.sealcut-page {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #0f172a;
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  min-height: 100vh;
}

.sealcut-header {
  border-bottom: 1px solid #dbe4ff;
  background: #ffffffcc;
  backdrop-filter: blur(6px);
}

.sealcut-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.sealcut-title {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
}

.sealcut-subtitle {
  margin: 10px 0 0;
  max-width: 860px;
  color: #334155;
  line-height: 1.6;
}

.sealcut-back-link {
  flex-shrink: 0;
  text-decoration: none;
  color: #1d4ed8;
  font-weight: 600;
}

.sealcut-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 20px 40px;
}

.sealcut-privacy {
  margin: 0 0 16px;
  padding: 10px 12px;
  border: 1px solid #c7d2fe;
  border-radius: 10px;
  background: #eef2ff;
  color: #1e3a8a;
  font-size: 14px;
}

.sealcut-layout {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sealcut-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.sealcut-card h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.sealcut-dropzone {
  border: 2px dashed #cbd5e1;
  border-radius: 12px;
  min-height: 132px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: #f8fafc;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.sealcut-dropzone:hover,
.sealcut-dropzone.is-dragover {
  border-color: #2563eb;
  background: #eff6ff;
}

.sealcut-dropzone strong {
  font-size: 16px;
}

.sealcut-dropzone span {
  color: #475569;
  font-size: 13px;
}

.sealcut-file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.sealcut-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.sealcut-btn {
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  cursor: pointer;
}

.sealcut-btn-primary {
  background: #dc2626;
  color: #fff;
  border-color: #dc2626;
}

.sealcut-btn-primary:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.sealcut-btn-light {
  background: #fff;
  color: #334155;
}

.sealcut-meta-list {
  margin: 0;
  padding: 0;
}

.sealcut-meta-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #f1f5f9;
  padding: 10px 0;
}

.sealcut-meta-item:last-child {
  border-bottom: none;
}

.sealcut-meta-item dt {
  color: #64748b;
}

.sealcut-meta-item dd {
  margin: 0;
  font-weight: 600;
}

.sealcut-tuning-tip {
  margin: 0 0 10px;
  color: #475569;
  font-size: 13px;
  line-height: 1.5;
}

.sealcut-presets {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 8px;
}

.sealcut-preset-btn {
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #f8fafc;
  color: #334155;
  padding: 8px 10px;
  font-size: 13px;
  cursor: pointer;
}

.sealcut-preset-btn.is-active {
  border-color: #dc2626;
  background: #fef2f2;
  color: #b91c1c;
  font-weight: 600;
}

.sealcut-control {
  margin-top: 10px;
}

.sealcut-control-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 14px;
}

.sealcut-control-head label {
  color: #334155;
  font-weight: 600;
}

.sealcut-control-head span {
  color: #dc2626;
  font-variant-numeric: tabular-nums;
}

.sealcut-control input[type="range"] {
  width: 100%;
}

.sealcut-preview-box {
  min-height: 270px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.sealcut-result-bg {
  background-image:
    linear-gradient(45deg, #f1f5f9 25%, transparent 25%),
    linear-gradient(-45deg, #f1f5f9 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #f1f5f9 75%),
    linear-gradient(-45deg, transparent 75%, #f1f5f9 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.sealcut-preview-box img {
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  display: block;
}

.sealcut-placeholder {
  margin: 0;
  color: #64748b;
}

@media (max-width: 900px) {
  .sealcut-layout {
    grid-template-columns: 1fr;
  }

  .sealcut-header-inner {
    flex-direction: column;
  }
}