/* ===========================
   HEADER — CUBE‑16
   =========================== */

.cube16-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 40px;
    background: linear-gradient(135deg, #0f1115, #1a1d22);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 0 25px rgba(0, 140, 255, 0.25);
    position: sticky;
    top: 0;
    z-index: 999;
}

/* LOGO */
.logo-area {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo {
    height: 48px;
    filter: drop-shadow(0 0 8px rgba(0,140,255,0.6));
}

.brand {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: #e6f1ff;
    text-shadow: 0 0 8px rgba(0,140,255,0.7);
}

/* NAVIGATION */
.nav-links {
    display: flex;
    gap: 26px;
}

.nav-links a {
    color: #c9d4e2;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    transition: 0.25s;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, #008cff, #9b4dff);
    transition: width 0.3s;
    border-radius: 2px;
}

.nav-links a:hover {
    color: #ffffff;
}

.nav-links a:hover::after {
    width: 100%;
}

/* LANG SWITCH */
.lang-switch {
    display: flex;
    gap: 10px;
}

.lang-btn {
    background: #14171c;
    border: 1px solid rgba(255,255,255,0.15);
    padding: 6px 14px;
    border-radius: 6px;
    color: #c9d4e2;
    cursor: pointer;
    font-size: 0.85rem;
    transition: 0.25s;
}

.lang-btn.active,
.lang-btn:hover {
    background: linear-gradient(135deg, #008cff, #9b4dff);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 0 12px rgba(0,140,255,0.6);
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
}