:root {
    --primary-blue: #1E40AF;
    --soft-gray: #f0f0f0;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --dark-text: #1a202c;
    --light-bg: #ffffff;
}

/* Custom styles */
.product-shadow {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 64px; /* Slightly larger icons */
    height: 64px;
    background: var(--soft-gray); /* Match the subtle background */
    color: var(--primary-blue); /* Primary blue for icons */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem; /* Larger icon size */
    margin: 0 auto 1rem;
    box-shadow: 0 5px 15px var(--shadow-light);
    transition: background 0.3s ease, color 0.3s ease;
}

.feature-icon i {
    color: var(--primary-blue);
}

.feature-icon:hover {
    background: var(--primary-blue);
    color: white;
}

.feature-icon:hover i {
    color: white;
}

/* Animations */
.pulse-animation {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

#sticky-buy-btn {
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#sticky-buy-btn.hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

@keyframes ping-once {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

.animate-ping-once {
    animation: ping-once 0.5s cubic-bezier(0, 0, 0.2, 1);
}