:root {
  --bg: #f5f5f2;
  --panel: #ffffff;
  --panel-alt: #f8f7f3;
  --border: #d4d0c6;
  --border-strong: #8f8878;
  --text: #222222;
  --muted: #66604f;
  --accent-soft: #f3e6c7;
  --chip-bg: #eee7d7;
  --button-bg: #f0ede6;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.45;
}

.page-header {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.25rem 1rem;
}

.page-header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 4vw, 3rem);
}

.page-header p {
  margin: 0;
  max-width: 60rem;
  color: var(--muted);
}

.page-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  display: grid;
  gap: 1rem;
}

.panel {
  min-width: 0;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  margin: 0;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.field {
  display: grid;
  align-content: start;
  gap: 0.35rem;
}

label {
  font-size: 0.92rem;
  font-weight: 600;
}

select,
button,
input {
  font: inherit;
}

select,
input[type="text"],
input[type="file"] {
  width: 100%;
  height: 3.25rem;
  padding: 0.6rem 0.75rem;
  color: var(--text);
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
}

input[type="color"] {
  width: 100%;
  height: 3.25rem;
  padding: 0.25rem;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  color: var(--text);
  background: var(--button-bg);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  cursor: pointer;
}

button:hover {
  background: var(--accent-soft);
}

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

.status-text {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 1rem;
  align-items: start;
}

.image-panel {
  overflow: hidden;
}

.canvas-shell {
  display: grid;
  align-items: start;
  justify-items: center;
  min-height: 28rem;
  max-height: 78vh;
  overflow: auto;
  background:
    linear-gradient(45deg, #e6e2d8 25%, transparent 25%),
    linear-gradient(-45deg, #e6e2d8 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e6e2d8 75%),
    linear-gradient(-45deg, transparent 75%, #e6e2d8 75%);
  background-color: #f8f7f3;
  background-position:
    0 0,
    0 8px,
    8px -8px,
    -8px 0;
  background-size: 16px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

#marker-canvas {
  display: block;
  height: auto;
  cursor: crosshair;
}

.canvas-shell.is-pan #marker-canvas {
  cursor: grab;
  touch-action: none;
}

.canvas-shell.is-panning #marker-canvas {
  cursor: grabbing;
}

.zoom-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.tool-toggle {
  display: inline-flex;
  padding: 0.2rem;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.tool-toggle button {
  min-height: 2.1rem;
  border-color: transparent;
  background: transparent;
}

.tool-toggle button.is-active {
  border-color: var(--border-strong);
  background: var(--accent-soft);
}

.zoom-toolbar button {
  min-width: 2.5rem;
  padding: 0.45rem 0.75rem;
}

.zoom-field {
  display: flex;
  flex: 1 1 16rem;
  align-items: center;
  gap: 0.6rem;
  min-width: 12rem;
}

.zoom-field span {
  color: var(--muted);
  font-weight: 600;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--border-strong);
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: var(--chip-bg);
  border: 1px solid var(--border);
  font-size: 0.92rem;
}

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

.polygon-list {
  display: grid;
  gap: 0.5rem;
}

.polygon-item {
  display: grid;
  grid-template-columns: 1rem 1fr auto;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.7rem;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.polygon-item.is-active {
  border-color: var(--border-strong);
  background: var(--accent-soft);
}

.swatch {
  width: 1rem;
  height: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.25);
  border-radius: 999px;
}

.polygon-title {
  min-width: 0;
  overflow: hidden;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.polygon-meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.export-title {
  margin-top: 1rem !important;
}

.export-row {
  display: grid;
}

@media (max-width: 900px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .canvas-shell {
    min-height: 18rem;
  }
}