/* ===== 工具页专用样式 ===== */

main.tool-main {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: 1fr 320px;
  z-index: 1;
}

/* Stage */
.stage {
  position: relative;
  overflow: auto;
  padding-top: 60px;
  padding-bottom: 28px;
  padding-left: 28px;
  padding-right: 28px;
  text-align: center;
  background:
    linear-gradient(45deg, rgba(255,255,255,0.015) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.015) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.015) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.015) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  background-color: var(--bg-primary);
}

.dropzone {
  display: inline-block;
  width: 80%;
  max-width: 480px;
  margin: calc(50vh - 160px) auto 0;
  border: 1.5px dashed var(--border-light);
  border-radius: var(--radius-xl);
  padding: 60px 32px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  background: rgba(255,255,255,0.01);
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  color: var(--text-secondary);
  background: rgba(245, 184, 0, 0.04);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(245, 184, 0, 0.08);
}

.dropzone .icon {
  font-size: 48px;
  margin-bottom: 16px;
  filter: grayscale(0.3);
}

.dropzone p {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.dropzone small {
  color: var(--text-faint);
  font-size: 12px;
}

.canvas-wrap {
  position: relative;
  display: none;
  border-radius: 4px;
  overflow: hidden;
  line-height: 0;
  cursor: default;
}

#imageCanvas { display: block; max-width: none; margin: 0 auto; }

/* Slice boundary lines */
.slice-line {
  position: absolute;
  left: 0; right: 0;
  height: 0;
  border-top: 2px solid var(--accent);
  box-shadow: 0 0 8px rgba(245,184,0,.5), 0 1px 3px rgba(0,0,0,.6);
  pointer-events: none;
  z-index: 5;
}

.slice-line.first {
  border-top-color: var(--green);
  box-shadow: 0 0 6px rgba(74,222,128,.5);
}

.slice-line.dragging {
  border-top-color: var(--red);
  box-shadow: 0 0 10px rgba(255,107,107,.7);
  z-index: 10;
}

.slice-handle {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 22px;
  background: var(--accent);
  color: #1a1d24;
  font-size: 10px;
  font-weight: 800;
  line-height: 22px;
  text-align: center;
  border-radius: 4px;
  cursor: ns-resize;
  pointer-events: auto;
  user-select: none;
  box-shadow: 0 2px 8px rgba(0,0,0,.5);
  transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: var(--font-mono);
}

.slice-handle::before { content: "⠿"; margin-right: 3px; opacity: 0.5; }
.slice-handle:hover { transform: translateX(-50%) scale(1.12); }
.slice-line.first .slice-handle { background: var(--green); }
.slice-line.dragging .slice-handle { background: var(--red); color: #fff; }

.slice-del {
  position: absolute;
  top: -10px;
  right: 4px;
  width: 20px;
  height: 20px;
  background: var(--red);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  line-height: 20px;
  text-align: center;
  border-radius: 50%;
  cursor: pointer;
  pointer-events: auto;
  user-select: none;
  box-shadow: 0 2px 8px rgba(0,0,0,.5);
  transition: transform 0.15s, background 0.15s;
  opacity: 0;
}

.slice-line:hover .slice-del { opacity: 1; }
.slice-del:hover { transform: scale(1.15); background: #ff4444; }

/* Sidebar */
aside {
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  padding-top: 60px;
  padding-bottom: 20px;
  padding-left: 18px;
  padding-right: 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.group h3 {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-faint);
  margin-bottom: 10px;
  font-weight: 600;
}

.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.seg button {
  padding: 8px 4px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
  font-weight: 500;
}

.seg button:hover { border-color: var(--border-light); color: var(--text-secondary); }
.seg button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1d24;
  font-weight: 700;
}

.panel { display: none; }
.panel.active { display: block; }

.num-input {
  display: flex;
  align-items: center;
  gap: 8px;
}

.num-input input {
  flex: 1;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  width: 100%;
  font-family: var(--font-mono);
}

.num-input input:focus { outline: none; border-color: var(--accent); }
.num-input .unit { color: var(--text-dim); font-size: 12px; }
.hint { font-size: 11px; color: var(--text-faint); margin-top: 8px; line-height: 1.6; }

.check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}

.check input { accent-color: var(--accent); }

.btn-row { display: flex; gap: 6px; }
.tool-btn {
  flex: 1;
  padding: 9px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 500;
}

.tool-btn:hover:not(:disabled) { border-color: var(--border-light); background: var(--bg-tertiary); }
.tool-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.tool-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1d24;
  font-weight: 700;
}

.tool-btn.primary:hover:not(:disabled) { background: var(--accent-hover); }
.tool-btn.danger { color: var(--red); border-color: rgba(255,107,107,0.2); }
.tool-btn.danger:hover:not(:disabled) { background: rgba(255,107,107,0.08); }

.info {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.9;
  font-family: var(--font-mono);
  font-size: 11px;
}

.info span { color: var(--text-secondary); font-variant-numeric: tabular-nums; }

#previewList {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 340px;
  overflow-y: auto;
  padding-right: 2px;
}

#previewList::-webkit-scrollbar { width: 4px; }
#previewList::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 2px; }

#previewList .placeholder {
  color: var(--text-faint);
  font-size: 12px;
  text-align: center;
  padding: 28px 0;
}

.thumb {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  transition: border-color 0.15s;
}

.thumb:hover { border-color: var(--border-light); }
.thumb.unchecked { opacity: 0.4; }
.thumb .pick {
  margin-top: 4px;
  accent-color: var(--accent);
  width: 14px; height: 14px;
  flex: 0 0 auto;
}

.thumb .imgwrap {
  width: 52px;
  flex: 0 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  background: #fff;
  border-radius: 3px;
  padding: 2px;
  overflow: hidden;
}

.thumb .imgwrap img {
  display: block;
  max-width: 100%;
  max-height: 72px;
  width: auto;
  height: auto;
}

.thumb .meta {
  flex: 1;
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.5;
  min-width: 0;
}

.thumb .meta b {
  color: var(--text-secondary);
  font-size: 12px;
  display: block;
  margin-bottom: 2px;
  font-weight: 600;
}

.thumb .dl {
  background: transparent;
  border: none;
  color: var(--text-faint);
  width: 24px; height: 24px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  flex: 0 0 auto;
  transition: all 0.15s;
}

.thumb .dl:hover { color: var(--accent); background: var(--bg-tertiary); }

#fileInput { display: none; }
.progress {
  font-size: 11px;
  color: var(--green);
  margin-top: 6px;
  min-height: 14px;
}
.progress.error { color: var(--red); }

.progress-bar {
  margin-top: 8px;
  height: 3px;
  background: var(--bg-primary);
  border-radius: 2px;
  overflow: hidden;
  display: none;
}

.progress-bar.show { display: block; }
.progress-bar > div {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.2s;
  border-radius: 2px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-actions {
  display: flex;
  gap: 6px;
  font-size: 10px;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
}

.preview-actions a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}

.preview-actions a:hover { color: var(--accent); }
.preview-actions span { color: var(--text-faint); }

@media (max-width: 760px) {
  main.tool-main { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  aside {
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: 45vh;
    padding-top: 16px;
  }
  .stage { padding-top: 56px; }
  .dropzone { margin-top: 40px; padding: 40px 24px; }
}