/* Base & Utilities */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

/* Writing mode for vertical text */
.writing-mode-vertical {
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

/* Scroll reveal animations — progressive enhancement, only when JS runs and motion is preferred */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    .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; }
}

/* Service item hover */
.service-item {
    transition: background-color 0.3s ease;
}
.service-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

/* Navbar scroll state */
#site-header.scrolled {
    background-color: rgba(250, 250, 246, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(4, 120, 87, 0.1);
}

/* Mobile menu */
#mobile-menu.open {
    transform: translateX(0);
}

/* Menu lines animation */
.menu-line {
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle.active .menu-line:first-child {
    transform: rotate(45deg) translate(4px, 4px);
}
.menu-toggle.active .menu-line:last-child {
    transform: rotate(-45deg) translate(4px, -4px);
    opacity: 0;
}

/* Mobile link hover */
.mobile-link {
    transition: color 0.3s ease;
}
.mobile-link:hover {
    color: #047857;
}

/* Custom 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='%23047857' 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;
}

/* Selection color */
::selection {
    background-color: #047857;
    color: #fff;
}

/* Smooth image loading */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}