*, *::before, *::after {
    box-sizing: border-box;
}

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

body {
    min-height: 100vh;
}

/* Scroll reveal — progressive enhancement, only when JS is enabled and user prefers motion */
.js-enabled.animate-enabled .scroll-reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.js-enabled.animate-enabled .scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Header scroll state */
#header.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(30, 58, 95, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: #ca8a04;
    border-radius: 1px;
    transition: all 0.25s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 60%;
}

/* Mobile menu */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu .mobile-menu-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.2s ease;
}

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

#mobile-menu.open .mobile-menu-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-menu-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-menu-link:nth-child(3) { transition-delay: 0.15s; }

/* Menu button active state */
#menu-btn[aria-expanded="true"] #menu-icon-open {
    transform: rotate(90deg);
}

#menu-btn[aria-expanded="true"] #menu-icon-open {
    opacity: 0;
}

#menu-btn[aria-expanded="true"] #menu-icon-close {
    opacity: 1;
    transform: rotate(0deg);
}

#menu-icon-close {
    transform: rotate(-90deg);
}

/* Back to top & phone FAB */
#back-to-top a,
#phone-fab a {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#back-to-top.visible a,
#phone-fab.visible a {
    opacity: 1;
    pointer-events: all;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .scroll-reveal {
        opacity: 1;
        transform: none;
    }
    #back-to-top a,
    #phone-fab a {
        transition: none;
    }
}

/* Focus visible */
:focus-visible {
    outline: 2px solid #ca8a04;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f0f4fa;
}
::-webkit-scrollbar-thumb {
    background: #1e3a5f;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #264582;
}