/* Site geneli standart üst bar: sabit lacivert başlık, marka, ana menü, mobil düğme.
   404 gibi standart dışı kalan sayfalar için tek kaynak. */
body.menu-open {
    overflow: hidden;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 78px;
    display: flex;
    align-items: center;
    z-index: 1000;
    background: rgba(7,17,31,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.header-inner {
    width: min(100% - 40px, 1320px);
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.brand-name {
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 4px;
    line-height: 1;
}

.brand-title {
    margin-top: 5px;
    color: rgba(255,255,255,.55);
    font-size: 8px;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 28px);
}

.main-nav a {
    color: rgba(255,255,255,.82);
    text-decoration: none;
    font-size: 11px;
    letter-spacing: .7px;
    text-transform: uppercase;
    white-space: nowrap;
}

.main-nav a:hover {
    color: #fff;
}

.header-contact {
    border: 1px solid rgba(201,164,92,.55);
    color: var(--gold-light, #e3c98b) !important;
    border-radius: 30px;
    padding: 10px 16px;
}

.header-contact:hover {
    background: #c9a45c;
    color: #07111f !important;
}

.menu-button {
    display: none;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 50%;
    background: rgba(255,255,255,.05);
    cursor: pointer;
    flex-shrink: 0;
}

.menu-button span {
    display: block;
    width: 18px;
    height: 1px;
    background: #fff;
    margin: 4px auto;
    transition: .3s ease;
}

.menu-button.active span:first-child {
    transform: translateY(5px) rotate(45deg);
}

.menu-button.active span:nth-child(2) {
    opacity: 0;
}

.menu-button.active span:last-child {
    transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 760px) {
    .menu-button {
        display: block;
    }

    .main-nav {
        position: fixed;
        inset: 0;
        height: 100svh;
        background: rgba(7,17,31,.98);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 26px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-15px);
        transition: .35s ease;
    }

    .main-nav.open {
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .main-nav a {
        font-size: 15px;
        letter-spacing: 2px;
    }
}