/* ===== Base & Reset ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

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

body {
    overflow-x: hidden;
}

::selection {
    background: #047857;
    color: #ffffff;
}

/* ===== Navbar ===== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(253, 251, 247, 0);
    backdrop-filter: blur(0px);
    transition: background 0.4s ease, box-shadow 0.4s ease;
}

#navbar.nav-scrolled {
    background: rgba(253, 251, 247, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(4, 120, 87, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #047857;
    transition: all 0.25s ease;
    transform: translateX(-50%);
}

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

/* ===== Mobile Menu ===== */
#mobile-menu {
    max-height: 0;
}

#mobile-menu.open {
    max-height: 400px;
}

.mobile-nav-link {
    display: block;
}

/* ===== Hero Scroll Line Animation ===== */
@keyframes scroll-line {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.animate-scroll-line {
    animation: scroll-line 1.5s ease-in-out infinite;
}

/* ===== 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, #047857, #10b981);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

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

/* ===== Scroll Reveal (below-the-fold only, progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
        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; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
}

/* ===== Focus Styles ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #047857;
    outline-offset: 2px;
}

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

::-webkit-scrollbar-track {
    background: #fdfbf7;
}

::-webkit-scrollbar-thumb {
    background: #a7f3d0;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #34d399;
}