.ymx-sidebar-tabs {
    background: var(--ymx-bg-card);
    border-radius: 8px;
    box-shadow: var(--ymx-shadow-card);
    margin-bottom: 20px;
    overflow: hidden;
}

.ymx-sidebar-tabs .tabs-header {
    display: flex;
    background: var(--ymx-bg-elevated);
    border-bottom: 1px solid var(--ymx-border-color);
}

.ymx-sidebar-tabs .tab-btn {
    flex: 1;
    padding: 12px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    color: var(--ymx-text-secondary);
    transition: all 0.3s ease;
    font-weight: 500;
}

.ymx-sidebar-tabs .tab-btn:hover {
    background: rgba(0, 123, 255, 0.05);
    color: var(--ymx-accent);
}

.ymx-sidebar-tabs .tab-btn.active {
    color: var(--ymx-accent);
    border-bottom-color: var(--ymx-accent);
    background: rgba(0, 123, 255, 0.05);
}

.ymx-sidebar-tabs .tabs-content {
    padding: 20px;
    width: 360px;
    height: 173px;
    overflow: hidden;
    position: relative;
}

.ymx-sidebar-tabs .tab-panel {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(15px);
    transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s ease;
}

.ymx-sidebar-tabs .tab-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.announcement-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.announcement-item {
    padding: 8px;
    background: var(--ymx-bg-elevated);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.announcement-item:hover {
    background: #e9ecef;
    transform: translateX(3px);
}

.announcement-item a {
    color: var(--ymx-text-primary);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.4;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    transition: color 0.3s ease;
}

.announcement-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.announcement-date {
    color: var(--ymx-text-muted);
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
}

.announcement-item a:hover {
    color: var(--ymx-accent);
}

.tab-empty {
    text-align: center;
    padding: 30px 0;
    color: var(--ymx-text-muted);
    font-size: 14px;
}

.member-center-logged-in {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.member-info-top {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.member-avatar {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
}

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

.member-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.member-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--ymx-text-primary);
}

.member-email {
    font-size: 12px;
    color: var(--ymx-text-muted);
}

.member-actions {
    display: flex;
    flex-wrap: wrap;
    padding-left: 60px;
}

.member-action-btn {
    width: 80px;
    padding-bottom: 8px;
    background: transparent;
    border: none;
    color: var(--ymx-text-primary);
    text-decoration: none;
    text-align: left;
    font-size: 14px;
    transition: all 0.3s ease;
    display: block;
    white-space: normal;
    word-wrap: break-word;
    line-height: 1.2;
}

.member-action-btn:hover {
    color: var(--ymx-accent);
    padding-left: 5px;
}

.member-center-not-logged-in {
    display: flex;
    flex-direction: column;
    text-align: center;
}

.member-prompt {
    padding: 30px 0;
    color: var(--ymx-text-secondary);
    font-size: 14px;
}

.member-auth-actions {
    display: flex;
    gap: 10px;
}

.member-auth-btn {
    flex: 1;
    padding: 12px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
}

.login-btn {
    background: var(--ymx-accent);
    color: #fff;
    border: 1px solid var(--ymx-accent);
}

.login-btn:hover {
    background: var(--ymx-accent-hover);
    border-color: var(--ymx-accent-hover);
}

.register-btn {
    background: var(--ymx-bg-card);
    color: var(--ymx-accent);
    border: 1px solid var(--ymx-accent);
}

.register-btn:hover {
    background: var(--ymx-accent);
    color: #fff;
}

body.ymx-dark-mode .tab-btn {
    color: #bbb;
}

body.ymx-dark-mode .tab-btn:hover {
    background: rgba(74, 158, 255, 0.1);
}

body.ymx-dark-mode .tab-btn.active {
    background: rgba(74, 158, 255, 0.1);
}

body.ymx-dark-mode .member-action-btn {
    background: transparent;
    border-color: transparent;
}

body.ymx-dark-mode .member-action-btn:hover {
    background: transparent;
    border-color: transparent;
    padding-left: 5px;
}

body.ymx-dark-mode .member-prompt {
    color: #bbb;
}

body.ymx-dark-mode .register-btn:hover {
    color: #fff;
}

@media (max-width: 768px) {
    .ymx-sidebar-tabs {
        margin-bottom: 15px;
    }

    .ymx-sidebar-tabs .tabs-content {
        padding: 12px;
    }

    .member-actions {
        gap: 6px;
    }

    .member-action-btn {
        padding: 8px 12px;
        font-size: 13px;
    }
}