/* Header */

.site-header {
    position: relative;
    z-index: 50;
    border-bottom: 1px solid rgba(226, 233, 245, 0.72);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
}

.site-header__inner {
    display: grid;
    min-height: 84px;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: clamp(28px, 5vw, 80px);
}

.brand {
    display: inline-flex;
    align-items: center;
    color: var(--ink);
    text-decoration: none;
}

.brand__mark {
    position: relative;
    width: 48px;
    height: 48px;
    margin-right: 8px;
    overflow: hidden;
    flex: 0 0 auto;
}

.brand__mark img {
    position: absolute;
    width: 76px;
    max-width: none;
    height: 76px;
    top: -14px;
    left: -14px;
}

.brand__name {
    font-size: 1.28rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.primary-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(24px, 3.4vw, 52px);
}

.primary-nav a,
.header-email {
    flex-shrink: 0;
    color: var(--ink-soft);
    font-size: 0.96rem;
    font-weight: 600;
    white-space: nowrap;
    text-decoration: none;
    transition: color 150ms ease;
}

.primary-nav a:hover,
.header-email:hover {
    color: var(--blue);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

.header-email {
    display: inline-flex;
    align-items: center;
    gap: 9px;
}

.header-email svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: var(--blue);
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.nav-toggle {
    display: none;
}

.nav-item {
    position: relative;
}

.nav-item__trigger {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-submenu-toggle {
    display: grid;
    width: 26px;
    height: 26px;
    padding: 0;
    place-items: center;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--ink-soft);
    cursor: pointer;
}

.nav-submenu-toggle:hover,
.nav-submenu-toggle:focus-visible {
    background: var(--surface-blue);
    color: var(--blue);
}

.nav-submenu-toggle svg {
    width: 15px;
    height: 15px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    transition: transform 150ms ease;
}

.nav-item.is-open .nav-submenu-toggle svg,
.nav-item:focus-within .nav-submenu-toggle svg {
    transform: rotate(180deg);
}

.nav-submenu {
    position: absolute;
    z-index: 60;
    top: calc(100% + 20px);
    left: 50%;
    width: min(760px, calc(100vw - 48px));
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 28px 80px rgba(18, 43, 97, 0.18);
    opacity: 0;
    pointer-events: none;
    transform: translate(-36%, 8px);
    transition: opacity 150ms ease, transform 150ms ease;
}

.nav-submenu::before {
    content: "";
    position: absolute;
    right: 0;
    bottom: 100%;
    left: 0;
    height: 24px;
}

.nav-item--dropdown:hover .nav-submenu,
.nav-item--dropdown:focus-within .nav-submenu,
.nav-item--dropdown.is-open .nav-submenu {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-36%, 0);
}

.nav-submenu a {
    display: block;
    padding: 13px 14px;
    border-radius: 10px;
}

.nav-submenu a:hover {
    background: var(--surface-blue);
}

.nav-submenu a span,
.nav-submenu a small {
    display: block;
}

.nav-submenu a span {
    color: var(--ink);
    font-size: 0.94rem;
    font-weight: 750;
}

.nav-submenu a small {
    margin-top: 3px;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 500;
}

.nav-submenu__overview {
    margin-bottom: 8px;
    border: 1px solid #dce7f8;
    background: var(--surface);
}

.nav-submenu__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 8px;
}

/* Scroll state and micro-interactions */

.site-header {
    transition: box-shadow var(--duration-base) var(--ease-out),
        background var(--duration-base) var(--ease-out);
}

.site-header.is-scrolled {
    box-shadow: 0 12px 34px rgba(18, 43, 97, 0.1);
}

.brand__mark {
    transition: transform var(--duration-base) var(--ease-out);
}

.brand:hover .brand__mark {
    transform: rotate(-8deg) scale(1.06);
}

.header-actions .button {
    transition: transform var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out);
}