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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    overflow-x: hidden;
}

/* Scroll reveal base — progressive enhancement, JS adds .revealed */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .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; }
}

/* Scroll-reveal enhancement — hidden by default, shown by JS */
@media (prefers-reduced-motion: no-preference) {
    .reveal-hidden {
        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);
    }
    .reveal-hidden.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-hidden.delay-1 { transition-delay: 0.1s; }
    .reveal-hidden.delay-2 { transition-delay: 0.2s; }
    .reveal-hidden.delay-3 { transition-delay: 0.3s; }
    .reveal-hidden.delay-4 { transition-delay: 0.4s; }
}

/* Nav transition states */
nav.scrolled {
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(15, 26, 46, 0.06);
}

nav.scrolled .nav-link {
    color: #0f1a2e;
}

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

#mobileMenu.open .mobile-link {
    animation: fadeUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

#mobileMenu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobileMenu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile menu button active state */
#menuBtn.active .nav-line-1 {
    transform: rotate(45deg) translate(3px, 3px);
}

#menuBtn.active .nav-line-2 {
    transform: rotate(-45deg) translate(2px, -2px);
}

/* Prevent body scroll when mobile menu is open */
body.menu-open {
    overflow: hidden;
}

/* Selection color */
::selection {
    background: rgba(201, 152, 58, 0.2);
    color: #0f1a2e;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #fafaf8;
}

::-webkit-scrollbar-thumb {
    background: rgba(15, 26, 46, 0.15);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(15, 26, 46, 0.3);
}

/* Image loading placeholder */
img {
    background-color: #e8e6e1;
}