/* Header — minimal, hairline divider */
.gr-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--gr-header-height);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--gr-border-faint);
    transition: border-color var(--gr-transition);
}

.gr-header--scrolled {
    border-bottom-color: var(--gr-border);
}

.gr-header > .gr-container {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 32px;
}

/* Logo */
.gr-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.gr-logo img {
    height: 55px;
    width: auto;
    /* filter: brightness(0) invert(1); */
}

/* Navigation */
.gr-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: 24px;
    margin-right: auto;
}

.gr-nav__link {
    padding: 6px 12px;
    border-radius: var(--gr-radius-xs);
    font-family: var(--gr-font-body);
    font-size: var(--gr-fs-small);
    font-weight: 500;
    color: var(--gr-text-muted);
    transition: color var(--gr-transition);
    text-transform: none;
    letter-spacing: -0.01em;
}

.gr-nav__link:hover,
.gr-nav__link--active {
    color: var(--gr-white);
}

/* Header Actions */
.gr-header__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Burger */
.gr-burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.gr-burger span {
    display: block;
    width: 100%;
    height: 1.5px;
    background: var(--gr-white);
    border-radius: 2px;
    transition: transform var(--gr-transition), opacity var(--gr-transition);
}

.gr-burger--active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.gr-burger--active span:nth-child(2) {
    opacity: 0;
}

.gr-burger--active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Spacer for fixed header */
main {
    padding-top: var(--gr-header-height);
}