:root {
  --bg: #1b1f27;
  --panel: #232936;
  --panel-2: #2b3242;
  --text: #e8ecf3;
  --muted: #9aa5b5;
  --accent: #4c8dff;
  --border: #3a4252;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
}

h1 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 600;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.toolbar .sep {
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 0 4px;
}

.row-tools { margin-top: 8px; }
.tool-label { color: var(--muted); margin-right: 2px; }
button.tool.active { background: var(--accent); border-color: var(--accent); color: #fff; }

button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 13px;
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.toggle.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.zoom-label { min-width: 44px; text-align: center; color: var(--muted); }

.slider-label { display: inline-flex; align-items: center; gap: 4px; color: var(--muted); }
.slider-label input[type="range"] { width: 90px; }
.slider-label .val { min-width: 30px; color: var(--text); }

.mini { display: inline-flex; align-items: center; gap: 4px; color: var(--muted); }
.mini input[type="range"] { width: 80px; }
.mini .val { min-width: 26px; color: var(--text); }

input[type="color"] {
  width: 34px;
  height: 26px;
  padding: 1px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel-2);
}

input[type="text"], input[type="number"].num {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 4px 8px;
  font-size: 13px;
}

input[type="number"].num { width: 56px; }

select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 4px 6px;
  font-size: 13px;
}

main { padding: 16px; }

.editor-layout {
  display: flex;
  gap: 16px;
  padding: 16px;
}
.editor-layout main { padding: 0; flex: 1; min-width: 0; }

.layer-panel {
  width: 248px;
  flex-shrink: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  align-self: flex-start;
  max-height: 78vh;
  overflow-y: auto;
}
.layer-panel h2 {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--text);
}
.layer-hint { font-size: 12px; color: var(--muted); margin: 0 0 10px; line-height: 1.5; }
#layerList { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.layer-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-2);
  cursor: pointer;
  font-size: 13px;
}
.layer-row:hover { border-color: var(--accent); }
.layer-row.active { border-color: var(--accent); background: rgba(76, 141, 255, 0.18); }
.layer-row.locked { opacity: 0.55; cursor: default; }
.layer-row canvas {
  width: 44px;
  height: 33px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: #10131a;
  flex-shrink: 0;
}
.layer-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-controls { display: flex; flex-direction: column; gap: 8px; }
.layer-controls .btn-row { display: flex; flex-wrap: wrap; gap: 6px; }
.layer-controls button { padding: 4px 9px; font-size: 12px; }
.layer-controls button.danger { color: #ff8585; border-color: #7a4444; }
.layer-controls button.danger:hover { border-color: #ff6b6b; }
.layer-controls button:disabled { opacity: 0.4; cursor: not-allowed; }

.canvas-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 320px;
}

#editorCanvas {
  display: none;
  background-image: conic-gradient(#262b36 0 25%, #1d212b 0 50%, #262b36 0 75%, #1d212b 0);
  background-size: 20px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  max-width: 100%;
  max-height: 72vh;
  width: auto;
  height: auto;
  cursor: default;
  touch-action: none;
}

#brushCursor {
  position: absolute;
  border: 1.5px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.65), inset 0 0 0 1px rgba(0, 0, 0, 0.65);
  pointer-events: none;
  z-index: 4;
  transform: translate(-50%, -50%);
}

#editorCanvas.active { display: block; }

#placeholder {
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 60px 40px;
  text-align: center;
  color: var(--muted);
  max-width: 640px;
  width: 100%;
}

#placeholder .ph-title { font-size: 16px; margin: 0 0 10px; color: var(--text); }
#placeholder .ph-hint { font-size: 13px; margin: 4px 0; }

#cropActions {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 5;
}

.crop-hint { font-size: 12px; color: var(--muted); }

#status {
  margin: 14px auto 0;
  max-width: 720px;
  text-align: center;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text);
}

#status[hidden] { display: none; }