/* === Base & Reset === */
*, *::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;
}

::selection {
    background-color: #FF6B4A;
    color: white;
}

/* === Scrollbar === */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #1C1C1C;
}
::-webkit-scrollbar-thumb {
    background: #4A4A4A;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #FF6B4A;
}

/* === Scroll Indicator Animation === */
@keyframes scrollIndicator {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.animate-scroll-indicator {
    animation: scrollIndicator 1.5s ease-in-out infinite;
}

/* === Scroll Reveal === */
.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.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    html {
        scroll-behavior: auto;
    }
    .animate-scroll-indicator {
        animation: none;
    }
}

/* === Nav Active State === */
.nav-link.active {
    color: #FF6B4A;
}

/* === Mobile Menu Transitions === */
.mobile-nav-link {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

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

/* === Hamburger Animation === */
#menu-toggle[aria-expanded="true"] #hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
#menu-toggle[aria-expanded="true"] #hamburger span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
#menu-toggle[aria-expanded="true"] #hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 100%;
}

/* === Image reveal for about section === */
.reveal-img {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* === Focus Styles === */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid #FF6B4A;
    outline-offset: 2px;
}

/* === Smooth section transitions === */
section {
    position: relative;
}

/* === Gallery hover overlay transition === */
.group .absolute {
    transition: opacity 0.4s ease;
}