/* ============================================================
   246 Software — Header + mobil menü
   ============================================================ */

.site-header {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: var(--z-header);
    padding-block: var(--sp-3);
    transition: background-color var(--t-base), border-color var(--t-base);
    border-bottom: 1px solid transparent;
}

/* Sayfa kaydırılınca zemin kazanır — hero dışındaki bölümlerde okunur kalsın */
.site-header.is-scrolled {
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-6);
}


/* ---------- Logo ---------- */
.logo {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-4);
    flex-shrink: 0;
}

/* Basamaklı 246 işareti — rakam.svg. Koyu kutu CSS'te kalıyor ki
   logonun rengi ve köşe yarıçapı tek yerden yönetilebilsin. */
/* Basamaklı 246 işareti — rakam.svg. Kutu/zemin yok: görsel sadece
   rakamlardan oluşuyor, sayfanın siyahı üzerinde duruyor.
   Yükseklikten ölçekleniyor, genişlik oranına göre kendiliğinden geliyor. */
.logo__mark {
    display: block;
    height: 3.125rem;
    width: auto;
    flex-shrink: 0;
}

.logo__text {
    color: var(--c-white);
    font-size: 1rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    white-space: nowrap;
}


/* ---------- Masaüstü menü ---------- */
.nav {
    display: none;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: clamp(1.5rem, calc(var(--vw) * 2.08), 2.5rem);
}

.nav__link {
    color: var(--c-white);
    /* Tasarım değerinin 1.2 katı */
    font-size: clamp(0.9rem, calc(var(--vw) * 0.936), 1.125rem);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.09em;
    text-transform: uppercase;
    white-space: nowrap;
    transition: color var(--t-fast);
}

.nav__link:hover {
    color: var(--c-yellow);
}

.nav__cta {
    display: inline-flex;
    align-items: center;
    padding: clamp(0.9rem, calc(var(--vw) * 0.936), 1.125rem) clamp(1.5rem, calc(var(--vw) * 1.872), 2.25rem);
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-pill);
    color: var(--c-white);
    font-size: clamp(0.9rem, calc(var(--vw) * 0.936), 1.125rem);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.09em;
    line-height: 1;
    text-transform: uppercase;
    white-space: nowrap;
    transition: background-color var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.nav__cta:hover {
    background-color: var(--c-yellow);
    border-color: var(--c-yellow);
    color: var(--c-black);
}


/* ---------- Dil seçimi (TR / EN) ---------- */
/* Mobilde hamburgerin hemen solunda (sağa yaslı), masaüstünde menünün sağında */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-inline-start: auto;
    font-size: clamp(0.8125rem, calc(var(--vw) * 0.85), 1rem);
    font-weight: var(--fw-bold);
    letter-spacing: 0.08em;
    line-height: 1;
}

.lang-switch__item {
    padding: 0.375rem 0.125rem;
    color: var(--c-gray-500);
    transition: color var(--t-fast);
}

.lang-switch__item:hover {
    color: var(--c-white);
}

.lang-switch__item.is-active {
    color: var(--c-yellow);
}

.lang-switch__sep {
    color: var(--c-gray-700);
}


/* ---------- Hamburger ---------- */
.hamburger {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.3125rem;
    width: 1.75rem;
    padding: 0.375rem 0;
    flex-shrink: 0;
}

.hamburger__bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--c-white);
    border-radius: 2px;
    transition: width var(--t-fast), background-color var(--t-fast);
}

/* Üçüncü çizgi sarı ve kısa — markanın vurgusu */
.hamburger__bar:nth-child(3) {
    width: 65%;
    background-color: var(--c-yellow);
}

.hamburger:hover .hamburger__bar:nth-child(3) {
    width: 100%;
}


/* ---------- Mobil menü ---------- */
.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: var(--z-drawer);
    background-color: var(--c-black);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-1rem);
    transition: opacity var(--t-base), transform var(--t-base), visibility var(--t-base);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.mobile-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-menu__inner {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    padding-block: var(--sp-4) var(--sp-10);
}

.mobile-menu__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 2.25rem;
}

.mobile-menu__label {
    color: var(--c-yellow);
    font-size: 0.75rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.25em;
    text-transform: uppercase;
}

.mobile-menu__close {
    display: grid;
    place-items: center;
    width: 2.625rem;
    height: 2.625rem;
    margin-inline-end: -0.5rem;
    color: var(--c-white);
    transition: color var(--t-fast);
}

.mobile-menu__close:hover {
    color: var(--c-yellow);
}

/* Menü öğeleri */
.mobile-menu__nav {
    margin-block-start: var(--sp-10);
}

.mobile-menu__nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    padding-block: var(--sp-4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--c-white);
    font-size: 1.625rem;
    font-weight: var(--fw-extrabold);
    letter-spacing: -0.01em;
    line-height: 1.2;
    transition: color var(--t-fast);
}

.mobile-menu__nav a:hover {
    color: var(--c-yellow);
}

.mobile-menu__chevron {
    color: var(--c-yellow);
    font-size: 1.5rem;
    font-weight: var(--fw-bold);
    line-height: 1;
    transition: transform var(--t-fast);
}

.mobile-menu__nav a:hover .mobile-menu__chevron {
    transform: translateX(0.25rem);
}

/* Alt iletişim bloğu */
.mobile-menu__contact {
    display: flex;
    flex-direction: column;
    gap: var(--sp-5);
    margin-block-start: auto;
    padding-block-start: var(--sp-16);
}

.mobile-menu__contact-row {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    font-size: 0.9375rem;
    font-weight: var(--fw-bold);
    line-height: 1;
}

.mobile-menu__contact-row svg {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
    color: var(--c-yellow);
}

.mobile-menu__contact-row--yellow { color: var(--c-yellow); }
.mobile-menu__contact-row--white  { color: var(--c-white); }
.mobile-menu__contact-row--muted  { color: var(--c-gray-400); font-weight: var(--fw-medium); }


/* ---------- Masaüstü kırılımı ---------- */
@media (min-width: 768px) {
    .site-header {
        padding-block: clamp(0.875rem, calc(var(--vw) * 1.35), 1.625rem);
    }

    .logo {
        gap: clamp(0.8125rem, calc(var(--vw) * 1), 1.1875rem);
    }

    .logo__mark {
        height: clamp(3.125rem, calc(var(--vw) * 3.75), 4.375rem);
        width: auto;
    }

    .logo__text {
        font-size: clamp(0.9375rem, calc(var(--vw) * 1), 1.1875rem);
    }
}

@media (min-width: 1024px) {

    .nav {
        display: block;
        margin-inline-start: auto;
    }

    .lang-switch {
        margin-inline-start: 0;
    }

    .hamburger,
    .mobile-menu {
        display: none;
    }
}