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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  max-width: 420px;
  width: 100%;
}

h1 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

p {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

input[type="text"] {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
  margin-bottom: 1rem;
}

input[type="text"]:focus {
  outline: none;
  border-color: #4a90d9;
  box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.2);
}

button {
  width: 100%;
  padding: 0.7rem;
  background: #4a90d9;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: #357abd;
}

.error {
  background: #fee;
  color: #c33;
  padding: 0.7rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  border: 1px solid #fcc;
}