.panel-bg {
    background-color: var(--panel-bg);
    background-image: var(--panel-noise), var(--panel-dot);
    background-size: 400px 400px, 22px 22px;
}

.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(20, 5, 45, 0.55);
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.sidebar-backdrop.is-visible {
    opacity: 1;
    visibility: visible;
}

.sidebar {
    position: fixed;
    top: var(--chrome-offset);
    left: var(--safe-left);
    bottom: var(--safe-bottom);
    width: min(var(--sidebar-width), calc(88vw - var(--safe-left)));
    z-index: 350;
    display: flex;
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform var(--transition);
    overflow: hidden;
    border-right: 3px solid var(--purple-dark);
    box-shadow: 6px 0 0 rgba(45, 10, 78, 0.6);
}

.sidebar.is-open {
    transform: translateX(0);
}

/* ── Brand bar in top grid ── */

.brand-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    height: 100%;
    min-height: var(--header-height);
}

.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--purple);
    border: 2px solid var(--purple-dark);
    color: #fff;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
    transition: transform 0.06s, box-shadow 0.06s;
}

.menu-toggle:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.menu-toggle__bars {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 18px;
}

.menu-toggle__bars span {
    display: block;
    height: 2px;
    background: currentColor;
    transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.is-open .menu-toggle__bars span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-open .menu-toggle__bars span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-open .menu-toggle__bars span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.logo {
    font-family: 'Press Start 2P', cursive;
    font-size: 9px;
    color: var(--purple);
    border: 3px solid var(--purple);
    padding: 7px 10px;
    box-shadow: var(--shadow-pixel);
    line-height: 1.7;
    text-align: center;
    background: var(--surface);
    letter-spacing: 1px;
    text-decoration: none;
    flex-shrink: 0;
}

/* ── Nav links as pixel buttons ── */

.sidebar__nav {
    flex: 1;
    padding: 16px 12px 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
}

.sidebar__section-label {
    font-family: 'Press Start 2P', cursive;
    font-size: 7px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--purple-soft);
    padding: 4px 4px 2px;
    line-height: 1.8;
}

.sidebar__link {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 14px;
    background: var(--purple);
    border: 2px solid var(--purple-dark);
    color: #fff;
    font-family: 'Press Start 2P', cursive;
    font-size: 8px;
    line-height: 1.6;
    text-align: left;
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: transform 0.06s, box-shadow 0.06s, background 0.12s;
}

.sidebar__link:hover {
    background: var(--purple-light);
}

.sidebar__link:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.sidebar__link.is-active {
    background: #fff;
    color: var(--purple-dark);
    border-color: var(--purple-soft);
    box-shadow: var(--shadow-sm);
}

.sidebar__link-icon {
    font-size: 14px;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
    font-family: 'Outfit', sans-serif;
}

.sidebar__divider {
    height: 20px;
    flex-shrink: 0;
}

.sidebar__footer {
    padding: 14px 16px;
    border-top: 2px solid rgba(192, 132, 252, 0.25);
    font-size: 11px;
    color: var(--purple-soft);
    line-height: 1.6;
    flex-shrink: 0;
}

@media (min-width: 900px) {
    .sidebar-backdrop {
        display: none;
    }

    .sidebar {
        transform: translateX(0);
    }

    .sidebar.is-collapsed {
        transform: translateX(-100%);
    }

    .logo {
        font-size: 10px;
    }
}