body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  margin: 20px;
}

.login-header {
  text-align: center;
  margin-bottom: 30px;
}

.login-header h2 {
  color: #333;
  margin-bottom: 5px;
  font-size: 28px;
}

.login-header p {
  color: #666;
  margin: 0;
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #333;
  font-size: 14px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  border: 2px solid #e1e8ed;
  border-radius: 8px;
  box-sizing: border-box;
  transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-button {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.login-button:active {
  transform: translateY(0);
}

.flash {
  margin-bottom: 20px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
}

.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.input-icon {
  position: relative;
}

.input-icon input {
  padding-left: 45px;
}

.input-icon::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background-size: contain;
  opacity: 0.6;
}

.username-icon::before {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23666"><path d="M12 12c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm0 2c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z"/></svg>');
}

.password-icon::before {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23666"><path d="M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zM9 6c0-1.66 1.34-3 3-3s3 1.34 3 3v2H9V6z"/></svg>');
}