/**
 * Header & Navigasyon Stilleri
 * @package brk
 */

/* ============================================================
   SKIP LINK — Erişilebilirlik
   ============================================================ */

.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 9999;
    padding: 0.5rem 1rem;
    background: var(--brk-dark);
    color: var(--brk-white);
    border-radius: 0 0 var(--brk-radius-md) var(--brk-radius-md);
    font-size: var(--brk-text-sm);
    font-weight: var(--brk-weight-semi);
    transition: top var(--brk-transition);
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--brk-accent);
    outline-offset: 2px;
}

/* ============================================================
   HEADER — Ana yapı
   ============================================================ */

.brk-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(11, 14, 17, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--brk-dark-3);
    height: var(--brk-header-height);
    transition: box-shadow var(--brk-transition-slow);
}

.brk-header.is-scrolled {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.brk-header__inner {
    height: 100%;
}

.brk-header__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--brk-space-6);
    height: 100%;
}

/* ============================================================
   LOGO
   ============================================================ */

.brk-header__brand {
    flex-shrink: 0;
}

.brk-header__logo-text {
    display: flex;
    align-items: center;
    gap: var(--brk-space-2);
    text-decoration: none;
    color: var(--brk-white);
    font-weight: var(--brk-weight-bold);
    font-size: var(--brk-text-xl);
    letter-spacing: -0.02em;
    transition: opacity var(--brk-transition);
}

.brk-header__logo-text:hover {
    opacity: 0.85;
    text-decoration: none;
}

.brk-header__logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--brk-accent);
    color: var(--brk-dark);
    border-radius: var(--brk-radius-md);
    font-size: var(--brk-text-lg);
    font-weight: var(--brk-weight-bold);
    line-height: 1;
}

.brk-header__logo-name {
    color: var(--brk-white);
}

/* Custom logo image */
.brk-header__brand .custom-logo-link {
    display: block;
}

.brk-header__brand .custom-logo {
    height: 40px;
    width: auto;
    display: block;
}

/* ============================================================
   ANA NAVİGASYON — Masaüstü
   ============================================================ */

.brk-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.brk-nav__list {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.brk-nav__item {
    position: relative;
}

.brk-nav__link {
    display: flex;
    align-items: center;
    gap: var(--brk-space-1);
    padding: var(--brk-space-2) var(--brk-space-4);
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--brk-text-sm);
    font-weight: var(--brk-weight-medium);
    text-decoration: none;
    border-radius: var(--brk-radius-md);
    white-space: nowrap;
    transition: color var(--brk-transition), background var(--brk-transition);
}

.brk-nav__link:hover,
.brk-nav__item.is-active > .brk-nav__link {
    color: var(--brk-white);
    background: rgba(255, 255, 255, 0.08);
    text-decoration: none;
}

/* Mevcut sayfa vurgusu */
.brk-nav__item.is-active > .brk-nav__link {
    color: var(--brk-accent);
}

/* Chevron ikonu */
.brk-nav__chevron {
    display: flex;
    align-items: center;
    transition: transform var(--brk-transition);
}

.brk-nav__item--has-children:hover .brk-nav__chevron,
.brk-nav__item--has-children:focus-within .brk-nav__chevron {
    transform: rotate(180deg);
}

/* ============================================================
   DROPDOWN MENÜ
   ============================================================ */

.brk-nav__dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    background: var(--brk-dark-2);
    border: 1px solid var(--brk-dark-3);
    border-radius: var(--brk-radius-lg);
    box-shadow: var(--brk-shadow-xl);
    list-style: none;
    margin: 0;
    padding: var(--brk-space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-8px);
    transition: opacity var(--brk-transition), visibility var(--brk-transition), transform var(--brk-transition);
    z-index: 100;
}

/* Ok işareti */
.brk-nav__dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--brk-dark-2);
    border-top: 1px solid var(--brk-dark-3);
    border-left: 1px solid var(--brk-dark-3);
    transform: translateX(-50%) rotate(45deg);
}

.brk-nav__item--has-children:hover .brk-nav__dropdown,
.brk-nav__item--has-children:focus-within .brk-nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.brk-nav__dropdown .brk-nav__link {
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--brk-radius-md);
    padding: var(--brk-space-2) var(--brk-space-4);
    font-size: var(--brk-text-sm);
}

.brk-nav__dropdown .brk-nav__link:hover {
    color: var(--brk-accent);
    background: rgba(240, 185, 11, 0.08);
}

