/* ===== Base & Utilities ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

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

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

::selection {
    background: #99f6e4;
    color: #134e4a;
}

/* ===== Custom Button Styles ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #0d9488;
    color: #ffffff;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.875rem 1.75rem;
    border-radius: 0.75rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3), 0 1px 3px rgba(13, 148, 136, 0.2);
}

.btn-primary:hover {
    background: #0f766e;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 148, 136, 0.35), 0 2px 6px rgba(13, 148, 136, 0.25);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    color: #0f172a;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.875rem 1.75rem;
    border-radius: 0.75rem;
    text-decoration: none;
    border: 2px solid #e2e8f0;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover {
    border-color: #0d9488;
    color: #0d9488;
    transform: translateY(-2px);
}

/* ===== Navbar ===== */
.navbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #0d9488;
    border-radius: 1px;
    transition: width 0.25s ease;
}

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

/* ===== Mobile Menu ===== */
.mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-menu.active {
    display: block;
}

.mobile-nav-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f1f5f9;
}

.mobile-nav-link:last-child {
    border-bottom: none;
}

/* ===== Service Cards ===== */
.service-card {
    background: #ffffff;
    border: 1px solid #f1f5f9;
    border-radius: 1.25rem;
    padding: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover {
    border-color: #ccfbf1;
    box-shadow: 0 20px 40px rgba(13, 148, 136, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
    transform: translateY(-4px);
}

/* ===== Geometric Blobs ===== */
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
}

.blob-teal {
    background: #14b8a6;
}

.blob-slate {
    background: #475569;
}

/* ===== Scroll Reveal (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 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; }
    .reveal-delay-5 { transition-delay: 0.5s; }
}

/* ===== Select styling ===== */
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;
}

/* ===== Focus visible ===== */
:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
}

/* ===== Responsive tweaks ===== */
@media (max-width: 640px) {
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    #hero h1 {
        font-size: 2.75rem;
    }
}