.site-header {
    position: sticky;
    top: 0;
    z-index: 1100;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: background var(--transition), box-shadow var(--transition), border-color var(--transition), backdrop-filter var(--transition);
    border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
    background: rgba(7, 19, 31, 0.68);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
    backdrop-filter: blur(18px);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(14px, 2vw, 28px);
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: var(--color-light);
    font-weight: 700;
    letter-spacing: 0.02em;
    flex: 0 0 auto;
    min-width: 0;
}

.logo-img {
    width: clamp(78px, 8vw, 104px);
    height: clamp(78px, 8vw, 104px);
    object-fit: contain;
    display: block;
    flex: 0 0 auto;
}

.logo-mark {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: var(--gradient-primary);
    color: #04111b;
    font-weight: 800;
    box-shadow: 0 12px 24px rgba(26, 167, 255, 0.24);
}

.logo-text {
    font-size: clamp(1.45rem, 2.15vw, 1.9rem);
    line-height: 1.08;
    white-space: nowrap;
}

.navbar-collapse {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: clamp(12px, 1.6vw, 22px);
    flex: 1 1 auto;
    min-width: 0;
}

.navbar-collapse ul {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(4px, 0.7vw, 10px);
    list-style: none;
    margin: 0;
    padding: 0;
    min-width: 0;
}

.navbar-collapse a {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 clamp(10px, 1vw, 16px);
    color: rgba(247, 251, 255, 0.9);
    border-radius: 999px;
    line-height: 1;
    white-space: nowrap;
    transition: color var(--transition), background var(--transition), transform var(--transition);
}

.navbar-collapse a::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 7px;
    height: 2px;
    border-radius: 999px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition);
}

.navbar-collapse a:hover,
.navbar-collapse a:focus-visible,
.navbar-collapse a.is-active,
.navbar-collapse a[aria-current="page"],
.navbar-collapse a[aria-current="location"] {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    outline: none;
}

.navbar-collapse a:hover::after,
.navbar-collapse a:focus-visible::after,
.navbar-collapse a.is-active::after,
.navbar-collapse a[aria-current="page"]::after,
.navbar-collapse a[aria-current="location"]::after {
    transform: scaleX(1);
}

.header-tools {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 0 0 auto;
}

.language-switcher {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    flex: 0 0 auto;
    max-width: 100%;
}

.lang-btn {
    min-width: 48px;
    height: 40px;
    padding: 0 14px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: rgba(247, 251, 255, 0.84);
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.lang-btn:hover,
.lang-btn:focus-visible {
    color: #ffffff;
    outline: none;
    transform: translateY(-1px);
}

.lang-btn.active {
    background: var(--gradient-primary);
    color: #04111b;
    box-shadow: 0 12px 24px rgba(26, 167, 255, 0.24);
}

.nav-cta {
    min-width: 180px;
}

.navbar-toggler {
    display: none;
    width: 50px;
    height: 50px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.08);
    cursor: pointer;
    flex: 0 0 auto;
}

.navbar-toggler span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 5px auto;
    border-radius: 999px;
    background: #ffffff;
    transition: transform var(--transition), opacity var(--transition);
}

.navbar-toggler.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar-toggler.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggler.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.inner-page-header {
    background: rgba(2, 6, 10, 0.842);
    border-color: rgba(17, 6, 6, 0);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
    backdrop-filter: blur(18px);
}