:root {
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --text-color: #333;
    --background-light: #f5f5f5;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background-light);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text-color);
}

.login-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    margin: 1rem;
}

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

.header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.header p {
    color: #666;
    line-height: 1.5;
    margin: 0;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
}

button {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background: var(--primary-dark);
}

.footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: #666;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.checkbox-group label {
    display: inline;
    margin: 0;
}

.error-message {
    background-color: #ffebee;
    color: #d32f2f;
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-align: center;
}