/* Base & Utilities */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(74, 222, 128, 0.3);
    color: #fff;
}

/* Scroll Reveal - Progressive Enhancement */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    
    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Floating Card Animations */
@media (prefers-reduced-motion: no-preference) {
    .float-card-1 {
        animation: float1 4s ease-in-out infinite;
    }
    
    .float-card-2 {
        animation: float2 5s ease-in-out infinite;
        animation-delay: 1s;
    }
}

@keyframes float1 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes float2 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(8px); }
}

/* Navbar Glass Effect */
.nav-scrolled {
    background: rgba(4, 10, 20, 0.85) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-scrolled .nav-link {
    color: rgba(255, 255, 255, 0.7);
}

/* Smooth Focus Styles */
input:focus,
select:focus,
textarea:focus {
    outline: none;
}

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

::-webkit-scrollbar-track {
    background: #040a14;
}

::-webkit-scrollbar-thumb {
    background: rgba(74, 222, 128, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(74, 222, 128, 0.4);
}

/* Mobile Menu Transitions */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

#mobile-menu.hidden {
    animation: slideUp 0.2s ease forwards;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-10px); pointer-events: none; }
}

/* Mobile Link Hover */
.mobile-link {
    position: relative;
}

.mobile-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #4ade80;
    transition: width 0.3s ease;
}

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

/* Image Hover Zoom */
.group:hover img {
    transform: scale(1.05);
}

/* Button Ripple Effect */
button, a {
    -webkit-tap-highlight-color: transparent;
}

/* Selection highlight for form */
input::placeholder,
textarea::placeholder {
    color: rgba(255, 255, 255, 0.15);
}