/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; -webkit-font-smoothing: antialiased; }

/* ── Navigation ── */
.nav {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease;
}
.nav.scrolled {
    background: rgba(254, 253, 248, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(6, 78, 59, 0.08);
}
.nav-logo { transition: color 0.3s ease; }
.nav.scrolled .nav-logo { color: #064e3b; }

.nav-btn { display: none; }
@media (max-width: 767px) {
    .nav-btn { display: flex; }
    .nav.scrolled .line { background: #064e3b; }
}
.line1 { transform-origin: center; }
.line2 { transform-origin: center; }
.line3 { transform-origin: center; }
.nav-btn[aria-expanded="true"] .line1 { transform: translateY(9px) rotate(45deg); }
.nav-btn[aria-expanded="true"] .line2 { opacity: 0; }
.nav-btn[aria-expanded="true"] .line3 { transform: translateY(-6px) rotate(-45deg); width: 24px; }

#menu { transition: opacity 0.3s ease; }
#mobileMenu { transition: opacity 0.4s ease, pointer-events 0.4s ease; }
#mobileMenu.open { opacity: 1; pointer-events: auto; }
.mobile-link { transition: color 0.3s ease; }

.nav-link {
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #10b981;
    transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

/* ── Reveal Animations ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
}
/* Progressive enhancement: JS adds .revealed */
.reveal:not(.revealed) {
    opacity: 0;
    transform: translateY(24px);
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ── Form ── */
input:focus, textarea:focus {
    outline: none;
}

/* ── Selection ── */
::selection {
    background: #d1fae5;
    color: #064e3b;
}