/* ── Reset & Base ─────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    overflow-x: hidden;
}

img {
    display: block;
    max-width: 100%;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ── Navigation ───────────────────────────────────── */
#navbar {
    transition: background-color 0.5s ease, box-shadow 0.5s ease, padding 0.5s ease;
}

#navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.97);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(12px);
}

#navbar.scrolled .nav-logo-text {
    color: #0f766e !important;
}

#navbar.scrolled .nav-link {
    color: rgba(30, 41, 59, 0.7) !important;
}

#navbar.scrolled .nav-link:hover {
    color: #0f766e !important;
}

#navbar.scrolled .cta-secondary {
    border-color: rgba(15, 118, 110, 0.3);
    color: #0f766e !important;
}

#navbar.scrolled .cta-secondary:hover {
    background-color: rgba(15, 118, 110, 0.05);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 0.3s ease;
}

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

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

#mobile-menu.open .mobile-menu-link {
    animation: fadeDown 0.4s ease forwards;
    opacity: 0;
}

#mobile-menu.open .mobile-menu-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-menu-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-menu-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-menu-link:nth-child(4) { animation-delay: 0.2s; }
#mobile-menu.open .mobile-menu-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.mobile-menu-line {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

#mobile-menu-btn.active .mobile-menu-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

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

/* ── Hero ─────────────────────────────────────────── */
.hero-eyebrow {
    animation: fadeUp 0.8s ease 0.3s forwards;
    opacity: 0;
    transform: translateY(16px);
}

.hero-headline {
    animation: fadeUp 0.8s ease 0.5s forwards;
    opacity: 0;
    transform: translateY(16px);
}

.hero-subtext {
    animation: fadeUp 0.8s ease 0.7s forwards;
    opacity: 0;
    transform: translateY(16px);
}

.hero-ctas {
    animation: fadeUp 0.8s ease 0.9s forwards;
    opacity: 0;
    transform: translateY(16px);
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Scroll Reveal ────────────────────────────────── */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ── Section Eyebrow ──────────────────────────────── */
.section-eyebrow {
    margin-bottom: 1rem;
}

/* ── Buttons ──────────────────────────────────────── */
.cta-primary {
    box-shadow: 0 4px 20px rgba(13, 148, 136, 0.3);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.cta-primary:hover {
    box-shadow: 0 8px 30px rgba(13, 148, 136, 0.4);
    transform: translateY(-2px);
}

.cta-secondary {
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.cta-secondary:hover {
    transform: translateY(-2px);
}

/* ── Scroll Indicator ─────────────────────────────── */
.scroll-indicator {
    animation: float 2.5s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ── Service Cards ────────────────────────────────── */
.service-card {
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

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

/* ── Area Items ───────────────────────────────────── */
.area-item {
    transition: padding-left 0.3s ease;
}

.area-item:hover {
    padding-left: 8px;
}

/* ── Form ─────────────────────────────────────────── */
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #14b8a6 !important;
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

/* ── Selection ────────────────────────────────────── */
::selection {
    background-color: rgba(13, 148, 136, 0.15);
    color: #0f766e;
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 767px) {
    .font-serif {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
    }

    #about, #services, #areas, #testimonials, #contact {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
}