/* 图片形状裁剪工具 */
.isc-grid { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 20px; align-items: start; }
.isc-panel { background: var(--bg); border: 1px solid var(--rule); border-radius: var(--radius-md); padding: 20px; }
.isc-section { margin-bottom: 18px; }
.isc-section:last-child { margin-bottom: 0; }
.isc-section h3 { display: flex; align-items: center; gap: 6px; font-size: .95rem; margin: 0 0 12px; }
.isc-section h3 i { color: var(--accent); }

/* 上传区域 */
.isc-upload {
  border: 2px dashed var(--rule);
  border-radius: var(--radius-sm);
  padding: 22px 12px;
  text-align: center;
  cursor: pointer;
  transition: all .25s;
  background: var(--bg2);
}
.isc-upload:hover, .isc-upload.dragover { border-color: var(--accent); background: var(--accent-soft); }
.isc-upload i { font-size: 1.8rem; color: var(--accent); margin-bottom: 8px; display: block; }
.isc-upload p { color: var(--ink); font-size: .85rem; margin: 0 0 4px; }
.isc-hint { color: var(--muted); font-size: .75rem; }

/* 形状网格 */
.isc-shape-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.isc-shape-btn {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 10px 4px;
  border: 1.5px solid var(--rule); border-radius: var(--radius-sm);
  background: var(--bg2); color: var(--ink);
  cursor: pointer; transition: all .2s;
  font-family: var(--font);
}
.isc-shape-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.isc-shape-btn.active { border-color: var(--accent); background: var(--accent-soft); }
.isc-shape-preview {
  width: 34px; height: 34px;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.isc-shape-preview i { font-size: 1.2rem; color: #fff; }
.isc-shape-name { font-size: .72rem; color: var(--muted); font-weight: 500; }
.isc-shape-btn.active .isc-shape-name { color: var(--accent); font-weight: 600; }

.isc-shape-square { border-radius: 4px; }
.isc-shape-circle { border-radius: 50%; }
.isc-shape-triangle { clip-path: polygon(50% 0%, 0% 100%, 100% 100%); }
.isc-shape-heart { clip-path: path('M50 25C20 0 0 20 0 45c0 35 50 55 50 55s50-20 50-55C100 20 80 0 50 25z'); }
.isc-shape-star { clip-path: polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%); }
.isc-shape-diamond { clip-path: polygon(50% 0%,100% 50%,50% 100%,0% 50%); }
.isc-shape-sawtooth { clip-path: polygon(0% 0%,20% 0%,20% 25%,40% 25%,40% 0%,60% 0%,60% 25%,80% 25%,80% 0%,100% 0%,100% 100%,80% 100%,80% 75%,60% 75%,60% 100%,40% 100%,40% 75%,20% 75%,20% 100%,0% 100%); }
.isc-shape-freehand { background: var(--accent2); }

/* 表单行 */
.isc-form-row { margin-bottom: 12px; }
.isc-form-row label { display: flex; align-items: center; justify-content: space-between; font-size: .82rem; color: var(--muted); margin-bottom: 5px; font-weight: 500; }
.isc-form-row output { color: var(--accent); font-weight: 600; }
.isc-form-row input[type="range"] { width: 100%; accent-color: var(--accent); }

/* 相框按钮 */
.isc-frame-group { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.isc-frame-btn {
  padding: 8px 4px;
  border: 1.5px solid var(--rule); border-radius: var(--radius-sm);
  background: var(--bg2); color: var(--muted);
  font-size: .8rem; font-weight: 500; cursor: pointer; transition: all .2s;
  font-family: var(--font);
}
.isc-frame-btn:hover { border-color: var(--accent); color: var(--accent); }
.isc-frame-btn.isc-frame-active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }

/* 预览区域 */
.isc-canvas-area {
  min-height: 420px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg2);
  border: 1.5px dashed var(--rule); border-radius: var(--radius-sm);
  overflow: hidden; position: relative;
}
.isc-empty-state { text-align: center; color: var(--muted); padding: 40px 20px; }
.isc-empty-state i { font-size: 3rem; color: var(--rule); margin-bottom: 12px; display: block; }
.isc-empty-state p { font-size: .85rem; margin: 0; }
.isc-workspace { position: relative; width: 100%; height: 100%; min-height: 420px; }
.isc-workspace canvas { max-width: 100%; max-height: 100%; }

/* 操作按钮 */
.isc-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.isc-actions .btn { flex: 1; min-width: 90px; }

/* 提示 */
.isc-tips { margin-top: 18px; border-top: 1px solid var(--rule); padding-top: 16px; }
.isc-tips h4 { display: flex; align-items: center; gap: 6px; font-size: .9rem; margin: 0 0 12px; }
.isc-tips h4 i { color: var(--accent); }
.isc-tip-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.isc-tip-item { background: var(--bg2); border-radius: var(--radius-sm); padding: 10px 12px; border-left: 3px solid var(--accent); }
.isc-tip-item strong { display: flex; align-items: center; gap: 6px; font-size: .82rem; color: var(--ink); margin-bottom: 3px; }
.isc-tip-item strong i { color: var(--accent); }
.isc-tip-item p { font-size: .75rem; color: var(--muted); margin: 0; line-height: 1.5; }

/* 消息提示 */
.isc-error {
  background: rgba(231, 76, 60, .12); color: var(--danger);
  border: 1px solid rgba(231, 76, 60, .3);
  padding: 10px 14px; border-radius: var(--radius-sm);
  margin-bottom: 12px; font-size: .85rem;
}
.isc-success {
  background: var(--accent-soft); color: var(--accent);
  border: 1px solid rgba(66, 185, 131, .3);
  padding: 10px 14px; border-radius: var(--radius-sm);
  margin-bottom: 12px; font-size: .85rem;
}

@media (max-width: 900px) {
  .isc-grid { grid-template-columns: 1fr; }
  .isc-shape-grid { grid-template-columns: repeat(4, 1fr); }
  .isc-tip-grid { grid-template-columns: 1fr; }
  .isc-canvas-area { min-height: 320px; }
  .isc-workspace { min-height: 320px; }
}