/* ============================================================
   HEADER SAĞ: ACTIONS
   ============================================================ */

.brk-header__actions {
    display: flex;
    align-items: center;
    gap: var(--brk-space-3);
    flex-shrink: 0;
}

/* Referans kodu chip */
.brk-header__ref-chip {
    display: flex;
    align-items: center;
    gap: var(--brk-space-2);
    background: rgba(240, 185, 11, 0.1);
    border: 1px solid rgba(240, 185, 11, 0.2);
    border-radius: var(--brk-radius-full);
    padding: var(--brk-space-1) var(--brk-space-3);
}

.brk-header__ref-label {
    font-size: var(--brk-text-xs);
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
}

.brk-header__ref-code {
    font-family: var(--brk-font-mono);
    font-size: var(--brk-text-sm);
    font-weight: var(--brk-weight-bold);
    color: var(--brk-accent);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    letter-spacing: 0.05em;
    transition: opacity var(--brk-transition);
}

.brk-header__ref-code:hover {
    opacity: 0.75;
}

.brk-header__cta-btn {
    white-space: nowrap;
}

/* ============================================================
   TOAST (kopyalama bildirimi)
   ============================================================ */

.brk-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(1rem);
    background: var(--brk-gray-900);
    color: var(--brk-white);
    padding: var(--brk-space-3) var(--brk-space-6);
    border-radius: var(--brk-radius-full);
    font-size: var(--brk-text-sm);
    font-weight: var(--brk-weight-medium);
    box-shadow: var(--brk-shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
    z-index: 9999;
    white-space: nowrap;
    pointer-events: none;
}

.brk-toast.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.brk-toast--success {
    background: var(--brk-success);
}

/* ============================================================
   MOBİL TOGGLE BUTONU
   ============================================================ */

.brk-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--brk-radius-md);
    cursor: pointer;
    padding: 8px;
    transition: border-color var(--brk-transition);
}

.brk-nav-toggle:hover {
    border-color: rgba(255, 255, 255, 0.35);
}

.brk-nav-toggle__bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--brk-white);
    border-radius: 2px;
    transition: transform var(--brk-transition), opacity var(--brk-transition);
    transform-origin: center;
}

/* Açık durumda X animasyonu */
.brk-nav-toggle[aria-expanded="true"] .brk-nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.brk-nav-toggle[aria-expanded="true"] .brk-nav-toggle__bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.brk-nav-toggle[aria-expanded="true"] .brk-nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   MOBİL RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
    .brk-header__ref-chip {
        display: none;
    }
}

@media (max-width: 768px) {
    .brk-header__cta-btn {
        display: none; /* Mobilde sadece toggle göster */
    }

    .brk-nav-toggle {
        display: flex;
    }

    /* Mobil nav — drawer */
    .brk-nav {
        position: fixed;
        top: var(--brk-header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--brk-dark);
        border-top: 1px solid var(--brk-dark-3);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--brk-space-6) var(--brk-space-4);
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform var(--brk-transition-slow);
        z-index: 999;
    }

    .brk-nav.is-open {
        transform: translateX(0);
    }

    .brk-nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: var(--brk-space-1);
        width: 100%;
    }

    .brk-nav__link {
        font-size: var(--brk-text-base);
        padding: var(--brk-space-3) var(--brk-space-4);
        color: rgba(255, 255, 255, 0.85);
    }

    /* Mobilde dropdown açık kalır */
    .brk-nav__dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: rgba(255, 255, 255, 0.04);
        border: none;
        border-radius: var(--brk-radius-md);
        box-shadow: none;
        padding: var(--brk-space-1) 0;
        margin-left: var(--brk-space-4);
        margin-top: var(--brk-space-1);
    }

    .brk-nav__dropdown::before {
        display: none;
    }

    /* Mobil CTA — nav içinde göster */
    .brk-nav::after {
        content: '';
        display: block;
        height: var(--brk-space-6);
    }

    .brk-nav__mobile-cta {
        display: block;
        margin-top: var(--brk-space-6);
    }

    /* Scroll kilidi */
    body.nav-is-open {
        overflow: hidden;
    }
}

@media (max-width: 480px) {
    .brk-header__row {
        gap: var(--brk-space-3);
    }

    .brk-header__logo-name {
        font-size: var(--brk-text-lg);
    }
}