:root {
  --bar-track: #dfe3ea;
  --bar-fill: #4b6fe0;
  --milestone: #d64545;
  --grid-line: #eceff3;
  --today-line: #d64545;
  --text: #24272c;
  --muted: #6b7280;
  --bg: #ffffff;
  --surface: #ffffff;
  --bucket-bg: #f7f8fa;
  --row-border: #f5f5f5;
  --button-bg: #ffffff;
  --button-text: var(--text);
  --focus-ring: #4b6fe0;
  --accent-text: #ffffff;
  --label-width: 200px;
}

:root[data-theme="dark"] {
  --bar-track: #3a3d44;
  --bar-fill: #7c9dff;
  --milestone: #ff8a8a;
  --grid-line: #3a3d44;
  --today-line: #ff8a8a;
  --text: #f3f4f6;
  --muted: #b3b8c2;
  --bg: #1f1f1f;
  --surface: #26262a;
  --bucket-bg: #2c2d31;
  --row-border: #2c2d31;
  --button-bg: #2c2d31;
  --button-text: var(--text);
  --focus-ring: #7c9dff;
  --accent-text: #1f1f1f;
}

:root[data-theme="contrast"] {
  --bar-track: #000000;
  --bar-fill: #ffff00;
  --milestone: #ffff00;
  --grid-line: #ffffff;
  --today-line: #ffff00;
  --text: #ffffff;
  --muted: #ffffff;
  --bg: #000000;
  --surface: #000000;
  --bucket-bg: #000000;
  --row-border: #ffffff;
  --button-bg: #000000;
  --button-text: #ffffff;
  --focus-ring: #ffff00;
  --accent-text: #000000;
}

* { box-sizing: border-box; }

html, body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--grid-line);
  background: var(--surface);
}

.topbar h1 {
  font-size: 16px;
  margin: 0;
}

#plan-picker {
  max-width: 100%;
  min-height: 44px;
  background: var(--button-bg);
  color: var(--button-text);
  border: 1px solid var(--grid-line);
}

.zoom-controls {
  display: flex;
  gap: 4px;
}

.zoom-controls button {
  border: 1px solid var(--grid-line);
  background: var(--button-bg);
  color: var(--button-text);
  padding: 4px 10px;
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  font-size: 13px;
}

.zoom-controls button.active {
  background: var(--bar-fill);
  color: var(--accent-text);
  border-color: var(--bar-fill);
}

#status {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

main {
  padding: 12px 16px;
}

.gantt-wrap {
  display: flex;
  border: 1px solid var(--grid-line);
  max-width: 100%;
}

.gantt-labels {
  flex: 0 0 auto;
  width: var(--label-width);
  border-right: 1px solid var(--grid-line);
}

.gantt-labels-spacer {
  border-bottom: 1px solid var(--grid-line);
}

.gantt-bucket-row {
  display: flex;
  align-items: center;
  padding-left: 8px;
  font-size: 12px;
  font-weight: 600;
  background: var(--bucket-bg);
  border-bottom: 1px solid var(--grid-line);
}

.gantt-task-row {
  display: flex;
  align-items: center;
  padding-left: 18px;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-bottom: 1px solid var(--row-border);
}

.gantt-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x;
  flex: 1 1 auto;
  min-width: 0;
  position: relative;
}

.gantt-axis {
  position: sticky;
  top: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--grid-line);
  z-index: 1;
}

.gantt-axis-tick {
  position: absolute;
  top: 0;
  height: 100%;
  display: flex;
  align-items: center;
  padding-left: 4px;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  border-left: 1px solid var(--grid-line);
}

.gantt-axis-today {
  position: absolute;
  top: 0;
  height: 100%;
  display: flex;
  align-items: center;
  padding-left: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--today-line);
  white-space: nowrap;
}

.grid-line {
  stroke: var(--grid-line);
  stroke-width: 1;
}

.bar-track {
  fill: var(--bar-track);
}

.bar-fill {
  fill: var(--bar-fill);
}

.bar-label {
  font-size: 11px;
  fill: var(--text);
}

.milestone {
  fill: var(--milestone);
}

.today-line {
  stroke: var(--today-line);
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
}

.unscheduled-panel {
  margin-top: 16px;
  border: 1px solid var(--grid-line);
  background: var(--surface);
  padding: 10px 14px;
}

.unscheduled-panel h3 {
  font-size: 13px;
  margin: 0 0 6px;
}

.unscheduled-panel ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
}

.error-view {
  border: 1px solid var(--grid-line);
  background: var(--surface);
  padding: 16px;
  text-align: center;
}

.error-view p {
  font-size: 13px;
  color: var(--text);
  margin: 0 0 12px;
}

.error-view button {
  border: 1px solid var(--grid-line);
  background: var(--button-bg);
  color: var(--button-text);
  padding: 8px 16px;
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  font-size: 13px;
}

button:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

@media (max-width: 600px) {
  :root {
    --label-width: 120px;
  }

  .topbar {
    padding: 8px 12px;
  }

  main {
    padding: 8px 12px;
  }

  .gantt-task-row {
    padding-left: 8px;
  }
}

.gantt-row-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}