/* DM 管理（読取のみ・DM-053） */
.dm-management-page .dm-mgmt-layout-wrap {
    margin-top: 0.5rem;
}

.dm-mgmt-card-body {
    padding-top: 0.75rem;
}

.dm-mgmt-status-message {
    margin: 0 0 0.75rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.dm-mgmt-interactive-region[aria-busy='true'] {
    opacity: 0.72;
    pointer-events: none;
}

.dm-mgmt-panels {
    display: flex;
    gap: 1rem;
    min-height: 0;
    align-items: stretch;
}

.dm-mgmt-thread-panel {
    flex: 0 0 280px;
    max-width: 36%;
    min-height: 0;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-light);
    overflow: hidden;
}

.dm-mgmt-message-panel {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-color);
    overflow: hidden;
}

.dm-mgmt-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.65rem 0.85rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-light);
}

.dm-mgmt-panel-title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
}

.dm-mgmt-thread-list {
    list-style: none;
    margin: 0;
    padding: 0;
    overflow-y: auto;
    flex: 1 1 auto;
}

.dm-mgmt-thread-item {
    display: block;
    width: 100%;
    margin: 0;
    padding: 0.75rem 0.85rem;
    border: none;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
    text-align: left;
    cursor: pointer;
    color: var(--text-color);
}

.dm-mgmt-thread-item:hover {
    background: #f0f5ff;
}

.dm-mgmt-thread-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

.dm-mgmt-thread-item.is-selected {
    background: rgba(71, 120, 223, 0.12);
}

.dm-mgmt-thread-item__row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
}

.dm-mgmt-thread-item__preview {
    margin: 0.35rem 0 0;
    font-size: 0.875rem;
    color: var(--text-light);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dm-mgmt-thread-item__time {
    flex-shrink: 0;
    font-size: 0.75rem;
    color: var(--text-light);
}

.dm-mgmt-thread-item__badge {
    display: inline-block;
    margin-top: 0.35rem;
    padding: 0.1rem 0.45rem;
    border-radius: 6px;
    font-size: 0.7rem;
    background: var(--bg-light);
    color: var(--text-light);
    border: 1px solid var(--border-color);
}

.dm-mgmt-message-timeline {
    flex: 1 1 auto;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: scroll;
    scrollbar-gutter: stable;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.dm-mgmt-message {
    max-width: 85%;
    padding: 0.55rem 0.75rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    line-height: 1.5;
}

.dm-mgmt-message--inbound {
    align-self: flex-start;
    background: var(--bg-light);
}

.dm-mgmt-message--outbound {
    align-self: flex-end;
    background: #f0f5ff;
    border-color: rgba(71, 120, 223, 0.45);
}

.dm-mgmt-message__meta {
    margin: 0 0 0.35rem;
    font-size: 0.72rem;
    color: var(--text-light);
}

.dm-mgmt-message__text {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
}

.dm-mgmt-message__attachments {
    margin-top: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}