body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif;
  margin: 2rem auto;
  max-width: 720px;
  padding: 0 1.25rem;
  background: #fff;
  color: #222;
}

main {
  display: grid;
  gap: 1.25rem;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.branding {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

h1 {
  margin: 0;
  font-size: 1.55rem;
}

.tagline {
  font-size: 0.92rem;
  color: #555;
}

.card {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1.25rem 1.35rem;
  background: #fff;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

label {
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #333;
}

input {
  padding: 0.6rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
  background: #fafafa;
  color: #222;
  transition: border-color 0.15s ease, background 0.15s ease;
}

input:focus {
  outline: none;
  border-color: #0b5ed7;
  background: #fff;
}

button {
  padding: 0.62rem 0.9rem;
  border: 1px solid #0a53be;
  border-radius: 6px;
  font-size: 0.96rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  background: #0b5ed7;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: #0949ab;
}

.message {
  min-height: 1.15rem;
  font-size: 0.95rem;
  color: #d6336c;
}

footer {
  margin-top: 0.5rem;
  color: #666;
  font-size: 0.88rem;
  text-align: right;
}