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

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

body {
    overflow-x: hidden;
}

/* ─── Animations ─── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-up {
    animation: fadeUp 0.7s ease-out both;
}

@keyframes bounceSlow {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

.animate-bounce-slow {
    animation: bounceSlow 2.5s ease-in-out infinite;
}

/* ─── Scroll Reveal ─── */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.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; }

/* ─── Header ─── */
#site-header {
    transition: background-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

.nav-link::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #0d9488;
    transition: width 0.25s ease;
    margin-top: 2px;
}

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

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

#mobile-menu.closed {
    transform: translateX(100%);
}

#menu-btn[aria-expanded="true"] #bar1 {
    transform: translateY(3.5px) rotate(45deg);
}

#menu-btn[aria-expanded="true"] #bar2 {
    opacity: 0;
    transform: scaleX(0);
}

#menu-btn[aria-expanded="true"] #bar3 {
    transform: translateY(-3.5px) rotate(-45deg);
    width: 1.25rem;
}

/* ─── Service Cards ─── */
.service-card {
    transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.service-card:hover {
    transform: translateY(-4px);
}

/* ─── Testimonial Cards ─── */
.testimonial-card {
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.testimonial-card:hover {
    transform: translateY(-3px);
}

/* ─── Back to Top ─── */
#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#back-to-top:not(.visible) {
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
}

/* ─── Custom Select ─── */
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='%2394a3b8' stroke-width='2.5' 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;
}

select option {
    background: #1e293b;
    color: #e2e8f0;
}

/* ─── Input Focus Fix ─── */
input:focus, textarea:focus, select:focus {
    outline: none;
}

/* ─── Selection ─── */
::selection {
    background: rgba(13, 148, 136, 0.2);
    color: #0f766e;
}

/* ─── 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; }
    .animate-fade-up { animation: none; opacity: 1; }
    .animate-bounce-slow { animation: none; }
}

/* ─── Wide Screens ─── */
@media (min-width: 1920px) {
    .max-w-7xl { max-width: 80rem; }
}