body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #e0f7fa, #b2ebf2, #80deea);
    background-size: 400% 400%;
    animation: backgroundAnimation 15s infinite;
    color: #4f6367;
}

@keyframes backgroundAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    padding: 2rem 1rem;
    text-align: center;
    color: #00796b;
    font-size: 2rem;
    font-weight: bold;
    text-transform: uppercase;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0 0;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

nav a {
    text-decoration: none;
    color: #00796b;
    font-size: 1rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

nav a:hover {
    color: #004d40;
    text-shadow: 0 0 8px #80cbc4, 0 0 15px #004d40;
}

section {
    padding: 2.5rem 1.5rem;
    margin: 1.5rem auto;
    max-width: 1100px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #004d40;
    font-size: 1.8rem;
    letter-spacing: 1px;
    border-bottom: 2px solid rgba(0, 0, 0, 0.1);
    display: inline-block;
    padding-bottom: 0.5rem;
}

.bookmark-grid, .gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, #80cbc4, #26a69a);
    color: #ffffff;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 255, 200, 0.4);
    background: linear-gradient(135deg, #26a69a, #004d40);
}

footer {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: #004d40;
    font-size: 0.9rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
    margin-top: 2rem;
}