/* ==========================================================================
   LAYOUT — Header, navigasyon, mobil menü, footer
   ========================================================================== */

main {
    position: relative;
    z-index: 1;
}

/* ============================================================== HEADER */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: var(--z-header);
    padding-block: 16px;
    transition: background var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                padding var(--dur) var(--ease);
    border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
    padding-block: 10px;
    background: rgba(6, 19, 42, .82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom-color: var(--border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* --------------------------------------------------------------- Marka */
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand__mark {
    display: grid;
    place-items: center;
    width: 44px; height: 44px;
    border-radius: 14px;
    background: linear-gradient(145deg, rgba(77, 143, 219, .18), rgba(77, 143, 219, .04));
    border: 1px solid rgba(77, 143, 219, .28);
    transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.brand__mark img { width: 26px; height: 26px; }

.brand:hover .brand__mark {
    transform: rotate(-6deg) scale(1.05);
    box-shadow: var(--glow);
}

.brand__text {
    display: flex;
    flex-direction: column;
    line-height: 1.05;
}

.brand__title {
    font-size: 1.05rem;
    font-weight: 900;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--accent-light);
}

.brand__subtitle {
    font-size: .6rem;
    font-weight: 600;
    letter-spacing: .32em;
    text-transform: uppercase;
    color: var(--text-dim);
}

/* ---------------------------------------------------------- Ana menü */
.nav__list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav__link {
    position: relative;
    display: block;
    padding: 10px 16px;
    border-radius: var(--radius-full);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.nav__link::after {
    content: '';
    position: absolute;
    left: 16px; right: 16px; bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur) var(--ease);
}

.nav__link:hover { color: var(--text); }
.nav__link:hover::after { transform: scaleX(1); }

.nav__link.is-active {
    color: var(--accent-light);
    background: rgba(77, 143, 219, .08);
}
.nav__link.is-active::after { transform: scaleX(1); }

/* ------------------------------------------------------- Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 13px;
    border-radius: 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.hamburger:hover {
    border-color: rgba(77, 143, 219, .45);
    background: var(--surface-hover);
}

.hamburger__bar {
    display: block;
    width: 22px; height: 2px;
    border-radius: 2px;
    background: var(--text);
    transition: width var(--dur) var(--ease);
}

.hamburger__bar--accent {
    width: 14px;
    background: var(--accent);
}

.hamburger:hover .hamburger__bar:first-child { width: 14px; }
.hamburger:hover .hamburger__bar--accent     { width: 22px; }

/* --------------------------------------------------- Mobil tam menü */
.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: var(--z-menu);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 32px;
    background: var(--bg);
    background-image: radial-gradient(circle at 50% 0%, rgba(77, 143, 219, .12), transparent 55%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-slow) var(--ease-out),
                visibility var(--dur-slow) var(--ease-out);
}

.mobile-menu[hidden] { display: none; }

.mobile-menu.is-open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu__close {
    position: absolute;
    top: 24px; right: 24px;
    display: grid;
    place-items: center;
    width: 52px; height: 52px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--accent-deep);
    box-shadow: var(--glow);
    transition: transform var(--dur) var(--ease);
}

.mobile-menu__close:hover { transform: rotate(90deg); }

.mobile-menu__nav ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: center;
}

.mobile-menu__nav a {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 14px;
    padding: 10px 20px;
    font-size: clamp(1.7rem, 8vw, 2.4rem);
    font-weight: 900;
    letter-spacing: -.02em;
    color: var(--text);
}

.mobile-menu__nav a.is-active,
.mobile-menu__nav a:hover { color: var(--accent); }

.mobile-menu__index {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .2em;
    color: var(--accent);
    opacity: .7;
}

.mobile-menu__cta { min-width: 240px; }

.mobile-menu__tagline {
    font-size: .65rem;
    font-weight: 600;
    letter-spacing: .34em;
    text-transform: uppercase;
    color: var(--text-dim);
}

/* ============================================================== FOOTER */
.site-footer {
    position: relative;
    z-index: 1;
    margin-top: clamp(60px, 8vw, 120px);
    padding-block: clamp(48px, 6vw, 80px) 32px;
    background: linear-gradient(180deg, transparent, rgba(6, 19, 42, .9));
    border-top: 1px solid var(--border);
}

.site-footer__top {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 48px;
}

.footer-logo {
    display: block;
    font-size: 1.9rem;
    font-weight: 900;
    letter-spacing: .2em;
    color: var(--accent-light);
}

.site-footer__desc {
    margin-top: 14px;
    max-width: 42ch;
    font-size: .88rem;
    color: var(--text-muted);
}

.site-footer__heading {
    margin-bottom: 18px;
    font-size: .7rem;
    font-weight: 800;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--accent);
}

.site-footer__col ul {
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.site-footer__col a,
.site-footer__col span {
    font-size: .88rem;
    color: var(--text-muted);
}

.site-footer__col a:hover { color: var(--accent-light); }

/* Sosyal ikonlar */
.social {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.social a {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 9px 16px;
    border-radius: var(--radius-full);
    background: var(--surface);
    border: 1px solid var(--border);
    font-size: .78rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: all var(--dur) var(--ease);
}

.social a:hover {
    color: var(--accent-deep);
    background: var(--accent);
    border-color: var(--accent);
}

.site-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
    font-size: .74rem;
    color: var(--text-dim);
}

.site-footer__tagline {
    font-weight: 700;
    letter-spacing: .26em;
    text-transform: uppercase;
    color: var(--accent);
    opacity: .8;
}