.nav {
    position: relative;
    z-index: 30;
}

.nav a,
.nav button {
    color: var(--color-level-1);
}

.nav-vertical {
    position: fixed;
    left: 56px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.nav-vertical .nav-item {
    position: relative;
    display: inline-flex;
    align-items: center;
    width: fit-content;
    font-size: 2.5rem;
    letter-spacing: 0.05em;
    opacity: 0.7;
    transition: opacity 0.25s var(--ease-standard), transform 0.25s var(--ease-standard);
}

.nav-vertical .nav-item::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -8px;
    border-bottom: 1px solid var(--divider);
}

.nav-vertical .nav-item:hover,
.nav-vertical .nav-item.is-hover {
    opacity: 1;
    transform: translateX(1.2rem) scale(1.07);
}

.nav-horizontal {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-4) var(--space-10);
    border-bottom: 1px solid var(--divider);
    backdrop-filter: blur(2px);
}

.nav-back {
    border: 0;
    padding: 0;
    background: transparent;
    font-family: var(--font-ui);
    letter-spacing: 0.06em;
    opacity: var(--opacity-idle);
    cursor: pointer;
}

.nav-back:hover {
    opacity: 1;
}

.nav-row {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    flex: 1;
}

.nav-horizontal .nav-item {
    letter-spacing: 0.05em;
    font-family: var(--font-ui);
    font-size: 0.92rem;
    opacity: var(--opacity-idle);
}

.nav-horizontal .nav-item:hover,
.nav-horizontal .nav-item.is-active {
    opacity: 1;
}

.nav-avatar {
    margin-left: auto;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--divider);
    overflow: hidden;
}

.nav-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}