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

.login-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
    margin: 1rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: #333;
    margin: 0 0 0.5rem 0;
    font-size: 2rem;
}

.login-header p {
    color: #666;
    margin: 0;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

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

.btn {
    width: 100%;
    padding: 0.75rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background: #5a6fd8;
}

.btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 0.75rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    border: 1px solid #fcc;
}

.success-message {
    background: #efe;
    color: #363;
    padding: 0.75rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    border: 1px solid #cfc;
}

.loading {
    display: none;
    text-align: center;
    margin-top: 1rem;
}

.demo-credentials {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.demo-credentials h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
    font-size: 1rem;
}

.demo-credentials p {
    margin: 0.25rem 0;
    color: #666;
}

.demo-credentials strong {
    color: #333;
}