:root {
  --bg: #14161c;
  --panel: #1d2129;
  --panel-2: #232834;
  --border: #2e3542;
  --text: #e8eaee;
  --text-dim: #9aa3b2;
  --accent: #5b8cff;
  --accent-hover: #6f9bff;
  --danger: #e05252;
  --ok: #43c47f;
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  font-size: 14px;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  height: 56px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; }
.brand .logo { font-size: 22px; }
.brand .subtitle { color: var(--text-dim); font-weight: 400; font-size: 13px; }
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.total-duration { color: var(--text-dim); }

/* ---------- 布局 ---------- */
.layout {
  display: grid;
  grid-template-columns: 340px 1fr 300px;
  gap: 12px;
  padding: 12px;
  height: calc(100vh - 56px);
  min-height: 0;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.panel h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

/* ---------- 左栏：上传 + 列表 ---------- */
.left-panel { overflow-y: auto; }
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 12px;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(91, 140, 255, 0.06);
}
.dz-icon { font-size: 30px; margin-bottom: 6px; }
.dropzone p { color: var(--text-dim); margin: 6px 0; }
.hint { font-size: 12px; color: var(--text-dim); line-height: 1.6; }

.image-list { display: flex; flex-direction: column; gap: 8px; }
.image-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.image-card .thumb {
  width: 56px; height: 56px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
  background: #111;
}
.image-card .meta { flex: 1; min-width: 0; }
.image-card .name {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}
.image-card .row { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.image-card label { font-size: 12px; color: var(--text-dim); display: flex; align-items: center; gap: 4px; }
.image-card input[type="number"] {
  width: 58px;
  background: #161a22;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 3px 6px;
  font-size: 13px;
}
.image-card select {
  background: #161a22;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 3px 4px;
  font-size: 12px;
}
.image-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
}
.card-actions { display: flex; gap: 4px; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 24px; height: 24px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); }
.icon-btn.danger:hover { color: #fff; border-color: var(--danger); background: var(--danger); }

.boundary-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 2px 2px 66px;
  color: var(--text-dim);
  font-size: 12px;
}
.boundary-row select {
  background: #161a22;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 2px 4px;
  font-size: 12px;
}
.empty-list {
  color: var(--text-dim);
  text-align: center;
  padding: 20px 0;
  font-size: 13px;
}

/* ---------- 中栏：预览 ---------- */
.center-panel { }
.stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0b0d11;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  min-height: 0;
}
.stage canvas {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  background: #000;
}
.stage-hint { margin-top: 8px; }
.player-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.player-controls input[type="range"] { flex: 1; accent-color: var(--accent); }
.player-controls #timeLabel { color: var(--text-dim); font-size: 12px; min-width: 110px; text-align: right; }

/* ---------- 右栏：设置 ---------- */
.right-panel { overflow-y: auto; }
.form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.form label { display: flex; flex-direction: column; gap: 4px; color: var(--text-dim); font-size: 12px; }
.form select, .form input[type="number"] {
  background: #161a22;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 7px 8px;
  font-size: 13px;
  width: 100%;
}

/* ---------- 按钮 ---------- */
.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ---------- 进度条 ---------- */
.progress { margin-top: 10px; }
.progress-bar {
  height: 8px;
  background: #161a22;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.2s;
}
#exportStatus { display: block; margin-top: 8px; font-size: 12px; color: var(--text-dim); }

/* ---------- 批量生成 ---------- */
.batch-lib {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
  background: #161a22;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
  margin-bottom: 10px;
  word-break: break-all;
}
.batch-lib b { color: var(--text); }
.batch-lib.warn { border-color: #6b5a2a; }
.batch-lib .bad { color: var(--danger); }
.batch-lib .dim { opacity: 0.75; }
.batch-lib code { font-size: 11px; color: var(--accent); }

.batch-thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 5px;
  margin-bottom: 10px;
}
.batch-thumb {
  margin: 0;
  aspect-ratio: 9 / 16;
  border: 1px solid var(--border);
  border-radius: 5px;
  overflow: hidden;
  background: #10131a;
  display: flex;
  align-items: center;
  justify-content: center;
}
.batch-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.batch-thumb.more { font-size: 11px; color: var(--text-dim); }

.batch-actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }.batch-actions .btn { text-decoration: none; display: inline-block; }

#batchSummary { margin: 4px 0 10px; word-break: break-all; }
#batchSummary b { color: var(--text); }

.batch-videos { display: flex; flex-direction: column; gap: 10px; }
.batch-row {
  background: #161a22;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
}
.batch-row.ok { border-color: #2c5f42; }
.batch-row.bad { border-color: #6b2f2f; }
.batch-row-top {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  margin-bottom: 7px;
}
.batch-idx { font-weight: 600; }
.batch-detail { flex: 1; color: var(--text-dim); }
.batch-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 6px;
  font-size: 11px;
  word-break: break-all;
}
.batch-meta .dim { color: var(--text-dim); }
.batch-row .progress-bar { height: 6px; }
.batch-row.ok .progress-fill { background: var(--ok); }
.batch-row.bad .progress-fill { background: var(--danger); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 13px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  z-index: 100;
  max-width: 70vw;
}
.toast.success { border-color: var(--ok); color: var(--ok); }
.toast.error { border-color: var(--danger); color: var(--danger); }
.hidden { display: none !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .layout { grid-template-columns: 1fr 1fr; grid-template-rows: auto 1fr; height: auto; }
  .left-panel { grid-column: 1 / -1; max-height: 300px; }
}