#navbar {
            transition: background 0.5s ease, box-shadow 0.5s ease;
        }

        #navbar.nav-top {
            background: transparent;
        }

        #navbar.nav-scrolled {
            background: rgba(15, 15, 14, 0.92);
            backdrop-filter: blur(24px);
            box-shadow: 0 1px 0 rgba(184, 157, 111, 0.2);
        }

        .btn-dark {
            display: inline-block;
            background: var(--color-obsidian);
            color: var(--color-cream);
            padding: 1rem 2.5rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            font-size: 0.7rem;
            font-family: 'Jost', sans-serif;
            border: 1px solid transparent;
            transition: background 0.35s, border-color 0.35s, color 0.35s;
        }

        .btn-dark:hover {
            background: transparent;
            border-color: var(--color-obsidian);
            color: var(--color-obsidian);
        }

        .btn-gold {
            display: inline-block;
            background: transparent;
            color: var(--color-cream);
            padding: 1rem 2.5rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            font-size: 0.7rem;
            font-family: 'Jost', sans-serif;
            border: 1px solid var(--color-gold);
            transition: background 0.35s, color 0.35s;
        }

        .btn-gold:hover {
            background: var(--color-gold);
            color: var(--color-obsidian);
        }

        #scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold));
            z-index: 9999;
            width: 0%;
        }

        .activity-card {
            position: relative;
            overflow: hidden;
        }

        .activity-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 15, 14, 0.85) 0%, transparent 60%);
            transition: background 0.5s ease;
        }

        .activity-card:hover .overlay {
            background: linear-gradient(to top, rgba(15, 15, 14, 0.95) 0%, rgba(15, 15, 14, 0.2) 80%);
        }

        .activity-card img {
            transition: transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .activity-card:hover img {
            transform: scale(1.08);
        }

        .activity-card .info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 2rem;
            transition: transform 0.5s ease;
        }

        .activity-card .desc {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.4s ease 0.1s, transform 0.4s ease 0.1s;
            font-size: 0.85rem;
            margin-top: 0.5rem;
            line-height: 1.6;
            color: rgba(247, 244, 239, 0.8);
        }

        .activity-card:hover .desc {
            opacity: 1;
            transform: translateY(0);
        }