/* Custom styles for Butternut Run */

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

/* Navbar scroll state */
nav.scrolled {
    background: rgba(10, 13, 18, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(75, 77, 85, 0.4);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Hero gradient animation */
@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Fade-in animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.stagger-children .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.stagger-children .animate-on-scroll:nth-child(2) { transition-delay: 100ms; }
{
    transition-delay: 200ms;
}
.stagger-children .animate-on-scroll:nth-child(4) { transition-delay: 300ms; }
.stagger-children .animate-on-scroll:nth-child(5) { transition-delay: 400ms; }
.stagger-children .animate-on-scroll:nth-child(6) { transition-delay: 500ms; }

/* Input autofill override */
input:-webkit-autofill,
textarea:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 30px #141820 inset !important;
    -webkit-text-fill-color: #f6f6f7 !important;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0a0d12;
}
::-webkit-scrollbar-thumb {
    background: #374151;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #4b4d55;
}

/* Mobile menu transition */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    opacity: 0;
}
#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}