--line);
  padding: 0.25rem 0.5rem;
}

.timeline-meta {
  color: var(--muted);
  font-size: 0.8rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.timeline-body {
  margin: 0.15rem 0 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.usage-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.usage-table caption {
  text-align: left;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.3rem;
}

.usage-table th,
.usage-table td {
  border: 1px solid var(--line);
  padding: 0.25rem 0.4rem;
  text-align: left;
}

.task-graph {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  padding: 0.4rem;
}

.task-graph svg {
  display: block;
}

.task-graph text {
  fill: currentColor;
  font-size: 11px;
}

.task-graph line {
  stroke: currentColor;
  stroke-width: 1.5;
}

.task-graph rect {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.status {
  margin: 0.5rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.status-error {
  color: color-mix(in srgb, red 70%, CanvasText);
  font-weight: 600;
}

.choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.35rem;
}

@media (max-width: 60rem) {
  .workbench {
    grid-template-columns: 1fr;
  }

  .timeline {
    max-height: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}