/**
 * nav.css
 * Navbar, mobile menu, hamburger toggle
 */

.nav {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: calc(100% - 48px);
    max-width: 1200px;
    background: rgba(12,17,24,0.7);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 60px;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
    background: rgba(12,17,24,0.9);
    box-shadow: 0 8px 32px rgba(0,0,0,0.5), 0 1px 0 rgba(26,255,213,0.05);
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.02em;
    cursor: pointer;
}
.nav-logo svg { width: 38px; height: 38px; }
.nav-logo img.logo-icon { width: 44px; height: 44px; object-fit: contain; }
.nav-logo img.logo-wordmark { height: 28px; width: auto; object-fit: contain; }
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted);
    transition: color var(--transition);
    cursor: pointer;
    position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 1.5px;
    background: var(--teal);
    transition: width 0.3s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}
.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--teal);
    color: var(--ink);
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 40px;
    transition: box-shadow var(--transition), transform var(--transition);
    cursor: pointer;
    white-space: nowrap;
}
.nav-cta:hover {
    box-shadow: 0 0 12px rgba(26,255,213,0.15);
    transform: translateY(-1px);
}
.nav-cta svg { width: 16px; height: 16px; }

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* Mobile menu overlay */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(6,8,10,0.96);
    backdrop-filter: blur(24px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
    font-family: 'Syne', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    cursor: pointer;
}
.mobile-menu-close {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}