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

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

body {
    overflow-x: hidden;
}

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

/* Scroll Reveal — progressive enhancement, hidden by default */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    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; }

/* Scroll Line Animation */
.scroll-line {
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); }
}

/* Navbar */
.navbar-scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.navbar-scrolled .nav-link {
    color: #64748b;
}

.navbar-scrolled .nav-link:hover {
    color: #0d9488;
}

.navbar-scrolled .font-serif {
    color: #1e293b;
}

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

.mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

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

.mobile-menu-open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu-open .mobile-link:nth-child(2) { transition-delay: 0.2s; }
.mobile-menu-open .mobile-link:nth-child(3) { transition-delay: 0.3s; }
.mobile-menu-open .mobile-link:nth-child(4) { transition-delay: 0.4s; }

/* Menu Items */
.group:hover .border-dotted {
    border-color: #99f6e4;
}

/* Smooth anchor offset */
section[id], header[id], footer[id] {
    scroll-margin-top: 80px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .scroll-line {
        animation: none;
        opacity: 0.5;
    }
    
    img {
        transition: none;
    }
}