/* ========== 封面工作台 ========== */
.cover {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 16px 8px;
  display: grid;
  grid-template-columns: minmax(0, 460px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}
@media (max-width: 920px) {
  .cover { grid-template-columns: 1fr; }
}

.panel { display: flex; flex-direction: column; gap: 12px; min-width: 0; }

.card {
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: .85rem;
  font-weight: 600;
}
.step {
  flex: none;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  font-size: .72rem;
  color: var(--accent);
  background: var(--accent-weak);
  border-radius: 50%;
}

/* ---------- 素材接入 ---------- */
.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px 12px;
  text-align: center;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  font-size: .82rem;
  color: var(--text-dim);
  transition: border-color .2s, background .2s;
}
.drop.over { border-color: var(--accent); background: var(--accent-weak); }
.drop-icon { font-size: 1.4rem; }
.drop-actions { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.asset-status { margin-top: 10px; font-size: .78rem; color: var(--text-dim); line-height: 1.7; }
.asset-status b { color: var(--text); }

.batch-list {
  margin-top: 10px;
  max-height: 132px;
  overflow-y: auto;
  padding: 8px 10px;
  list-style: none;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  font-size: .76rem;
  color: var(--text-dim);
}
.batch-list li { padding: 2px 0; }
.batch-list li + li { border-top: 1px solid var(--border); }
.progress { margin-top: 8px; font-size: .76rem; color: var(--accent); }

/* ---------- 选主图 ---------- */
.thumb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(58px, 1fr));
  gap: 6px;
  max-height: 224px;
  overflow-y: auto;
  padding: 2px;
}
.thumb {
  position: relative;
  padding: 0;
  aspect-ratio: 2 / 3;
  overflow: hidden;
  background: var(--surface-2);
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
}
.thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.thumb:hover { border-color: var(--border); }
.thumb.active { border-color: var(--accent); }
.thumb-badge {
  position: absolute;
  top: 3px;
  left: 3px;
  padding: 1px 5px;
  font-size: .58rem;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
}
.thumb-index {
  position: absolute;
  right: 3px;
  bottom: 3px;
  padding: 0 4px;
  font-size: .58rem;
  color: #fff;
  background: rgba(0, 0, 0, .45);
  border-radius: 4px;
}
.thumb-hint { margin-top: 8px; font-size: .74rem; color: var(--text-dim); }

/* ---------- 分段选择 ---------- */
.field { margin-top: 12px; }
.field:first-child { margin-top: 0; }
.field-label { display: block; margin-bottom: 5px; font-size: .75rem; color: var(--text-dim); }
.input {
  width: 100%;
  padding: 7px 10px;
  font: inherit;
  font-size: .84rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.input:focus { outline: none; border-color: var(--accent); }

.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg button {
  padding: 6px 12px;
  font: inherit;
  font-size: .8rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.seg button:hover { color: var(--accent); border-color: var(--accent); }
.seg button.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.color-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.color-row input[type='color'] {
  width: 42px;
  height: 30px;
  padding: 0;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.color-row span { font-size: .76rem; color: var(--text-dim); }

.switch { display: flex; align-items: center; gap: 7px; margin-top: 10px; font-size: .8rem; color: var(--text-dim); }
.switch input { width: 15px; height: 15px; accent-color: var(--accent); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* ---------- 预览台 ---------- */
.stage {
  position: sticky;
  top: 76px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stage-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: .8rem;
  color: var(--text-dim);
}
.stage-label { font-weight: 600; color: var(--text); }
#preview {
  display: block;
  width: 100%;
  height: auto;
  max-height: 68vh;
  object-fit: contain;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.stage-actions { display: flex; gap: 10px; }
.stage-note { font-size: .72rem; color: var(--text-dim); text-align: center; }

/* ---------- 预设封面库 ---------- */
.card-title { flex-wrap: wrap; }
.card-tag {
  padding: 1px 7px;
  font-size: .68rem;
  font-weight: 400;
  color: var(--accent);
  background: var(--accent-weak);
  border-radius: 999px;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 8px;
}
.preset-card {
  padding: 0 0 5px;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.preset-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(124, 92, 255, .16); }
.preset-card canvas { display: block; width: 100%; height: auto; background: var(--surface-2); }
.preset-card span {
  display: block;
  padding: 4px 4px 0;
  font-size: .68rem;
  color: var(--text-dim);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.preset-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.preset-actions .input { flex: 1 1 130px; width: auto; }
.preset-actions .btn-primary,
.preset-actions .btn-ghost,
.preset-actions label.btn-ghost { padding: 7px 12px; font-size: .78rem; white-space: nowrap; cursor: pointer; }
.preset-msg { margin-top: 8px; font-size: .74rem; color: var(--text-dim); line-height: 1.6; }

/* ---------- 细节调整控件 ---------- */
.ctl-group { border-top: 1px solid var(--border); }
.ctl-group:first-child { border-top: 0; }
.ctl-group summary {
  padding: 9px 2px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.ctl-group summary::-webkit-details-marker { display: none; }
.ctl-group summary::before {
  content: '▸';
  font-size: .7rem;
  color: var(--text-dim);
  transition: transform .2s;
}
.ctl-group[open] summary::before { transform: rotate(90deg); }
.ctl-body { padding: 2px 2px 10px; }

.ctl-row {
  display: grid;
  grid-template-columns: 84px 1fr 46px;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}
.ctl-name { font-size: .74rem; color: var(--text-dim); }
.ctl-value { font-size: .72rem; color: var(--text-dim); text-align: right; font-variant-numeric: tabular-nums; }

.ctl-row input[type='range'] {
  width: 100%;
  height: 4px;
  background: var(--surface-2);
  border-radius: 999px;
  appearance: none;
  cursor: pointer;
}
.ctl-row input[type='range']::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}
.ctl-row input[type='checkbox'] {
  grid-column: 2 / span 2;
  justify-self: start;
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}
.ctl-row input[type='color'] {
  grid-column: 2 / span 2;
  justify-self: start;
  width: 54px;
  height: 26px;
  padding: 0;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.ctl-row select {
  grid-column: 2 / span 2;
  width: 100%;
  padding: 5px 8px;
  font: inherit;
  font-size: .78rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

@media (max-width: 920px) {
  .stage { position: static; }
}