body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container {
    max-width: 900px;
}

h1 {
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    font-weight: bold;
}

.card {
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: none;
    border-radius: 15px;
}

.btn {
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

#generateBtn {
    font-size: 1.1em;
    padding: 12px 24px;
}

.table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
}

.table td {
    vertical-align: middle;
}

.shortlink {
    font-family: monospace;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
}

.shortlink:hover {
    color: #0056b3;
    text-decoration: underline;
}

#welcomeUser {
    color: white;
    font-weight: 500;
}

#logoutSection {
    position: absolute;
    top: 20px;
    right: 20px;
}

@media (max-width: 768px) {
    #logoutSection {
        position: relative;
        top: 0;
        right: 0;
    }
    
    .container h1 {
        font-size: 1.8em;
    }
}