:root {
  color-scheme: light;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background-color: #f4f6f8;
  color: #1b1d1f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.page {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.hero {
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: 2.2rem;
}

p {
  margin: 0;
}

.card {
  background: #ffffff;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(22, 32, 45, 0.08);
  margin-bottom: 16px;
}

.label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.field {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #c7cdd4;
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 16px;
}

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

.primary {
  background: #1f4b99;
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}

.primary:disabled {
  opacity: 0.7;
  cursor: wait;
}

.hint {
  font-size: 0.9rem;
  color: #56606b;
}

.error {
  border-left: 4px solid #cc3344;
  color: #a11c2a;
}

.hidden {
  display: none;
}