.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    height: 68px;
    background: rgba(255, 255, 255, 0.82);
    border-bottom: 1px solid rgba(193, 209, 232, 0.56);
    backdrop-filter: blur(22px);
}

.logo {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
}

.logo-icon {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-family: "Montserrat", sans-serif;
    font-size: 23px;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, #174eac, #082862);
    border-radius: 9px;
}

.logo-text {
    margin-left: 10px;
    color: #071d4f;
    font-family: "Montserrat", sans-serif;
    font-size: 25px;
    font-weight: 900;
    letter-spacing: -1px;
}

.logo-image {
    display: block;
    width: 158px;
    height: auto;
}

.site-nav {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    gap: 34px;
    color: #202532;
    font-size: 15px;
    font-weight: 700;
    white-space: nowrap;
}

.site-nav a {
    position: relative;
    padding: 25px 0 22px;
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 12px;
    width: 0;
    height: 2px;
    background: var(--blue);
    border-radius: 999px;
    transform: translateX(-50%);
    transition: width 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
    width: 24px;
}

.header-download {
    min-width: 142px;
    height: 42px;
    padding: 0 18px;
    display: none;
    align-items: center;
    justify-content: center;
    gap: 9px;
    color: #ffffff;
    font-size: 14px;
    font-weight: 900;
    background: linear-gradient(135deg, #1d73ff, #0753dd);
    border-radius: 999px;
    box-shadow: 0 14px 30px rgba(11, 90, 230, 0.24);
}

.header-download svg {
    width: 19px;
    height: 19px;
    fill: currentColor;
}