:root {
  color-scheme: light dark;
  --ink: #1c1410;
  --muted: #5c534c;
  --paper: #fffaf3;
  --card: #ffffff;
  --line: #e3d8cb;
  --stroke: #3d2f24;
  --accent: #c46a1a;
  --accent-ink: #fff7ec;
  --brood: #e8c96a;
  --super: #b8d4a8;
  --base: #c4a882;
  --lid: #9ab7c9;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, Ubuntu, Cantarell, 'Noto Sans', sans-serif;
  --radius: 12px;
  --shadow: 0 8px 30px rgba(28, 20, 16, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f4ebe0;
    --muted: #b9aa9c;
    --paper: #1a1512;
    --card: #221c18;
    --line: #3a322b;
    --stroke: #d8c7b6;
    --accent: #e8953d;
    --accent-ink: #1a120c;
    --brood: #8a6f2a;
    --super: #4f6b45;
    --base: #6d5840;
    --lid: #4a6678;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.45;
}

a {
  color: var(--accent);
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 0.75rem 1rem;
}

.app-header__inner {
  max-width: 900px;
  margin: 0 auto;
}

.app-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.app-refs {
  margin: 0.35rem 0 0;
  font-size: 0.82rem;
  line-height: 1.45;
}

.app-refs a {
  font-weight: 550;
}

.app-sub {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.shell {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.85rem;
}

.panel__title {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.65rem;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 0.55rem 0.85rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}

.field label {
  font-size: 0.82rem;
  color: var(--muted);
}

.field input[type='text'],
.field input[type='number'],
.field select {
  width: 100%;
  max-width: 8rem;
  min-height: 44px;
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: 0.45rem 0.65rem;
  font: inherit;
  background: var(--paper);
  color: var(--ink);
}

.field select {
  max-width: none;
}

.hint {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0.25rem 0 0;
}

.progress {
  margin: 0.75rem 0 0.25rem;
  height: 10px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.25s ease;
}

.progress__text {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0.35rem 0 0;
}

.checklist-progress {
  margin-top: 1.25rem;
}

.checklist-progress .progress {
  margin-top: 0;
}

.diagrams {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.diagrams__row--two {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .diagrams__row--two {
    grid-template-columns: 1fr 1fr;
  }
}

.hive-3d-root {
  width: 100%;
  height: min(48vh, 400px);
  min-height: 260px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  touch-action: none;
}

.hive-3d-root canvas {
  display: block;
}

.diagram-card svg {
  width: 100%;
  height: auto;
  display: block;
}

.diagram-card h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
}

.check-group {
  margin-top: 1rem;
}

.check-group__title {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.check-row {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.check-row__label {
  display: flex;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  align-items: flex-start;
  cursor: pointer;
}

.check-row__input {
  width: 22px;
  height: 22px;
  margin-top: 2px;
  flex-shrink: 0;
}

.check-row__body {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.check-row__title {
  font-weight: 600;
}

.check-row__dims {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-weight: 650;
}

.check-row__bundle {
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--muted);
}

.check-row__note,
.check-row__hint {
  font-size: 0.82rem;
  color: var(--muted);
}

.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;
}