:root {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #172033;
  background: #f5f7fb;
}

body {
  margin: 0;
  padding: 32px;
}

.page {
  max-width: 1120px;
  margin: 0 auto;
}

h1,
h2,
h3 {
  margin: 0 0 16px;
  line-height: 1.2;
}

h1 {
  font-size: 34px;
}

h2 {
  margin-top: 40px;
  font-size: 24px;
}

p {
  line-height: 1.6;
}

.card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
  margin: 20px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

input.demo-input {
  width: 100%;
  max-width: 320px;
  box-sizing: border-box;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  background: #fff;
}

input.demo-input[data-date-invalid="true"] {
  border-color: #ef4444;
  background: #fff7f7;
}

.hint {
  color: #64748b;
  font-size: 14px;
  margin-top: 8px;
}

.date-field-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.external-calendar-btn {
  width: 44px;
  height: 44px;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  font-size: 20px;
}

pre {
  overflow: auto;
  background: #0f172a;
  color: #e2e8f0;
  padding: 18px;
  border-radius: 14px;
  line-height: 1.5;
  font-size: 14px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.state-box {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: #f8fafc;
  color: #334155;
  font-size: 14px;
}

input.demo-input {
  width: 100%;
  max-width: 320px;
  box-sizing: border-box;
}