:root {
  --bg: #0f1115;
  --panel: #161a22;
  --panel-2: #1c2230;
  --text: #e7e7ea;
  --muted: #a5abb6;
  --accent: #4cc2ff;
  --danger: #ff5b5b;
  --ok: #4caf50;
  --card: #1b2230;
  --border: #2a3242;
  --shadow: 0 4px 12px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', Arial,
    'Noto Sans', 'PingFang SC', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
}
.app-header h1 { font-size: 18px; margin: 0 10px 0 0; }
.file-status { color: var(--muted); font-size: 12px; }
.left { display: flex; align-items: center; gap: 8px; }
.toolbar { display: flex; align-items: center; gap: 8px; }
.sep { width: 1px; height: 24px; background: var(--border); margin: 0 6px; }

.btn {
  cursor: pointer;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 6px;
  box-shadow: var(--shadow);
}
.btn.small { padding: 4px 8px; font-size: 12px; }
.btn.primary { background: var(--accent); color: #001525; border-color: #2a93c4; }
.btn.danger { background: var(--danger); color: #1b0000; border-color: #a33939; }
.icon-btn { cursor: pointer; background: transparent; color: var(--text); border: none; font-size: 16px; }

input, select, textarea {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}
.actor { width: 200px; }
.search { width: 200px; }
.category-filter { max-width: 220px; }

.app-main { display: grid; grid-template-columns: 280px 1fr; height: calc(100vh - 56px); }
.side-panel { overflow: auto; padding: 12px; border-right: 1px solid var(--border); background: var(--panel); }
.side-panel h3 { margin: 14px 0 8px; font-size: 14px; color: var(--muted); font-weight: 600; }
.categories { display: flex; flex-direction: column; gap: 6px; }
.category-item { display: flex; align-items: center; gap: 6px; background: var(--panel-2); padding: 6px; border: 1px solid var(--border); border-radius: 6px; }
.swatch { width: 14px; height: 14px; border-radius: 4px; border: 1px solid #00000033; display: inline-block; }
.category-item input[type="text"] { flex: 1; }
.layout-info { font-size: 12px; color: var(--muted); line-height: 1.6; }
.history { font-size: 12px; display: flex; flex-direction: column; gap: 8px; }
.history .event { padding: 6px 8px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px; }

.board {
  overflow: auto;
  padding: 12px;
  display: grid;
  grid-auto-rows: 1fr;
  grid-auto-flow: column;
  gap: 12px;
}
.board-column { display: flex; flex-direction: column; gap: 12px; min-width: 320px; }
.stage { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; display: flex; flex-direction: column; }
.stage-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.stage-title { font-weight: 600; }
.stage-actions { display: flex; align-items: center; gap: 6px; }
.task-list { padding: 8px; display: flex; flex-direction: column; gap: 8px; min-height: 60px; }
.task-list.drag-over { outline: 2px dashed var(--accent); outline-offset: -4px; border-radius: 6px; }

.task { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 8px; box-shadow: var(--shadow); display: grid; grid-template-columns: 20px 1fr auto; align-items: center; gap: 8px; }
.task .grab { cursor: grab; user-select: none; opacity: 0.8; }
.task .title { font-weight: 600; }
.task .meta { font-size: 12px; color: var(--muted); }
.task .chip { font-size: 11px; padding: 2px 6px; border-radius: 10px; border: 1px solid #00000033; white-space: nowrap; }
.task .actions { display: flex; gap: 4px; }

.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal.hidden { display: none; }
.modal-content { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; width: 720px; max-width: 95vw; max-height: 90vh; display: flex; flex-direction: column; }
.modal-content.large { width: 1000px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.modal-body { padding: 12px; overflow: auto; }
.modal-footer { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--border); }
.spacer { flex: 1; }

.form-row { display: grid; grid-template-columns: 90px 1fr; align-items: start; gap: 10px; margin-bottom: 10px; }
.form-row label { font-size: 12px; color: var(--muted); padding-top: 6px; }
.steps { display: flex; flex-direction: column; gap: 6px; }
.step-item { display: grid; grid-template-columns: 24px 1fr 24px; align-items: center; gap: 8px; }
.step-item input[type="text"] { width: 100%; }
.checkbox { display: inline-flex; align-items: center; gap: 6px; margin-left: 12px; }

.diff-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-bottom: 10px; }
.summary-card { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 8px; }
.summary-card h4 { margin: 2px 0 8px; font-size: 13px; color: var(--muted); }
.summary-card .num { font-size: 22px; font-weight: 700; }
.diff-details { display: flex; flex-direction: column; gap: 8px; }
.diff-item { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace; font-size: 12px; white-space: pre-wrap; }

@media (max-width: 1200px) {
  .app-main { grid-template-columns: 1fr; }
  .side-panel { display: none; }
}