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

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

body {
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== NAVBAR ========== */
#navbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(94, 234, 212, 0.15);
    box-shadow: 0 1px 20px rgba(13, 27, 42, 0.06);
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px rgba(13, 27, 42, 0.1);
}

.nav-link {
    position: relative;
}

/* ========== MOBILE MENU ========== */
#mobile-menu {
    animation: slideDown 0.25s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.mobile-link {
    display: block;
}

/* ========== SCROLL REVEAL ========== */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Default state: visible (progressive enhancement) */
.reveal {
    will-change: opacity, transform;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(28px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== BUTTON HOVER GLOW ========== */
button:hover, a:hover {
    transform: translateY(-1px);
}

button:active, a:active {
    transform: translateY(0);
}

/* ========== SELECTION ========== */
::selection {
    background: #5EEAD4;
    color: #0D1B2A;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #F0FFF8;
}
::-webkit-scrollbar-thumb {
    background: #7EDDB8;
    border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #3AD8B8;
}