* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft Yahei", "PingFang SC", sans-serif;
  background: #f3f6fb;
  color: #1f2937;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 20px 28px;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #2563eb 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.header-title {
  font-size: 22px;
  font-weight: 600;
}

.header-subtitle {
  font-size: 13px;
  opacity: 0.8;
}

.header-meta {
  display: flex;
  gap: 12px;
}

.meta-card {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 10px 14px;
  border-radius: 10px;
  min-width: 120px;
}

.meta-label {
  font-size: 12px;
  opacity: 0.7;
}

.meta-value {
  font-size: 14px;
  font-weight: 600;
  margin-top: 4px;
}

.nav {
  display: flex;
  gap: 12px;
  padding: 14px 28px;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.nav-item {
  border: none;
  background: #f1f5f9;
  padding: 8px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
}

.nav-item.active {
  background: #2563eb;
  color: #fff;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.main {
  padding: 28px;
}

.tab {
  display: none;
}

.tab.active {
  display: block;
}

.section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid #eef2f7;
}

.card-title {
  font-weight: 600;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input,
.textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  font-size: 14px;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input:focus,
.textarea:focus,
select:focus {
  outline: none;
  border-color: #93c5fd;
  box-shadow: 0 0 0 3px rgba(147, 197, 253, 0.4);
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

.form-actions {
  display: flex;
  gap: 12px;
}

.button {
  border: none;
  background: #2563eb;
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.2);
}

.button.loading {
  opacity: 0.7;
  pointer-events: none;
}

.button.loading::after {
  content: "";
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-left: 8px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-top-color: #ffffff;
  animation: spin 0.8s linear infinite;
}

.button.secondary {
  background: #e5e7eb;
  color: #1f2937;
}

.button.ghost {
  background: transparent;
  color: #2563eb;
  border: 1px dashed #93c5fd;
}

.table-wrap {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.table th,
.table td {
  padding: 10px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
}

.timeline {
  display: grid;
  gap: 8px;
}

.timeline-item {
  padding: 10px 12px;
  background: #f8fafc;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
}

.upload-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.upload-label {
  font-size: 13px;
  color: #6b7280;
}

.result-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.result-title {
  font-weight: 500;
}

.status {
  font-size: 13px;
  color: #2563eb;
  background: #eff6ff;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #bfdbfe;
}

.file-compare {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 160px;
  overflow-y: auto;
  padding: 8px;
  border-radius: 12px;
  border: 1px dashed #e2e8f0;
  background: #f8fafc;
}

.file-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px dashed #e2e8f0;
}

.file-group-title {
  font-size: 12px;
  font-weight: 600;
  color: #1e3a8a;
}

.file-group-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  background: #ffffff;
  font-size: 12px;
}

.file-item button,
.file-item a {
  border: none;
  background: transparent;
  color: #2563eb;
  cursor: pointer;
  font-size: 12px;
  text-decoration: none;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 1000;
}

.modal.open {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
}

.modal-content {
  position: relative;
  width: min(1200px, 92vw);
  max-height: 90vh;
  background: #ffffff;
  border-radius: 16px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.2);
  z-index: 1;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
}

.modal-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}

.modal-preview {
  width: 100%;
  min-height: 60vh;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #f8fafc;
}

.modal-result {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
}

.modal-subtitle {
  font-size: 13px;
  font-weight: 600;
  color: #475569;
}

.modal-result .textarea {
  height: 100%;
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1f2937;
  color: #ffffff;
  padding: 10px 16px;
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 1100;
}

.toast.show {
  opacity: 1;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 900px) {
  .modal-content {
    width: 96vw;
    padding: 16px;
  }
  .modal-body {
    grid-template-columns: 1fr;
  }
  .modal-preview {
    min-height: 45vh;
  }
}

.stepper {
  display: flex;
  gap: 8px;
  padding: 6px 0 12px;
}

.step {
  flex: 1;
  text-align: center;
  padding: 6px 8px;
  border-radius: 999px;
  background: #f1f5f9;
  font-size: 12px;
  color: #64748b;
}

.step.active {
  background: #dbeafe;
  color: #1d4ed8;
  font-weight: 600;
}

.step.done {
  background: #dcfce7;
  color: #166534;
  font-weight: 600;
}