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

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(212, 154, 42, 0.25);
    color: #102135;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 1;
        transform: none;
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    /* Default visible state — no JS required */
    .reveal-up { opacity: 1; transform: translateY(0); }
    .reveal-left { opacity: 1; transform: translateX(0); }
    .reveal-right { opacity: 1; transform: translateX(0); }
}

/* JS-enhanced hidden states for below-the-fold sections */
.js-enabled .reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-enabled .reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-enabled .reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-enabled .reveal-up.revealed,
.js-enabled .reveal-left.revealed,
.js-enabled .reveal-right.revealed {
    opacity: 1;
    transform: translate(0);
}

/* ── Navbar transition ── */
#navbar.scrolled {
    background: rgba(10, 21, 34, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

#navbar.scrolled .menu-line {
    background: white;
}

/* ── Mobile menu animations ── */
#mobileMenu.open {
    opacity: 1;
    pointer-events: all;
}

#mobileMenu.closed {
    opacity: 0;
    pointer-events: none;
}

.mobile-link {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

#mobileMenu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobileMenu.closed .mobile-link {
    opacity: 0;
    transform: translateY(12px);
}

/* ── Menu button active state ── */
#menuBtn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

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

#menuBtn.active .menu-line:nth-child(3) {
    width: 20px;
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ── Form 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='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

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

::-webkit-scrollbar-track {
    background: #102135;
}

::-webkit-scrollbar-thumb {
    background: #3d6fa8;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #5b8cc2;
}

/* ── Service card stagger animation (JS-enhanced) ── */
@media (prefers-reduced-motion: no-preference) {
    .js-enabled .reveal-up {
        opacity: 0;
        transform: translateY(30px);
    }
}

/* ── Image loading placeholder ── */
img {
    background-color: #e8ecf4;
}

/* ── Focus visible for accessibility ── */
:focus-visible {
    outline: 2px solid #d49a2a;
    outline-offset: 2px;
}

/* ── Print styles ── */
@media print {
    #navbar, #mobileMenu, .reveal-up, .reveal-left, .reveal-right {
        display: none !important;
    }
    body {
        color: #000;
        background: #fff;
    }
}