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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(15, 181, 116, 0.3);
    color: #ffffff;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #040B16;
}

::-webkit-scrollbar-thumb {
    background: #1A3A5C;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0FB574;
}

/* Header scroll state */
header.scrolled {
    background: rgba(4, 11, 22, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
}

/* Nav links */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #0FB574;
    transition: width 0.3s ease;
}

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

.nav-link:hover {
    color: #ffffff !important;
}

/* Mobile menu */
#mobile-menu.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

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

.mobile-nav-link {
    position: relative;
}

.mobile-nav-link::after {
    content: '';
    display: block;
    width: 0;
    height: 1px;
    background: #0FB574;
    transition: width 0.3s ease;
    margin: 0 auto;
}

.mobile-nav-link:hover::after {
    width: 60%;
}

/* Hamburger animation */
.hamburger-line {
    transition: all 0.3s ease;
}

#mobile-menu-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

#mobile-menu-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

#mobile-menu-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* Service cards */
.service-card {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Testimonial cards */
.testimonial-card {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.testimonial-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

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

/* Reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.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; }

/* Floating animation for stat cards */
.float-slow {
    animation: float 4s ease-in-out infinite;
}

.float-medium {
    animation: float 3s ease-in-out infinite;
}

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

/* Select arrow */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23ffffff40' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    html {
        scroll-behavior: smooth;
    }

    .font-serif {
        line-height: 1.15;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}