:root {
  color-scheme: light;
  --page: #f4f6f7;
  --surface: #ffffff;
  --surface-subtle: #eef1f2;
  --text: #1b1f21;
  --muted: #586166;
  --border: #cfd5d8;
  --border-strong: #9da7ac;
  --accent: #147a43;
  --accent-strong: #0f6034;
  --accent-soft: #e3f3e9;
  --link: #1559a6;
  --warning: #9a4d00;
  --warning-soft: #fff1dd;
  --danger: #b42318;
  --danger-soft: #ffebe9;
  --focus: #2359c4;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "Roboto Mono", monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 6px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--page);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--page);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

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

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  color: #ffffff;
  background: var(--text);
  border-radius: var(--radius);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.app-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  width: min(100% - 32px, 1280px);
  min-height: 56px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #ffffff;
  background: var(--text);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 14px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.repo-link,
.language-button {
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.repo-link:hover,
.language-button:hover {
  border-color: var(--border-strong);
  background: var(--surface-subtle);
}

.workspace {
  width: min(100% - 32px, 1280px);
  margin: 0 auto;
  padding: 28px 0 40px;
}

.workspace-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 4px;
  font-size: 2.25rem;
  line-height: 1.15;
}

h2 {
  margin-bottom: 0;
  font-size: 1rem;
  line-height: 1.3;
}

h3 {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.workspace-subtitle {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
}

.dialect-badge,
.privacy-label {
  flex: 0 0 auto;
  border: 1px solid #9bc8aa;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
}

.dialect-badge {
  padding: 5px 10px;
}

.privacy-label {
  padding: 3px 8px;
}

.control-bar {
  min-height: 60px;
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) 120px;
  align-items: end;
  gap: 16px;
  padding: 10px 0 18px;
  border-bottom: 1px solid var(--border);
}

.mode-tabs {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(96px, 1fr));
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-subtle);
}

.mode-tab {
  min-height: 40px;
  padding: 7px 14px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.mode-tab.is-active {
  background: var(--surface);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--border);
}

.compact-control,
.field-control,
.expression-control {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.compact-control input,
.compact-control select,
.field-control select,
.expression-control input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}

.compact-control input,
.compact-control select,
.field-control select {
  padding: 8px 10px;
}

.compact-control-count select {
  font-family: var(--mono);
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  min-height: 570px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.editor-column,
.schedule-column {
  min-width: 0;
  padding: 24px;
}

.editor-column {
  border-right: 1px solid var(--border);
}

.section-heading-row {
  min-height: 30px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.schedule-heading-row p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.field-control:last-child {
  grid-column: 1 / -1;
}

.field-control select {
  font-family: var(--mono);
  font-size: 0.85rem;
}

.expression-control input {
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 1rem;
}

.expression-control input[aria-invalid="true"] {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.syntax-line {
  margin: 8px 0 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 0.75rem;
}

.preset-section,
.expression-output,
.description-list {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.preset-list {
  min-height: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preset-button {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.78rem;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.preset-button:hover,
.preset-button[aria-pressed="true"] {
  border-color: #81b996;
  background: var(--accent-soft);
}

.expression-output-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.copy-button {
  min-height: 36px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
}

.copy-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.copy-button:disabled {
  border-color: var(--border);
  color: var(--muted);
  cursor: not-allowed;
  opacity: 0.65;
}

#current-expression {
  display: block;
  min-height: 52px;
  padding: 13px 14px;
  overflow-wrap: anywhere;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: #f9faf9;
  color: var(--text);
  font-family: var(--mono);
  font-size: 1rem;
}

.status-message,
.schedule-status {
  color: var(--muted);
  font-size: 0.82rem;
}

.status-message {
  min-height: 24px;
  margin: 8px 0 0;
}

.status-message.is-valid,
.schedule-status.is-ready {
  color: var(--accent-strong);
}

.status-message.is-error,
.schedule-status.is-error {
  color: var(--danger);
}

.description-list dl {
  margin: 0;
}

.description-list dl > div {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 0;
  border-top: 1px solid var(--surface-subtle);
}

.description-list dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.description-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.schedule-status {
  min-width: 110px;
  margin: 0;
  text-align: right;
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  min-width: 620px;
  table-layout: fixed;
  border-collapse: collapse;
}

th,
td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-subtle);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

th:first-child,
td:first-child {
  width: 44px;
  text-align: right;
}

th:nth-child(2),
td:nth-child(2) {
  width: 38%;
}

th:nth-child(3),
td:nth-child(3) {
  width: 34%;
}

td {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover td {
  background: #f7faf8;
}

.relative-cell {
  color: var(--accent-strong);
  font-family: var(--sans);
  font-weight: 700;
}

td.empty-schedule {
  width: auto;
  padding: 28px 16px;
  color: var(--muted);
  font-family: var(--sans);
  text-align: center;
}

.app-footer {
  width: min(100% - 32px, 1280px);
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 0.8rem;
}

.toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  max-width: min(360px, calc(100vw - 32px));
  padding: 10px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--text);
  color: #ffffff;
  font-size: 0.85rem;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1280px) {
  .control-bar {
    grid-template-columns: auto minmax(220px, 1fr) 110px;
  }

  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .editor-column {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 720px) {
  .workspace,
  .header-inner,
  .app-footer {
    width: min(100% - 24px, 1280px);
  }

  .workspace {
    padding-top: 20px;
  }

  .workspace-heading {
    align-items: center;
  }

  .workspace-subtitle {
    display: none;
  }

  .control-bar {
    grid-template-columns: 1fr 110px;
  }

  .mode-tabs {
    grid-column: 1 / -1;
  }

  .editor-column,
  .schedule-column {
    padding: 20px 16px;
  }
}

@media (max-width: 420px) {
  .header-inner {
    min-height: 52px;
  }

  .repo-link {
    display: none;
  }

  .footer-separator {
    display: none;
  }

  h1 {
    font-size: 1.6rem;
  }

  .dialect-badge {
    font-size: 0.7rem;
  }

  .control-bar {
    grid-template-columns: 1fr;
  }

  .field-grid {
    grid-template-columns: 1fr 1fr;
  }

  .description-list dl > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

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