:root {
  --bg: #FAF8F5;
  --surface: #F2EFE9;
  --surface-strong: #EAE5DC;
  --ink: #141413;
  --ink-muted: #575550;
  --border: rgba(20, 20, 19, 0.14);
  --accent: #C8431F;
  --accent-hover: #A83516;
  --pass: #1B6E44;
  --warn: #9E5808;
  --fail: #B42318;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  --sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  min-width: 320px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

.site-header {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.brand-group {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.brand-sub {
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.header-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-family: var(--mono);
  font-size: 0.8125rem;
}

.header-links a {
  color: var(--ink-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.header-links a:hover {
  color: var(--ink);
}

.workspace {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 24px;
}

.mode-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.mode-tab {
  min-height: 44px;
  padding: 10px 14px;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.mode-tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.panel[hidden] {
  display: none;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: end;
}

.form-grid-multi {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 14px;
  margin-bottom: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.field label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  max-width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.88rem;
}

.field textarea {
  min-height: 76px;
  resize: vertical;
}

.btn-primary,
.btn-secondary,
.preset-btn {
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #FFFFFF;
}

.btn-secondary,
.preset-btn {
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-secondary:hover,
.preset-btn:hover {
  background: var(--surface-strong);
  color: var(--ink);
}

.presets-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.presets-label {
  font-size: 0.8125rem;
  color: var(--ink-muted);
  margin-right: 4px;
}

.preset-btn {
  min-height: 44px;
  padding: 6px 12px;
  font-family: var(--mono);
  font-size: 0.8rem;
}

.status-line {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}

.results-area {
  margin-top: 20px;
  display: grid;
  gap: 18px;
}

.score-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.score-number {
  font-family: var(--mono);
  font-size: 2.15rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.score-band {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.band-excellent, .band-good {
  color: var(--pass);
  background: rgba(27, 110, 68, 0.08);
}

.band-foundation {
  color: var(--warn);
  background: rgba(158, 88, 8, 0.08);
}

.band-critical {
  color: var(--fail);
  background: rgba(180, 35, 24, 0.08);
}

.data-table-wrap {
  overflow-x: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

table.data-table th,
table.data-table td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

table.data-table th {
  font-weight: 600;
  background: var(--surface-strong);
  color: var(--ink);
}

.code-viewer {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
}

.code-viewer-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.file-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.file-tab {
  min-height: 44px;
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
}

.file-tab[aria-pressed="true"] {
  background: var(--ink);
  color: var(--bg);
}

pre.code-output {
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 420px;
  overflow-y: auto;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.split-checkout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.split-checkout > *,
.workspace > *,
.panel {
  min-width: 0;
  max-width: 100%;
}

.touch-list {
  display: grid;
  gap: 14px;
}

.touch-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  display: grid;
  gap: 10px;
}

.touch-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.reference-section {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: grid;
  gap: 16px;
}

.reference-section h2 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.reference-section p {
  max-width: 68ch;
  color: var(--ink-muted);
}

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

@media (max-width: 820px) {
  .split-checkout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 700px) {
  .form-grid,
  .form-grid-multi {
    grid-template-columns: minmax(0, 1fr);
  }
  .site-header,
  .workspace {
    padding: 16px;
  }
}

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