:root {
  --border: #d0d5dc;
  --bg: #ffffff;
  --accent: #2563eb;
  --danger: #dc2626;
  --muted: #6b7280;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #1f2937;
}

body {
  display: flex;
  flex-direction: column;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.toolbar h1 { font-size: 16px; margin: 0; margin-right: auto; }

.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

button {
  padding: 7px 14px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

button:hover { border-color: var(--accent); color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { filter: brightness(1.08); color: #fff; }
button.danger { color: var(--danger); }
button.danger:hover { border-color: var(--danger); }

#f-lang, #f-export {
  padding: 5px 6px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.nav-link {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}
.nav-link:hover { border-color: var(--accent); background: #f0f4ff; }

.toolbar label.tool {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  white-space: nowrap;
}
.toolbar label.tool input[type="number"] {
  width: 56px;
  padding: 5px 6px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.layout {
  flex: 1;
  display: flex;
  min-height: 0;
}

.canvas-wrap {
  flex: 1;
  position: relative;
  padding: 16px;
  overflow: auto;
  background: #eef1f5;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

#board {
  max-width: 100%;
  max-height: calc(100vh - 90px);
  background: #fff;
  box-shadow: 0 1px 6px rgba(0,0,0,0.15);
  cursor: grab;
  touch-action: none;
  overflow: visible;
  transform-origin: 0 0;
}
#board.locked { cursor: crosshair; }
#board.dragging { cursor: grabbing; }
#board.cropping { cursor: crosshair; }
.crop-handle { cursor: move; }

.hint {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  border-radius: 6px;
  font-size: 12px;
  pointer-events: none;
}

.marker circle[data-part="pin"] { cursor: move; }
.pin-tag { cursor: move; }
.marker.selected circle[data-part="pin"] { stroke: #f59e0b; stroke-width: 4; }
.marker.selected .pin-tag rect { stroke: #f59e0b; stroke-width: 2.5; }

.pin-label {
  font-family: ui-monospace, Consolas, "Microsoft YaHei", monospace;
  font-weight: 600;
}

.panel {
  width: 280px;
  border-left: 1px solid var(--border);
  background: var(--bg);
  overflow-y: auto;
  padding: 16px;
}

.panel-section { margin-bottom: 24px; }
.panel-section h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 10px;
}

.panel label {
  display: block;
  font-size: 13px;
  margin-bottom: 12px;
}
.num-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.num-row label {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}
.panel input[type="number"] {
  width: 100%;
  margin-top: 4px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}
.panel label.check {
  display: flex;
  align-items: center;
  gap: 6px;
}

.panel input[type="text"],
.panel select {
  width: 100%;
  margin-top: 4px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}

.muted { color: var(--muted); font-size: 13px; line-height: 1.6; }

.legend { list-style: none; margin: 0; padding: 0; }
.legend li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 13px;
}
.legend .swatch {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.2);
}
.legend .name { color: var(--muted); }