* {
  box-sizing: border-box;
}

:root {
  --bg: #f8fafc;
  --page-bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --text-secondary: #475569;
  --muted: #64748b;
  --accent: #0d9488;
  --accent-dark: #0f766e;
  --accent-light: #ccfbf1;
  --accent-glow: rgba(13, 148, 136, 0.12);
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --success: #059669;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;
  --info: #0369a1;
  --info-bg: #f0f9ff;
  --info-border: #bae6fd;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 0.5rem;
  --radius: 0.625rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --transition: 0.15s ease;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--page-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

.page {
  max-width: 44rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vh, 3rem) clamp(1rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Hero */
.hero {
  text-align: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: 1rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-dark);
  background: var(--accent-light);
  letter-spacing: 0.02em;
  font-size: 0.75rem;
  font-weight: 600;
}

.hero-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--text);
}

.hero p {
  max-width: 28rem;
  margin: 0.75rem auto 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Stepper */
.stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0 0.5rem;
}

.stepper-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex: 1;
  max-width: 10rem;
}

.stepper-dot {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
  transition: all var(--transition);
  border: 2px solid var(--border-strong);
  background: var(--card);
  color: var(--muted);
}

.stepper-item.active .stepper-dot {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.stepper-item.completed .stepper-dot {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.stepper-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--transition);
}

.stepper-item.active .stepper-label {
  color: var(--text);
  font-weight: 600;
}

.stepper-item.completed .stepper-label {
  color: var(--accent-dark);
}

.stepper-line {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 0.5rem;
  min-width: 1rem;
  transition: background var(--transition);
}

.stepper-line.completed {
  background: var(--accent);
}

/* Wizard */
.wizard {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Step cards */
.step {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition);
}

.step.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow), var(--shadow-md);
}

.step.completed {
  border-color: var(--border);
  opacity: 0.85;
}

.step.completed .step-body {
  display: none;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}

.step-header:hover {
  background: #f8fafc;
}

.step.active .step-header {
  cursor: default;
}

.step-number {
  width: 1.75rem;
  height: 1.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--page-bg);
  border: 2px solid var(--border-strong);
  color: var(--muted);
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
  transition: all var(--transition);
}

.step.active .step-number {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.step.completed .step-number {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.step-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  flex: 1;
  color: var(--text);
}

.step-status {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
}

.step.completed .step-status {
  color: var(--accent-dark);
}

.step-toggle {
  display: none;
  align-items: center;
  gap: 0.25rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  color: var(--accent);
  cursor: pointer;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-left: auto;
}

.step-toggle:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}

.step.completed .step-toggle {
  display: inline-flex;
}

.step.active .step-toggle {
  display: none;
}

.step-body {
  padding: 0 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Drop zone */
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.875rem;
  min-height: 10rem;
  padding: 1.75rem;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--page-bg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-1px);
}

.drop-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--accent);
  font-weight: 800;
  font-size: 1rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}

.drop-zone:hover .drop-icon {
  transform: scale(1.05);
}

.drop-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.drop-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

input[type="file"] {
  display: none;
}

/* Buttons */
.actions {
  display: flex;
  gap: 0.625rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 0.625rem 1.25rem;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  white-space: nowrap;
  line-height: 1.5;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none !important;
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  color: var(--text-secondary);
  background: var(--page-bg);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--border);
  border-color: var(--border-strong);
}

.btn-ghost {
  color: var(--accent-dark);
  background: var(--accent-light);
  border: 1px solid var(--accent);
}

.btn-ghost:hover:not(:disabled) {
  background: #99f6e4;
}

/* Status */
.status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  line-height: 1.5;
  border: 1px solid transparent;
}

.status-text {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.status.info {
  background: var(--info-bg);
  color: var(--info);
  border-color: var(--info-border);
}

.status.error {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger-border);
}

.status.success {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success-border);
}

.status.loading::before {
  content: "";
  width: 0.875rem;
  height: 0.875rem;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* Form controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}

.industry-toggle {
  display: inline-flex;
  gap: 0.5rem;
  width: fit-content;
  padding: 0.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
}

.industry-option {
  min-width: 5.5rem;
  min-height: 2.5rem;
  border: 0;
  border-radius: calc(var(--radius-sm) - 2px);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.industry-option:hover {
  color: var(--accent-dark);
  background: var(--accent-light);
}

.industry-option.active {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.form-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.template-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition);
}

.template-link:hover {
  text-decoration: underline;
}

.file-input-row {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
}

.template-btn {
  padding: 0.5rem 0.875rem;
  font-size: 0.8rem;
  align-self: stretch;
  display: inline-flex;
  align-items: center;
}

