:root {
  color-scheme: dark;
  --bg: #13161c;
  --panel: #1c2028;
  --panel-soft: #242a35;
  --border: #333b4a;
  --text: #eef2ff;
  --muted: #97a3b6;
  --accent: #6ea8fe;
  --accent-strong: #377dff;
  --danger: #df5a5a;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #0e1117 0%, #161b22 100%);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid transparent;
  background: var(--accent-strong);
  color: white;
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  cursor: pointer;
  transition: 0.18s ease;
}

button:hover,
.file-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

button.ghost,
.file-button.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

button.danger {
  background: rgba(223, 90, 90, 0.15);
  border-color: rgba(223, 90, 90, 0.35);
  color: #ffb9b9;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

input,
select {
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #131821;
  color: var(--text);
  padding: 0.65rem 0.75rem;
  min-width: 0;
}

input:focus,
select:focus {
  outline: 2px solid rgba(110, 168, 254, 0.35);
  border-color: var(--accent);
}

.app-shell {
  display: grid;
  grid-template-columns: 380px 1fr;
  min-height: 100vh;
}

.panel {
  background: rgba(19, 22, 28, 0.92);
  border-right: 1px solid var(--border);
  padding: 1.2rem;
  display: grid;
  gap: 1rem;
  align-content: start;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.workspace {
  padding: 1.2rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.canvas-card,
.card {
  background: rgba(28, 32, 40, 0.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.card {
  padding: 1rem;
}

.canvas-card {
  overflow: hidden;
}

.list-card {
  grid-column: 1 / -1;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.section-head.sticky {
  padding: 1rem 1rem 0.2rem;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.35rem;
}

h2 {
  font-size: 1.05rem;
}

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  margin-bottom: 0.4rem;
}

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

.small {
  font-size: 0.86rem;
}

.grid {
  display: grid;
  gap: 0.75rem;
}

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

.grid.compact {
  margin-top: 0.8rem;
}

.tool-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.tool-row.secondary {
  margin-top: 0.65rem;
}

.span-two {
  grid-column: 1 / -1;
}

.placement-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.9rem;
  background: rgba(19, 24, 33, 0.65);
  display: grid;
  gap: 0.8rem;
}

.placement-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.inline-select {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.slider-stack {
  display: grid;
  gap: 0.65rem;
}

.slider-stack input[type="range"] {
  width: 100%;
  accent-color: var(--accent-strong);
  padding: 0;
}

.nudge-layout {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.55rem;
}

.nudge-layout button {
  padding-inline: 0.4rem;
}

.badge,
.scale-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  color: var(--muted);
  font-size: 0.78rem;
  white-space: nowrap;
}

.view-tools {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.zoom-control {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.zoom-control input {
  width: 120px;
  accent-color: var(--accent-strong);
}

.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  cursor: pointer;
}

.hidden {
  display: none !important;
}

canvas {
  width: 100%;
  height: min(52vh, 680px);
  display: block;
  background: linear-gradient(180deg, #10141b 0%, #171d26 100%);
}

.items-list {
  display: grid;
  gap: 0.7rem;
  padding: 0 1rem 1rem;
}

.item-row {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.85rem 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  background: rgba(19, 24, 33, 0.8);
}

.item-row.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(110, 168, 254, 0.18) inset;
}

.item-meta {
  color: var(--muted);
  font-size: 0.83rem;
}

.legend {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.8rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  margin-right: 0.35rem;
}

.dot.caravan {
  background: #8bb8ff;
}

.dot.structure {
  background: #c6905b;
}

@media (max-width: 1200px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .panel {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 760px) {
  .section-head {
    flex-direction: column;
  }

  .view-tools,
  .stacked-mobile {
    width: 100%;
    justify-content: flex-start;
  }

  .zoom-control input {
    width: 100%;
    max-width: 180px;
  }

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

.material-list {
  display: grid;
  gap: 0.85rem;
}

.material-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

.material-stats > div {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(19, 24, 33, 0.72);
  padding: 0.75rem;
  display: grid;
  gap: 0.25rem;
}

.material-stats strong {
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.25;
}

.material-section {
  display: grid;
  gap: 0.55rem;
}

.material-title {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.material-row {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem;
  background: rgba(19, 24, 33, 0.55);
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: start;
}

.material-amount {
  color: #dbe7ff;
  font-weight: 700;
  white-space: nowrap;
}

.cut-list {
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.cut-list summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9rem;
}

.cut-table {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.65rem;
}

.cut-row {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  color: var(--muted);
  font-size: 0.84rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 0.35rem;
}

.cut-row span:last-child {
  color: #dbe7ff;
  white-space: nowrap;
}

.plan-check {
  display: grid;
  gap: 0.75rem;
}

.check-summary {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem;
  background: rgba(19, 24, 33, 0.72);
  display: grid;
  gap: 0.25rem;
}

.check-summary strong {
  color: var(--text);
}

.check-summary span {
  color: var(--muted);
  font-size: 0.84rem;
}

.check-summary.ok {
  border-color: rgba(97, 201, 168, 0.45);
  background: rgba(97, 201, 168, 0.1);
}

.check-summary.warning {
  border-color: rgba(255, 214, 102, 0.45);
  background: rgba(255, 214, 102, 0.1);
}

.check-summary.danger {
  border-color: rgba(223, 90, 90, 0.55);
  background: rgba(223, 90, 90, 0.12);
}

.plan-check details {
  border-top: 1px solid var(--border);
  padding-top: 0.7rem;
}

.plan-check summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9rem;
}

.check-list {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.65rem;
}

.check-row {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  background: rgba(19, 24, 33, 0.52);
}

.check-row.info {
  border-color: rgba(97, 201, 168, 0.28);
}

.check-row.warning {
  border-color: rgba(255, 214, 102, 0.32);
}

.check-row.error {
  border-color: rgba(223, 90, 90, 0.42);
}