@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

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

header {
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    padding: 20px 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

h1 {
    margin: 0;
    font-size: 2em;
    font-weight: 700;
    color: #333;
}

header span {
    font-size: 1em;
    color: #666;
}

nav {
    display: flex;
    justify-content: center;
    background-color: #fff;
    padding: 10px 0;
    border-bottom: 1px solid #ddd;
}

nav a {
    color: #333;
    text-decoration: none;
    margin: 0 15px;
    font-weight: 500;
    padding: 5px 10px;
    transition: background 0.3s ease;
}

nav a:hover {
    background: #ddd;
    border-radius: 5px;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.container-item {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.container-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.container-item h2 {
    font-size: 1.2em;
    margin: 15px;
    color: #333;
}

.container-item iframe,
.container-item img {
    width: 100%;
    height: auto;
    display: block;
}

footer {
    background-color: #fff;
    border-top: 1px solid #ddd;
    color: #666;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

footer p {
    margin: 5px 0;
    font-size: 0.9em;
}