/* Davidson Hall — Custom Styles */

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f5f0e8;
}
::-webkit-scrollbar-thumb {
    background: #b8ccba;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #8fb393;
}

/* Navbar transition */
#navbar.scrolled {
    background: rgba(250, 248, 244, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(26, 77, 46, 0.08);
}

/* Mobile menu animations */
.mobile-link {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

#mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }

/* Hamburger animation */
#menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
#menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
#menu-btn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 5px;
}

/* Floating card animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

.floating-card-1 {
    animation: float 4s ease-in-out infinite;
}
.floating-card-2 {
    animation: float 5s ease-in-out infinite 0.5s;
}
.floating-card-3 {
    animation: float 4.5s ease-in-out infinite 1s;
}

/* Scroll reveal (progressive enhancement) */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* Form success state */
#form-message.success {
    color: #3d6345;
}
#form-message.error {
    color: #b91c1c;
}

/* Selection color */
::selection {
    background: #d9e4da;
    color: #1a4d2e;
}