/* GLOBAL VARIABLES & RESET */
:root {
    --brand-teal: #00A699;
    --font-main: 'Nunito', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: var(--font-main); }
body { -webkit-font-smoothing: antialiased; background: #fff; overflow-x: hidden; padding-top: 80px; }

/* HEADER ARCHITECTURE (Bulletproof Flexbox) */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 80px;
    background: #FFFFFF;
    border-bottom: 1px solid #E5E7EB;
    z-index: 10000;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* LOGO */
.site-logo { display: flex; align-items: center; flex-shrink: 0; }
.site-logo img { height: 35px; width: auto; display: block; }

/* DESKTOP NAVIGATION */
.main-nav { display: none; }
@media (min-width: 1024px) {
    .main-nav { display: flex; align-items: center; }
}
.main-nav ul { display: flex; list-style: none; gap: 2.5rem; margin: 0; padding: 0; align-items: center; }
.main-nav a { color: #1F2A37; font-size: 14px; font-weight: 700; text-decoration: none; transition: 0.2s; }
.main-nav a:hover { color: var(--brand-teal); }

/* HEADER ACTIONS */
.header-actions { display: flex; align-items: center; gap: 1.5rem; flex-shrink: 0; }
.icon-link { display: flex; align-items: center; color: #4B5563; text-decoration: none; transition: 0.2s; }
.icon-link:hover { color: var(--brand-teal); }
.btn-primary {
    background: var(--brand-teal); color: #fff;
    padding: 10px 24px; border-radius: 8px;
    font-size: 14px; font-weight: 700; text-decoration: none;
    transition: 0.2s; display: inline-flex; align-items: center;
}
.btn-primary:hover { background: #008B80; }

/* MEGA MENU */
.has-mega-menu { position: relative; padding: 30px 0; }
.has-mega-menu:hover .mega-menu { display: grid; }
.mega-menu {
    position: absolute; top: 80px; left: 50%; transform: translateX(-50%);
    width: 90vw; max-width: 1000px;
    background: #fff; border-radius: 0 0 20px 20px;
    padding: 3rem; display: none; grid-template-columns: repeat(4, 1fr); gap: 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08); border: 1px solid #E5E7EB; border-top: none;
}
.mega-column h4 { color: #111827; margin-bottom: 1rem; font-size: 13px; text-transform: uppercase; font-weight: 800; }
.mega-column a { color: #4B5563; font-size: 15px; display: block; padding: 6px 0; font-weight: 600; }
.mega-column p { color: #6B7280; font-size: 14px; line-height: 1.5; font-weight: 600; }