/* ===== Base & Utilities ===== */
html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background-color: rgba(13, 148, 136, 0.2);
    color: #0f766e;
}

/* ===== Scroll Reveal (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .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);
    }

    .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 Card Hover ===== */
.service-card {
    will-change: transform;
}

@media (prefers-reduced-motion: no-preference) {
    .service-card {
        transform: translateY(0);
        transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.5s ease;
    }

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

/* ===== Navbar Scrolled State ===== */
#navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), 0 4px 20px rgba(0, 0, 0, 0.04);
}

#navbar.scrolled .font-serif {
    color: #0f172a !important;
}

#navbar.scrolled .text-slate-500 {
    color: #64748b !important;
}

/* ===== Mobile Menu ===== */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

/* ===== Smooth scrollbar ===== */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(13, 148, 136, 0.3) transparent;
}

*::-webkit-scrollbar {
    width: 6px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background-color: rgba(13, 148, 136, 0.3);
    border-radius: 3px;
}