:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --border: #e2e5e9;
  --text: #1f2933;
  --text-muted: #667080;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 1px 2px rgba(16, 24, 40, 0.04);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.view {
  width: 100%;
}

/* Loading state */
.loading {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 48px 0;
}

/* Header */
.app-header {
  margin-bottom: 24px;
}

.app-title {
  font-size: 1.6rem;
  font-weight: 650;
  margin: 0;
  letter-spacing: -0.01em;
}

/* Cards */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

/* User card */
.user-card p {
  margin: 0 0 6px;
}

.user-card p:last-child {
  margin-bottom: 0;
}

.user-name {
  font-weight: 600;
  font-size: 1.05rem;
}

.user-email {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.user-location {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Wizard */
.wizard-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.wizard-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
}

.step-indicator {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 550;
  white-space: nowrap;
}

.step-text {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0 0 18px;
}

/* Error banner */
.error-banner {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #b91c1c;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

/* Form fields */
.field {
  margin-bottom: 18px;
}

.field-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.file-input,
.text-input {
  font: inherit;
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
}

.file-input {
  padding: 8px 10px;
}

.text-input:focus,
.file-input:focus,
.map-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* File issues */
.issues {
  margin: 4px 0 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.issue {
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.88rem;
  border: 1px solid transparent;
}

.issue-error {
  background: #fef2f2;
  border-color: #fca5a5;
  color: #b91c1c;
}

.issue-warning {
  background: #fffbeb;
  border-color: #fcd34d;
  color: #b45309;
}

/* Mapping table */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 18px;
}

.map-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.map-table th {
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 10px 14px;
  background: #fafbfc;
  border-bottom: 1px solid var(--border);
}

.map-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.map-table tr:last-child td {
  border-bottom: none;
}

.col-cell {
  width: 50%;
}

.col-name {
  font-weight: 550;
  word-break: break-word;
}

.col-sample {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 2px;
  word-break: break-word;
}

.col-sample-empty {
  font-style: italic;
}

.map-select {
  font: inherit;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
}

/* Preview summary */
.summary {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 14px;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-label {
  color: var(--text-muted);
}

.summary-value {
  font-weight: 550;
  text-align: right;
  word-break: break-word;
}

.value-ok {
  color: #15803d;
}

.value-bad {
  color: #b91c1c;
}

/* Mappings list */
.block-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.mappings-block {
  margin-bottom: 20px;
}

.mappings-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mapping-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
}

.mapping-col {
  font-weight: 550;
}

.mapping-arrow {
  color: var(--text-muted);
}

.mapping-field {
  color: var(--text-muted);
}

.mapping-empty {
  color: var(--text-muted);
}

/* Invalid samples */
.invalid-block {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 20px;
}

.invalid-block summary {
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 550;
  color: #b45309;
}

.invalid-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.invalid-item {
  display: flex;
  gap: 10px;
  font-size: 0.85rem;
}

.invalid-row {
  font-weight: 600;
  white-space: nowrap;
}

.invalid-reasons {
  color: var(--text-muted);
}

/* Import note */
.import-note {
  margin-bottom: 20px;
}

.helper-text {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin: 8px 0 0;
}

/* Importing step */
.progress-block {
  margin: 8px 0 8px;
}

.import-progress {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 100%;
  height: 12px;
  border: none;
  border-radius: 6px;
  background: #eef1f5;
  overflow: hidden;
}

.import-progress::-webkit-progress-bar {
  background: #eef1f5;
  border-radius: 6px;
}

.import-progress::-webkit-progress-value {
  background: var(--accent);
  border-radius: 6px;
  transition: width 0.2s ease;
}

.import-progress::-moz-progress-bar {
  background: var(--accent);
  border-radius: 6px;
}

.progress-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 10px 0 0;
  text-align: center;
}

/* Results step */
.results-headline {
  font-size: 1.15rem;
  font-weight: 650;
  margin: 0 0 16px;
}

.results-success {
  color: #15803d;
}

.results-warning {
  color: #b45309;
}

.results-failed {
  color: #b91c1c;
}

.enrollment-block {
  margin-bottom: 20px;
}

.enrollment-line {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0;
}

.tags-block {
  margin-bottom: 20px;
}

/* Step actions */
.step-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Primary button */
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

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

.btn-disabled {
  cursor: default;
}

/* Actions */
.actions {
  display: flex;
  justify-content: flex-end;
}

.btn {
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  border-radius: 8px;
  padding: 9px 18px;
  border: 1px solid transparent;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.btn-secondary {
  background: var(--card-bg);
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
  background: #f0f2f5;
  border-color: #d0d5dc;
}

/* Signed-out view */
.signed-out-card {
  text-align: center;
  padding: 40px 28px;
}

.signed-out-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.signed-out-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0 auto;
  max-width: 440px;
}

@media (max-width: 480px) {
  .container {
    padding: 28px 16px;
  }

  .app-title {
    font-size: 1.4rem;
  }
}