:root {
  color-scheme: light;
  --primary: #1a4d8f;
  --secondary: #f0f4fb;
  --text: #1f2933;
  --accent: #0f766e;
  --danger: #b91c1c;
  --radius: 12px;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--secondary);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--primary);
}

a:hover,
a:focus {
  color: var(--accent);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: #fff;
  color: var(--primary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.app-header,
.app-footer,
.page-header {
  background: #fff;
  padding: 1.5rem 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.app-header h1 {
  margin: 0 0 0.25rem;
  font-size: 2rem;
}

.tagline {
  margin: 0;
  color: #4b5563;
}

.app-footer ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0.5rem;
  display: flex;
  gap: 1rem;
}

.app-footer {
  text-align: center;
  font-size: 0.875rem;
}

main#app-root {
  display: block;
  padding: 2rem 1rem 4rem;
  max-width: 960px;
  margin: 0 auto;
}

.tabbed-importer {
  display: block;
}

.tab-list {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  align-items: flex-end;
}

.tab-button {
  padding: 0.75rem 1.25rem;
  border: 1px solid #d1d5db;
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  font-weight: 600;
  cursor: default;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.tab-button[aria-selected="true"] {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 10px rgba(26, 77, 143, 0.18);
}

.tab-button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.tab-panel {
  display: block;
}

/* Honor the hidden attribute so only the active tab's panel is visible. */
.tab-panel[hidden] {
  display: none;
}

.page-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.upload-area {
  background: #fff;
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
  margin-bottom: 1.5rem;
}

.upload-area label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

input[type="file"] {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: var(--radius);
  cursor: pointer;
}

.upload-tips {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: #4b5563;
}

.summary-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.summary-card {
  background: #fff;
  padding: 1rem;
  border-radius: var(--radius);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
}

.summary-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.summary-card strong {
  font-size: 1.25rem;
}

.table-wrapper {
  overflow-x: auto;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.12);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  padding: 0.75rem;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
}

th {
  background: var(--secondary);
  font-weight: 600;
}

.table-sort-button {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font: inherit;
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
  cursor: pointer;
}

.table-sort-button:hover {
  text-decoration: underline;
}

.table-sort-button:focus-visible {
  text-decoration: underline;
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

tbody tr:hover {
  background: rgba(26, 77, 143, 0.04);
}

.status-note {
  background: #fff7ed;
  border-left: 4px solid #f97316;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.success-message {
  color: var(--accent);
  font-weight: 600;
}

.error-message {
  color: var(--danger);
  font-weight: 600;
}

button.primary-button {
  padding: 0.75rem 1.25rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
}

button.primary-button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
}

button.primary-button:hover,
button.primary-button:focus-visible {
  background: var(--accent);
}

button.clear-button {
  margin-top: 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}

button.clear-button:hover,
button.clear-button:focus {
  background: var(--accent);
}

.vendor-table-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.vendor-table-controls {
  display: flex;
  justify-content: flex-end;
}

.vendor-edit-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid #cbd5e1;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.vendor-edit-toggle:hover,
.vendor-edit-toggle:focus-visible,
.vendor-edit-toggle--active {
  border-color: var(--primary);
  color: var(--primary);
}

.vendor-edit-toggle--active {
  background: rgba(26, 77, 143, 0.12);
}

.vendor-table {
  width: 100%;
}

.vendor-table--editing td {
  background: rgba(15, 118, 110, 0.06);
}

.vendor-table-input {
  width: 100%;
  padding: 0.35rem 0.5rem;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  font: inherit;
}

.vendor-table-input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}

.offline-copy-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.offline-copy {
  background: #fff;
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 1rem;
}

.offline-copy__description {
  margin: 0;
  color: #4b5563;
}

.offline-copy__checklist {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.5rem;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}