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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-box {
  background: white;
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #1a202c;
  text-align: center;
  margin-bottom: 0.5rem;
}

.subtitle {
  text-align: center;
  color: #718096;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.error-message {
  background-color: #fee;
  border: 1px solid #fcc;
  color: #c33;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.form-section {
  width: 100%;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: #2d3748;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  color: #718096;
  font-size: 0.85rem;
}

.btn {
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  margin-bottom: 1rem;
}

.btn-primary {
  background-color: #667eea;
  color: white;
}

.btn-primary:hover {
  background-color: #5568d3;
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-google {
  background-color: white;
  color: #3c4043;
  border: 1px solid #dadce0;
}

.btn-google:hover {
  background-color: #f8f9fa;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.divider {
  text-align: center;
  margin: 1.5rem 0;
  position: relative;
}

.divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: #e2e8f0;
}

.divider span {
  background: white;
  padding: 0 1rem;
  color: #718096;
  font-size: 0.9rem;
  position: relative;
}

.register-link {
  text-align: center;
  color: #718096;
  font-size: 0.9rem;
  margin-top: 1rem;
}

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

.register-link a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .login-box {
    padding: 2rem 1.5rem;
  }
  
  h1 {
    font-size: 1.75rem;
  }
}