/* NOTE: Messages page styles (conversation sidebar + chat pane)
   Prefix: mw-msg-*
   Loaded via Assets["mw-msg.css"] in App.razor
   Chat-pane internals (bubbles, composer) live in mw-chat.css (mw-chat-*). */

/* NOTE: Page shell — sidebar + chat pane */
.mw-msg-page {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: calc(100vh - var(--mud-appbar-height));
    background: var(--mud-palette-background);
    overflow: hidden;
}

/* ═══════════════════════════════════════════════════
   NOTE: Sidebar
   ═══════════════════════════════════════════════════ */
.mw-msg-sidebar {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: color-mix(in srgb, var(--mud-palette-surface) 60%, transparent);
    border-right: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 50%, transparent);
}

.mw-msg-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 6px;
    flex-shrink: 0;
}

.mw-msg-sidebar-search {
    padding: 4px 12px 8px;
    flex-shrink: 0;
}

.mw-msg-sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 8px 16px;
}

.mw-msg-sidebar-list::-webkit-scrollbar {
    width: 4px;
}

.mw-msg-sidebar-list::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--mud-palette-text-secondary) 30%, transparent);
    border-radius: 2px;
}

.mw-msg-section-label {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--mud-palette-text-secondary);
    padding: 12px 8px 4px;
}

/* NOTE: Conversation list items */
.mw-msg-conv {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    cursor: pointer;
    border-radius: 10px;
    transition: background 0.15s ease;
    margin-bottom: 2px;
}

.mw-msg-conv:hover {
    background: color-mix(in srgb, var(--mud-palette-action-default-hover) 80%, transparent);
}

.mw-msg-conv--active {
    background: color-mix(in srgb, var(--mud-palette-primary) 15%, transparent);
    box-shadow: inset 3px 0 0 var(--mud-palette-primary);
}

.mw-msg-conv--active:hover {
    background: color-mix(in srgb, var(--mud-palette-primary) 20%, transparent);
}

.mw-msg-conv-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.mw-msg-conv-name {
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

.mw-msg-conv-sub {
    font-size: 0.72rem;
    color: var(--mud-palette-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mw-msg-conv-end {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    flex-shrink: 0;
}

.mw-msg-conv-time {
    font-size: 0.65rem;
    color: var(--mud-palette-text-secondary);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

/* NOTE: Unread dot on a conversation row (per-conversation watermark, no message counting) */
.mw-msg-unread-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--mud-palette-primary);
    flex-shrink: 0;
}

.mw-msg-avatar--group {
    border-radius: 30%;
}

/* ═══════════════════════════════════════════════════
   NOTE: Chat pane
   ═══════════════════════════════════════════════════ */
.mw-msg-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
}

.mw-msg-chat-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-bottom: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 50%, transparent);
    flex-shrink: 0;
}

.mw-msg-chat-header-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* NOTE: Back button — mobile list-first navigation only */
.mw-msg-back {
    display: none !important;
}

/* NOTE: Friend picker rows in the create-group dialog */
.mw-msg-friendpick {
    display: flex;
    flex-direction: column;
    max-height: 280px;
    overflow-y: auto;
}

.mw-msg-friendpick-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 6px;
    border-radius: 8px;
    cursor: pointer;
}

.mw-msg-friendpick-row:hover {
    background: color-mix(in srgb, var(--mud-palette-action-default-hover) 80%, transparent);
}

.mw-msg-friendpick-name {
    font-size: 0.875rem;
}

/* ═══════════════════════════════════════════════════
   NOTE: Mobile — list-first navigation (list ⇄ conversation)
   ═══════════════════════════════════════════════════ */
@media (max-width: 700px) {
    .mw-msg-page {
        grid-template-columns: 1fr;
    }

    /* NOTE: No conversation selected → list only */
    .mw-msg-page:not(.mw-msg-page--open) .mw-msg-main {
        display: none;
    }

    /* NOTE: Conversation open → chat only, back button visible */
    .mw-msg-page--open .mw-msg-sidebar {
        display: none;
    }

    .mw-msg-page--open .mw-msg-back {
        display: inline-flex !important;
    }
}