/* Custom Select (Searchable Dropdown) */
.custom-select {
  position: relative;
  width: 100%;
}

.custom-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  outline: none;
  min-height: 2.5rem;
}

.custom-select-trigger:hover {
  border-color: var(--accent);
}

.custom-select-trigger:focus,
.custom-select.open .custom-select-trigger {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.custom-select-trigger .placeholder {
  color: var(--muted);
}

.custom-select-trigger .arrow {
  width: 1rem;
  height: 1rem;
  color: var(--muted);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 0.5rem;
}

.custom-select.open .custom-select-trigger .arrow {
  transform: rotate(180deg);
}

.custom-select-dropdown {
  position: fixed;
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition), transform var(--transition);
  min-width: 16rem;
}

.custom-select.open .custom-select-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.custom-select-search {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.custom-select-search input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--page-bg);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
}

.custom-select-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.custom-select-search input::placeholder {
  color: var(--muted);
}

.custom-select-options {
  overflow-y: auto;
  max-height: 20rem;
  padding: 0.375rem;
}

.custom-select-options::-webkit-scrollbar {
  width: 6px;
}

.custom-select-options::-webkit-scrollbar-track {
  background: transparent;
}

.custom-select-options::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
}

.custom-select-options::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

.custom-select-option {
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  line-height: 1.5;
  min-height: 2.25rem;
}

.custom-select-option:hover {
  background: var(--accent-light);
}

.custom-select-option.selected {
  background: var(--accent-light);
  color: var(--accent-dark);
  font-weight: 600;
}

.custom-select-option .check {
  width: 1rem;
  height: 1rem;
  opacity: 0;
  flex-shrink: 0;
}

.custom-select-option.selected .check {
  opacity: 1;
}

.custom-select-empty {
  padding: 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

/* File input custom */
.file-input-wrapper {
  position: relative;
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file-input-trigger {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--page-bg);
  color: var(--muted);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
}

.file-input-trigger:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.file-input-trigger.has-file {
  border-style: solid;
  border-color: var(--accent);
  color: var(--accent-dark);
  background: var(--accent-light);
}

.form-group .hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

/* Download link */
.download-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.report-result {
  display: flex;
  align-items: stretch;
  gap: 0.75rem;
  padding-top: 0.25rem;
}

.report-result[hidden] {
  display: none;
}

.report-result .status {
  flex: 1;
}

.report-result .download-link {
  flex-shrink: 0;
}

.batch-panel {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--page-bg);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.batch-panel-header h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text);
}

.batch-panel-header p {
  margin: 0.25rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.batch-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.batch-empty {
  padding: 0.875rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  background: var(--card);
}

.batch-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
}

.batch-item-text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  min-width: 0;
}

.batch-item-text strong {
  font-size: 0.875rem;
  color: var(--text);
  word-break: break-all;
}

.batch-item-text span {
  font-size: 0.8rem;
  color: var(--muted);
  word-break: break-all;
}

.batch-remove {
  flex-shrink: 0;
  border: 1px solid var(--danger-border);
  border-radius: var(--radius-sm);
  background: var(--danger-bg);
  color: var(--danger);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  transition: all var(--transition);
}

.batch-remove:hover {
  background: #fee2e2;
}

/* Alias panel */
.alias-panel {
  margin-top: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--page-bg);
}

.alias-panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--text);
}

.alias-panel .hint {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.alias-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.alias-form input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
}

.alias-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.alias-form input::placeholder {
  color: var(--muted);
}

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input:disabled {
  background: var(--muted-bg);
  color: var(--muted);
  cursor: not-allowed;
}

.form-input::placeholder {
  color: var(--muted);
}

.alias-form button {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.alias-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.alias-table th,
.alias-table td {
  padding: 0.5rem 0.625rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.alias-table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.alias-table td {
  color: var(--text);
}

.alias-table .delete-btn {
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
  cursor: pointer;
  transition: all var(--transition);
}

.alias-table .delete-btn:hover {
  background: #fee2e2;
}

.alias-table .empty-row {
  color: var(--muted);
  text-align: center;
  padding: 1.25rem;
}

/* Responsive */
@media (max-width: 640px) {
  .page {
    padding: 1.25rem 0.875rem;
    gap: 1.5rem;
  }

  .stepper-label {
    display: none;
  }

  .stepper-line {
    min-width: 0.5rem;
  }

  .step-header {
    padding: 0.875rem 1rem;
  }

  .step-body {
    padding: 0 1rem 1rem;
  }

  .drop-zone {
    min-height: 8rem;
    padding: 1.25rem 1rem;
  }

  .actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }
}