.login-section {
            position: relative;
            overflow: hidden;
            background: linear-gradient(180deg, rgba(255,255,255,.68), rgba(255,255,255,.46));
            border: 1px solid rgba(255,255,255,.34);
            border-radius: var(--radius-panel);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: 0 22px 42px rgba(15,23,42,.10);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }
        .login-section::before {
            content: "";
            position: absolute;
            inset: 0;
            pointer-events: none;
            background:
                radial-gradient(circle at top left, rgba(var(--accent-rgb), .14), transparent 34%),
                radial-gradient(circle at bottom right, rgba(255,255,255,.42), transparent 28%);
        }
        .login-section > * {
            position: relative;
            z-index: 1;
        }
        body.dark .login-section {
            background: linear-gradient(180deg, rgba(30,41,59,.56), rgba(15,23,42,.52));
            border-color: rgba(255,255,255,.10);
            box-shadow: 0 24px 44px rgba(0,0,0,.24);
        }
        .login-section h3 {
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .login-input {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .single-login-input {
            align-items: flex-end;
        }
        .login-field {
            flex: 1 1 320px;
            min-width: 220px;
        }
        .login-field label {
            display: block;
            margin-bottom: 8px;
            font-weight: 700;
            color: var(--text-secondary);
        }
        .single-login-input .btn {
            min-width: 124px;
        }
        .login-input input {
            flex: 1;
            min-width: 150px;
            padding: 12px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-pill);
            background: var(--input-bg);
            color: var(--text-primary);
        }
        .user-info {
            display: flex;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            background: var(--bg-panel);
            padding: 16px 24px;
            border-radius: var(--radius-pill);
        }
        .user-login-state {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .user-login-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 0 6px rgba(34,197,94,.14);
            flex: 0 0 auto;
        }
        .user-login-meta {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .user-login-meta strong {
            color: var(--text-primary);
            font-size: 0.98rem;
        }
        .user-login-meta span {
            color: var(--text-secondary);
            font-size: 0.92rem;
        }
        .user-info label {
            font-weight: 500;
            color: var(--text-secondary);
        }
        .room-tabs-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .room-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 0;
            flex-wrap: wrap;
        }
        .tab-aux-btn {
            transition: transform .18s ease, box-shadow .18s ease, color .18s ease;
            padding: 10px 20px;
            border: 1px solid var(--btn-secondary-border);
            background: linear-gradient(180deg, var(--btn-secondary-bg), rgba(var(--accent-rgb), .06));
            border-radius: var(--radius-pill);
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            white-space: nowrap;
            box-shadow: 0 10px 20px rgba(15,23,42,.08);
        }
        .tab-aux-btn:hover {
            transform: translateY(-1px);
            color: var(--accent);
            border-color: var(--accent-outline);
            box-shadow: 0 10px 22px rgba(var(--accent-rgb), .14);
        }
        .tab-btn {
            padding: 10px 24px;
            border: 1px solid var(--border-light);
            background: transparent;
            border-radius: var(--radius-pill);
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            pointer-events: auto !important;
        }
        .tab-btn.active {
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: var(--text-on-accent);
            border-color: var(--accent);
            box-shadow: 0 14px 24px rgba(var(--accent-rgb), .18);
        }
        .tab-content {
            display: none;
            margin-top: 20px;
        }
        .tab-content.active {
            display: block;
        }
        .room-list {
            background: transparent;
            border-radius: 0;
            padding: 4px;
            max-height: 300px;
            overflow-y: auto;
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
            align-content: flex-start;
        }
        .room-list-empty {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 188px;
            padding: 26px 18px;
            text-align: center;
            border: 1px dashed rgba(148,163,184,.26);
            border-radius: 18px;
            background: linear-gradient(180deg, rgba(255,255,255,.9), rgba(248,250,252,.76));
            box-shadow: inset 0 1px 0 rgba(255,255,255,.7), 0 12px 26px rgba(15,23,42,.05);
        }
        .room-list-empty.is-loading {
            min-height: 148px;
        }
        .room-list-empty.is-filtered {
            min-height: 156px;
        }
        .room-list-empty-emoji {
            font-size: 2rem;
            line-height: 1;
        }
        .room-list-empty-title {
            color: var(--text-primary);
            font-size: 1rem;
            font-weight: 800;
            line-height: 1.4;
        }
        .room-list-empty-desc {
            max-width: 360px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        body.dark .room-list-empty {
            background: linear-gradient(180deg, rgba(30,41,59,.82), rgba(15,23,42,.88));
            border-color: rgba(71,85,105,.38);
            box-shadow: inset 0 1px 0 rgba(255,255,255,.03), 0 14px 28px rgba(0,0,0,.2);
        }
        .room-list,
        .member-action-popover,
        .room-settings-dialog,
        #room-chat-messages,
