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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 2rem;
}

.auth-card {
  background: white;
  border-radius: 16px;
  padding: 3rem;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.logo {
  font-size: 4rem;
  text-align: center;
  margin-bottom: 1rem;
}

h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2rem;
  text-align: center;
  color: #333;
}

.subtitle {
  margin: 0 0 2rem 0;
  text-align: center;
  color: #666;
  font-size: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #333;
  font-size: 0.95rem;
}

input {
  width: 100%;
  padding: 0.875rem;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s;
}

input:focus {
  outline: none;
  border-color: #667eea;
}

.help-text {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: #999;
}

.error-message {
  background: #fee;
  color: #c33;
  padding: 0.875rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  border: 1px solid #fcc;
}

.btn-primary {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.auth-footer {
  margin-top: 2rem;
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #e0e0e0;
}

.auth-footer p {
  color: #666;
  font-size: 0.95rem;
}

.auth-footer a {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
}

.auth-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .auth-card {
    padding: 2rem 1.5rem;
  }

  .logo {
    font-size: 3rem;
  }

  h1 {
    font-size: 1.5rem;
  }
}