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

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

body {
    overflow-x: hidden;
}

/* NAV */
#nav {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

#nav.scrolled {
    background: rgba(253, 252, 248, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(27, 67, 50, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2d8a2d;
    transition: width 0.25s ease;
}

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

/* MOBILE MENU */
#mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.mobile-link {
    position: relative;
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(27, 67, 50, 0.08);
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-link:hover {
    color: #2d8a2d;
    padding-left: 8px;
}

/* HERO FLOATING CARDS */
.card-float-1 {
    animation: float1 3.5s ease-in-out infinite;
}

.card-float-2 {
    animation: float2 4s ease-in-out infinite;
}

.card-float-3 {
    animation: float3 3.8s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

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

@keyframes float3 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* SERVICE CARDS */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #1B4332, #2d8a2d);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

/* SCROLL REVEAL */
.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; }

/* BACK TO TOP */
#back-to-top {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#back-to-top.visible {
    opacity: 1;
    pointer-events: all;
}

#back-to-top:hover {
    transform: translateY(-3px);
}

/* FORM */
input:focus, select:focus, textarea:focus {
    box-shadow: 0 0 0 3px rgba(45, 138, 45, 0.15);
}

/* UTILITY */
::selection {
    background: #1B4332;
    color: #FDFCF8;
}