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

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

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

@keyframes spin-slow {
    from { transform: rotate(45deg); }
    to { transform: rotate(405deg); }
}

@keyframes pulse-slow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

.animate-float-delay {
    animation: float 5s ease-in-out 0.5s infinite;
}

.animate-spin-slow {
    animation: spin-slow 20s linear infinite;
}

.animate-pulse-slow {
    animation: pulse-slow 4s ease-in-out infinite;
}

/* Scroll-triggered animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    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; }

/* Navbar scroll state */
.nav-scrolled {
    background: rgba(3, 11, 28, 0.95) !important;
    backdrop-filter: blur(20px) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3) !important;
}

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

/* Hamburger animation */
.menu-active #bar1 {
    transform: translateY(4px) rotate(45deg);
}

.menu-active #bar2 {
    opacity: 0;
}

.menu-active #bar3 {
    transform: translateY(-4px) rotate(-45deg);
}

/* Smooth scroll offset for fixed nav */
section[id] {
    scroll-margin-top: 80px;
}

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

::-webkit-scrollbar-track {
    background: #030B1C;
}

::-webkit-scrollbar-thumb {
    background: #0E2A5C;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #123570;
}

/* Selection color */
::selection {
    background: rgba(52, 211, 153, 0.3);
    color: #D1FAE5;
}

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

/* Image aspect ratio helper */
img {
    max-width: 100%;
    height: auto;
}