*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

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

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

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

.animate-slide-up {
    animation: slideUp 0.8s ease-out forwards;
    opacity: 0;
}

.animate-slide-up-delay {
    animation: slideUp 0.8s ease-out 0.2s forwards;
    opacity: 0;
}

.animate-slide-up-delay-2 {
    animation: slideUp 0.8s ease-out 0.4s forwards;
    opacity: 0;
}

/* Reveal on scroll */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out 0.15s, transform 0.8s ease-out 0.15s;
}

.reveal-delay.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-2 {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out 0.3s, transform 0.8s ease-out 0.3s;
}

.reveal-delay-2.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Navbar scroll state */
.navbar-scrolled {
    background: rgba(10, 26, 46, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(69, 168, 136, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

::-webkit-scrollbar-track {
    background: #0a1a2e;
}

::-webkit-scrollbar-thumb {
    background: #334e68;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #45a888;
}

/* Selection */
::selection {
    background: rgba(69, 168, 136, 0.3);
    color: #f0f4f8;
}

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

/* Smooth transitions for all interactive elements */
a, button {
    transition: all 0.3s ease;
}

/* Focus styles */
:focus-visible {
    outline: 2px solid #45a888;
    outline-offset: 2px;
}

/* Mobile menu transitions */
#mobile-menu {
    animation: slideDown 0.3s ease-out;
}

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