body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    text-align: center;
    padding: 2rem auto 0;
    background-color: transparent;
    color: #222;
}

.library {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 1rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.gradient-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.gradient-box {
    width: 100%;
    height: 150px;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.3s;
}

.gradient-box:hover {
    transform: scale(1.05);
}

.gradient-box:active {
    transform: scale(0.95);
}

.alert-box {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #333;
    color: #fff;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 1000;
}

.alert-box.show {
    opacity: 1;
}

footer {
    background-color: transparent;
    color: #222;
    text-align: center;
    margin: 2em auto;
    width: 100%;
}

footer p {
    margin: 0;
    font-size: 0.9em;
}