/* ── Base & Utilities ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }

/* ── Scroll Reveal ── */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delays for service cards */
.scroll-reveal:nth-child(1) { transition-delay: 0.05s; }
.scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
.scroll-reveal:nth-child(3) { transition-delay: 0.15s; }
.scroll-reveal:nth-child(4) { transition-delay: 0.2s; }
.scroll-reveal:nth-child(5) { transition-delay: 0.25s; }
.scroll-reveal:nth-child(6) { transition-delay: 0.3s; }

/* ── Hero Animations ── */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.fade-in-up {
    opacity: 0;
    transform: translateY(24px);
    animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.fade-in-up-delay {
    opacity: 0;
    transform: translateY(24px);
    animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}
.fade-in-up-delay-2 {
    opacity: 0;
    transform: translateY(24px);
    animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Header Scroll State ── */
#header.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), 0 4px 20px rgba(0, 0, 0, 0.04);
}

/* ── 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='%2394a3b8' 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;
}

/* ── Mobile Menu Transition ── */
#mobile-menu {
    animation: slideDown 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Selection Color ── */
::selection {
    background: rgba(13, 148, 136, 0.15);
    color: #134e4a;
}