:root {
    --nav-bg: rgba(255,255,255,0.86);
    --nav-border: #e5e7eb;
    --nav-text: #111827;
    --nav-muted: #6b7280;
}

.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--nav-border);
    z-index: 1000;
}

.nav-link {
    color: var(--nav-muted);
    font-weight: 600;
}
.nav-link:hover {
    color: var(--nav-text);
}

.btn-ghost {
    border: 1px solid var(--nav-border);
    background: transparent;
    border-radius: 10px;
}

.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.45);
    backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: 0.2s;
    z-index: 998;
}
.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}
.navbar-brand {
    display: flex;
    align-items: center;
    padding: 0;
}

.site-logo {
    height: 42px;
    width: auto;
    display: block;
}

@media (max-width: 768px) {
    .site-logo {
        height: 34px;
    }
}

@media (max-width: 991px) {
    .navbar-collapse {
        background: rgba(255,255,255,0.95);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--nav-border);
        padding: 16px;
    }
}

.navbar-toggler {
    border: none;
}
.navbar-toggler:focus {
    box-shadow: none;
}

body {
    padding-top: 72px;
}