body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    color: #2c3e50;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

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

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

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: #2980b9;
}

.btn-logout {
    background: #e74c3c;
}

.btn-logout:hover {
    background: #c0392b;
}

.links {
    margin-top: 20px;
    font-size: 0.9em;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

#totalTile {
    background-color: #FFD1DC; /* Pastel Pink */
}

#testsTile {
    background-color: #FFB3BA; /* Light Pink */
}

#cd4Tile {
    background-color: #C6E2FF; /* Pastel Blue */
}

#vlTile {
    background-color: #B3E2CC; /* Mint Green */
}

#artTile {
    background-color: #FFEB99; /* Light Yellow */
}