/* ===== Base & Reset ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== Scroll Reveal (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                    transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    .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; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
}

/* ===== Navbar scroll state ===== */
#navbar.scrolled {
    background: rgba(15, 24, 41, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

#navbar.scrolled .font-serif {
    color: #f0f3f9;
}

/* ===== Mobile menu transitions ===== */
#mobile-menu {
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s ease;
    opacity: 1;
}

#mobile-menu.collapsed {
    max-height: 0;
    opacity: 0;
}

/* ===== Menu card image hover ===== */
.menu-card img {
    will-change: transform;
}

/* ===== Focus styles ===== */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #63b88e;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== Selection ===== */
::selection {
    background: rgba(61, 150, 104, 0.3);
    color: #f0f3f9;
}

/* ===== Custom scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #0f1829;
}

::-webkit-scrollbar-thumb {
    background: #263a63;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #334d81;
}

/* ===== Mobile menu link hover ===== */
.mobile-link {
    position: relative;
}

.mobile-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #63b88e;
    transition: width 0.3s ease;
}

.mobile-link:hover::after {
    width: 100%;
}

/* ===== Subtle pattern overlay for sections ===== */
section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
}

#hero::before,
#about::before {
    display: none;
}

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

.floating {
    animation: float 4s ease-in-out infinite;
}