.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    transition: .3s ease;
}
.site-header.scrolled {
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(18px);
    box-shadow: 0 10px 35px rgba(15,45,32,.08);
}
.header-inner {
    min-height: 96px;
    display: flex;
    align-items: center;
    gap: 32px;
}
.brand img { width: 165px; max-height: 70px; object-fit: contain; }
.main-nav { margin-left: auto; display: flex; gap: 28px; align-items: center; }
.main-nav a { font-size: .92rem; font-weight: 700; color: #334039; position: relative; }
.main-nav a::after {
    content: '';
    position: absolute;
    left: 0; right: 100%; bottom: -8px;
    height: 2px;
    background: var(--green-700);
    transition: .25s ease;
}
.main-nav a:hover::after, .main-nav a.active::after { right: 0; }
.btn {
    min-height: 50px;
    padding: 0 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    font-weight: 800;
    border: 1px solid transparent;
    transition: .25s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--green-900); color: var(--white); box-shadow: 0 16px 34px rgba(23,62,42,.22); }
.btn-ghost { border-color: var(--border); background: rgba(255,255,255,.65); }
.btn-header { background: var(--green-900); color: var(--white); min-height: 46px; }
.btn-light { background: var(--white); color: var(--green-950); }
.text-link { color: var(--green-800); font-weight: 800; }
.menu-toggle { display: none; background: none; border: 0; padding: 8px; }
.menu-toggle span { display: block; width: 26px; height: 2px; margin: 5px 0; background: var(--ink); }
.site-footer { padding: 80px 0 24px; background: var(--green-950); color: white; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 60px; }
.footer-grid h3 { font-size: 1rem; margin-bottom: 20px; }
.footer-grid a, .footer-grid p { display: block; color: rgba(255,255,255,.7); margin: 9px 0; font-size: .92rem; }
.footer-brand img { width: 200px; filter: brightness(0) invert(1); margin-bottom: 20px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 55px; padding-top: 22px; display: flex; justify-content: space-between; color: rgba(255,255,255,.55); font-size: .85rem; }
.floating-whatsapp {
    position: fixed; right: 22px; bottom: 22px; z-index: 90;
    background: #1f9d55; color: white; border-radius: 999px;
    padding: 14px 20px; font-weight: 800;
    box-shadow: 0 14px 35px rgba(0,0,0,.18);
}