.site-header {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 49px 57px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    text-decoration: none;
}

.brand-logo {
    width: 46px;
    height: 46px;
    flex-shrink: 0;
}

.brand-name {
    font-family: var(--font-accent);
    font-size: 40px;
    font-weight: 500;
    line-height: 53px;
}

.mode-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 13px;
}

.mode-toggle {
    position: relative;
    isolation: isolate;
}

.mode-indicator {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    border-radius: var(--radius-sm);
    background: var(--accent);
    opacity: 0;
    pointer-events: none;
    transition: transform 380ms cubic-bezier(0.34, 1.36, 0.64, 1), width 380ms cubic-bezier(0.34, 1.36, 0.64, 1), opacity 200ms ease;
}

.mode-toggle.has-indicator .mode-indicator {
    opacity: 1;
}

.mode-toggle.has-indicator .mode-btn.active {
    background: transparent;
}

.mode-btn {
    position: relative;
    z-index: 1;
    padding: 6px 18px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    font-family: var(--font-accent);
    font-size: 20px;
    font-weight: 400;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast), transform 120ms ease;
}

.mode-btn:active {
    transform: scale(0.96);
}

.mode-btn:hover:not(.active) {
    background: var(--bg-hover);
}

.mode-btn.active {
    background: var(--accent);
}