body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1E90FF, #8A2BE2);
    color: white;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(30, 144, 255, 0.9);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 24px;
    margin: 0;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

nav ul li {
    margin-left: 20px;
    cursor: pointer;
    padding: 10px 15px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

nav ul li:hover {
    background-color: #FF6347;
}

nav ul li.active {
    background-color: #8A2BE2;
}

main {
    flex: 1;
    padding: 80px 20px 20px;
    overflow-x: hidden;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background: white;
    color: #333;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    position: relative;
}

.card:hover {
    transform: translateY(-5px);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.card h3 {
    margin-top: 15px;
    font-size: 18px;
}

.card p {
    font-size: 14px;
    color: #666;
}

.card button {
    background-color: #FF6347;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    transition: background-color 0.3s ease;
}

.card button:hover {
    background-color: #8A2BE2;
}

footer {
    background: rgba(30, 144, 255, 0.9);
    padding: 20px;
    text-align: center;
    color: white;
    font-size: 14px;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }

    nav ul {
        flex-direction: column;
        width: 100%;
    }

    nav ul li {
        margin-left: 0;
        margin-top: 10px;
        width: 100%;
        text-align: center;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }
}