:root {
  --brand: #4338ca;
  --brand-dark: #372fa8;
  --text: #0f172a;
  --muted: #475569;
  --panel: #ffffff;
  --bg: #f1f5f9;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font: 16px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: 780px;
  margin: 24px auto 40px;
  padding: 16px;
}

h1 {
  font-size: 32px;
  margin: 0 0 8px;
  color: #1e3a8a;
}

h2 {
  font-size: 20px;
  margin: 0 0 10px;
  color: #111827;
}

h3 {
  margin: 12px 0 8px;
  font-size: 16px;
}

.muted {
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
  margin-top: 16px;
}

.field-group {
  margin-bottom: 12px;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
}

input,
select {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 14px;
}

input:focus,
select:focus {
  outline: 2px solid rgba(67, 56, 202, 0.35);
  outline-offset: 1px;
}

.hint {
  font-size: 12px;
  color: var(--muted);
}

.btn {
  margin-top: 12px;
  background: var(--brand);
  color: #ffffff;
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}

.btn:hover {
  background: var(--brand-dark);
}

.summary-row {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #eef2ff;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 14px;
}

.label {
  font-weight: 500;
}

.value {
  font-weight: 600;
}

.mono {
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.info-card ul {
  margin: 6px 0 0 18px;
  padding: 0;
  font-size: 14px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  margin-top: 6px;
}

.result-item {
  padding: 8px 10px;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  font-size: 14px;
}

.warning {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #fef2f2;
  border: 1px solid #fecaca;
}

.breakdown {
  margin-top: 14px;
  font-size: 14px;
}

.breakdown dl {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.2fr);
  gap: 6px 12px;
  margin: 0;
}

.breakdown dt {
  font-weight: 500;
}

.breakdown dd {
  margin: 0;
  text-align: right;
}

.help-list {
  padding-left: 20px;
  margin: 8px 0 0;
  font-size: 14px;
}

.help-list li + li {
  margin-top: 4px;
}

.errors {
  margin-top: 8px;
  font-size: 13px;
  color: #b91c1c;
}

.testlog {
  margin-top: 16px;
  font-size: 11px;
  background: #0f172a;
  color: #e5e7eb;
  padding: 8px 10px;
  border-radius: 10px;
  max-height: 160px;
  overflow: auto;
  white-space: pre-wrap;
}

.footer {
  margin-top: 12px;
  font-size: 12px;
}