/* Zeytrade — Header / Navigasyon (cinematic redesign) */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    z-index: 1300;
    background: var(--zt-amber-500);
    transition: width 0.1s linear;
}

.site-header {
    position: fixed;
    inset-inline: 0;
    top: 0;
    z-index: 1100;
    height: var(--header-height);
    display: flex;
    align-items: center;
    background: rgba(5, 14, 36, 0.62);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    transition: background 0.3s var(--ease-standard), box-shadow 0.3s var(--ease-standard);
}

.site-header.is-scrolled {
    background: rgba(5, 14, 36, 0.85);
    box-shadow: 0 8px 32px rgba(5, 14, 36, 0.4);
}

.navbar {
    width: 100%;
    max-width: 1440px;
    margin-inline: auto;
    padding-inline: var(--gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    color: var(--zt-white);
    flex-shrink: 0;
}

.navbar-brand img {
    height: 38px;
    width: 38px;
    border-radius: 50%;
}

.navbar-brand-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2.25rem;
    margin: 0;
    padding: 0;
}

.nav-links a {
    display: inline-flex;
    align-items: baseline;
    gap: 0.4rem;
    color: rgba(228, 232, 238, 0.62);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
    transition: color 0.25s var(--ease-standard), border-color 0.25s var(--ease-standard);
}

.nav-links a .nav-num {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 400;
    opacity: 0.6;
    text-transform: none;
    letter-spacing: 0;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--zt-white);
}

.nav-links a.is-active {
    color: var(--zt-white);
    border-bottom-color: var(--zt-amber-500);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

/* Sade satır içi dil listesi: DE / EN / TR */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: rgba(228, 232, 238, 0.4);
}

.lang-switch a {
    color: rgba(228, 232, 238, 0.55);
    transition: color 0.2s var(--ease-standard);
}

.lang-switch a:hover {
    color: var(--zt-white);
}

.lang-switch a.is-active {
    color: var(--zt-white);
}

.header-cta {
    padding: 0.7rem 1.4rem !important;
    font-size: 0.8rem !important;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.22);
    cursor: pointer;
    padding: 0;
}

.nav-toggle-line {
    position: relative;
    width: 18px;
    height: 1.5px;
    background: var(--zt-white);
    display: block;
    transition: transform 0.3s var(--ease-standard), opacity 0.3s var(--ease-standard);
}

.nav-toggle-line::before,
.nav-toggle-line::after {
    content: '';
    position: absolute;
    left: 0;
    width: 18px;
    height: 1.5px;
    background: var(--zt-white);
    transition: transform 0.3s var(--ease-standard), opacity 0.3s var(--ease-standard);
}

.nav-toggle-line::before { top: -6px; }
.nav-toggle-line::after { top: 6px; }

@media (max-width: 1099.98px) {
    .nav-toggle {
        display: flex;
    }

    .header-cta,
    .lang-switch {
        display: none;
    }

    .navbar-brand-name {
        font-size: 0.8rem;
        letter-spacing: 0.1em;
    }

    .nav-links {
        position: fixed;
        inset: 0;
        /* .navbar bir flex konteyneri olduğundan, position:fixed olsa bile
           bazı tarayıcılar bu öğeyi hâlâ flex boyutlandırma algoritmasına
           göre ölçüyor ve height:auto içeriğe sarılıyor (inset:0 görmezden
           geliniyor). Height'i açıkça tam ekran olarak zorlamak bu tuhaflığı
           giderir. */
        height: 100vh;
        height: 100dvh;
        z-index: 1250;
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        background: rgba(5, 14, 36, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 6rem 2rem 3rem;
        gap: 0.75rem;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.35s var(--ease-standard), visibility 0s linear 0.35s;
    }

    .nav-links.is-open {
        opacity: 1;
        visibility: visible;
        transition: opacity 0.35s var(--ease-standard);
    }

    .nav-links a {
        font-family: var(--font-heading);
        font-weight: 700;
        font-size: clamp(2.5rem, 11vw, 4.5rem);
        line-height: 1;
        text-transform: uppercase;
        color: var(--zt-white);
        border-bottom: none;
        padding-bottom: 0;
    }

    .nav-links a .nav-num {
        font-size: 0.7rem;
        color: var(--zt-amber-500);
        opacity: 1;
    }

    .nav-links a.is-active {
        color: var(--zt-amber-500);
    }

    .mobile-lang {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-family: var(--font-mono);
        font-size: 0.75rem;
        letter-spacing: 0.12em;
        color: rgba(228, 232, 238, 0.5);
        margin-top: 3rem;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
        padding-top: 1.5rem;
        width: 100%;
    }

    .mobile-lang a.is-active {
        color: var(--zt-amber-500);
    }

    .nav-close {
        position: absolute;
        top: 1.5rem;
        right: 1.75rem;
        width: 44px;
        height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        border: 1px solid rgba(255, 255, 255, 0.2);
        color: var(--zt-white);
        z-index: 1260;
        cursor: pointer;
    }
}

@media (min-width: 1100px) {
    .mobile-lang,
    .nav-close {
        display: none;
    }
}

@media (min-width: 768px) and (max-width: 1099.98px) {
    .navbar-brand-name {
        font-size: 0.92rem;
        letter-spacing: 0.13em;
    }

    .nav-links a {
        font-size: clamp(2.75rem, 8vw, 4rem);
    }
}

@media (max-width: 575.98px) {
    .navbar-brand-name {
        font-size: 0.72rem;
        letter-spacing: 0.06em;
    }

    .navbar-brand {
        gap: 0.6rem;
    }
}