body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    color: #1f2937;
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 20px;
}

header {
    text-align: center;
    padding: 48px 20px;
}

header h1 {
    font-size: 42px;
    margin-bottom: 12px;
}

.button {
    display: inline-block;
    margin-top: 16px;
    padding: 12px 24px;
    background: #2563eb;
    color: white;
    text-decoration: none;
    border-radius: 6px;
}

section {
    margin: 48px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

th,
td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    background: #f9fafb;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.activity-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

.activity-card img {
    display: block;
    width: 100%;
    height: auto;
}

.activity-details {
    padding: 16px;
}

footer {
    margin-top: 48px;
    text-align: center;
    color: #6b7280;
}

@media (max-width: 800px) {
    .activity-grid {
        grid-template-columns: 1fr;
    }
}

.activity-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.activity-card {
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.activity-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.activity-card-link:hover {
    text-decoration: none;
}

.activity-card-link:hover img {
    opacity: 0.92;
}

.hive-username {
    color: #6b7280;
    font-size: 0.9rem;
}