/* ==========================================================================
   Global Shell: Header (By Kadir — KW Talya & By Kadir Dual Brand)
   Transparent Overlay by Default + Solid Glassmorphic when Scrolled
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: transparent;
    border-bottom: 1px solid transparent;
    z-index: var(--z-header, 1000);
    transition: background-color 300ms cubic-bezier(0.4, 0, 0.2, 1),
        backdrop-filter 300ms cubic-bezier(0.4, 0, 0.2, 1),
        -webkit-backdrop-filter 300ms cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1),
        border-color 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-wide, 1320px);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--container-padding, 24px);
    height: 82px;
    box-sizing: border-box;
    transition: height var(--transition-base, 250ms ease);
}

.site-header.is-scrolled .header-container {
    height: 72px;
}

/* ─── Marka & Çift Logo Ünitesi ─── */
.header-brand {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-unit {
    display: inline-flex;
    align-items: center;
    gap: 14px;
}

.logo-slot {
    position: relative;
    display: inline-grid;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    align-items: center;
    justify-items: start;
    flex-shrink: 0;
}

.logo-slot-bykadir {
    width: 134px;
    height: 54px;
}

.logo-slot-kw {
    width: 64px;
    height: 26px;
}

.logo-bykadir {
    grid-area: 1/1;
    height: 54px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    transition: opacity 250ms ease, transform var(--transition-fast, 150ms ease);
}

.site-header.is-scrolled .logo-slot-bykadir {
    width: 122px;
    height: 48px;
}

.site-header.is-scrolled .logo-bykadir {
    height: 48px;
}

.logo-kw {
    grid-area: 1/1;
    height: 26px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    transition: opacity 250ms ease, transform var(--transition-fast, 150ms ease);
}

/* Logo State Cross-Fade (Zero Layout Shift) */
.site-header .logo-light {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.site-header .logo-dark {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.site-header.is-scrolled .logo-light {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.site-header.is-scrolled .logo-dark {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.kw-partner-unit {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 2px;
}

.kw-partner-badge {
    font-size: 8.5px;
    font-weight: 600;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    color: #FFFFFF;
    line-height: 1;
    white-space: nowrap;
    transition: color var(--transition-fast, 150ms ease);
}

.site-header.is-scrolled .kw-partner-badge {
    color: #6C727F;
}

.brand-separator {
    display: inline-block;
    width: 1px;
    height: 28px;
    background-color: rgba(255, 255, 255, 0.28);
    transition: background-color var(--transition-fast, 150ms ease);
    flex-shrink: 0;
}

.site-header.is-scrolled .brand-separator {
    background-color: var(--color-border, #EAEAE5);
}

.header-brand:hover .logo-kw,
.header-brand:hover .logo-bykadir {
    transform: scale(1.02);
}

.site-header:not(.is-scrolled) .header-brand:hover .kw-partner-badge {
    color: #FFFFFF;
}

.site-header.is-scrolled .header-brand:hover .kw-partner-badge {
    color: var(--color-primary, #B4010F);
}

@media (max-width: 768px) {
    .site-header.is-scrolled {
        background-color: #FFFFFF;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        box-shadow: 0 3px 14px rgba(0, 0, 0, 0.06);
    }

    .header-container {
        height: 72px;
        padding: 0 16px;
    }

    .site-header.is-scrolled .header-container {
        height: 72px;
    }

    .brand-unit {
        gap: 10px;
    }

    .logo-slot-bykadir {
        width: 100px;
        height: 41px;
    }

    .logo-bykadir {
        height: 41px;
    }

    .brand-separator {
        height: 18px;
    }

    .logo-slot-kw {
        width: 54px;
        height: 22px;
    }

    .logo-kw {
        height: 22px;
    }
}

/* ─── Masaüstü Navigasyon ─── */
.header-nav {
    display: none;
    align-items: center;
    flex-shrink: 0;
}

@media (min-width: 992px) {
    .header-nav {
        display: flex;
    }
}

.header-nav .nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.header-nav .nav-item {
    position: relative;
    flex-shrink: 0;
}

.header-nav .nav-link {
    font-family: var(--font-body, 'Poppins', sans-serif);
    font-size: 15px;
    font-weight: 500;
    color: #FFFFFF;
    text-decoration: none;
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-fast, 150ms ease);
    display: inline-block;
    white-space: nowrap;
}

.site-header.is-scrolled .header-nav .nav-link {
    color: var(--color-dark, #101112);
}

