:root {
  color-scheme: dark;
  --bg: #101113;
  --panel: #191b1f;
  --panel-2: #22252b;
  --line: #343841;
  --text: #eeeeee;
  --muted: #a5adba;
  --accent: #7dd3fc;
  --good: #86efac;
  --danger: #f87171;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  display: flex;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.45rem 0.65rem;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button:disabled:hover {
  border-color: var(--line);
}

button.active {
  border-color: var(--accent);
  background: #143040;
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.45rem 0.55rem;
  background: #111318;
  color: var(--text);
}

label {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
}

code {
  display: block;
  padding: 0.5rem;
  border-radius: 6px;
  background: #111318;
  color: var(--good);
  overflow-wrap: anywhere;
  font-size: 0.8rem;
}

.sidebar {
  width: 330px;
  min-width: 330px;
  height: 100vh;
  overflow-y: auto;
  padding: 1rem;
  background: var(--panel);
  border-right: 1px solid var(--line);
}

.sidebar section {
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.sidebar h1,
.sidebar h2 {
  margin: 0 0 0.75rem;
}

.sidebar h1 {
  font-size: 1.15rem;
}

.sidebar h2 {
  font-size: 0.9rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.settings-panel summary {
  cursor: pointer;
  list-style: none;
}

.settings-panel summary::-webkit-details-marker {
  display: none;
}

.settings-panel summary h2 {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
}

.settings-panel summary h2::before {
  content: "▸";
  font-size: 0.85rem;
}

.settings-panel[open] summary h2::before {
  content: "▾";
}

.settings-body {
  padding-top: 0.75rem;
}

.status,
.small,
.hint {
  color: var(--muted);
  font-size: 0.82rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

.wide {
  width: 100%;
  margin-top: 0.5rem;
}

.row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.row > * {
  flex: 1;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.section-header h2 {
  margin-bottom: 0;
}

.strip-list {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.75rem;
}

.strip-card {
  display: grid;
  grid-template-columns: 1rem 1fr auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #14161b;
}

.strip-card.active {
  border-color: var(--accent);
  background: #172634;
}

.strip-color {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
}

.strip-meta {
  color: var(--muted);
  font-size: 0.76rem;
}

.strip-actions {
  display: flex;
  gap: 0.35rem;
}

.strip-actions button {
  padding: 0.25rem 0.4rem;
}

.workspace {
  flex: 1;
  min-width: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: 42px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1rem;
  background: #15171b;
  border-bottom: 1px solid var(--line);
}

#mode-label {
  color: var(--good);
  font-weight: 600;
}

#viewport {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  cursor: grab;
  background: #07080a;
}

#viewport.drawing,
#viewport.set-zero {
  cursor: crosshair;
}

#viewport.dragging {
  cursor: grabbing;
}

#viewport.over-segment {
  cursor: pointer;
}

#viewport.over-handle {
  cursor: move;
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.popup {
  position: absolute;
  z-index: 2;
  min-width: 210px;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(20, 22, 27, 0.96);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
  font-size: 0.88rem;
  pointer-events: none;
}

.popup.hidden {
  display: none;
}

.popup-title {
  margin-bottom: 0.45rem;
  color: var(--accent);
  font-weight: 700;
}

.popup-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
}

.popup-row strong {
  color: var(--text);
}