/* Base Reset & Custom Properties */
:root {
    --color-midnight-900: #020c1b;
    --color-midnight-800: #0a192f;
    --color-mint-400: #64ffda;
    --color-mint-300: #a8ffec;
    --color-mint-100: #e0fbf4;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-midnight-900);
    color: var(--color-mint-100);
    font-family: 'Montserrat', sans-serif;
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
}

/* Selection Color */
::selection {
    background-color: var(--color-mint-400);
    color: var(--color-midnight-900);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-midnight-900);
}

::-webkit-scrollbar-thumb {
    background: var(--color-mint-400/30);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-mint-400);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
}

/* Reveal on Scroll */
.reveal-on-scroll {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.reveal-on-scroll:not(.revealed) {
    opacity: 0;
    transform: translateY(40px);
}

/* Navbar */
#navbar {
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
}

#navbar.scrolled {
    background-color: rgba(2, 12, 27, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding-top: 1rem;
    padding-bottom: 1rem;
}

/* Mobile Menu */
#mobile-menu {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

#mobile-menu.open {
    display: flex;
}

#mobile-menu.hidden {
    display: none;
}

/* Link Underline Animation */
a {
    text-decoration: none;
}

/* Image Loading */
img {
    max-width: 100%;
    height: auto;
}

/* Focus Styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-mint-400);
    outline-offset: 4px;
    border-radius: 2px;
}

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

/* Responsive Adjustments */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .font-serif {
        line-height: 1.2;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    html {
        font-size: 16px;
    }
}

@media (min-width: 1025px) {
    html {
        font-size: 17px;
    }
}