        .karaoke-results,
        .karaoke-lyrics-list,
        .karaoke-rank-floating-song-list {
            scrollbar-width: thin;
            scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
        }
        .room-list::-webkit-scrollbar,
        .member-action-popover::-webkit-scrollbar,
        .room-settings-dialog::-webkit-scrollbar,
        #room-chat-messages::-webkit-scrollbar,
        .karaoke-results::-webkit-scrollbar,
        .karaoke-lyrics-list::-webkit-scrollbar,
        .karaoke-rank-floating-song-list::-webkit-scrollbar {
            width: var(--scrollbar-size);
            height: var(--scrollbar-size);
        }
        .room-list::-webkit-scrollbar-track,
        .member-action-popover::-webkit-scrollbar-track,
        .room-settings-dialog::-webkit-scrollbar-track,
        #room-chat-messages::-webkit-scrollbar-track,
        .karaoke-results::-webkit-scrollbar-track,
        .karaoke-lyrics-list::-webkit-scrollbar-track,
        .karaoke-rank-floating-song-list::-webkit-scrollbar-track {
            background: var(--scrollbar-track);
            border-radius: 999px;
        }
        .room-list::-webkit-scrollbar-thumb,
        .member-action-popover::-webkit-scrollbar-thumb,
        .room-settings-dialog::-webkit-scrollbar-thumb,
        #room-chat-messages::-webkit-scrollbar-thumb,
        .karaoke-results::-webkit-scrollbar-thumb,
        .karaoke-lyrics-list::-webkit-scrollbar-thumb,
        .karaoke-rank-floating-song-list::-webkit-scrollbar-thumb {
            background: var(--scrollbar-thumb);
            border: 2px solid transparent;
            border-radius: 999px;
            background-clip: padding-box;
            min-height: 36px;
        }
        .room-list::-webkit-scrollbar-thumb:hover,
        .member-action-popover::-webkit-scrollbar-thumb:hover,
        .room-settings-dialog::-webkit-scrollbar-thumb:hover,
        #room-chat-messages::-webkit-scrollbar-thumb:hover,
        .karaoke-results::-webkit-scrollbar-thumb:hover,
        .karaoke-lyrics-list::-webkit-scrollbar-thumb:hover,
        .karaoke-rank-floating-song-list::-webkit-scrollbar-thumb:hover {
            background: var(--scrollbar-thumb-hover);
            border: 2px solid transparent;
            background-clip: padding-box;
        }
        .room-list::-webkit-scrollbar-thumb:active,
        .member-action-popover::-webkit-scrollbar-thumb:active,
        .room-settings-dialog::-webkit-scrollbar-thumb:active,
        #room-chat-messages::-webkit-scrollbar-thumb:active,
        .karaoke-results::-webkit-scrollbar-thumb:active,
        .karaoke-lyrics-list::-webkit-scrollbar-thumb:active,
        .karaoke-rank-floating-song-list::-webkit-scrollbar-thumb:active {
            background: var(--scrollbar-thumb-active);
            border: 2px solid transparent;
            background-clip: padding-box;
        }
        .room-list::-webkit-scrollbar-corner,
        .member-action-popover::-webkit-scrollbar-corner,
        .room-settings-dialog::-webkit-scrollbar-corner,
        #room-chat-messages::-webkit-scrollbar-corner,
        .karaoke-results::-webkit-scrollbar-corner,
        .karaoke-lyrics-list::-webkit-scrollbar-corner,
        .karaoke-rank-floating-song-list::-webkit-scrollbar-corner {
            background: transparent;
        }
        .lobby-toolbar {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 220px;
            gap: 16px;
            align-items: stretch;
            margin-bottom: 18px;
        }
        .search-card {
            background: linear-gradient(180deg, rgba(var(--accent-rgb), .06), var(--bg-panel));
            border: 1px solid var(--border-light);
            border-radius: var(--radius-panel);
            padding: 14px 16px;
            box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
            min-width: 0;
        }
        .search-card.search-wide {
            flex: 1 1 auto;
            min-width: 0;
        }
        .search-card.search-narrow {
            flex: 0 0 190px;
        }
        .search-card label {
            display: block;
            margin-bottom: 8px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .lobby-toolbar input,
        .lobby-toolbar select {
            width: 100%;
            height: 48px;
            border-radius: 14px;
            background: var(--input-bg);
            color: var(--text-primary);
            border: 1px solid var(--border-light);
            box-shadow: inset 0 1px 0 rgba(255,255,255,.24), 0 8px 18px rgba(15,23,42,.04);
            padding: 0 14px;
            font-size: 0.98rem;
        }
        .lobby-toolbar input::placeholder {
            color: var(--text-secondary);
            opacity: .72;
        }
        .search-card select {
            width: 100%;
            min-width: 0;
        }
        .toolbar-actions {
            display: none;
        }
        .toolbar-actions .btn {
            min-width: 124px;
            height: 48px;
            border-radius: 16px;
            padding: 0 16px;
        }
        .toolbar-actions .btn.btn-secondary {
            background: linear-gradient(180deg, var(--btn-secondary-bg), rgba(var(--accent-rgb), .05));
            border: 1px solid var(--btn-secondary-border);
        }
        body.dark .search-card {
            box-shadow: 0 14px 28px rgba(0,0,0,.18), inset 0 1px 0 rgba(255,255,255,.03);
        }
        body.dark .lobby-toolbar input,
        body.dark .lobby-toolbar select {
            box-shadow: inset 0 1px 0 rgba(255,255,255,.03), 0 10px 20px rgba(0,0,0,.16);
        }
        #load-more-rooms-btn {
            display: none;
            transition: transform .18s ease, box-shadow .18s ease, color .18s ease, border-color .18s ease, background .18s ease;
        }
        .room-list-more-row {
            display: flex;
            justify-content: center;
            margin-top: 18px;
        }
        .room-list-more-row .btn {
            min-width: 148px;
        }