/* 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;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* Selection */
::selection {
    background: #4ade80;
    color: #0f172a;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #f8fafc;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Reveal Animations - Progressive Enhancement */
.reveal {
    opacity: 1;
    transform: none;
    transition: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    /* Stagger children */
    .reveal-stagger > * {
        opacity: 0;
        transform: translateY(16px);
        transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0.05s; }
    .reveal-stagger.revealed > *:nth-child(2) { transition-delay: 0.1s; }
    .reveal-stagger.revealed > *:nth-child(3) { transition-delay: 0.15s; }
    .reveal-stagger.revealed > *:nth-child(4) { transition-delay: 0.2s; }
    .reveal-stagger.revealed > *:nth-child(5) { transition-delay: 0.25s; }
    .reveal-stagger.revealed > *:nth-child(6) { transition-delay: 0.3s; }
    .reveal-stagger.revealed > *:nth-child(7) { transition-delay: 0.35s; }
    .reveal-stagger.revealed > *:nth-child(8) { transition-delay: 0.4s; }
}

/* Navbar */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(254, 253, 248, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.nav-brand {
    transition: color 0.3s ease;
}

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

#mobile-menu:not(.open) {
    opacity: 0;
    pointer-events: none;
}

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

/* Menu Toggle */
.menu-line-1 {
    transform-origin: center;
}
.menu-line-2 {
    transform-origin: center;
}

.menu-open .menu-line-1 {
    transform: translateY(5px) rotate(45deg);
}
.menu-open .menu-line-2 {
    transform: translateY(-5px) rotate(-45deg);
}

/* Hover underline animation for nav links */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #14b8a6;
    transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Form focus styles */
input:focus, textarea:focus {
    outline: none;
}

/* Smooth image loading */
img {
    image-rendering: auto;
}

/* Subtle page transition */
@media (prefers-reduced-motion: no-preference) {
    body {
        animation: fadeInPage 0.5s ease forwards;
    }
}

@keyframes fadeInPage {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Print styles */
@media print {
    #navbar, #mobile-menu, .reveal {
        display: block !important;
        opacity: 1 !important;
        transform: none !important;
    }
    body {
        color: #0f172a;
        background: white;
    }
}