.image-mask {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.feature-card {
    background: linear-gradient(135deg, #e6f7ff 0%, #cceeff 100%);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(1, 156, 220, 0.1);
    transition: all 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(1, 156, 220, 0.2);
}
.icon-box {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #019CDC;
    border-radius: 0.75rem;
    color: #019CDC;
    margin-right: 1.25rem;
    flex-shrink: 0;
    background-color: #e6f7ff;
    transition: all 0.3s ease;
}
.icon-box:hover {
    background-color: #019CDC;
    color: white;
}
.section-bg {
    background: linear-gradient(135deg, #017bb8 0%, #0077D1 100%);
}
.section-bg-reverse {
    background: linear-gradient(135deg, #0077D1 0%, #017bb8 100%);
}
.clip-path-polygon {
    clip-path: polygon(0 100%, 50% 0, 100% 100%);
}
.stats-card {
    transition: all 0.3s ease;
}
.stats-card:hover {
    transform: scale(1.05);
}
.challenge-card {
    transition: all 0.3s ease;
}
.challenge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(1, 156, 220, 0.1);
}

/* Navigation Menu Styles */
#navigation-menu {
    position: sticky;
    top: 0;
    z-index: 50;
}

/* Mobile menu overlay */
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

#overlay.visible {
    opacity: 1;
    visibility: visible;
}