.header-nav .nav-link:hover {
    color: #FFFFFF;
}

.site-header.is-scrolled .header-nav .nav-link:hover {
    color: var(--color-primary, #B4010F);
}

.header-nav .nav-link.active {
    color: #FFFFFF;
    font-weight: 600;
}

.site-header.is-scrolled .header-nav .nav-link.active {
    color: var(--color-primary, #B4010F);
    font-weight: 600;
}

.site-header.is-scrolled .header-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-primary, #B4010F);
    border-radius: 2px;
    transition: width var(--transition-fast, 150ms ease);
}

.site-header.is-scrolled .header-nav .nav-link:hover::after,
.site-header.is-scrolled .header-nav .nav-link.active::after {
    width: 100%;
}

/* ─── Dropdown Menü (Alt Menüler) ─── */
.nav-item-dropdown {
    position: relative;
}

.header-nav .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 210px;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border, #EAEAE5);
    border-radius: var(--radius-md, 12px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    padding: 8px 0;
    margin-top: 6px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.98);
    transform-origin: top left;
    transition: opacity 150ms ease, transform 150ms ease, visibility 150ms;
    z-index: var(--z-sticky, 900);
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.header-nav .dropdown-item {
    display: block;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-dark, #101112) !important;
    text-decoration: none;
    transition: background-color 150ms ease, color 150ms ease;
}

.header-nav .dropdown-item:hover {
    background-color: rgba(180, 1, 15, 0.06);
    color: var(--color-primary, #B4010F) !important;
}

.header-nav .dropdown-item::after {
    display: none !important;
}

/* ─── Sağ Aksiyonlar ─── */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.header-phone-link {
    display: none;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: #FFFFFF;
    text-decoration: none;
    transition: color var(--transition-fast, 150ms ease), opacity var(--transition-fast, 150ms ease);
}

.site-header.is-scrolled .header-phone-link {
    color: var(--color-dark, #101112);
}

.header-phone-link .phone-icon {
    color: #FFFFFF;
    font-size: 15px;
    transition: color var(--transition-fast, 150ms ease);
}

.site-header.is-scrolled .header-phone-link .phone-icon {
    color: var(--color-primary, #B4010F);
}

.header-phone-link:hover {
    color: #FFFFFF;
    opacity: 0.9;
}

.site-header.is-scrolled .header-phone-link:hover {
    color: var(--color-primary, #B4010F);
    opacity: 1;
}

@media (min-width: 1200px) {
    .header-phone-link {
        display: inline-flex;
    }
}

.header-cta-btn {
    display: none;
    align-items: center;
    background-color: var(--color-primary, #B4010F);
    color: #FFFFFF !important;
    border: none;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 22px;
    border-radius: var(--radius-sm, 8px);
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(180, 1, 15, 0.15);
    transition: all var(--transition-fast, 150ms ease);
}

@media (min-width: 576px) {
    .header-cta-btn {
        display: inline-flex;
    }
}

.header-cta-btn:hover {
    background-color: #92000C;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(180, 1, 15, 0.28);
    color: #FFFFFF !important;
}

.header-cta-btn:active {
    transform: translateY(0);
}

/* ─── Mobil Hamburger Butonu (Modern & Lüks) ─── */
.mobile-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    cursor: pointer;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.site-header.is-scrolled .mobile-menu-toggle {
    background: #FFFFFF;
    border: 1px solid rgba(16, 17, 18, 0.12);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    backdrop-filter: none;
}

@media (min-width: 992px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.mobile-menu-toggle:hover {
    border-color: var(--color-primary, #B4010F);
    background-color: rgba(180, 1, 15, 0.15);
    transform: translateY(-1px);
}

.site-header.is-scrolled .mobile-menu-toggle:hover {
    background-color: rgba(180, 1, 15, 0.04);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

.mobile-menu-toggle .hamburger-box {
    width: 22px;
    height: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-end;
}

.mobile-menu-toggle .hamburger-line {
    height: 2.2px;
    background-color: #FFFFFF;
    border-radius: 9999px;
    transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: right center;
}

.site-header.is-scrolled .mobile-menu-toggle .hamburger-line {
    background-color: var(--color-dark, #101112);
}

.mobile-menu-toggle .hamburger-line.line-top {
    width: 22px;
}

.mobile-menu-toggle .hamburger-line.line-mid {
    width: 15px;
}

.mobile-menu-toggle .hamburger-line.line-bot {
    width: 20px;
}

.mobile-menu-toggle:hover .hamburger-line {
    background-color: var(--color-primary, #B4010F);
    width: 22px;
}