:root {
  --bg-page: #f6f8fa;
  --bg-surface: #ffffff;
  --bg-muted: #f3f4f6;
  --bg-subtle: #fbfcfd;
  --border-default: #d0d7de;
  --border-strong: #b6c2cf;
  --text-primary: #1f2328;
  --text-secondary: #57606a;
  --text-muted: #6e7781;
  --accent: #0969da;
  --accent-soft: #ddf4ff;
  --danger-soft: #ffebe9;
  --danger-text: #cf222e;
  --warning-soft: #fff8c5;
  --warning-text: #9a6700;
  --success-soft: #dafbe1;
  --success-text: #1a7f37;
  --radius-sm: 4px;
  --radius-md: 6px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-family);
}

body {
  font-size: 14px;
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
input,
select,
textarea {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-primary);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 56px;
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--border-default);
  background: var(--bg-surface);
}

.topbar__brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.brand-link {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.topbar__subtitle {
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page {
  padding: var(--space-6);
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

.eyebrow {
  margin: 0 0 var(--space-1);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-header h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
}

.page-header__description {
  max-width: 60ch;
  margin: var(--space-2) 0 0;
  color: var(--text-secondary);
}

.summary-bar {
  display: grid;
  grid-template-columns: repeat(3, minmax(132px, 1fr));
  gap: var(--space-3);
  min-width: min(100%, 420px);
}

.summary-item {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
}

.summary-item strong {
  display: block;
  margin-top: var(--space-1);
  font-size: 20px;
  line-height: 1.2;
}

.summary-item__label {
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.toolbar {
  display: grid;
  grid-template-columns:
    minmax(220px, 2fr) minmax(160px, 1fr) minmax(180px, 1fr)
    auto;
  gap: var(--space-3);
  align-items: end;
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
}

.search-field,
.filter-field,
.form-row {
  display: grid;
  gap: 6px;
}

.search-field label,
.filter-field label,
.form-row label {
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.search-field input,
.filter-field select,
.form-row input,
.form-row select,
.form-row textarea,
.primary-button,
.secondary-button,
.danger-button {
  min-height: 36px;
  padding: 0 10px;
}

.form-row textarea {
  min-height: 120px;
  padding-top: 10px;
  padding-bottom: 10px;
  resize: vertical;
}

.checkbox-field {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-weight: 600;
}

.checkbox-field input {
  width: 16px;
  height: 16px;
  margin: 0;
}

.checkbox-field--form {
  margin-top: var(--space-1);
}

.status-panel {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
}

.status-panel[data-state="loading"] {
  background: var(--accent-soft);
  color: var(--accent);
}

.status-panel[data-state="success"] {
  background: var(--success-soft);
  color: var(--success-text);
}

.status-panel[data-state="error"] {
  background: var(--danger-soft);
  color: var(--danger-text);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(320px, 0.9fr);
  gap: var(--space-4);
  align-items: start;
  margin-top: var(--space-4);
}

.list-section,
.form-section {
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-default);
}

.section-header h2 {
  margin: 0;
  font-size: 16px;
}

.section-header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 12px;
}

.table-wrapper {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: var(--bg-subtle);
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-default);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

tbody tr:hover {
  background: #fafbfc;
}

tbody tr[data-purchased="true"] {
  color: var(--text-secondary);
  background: #fcfcfd;
}

.item-name {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
}

.item-meta {
  display: block;
  margin-top: 2px;
  color: var(--text-muted);
  font-size: 12px;
}

.price-cell,
.date-cell {
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.memo-cell {
  min-width: 180px;
  color: var(--text-secondary);
}

.link-cell a {
  word-break: break-all;
}

.priority-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.priority-badge[data-priority="high"] {
  background: var(--danger-soft);
  color: var(--danger-text);
}

.priority-badge[data-priority="medium"] {
  background: var(--warning-soft);
  color: var(--warning-text);
}

.priority-badge[data-priority="low"] {
  background: var(--bg-muted);
  color: var(--text-secondary);
  border-color: var(--border-default);
}

.status-text {
  display: inline-block;
  min-width: 56px;
  color: var(--text-secondary);
  font-size: 12px;
}

.purchased-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  white-space: nowrap;
}

.actions-cell {
  white-space: nowrap;
}

.inline-actions {
  display: inline-flex;
  gap: var(--space-2);
}

.primary-button,
.secondary-button,
.danger-button {
  cursor: pointer;
}

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

.secondary-button:hover,
.primary-button:hover,
.danger-button:hover {
  filter: brightness(0.98);
}

.danger-button {
  border-color: var(--danger-text);
  background: var(--danger-text);
  color: #ffffff;
}

.item-form {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
}

.form-actions {
  display: flex;
  gap: var(--space-2);
}

.form-error {
  margin: 0;
  color: var(--danger-text);
}

.empty-state {
  padding: var(--space-6);
  text-align: center;
}

.empty-state h3 {
  margin: 0 0 var(--space-2);
  font-size: 16px;
}

.empty-state p {
  margin: 0;
  color: var(--text-secondary);
}

dialog {
  width: min(92vw, 420px);
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

dialog::backdrop {
  background: rgba(31, 35, 40, 0.35);
}

.dialog-content {
  padding: var(--space-5);
}

.dialog-content h2 {
  margin: 0 0 var(--space-2);
  font-size: 18px;
}

.dialog-content p {
  margin: 0 0 var(--space-5);
  color: var(--text-secondary);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

.mobile-label {
  display: none;
}

@media (max-width: 980px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .summary-bar {
    min-width: 0;
  }
}

@media (max-width: 760px) {
  .topbar,
  .page {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .topbar {
    flex-wrap: wrap;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .page-header {
    flex-direction: column;
  }

  .summary-bar,
  .toolbar {
    grid-template-columns: 1fr;
  }

  table,
  thead,
  tbody,
  tr,
  td {
    display: block;
    width: 100%;
  }

  thead {
    display: none;
  }

  tbody tr {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-default);
  }

  td {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    gap: var(--space-3);
    padding: 8px var(--space-4);
    border-bottom: 0;
  }

  .mobile-label {
    display: inline-block;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 700;
  }

  .actions-cell {
    padding-top: var(--space-2);
  }

  .inline-actions {
    flex-wrap: wrap;
  }

  .form-actions,
  .dialog-actions {
    flex-direction: column;
  }
}