/* NOTE: MwChat component styles
   Prefix: mw-chat-*
   Loaded via Assets["mw-chat.css"] in App.razor
   Aesthetic: refined industrial — clean dark surfaces, subtle depth, precise spacing */

/* NOTE: Page-level layout */
.mw-chat-page {
    display: flex;
    height: calc(100vh - var(--mud-appbar-height));
    background: var(--mud-palette-background);
    overflow: hidden;
}

/* ═══════════════════════════════════════════════════
   NOTE: Sidebar
   ═══════════════════════════════════════════════════ */
.mw-chat-sidebar {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    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-chat-sidebar-header {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-shrink: 0;
}

.mw-chat-sidebar-search {
    position: relative;
}

.mw-chat-sidebar-search .mud-input-outlined .mud-input-outlined-border {
    border-color: color-mix(in srgb, var(--mud-palette-lines-default) 40%, transparent) !important;
    border-radius: 10px;
}

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

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

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

.mw-chat-sidebar-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px 24px;
    text-align: center;
    opacity: 0.5;
}

/* NOTE: Conversation list items */
.mw-chat-list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.15s ease;
    position: relative;
    margin-bottom: 2px;
    border: none;
}

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

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

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

.mw-chat-list-item-content {
    flex: 1;
    min-width: 0;
}

.mw-chat-list-item-title {
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

.mw-chat-list-item-preview {
    font-size: 0.75rem;
    color: var(--mud-palette-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.mw-chat-list-item-time {
    font-size: 0.65rem;
    color: var(--mud-palette-text-secondary);
    white-space: nowrap;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    font-variant-numeric: tabular-nums;
}

/* NOTE: Delete button — appears on hover */
.mw-chat-list-item-delete {
    opacity: 0;
    transition: opacity 0.15s ease;
    flex-shrink: 0;
}

.mw-chat-list-item:hover .mw-chat-list-item-delete {
    opacity: 0.6;
}

.mw-chat-list-item-delete:hover {
    opacity: 1 !important;
}

/* ═══════════════════════════════════════════════════
   NOTE: Chat area
   ═══════════════════════════════════════════════════ */
.mw-chat-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* NOTE: Root container (legacy, kept for compatibility) */
.mw-chat {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

/* NOTE: Header bar */
.mw-chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    border-bottom: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 50%, transparent);
    flex-shrink: 0;
    backdrop-filter: blur(12px);
    z-index: 1;
}

.mw-chat-header-title {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* NOTE: Scrollable message area */
.mw-chat-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 24px 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mw-chat-messages::-webkit-scrollbar {
    width: 6px;
}

.mw-chat-messages::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--mud-palette-text-secondary) 20%, transparent);
    border-radius: 3px;
}

/* NOTE: Individual bubble wrapper */
.mw-chat-bubble {
    display: flex;
    flex-direction: column;
    max-width: 72%;
    margin-bottom: 2px;
    animation: mw-chat-bubble-in 0.2s ease-out;
}

@keyframes mw-chat-bubble-in {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mw-chat-bubble--incoming {
    align-self: flex-start;
}

.mw-chat-bubble--outgoing {
    align-self: flex-end;
}

.mw-chat-bubble--system {
    align-self: center;
    max-width: 85%;
}

/* NOTE: Bubble content area */
.mw-chat-bubble-content {
    padding: 10px 14px;
    border-radius: 16px;
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.5;
    font-size: 0.9rem;
}

.mw-chat-bubble--incoming .mw-chat-bubble-content {
    background: var(--mud-palette-surface);
    border-bottom-left-radius: 4px;
}

.mw-chat-bubble--outgoing .mw-chat-bubble-content {
    background: var(--mud-palette-primary);
    color: var(--mud-palette-primary-text);
    border-bottom-right-radius: 4px;
}

.mw-chat-bubble--system .mw-chat-bubble-content {
    background: transparent;
    color: var(--mud-palette-text-secondary);
    font-style: italic;
    text-align: center;
    padding: 4px 8px;
    font-size: 0.8rem;
}

/* NOTE: Timestamp + status line */
.mw-chat-bubble-meta {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 6px 0;
    opacity: 0.6;
}

.mw-chat-bubble--incoming .mw-chat-bubble-meta {
    justify-content: flex-start;
}

.mw-chat-bubble--outgoing .mw-chat-bubble-meta {
    justify-content: flex-end;
}

/* NOTE: Sender name above bubble */
.mw-chat-bubble-sender {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--mud-palette-text-secondary);
    padding: 0 4px;
    margin-bottom: 2px;
}

/* NOTE: Reasoning/thinking toggle */
.mw-chat-reasoning {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px 2px;
    cursor: pointer;
}

.mw-chat-reasoning:hover {
    opacity: 0.8;
}

.mw-chat-reasoning-content {
    padding: 4px 14px 8px;
    border-bottom: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 30%, transparent);
    margin-bottom: 2px;
    max-height: 300px;
    overflow-y: auto;
}

/* NOTE: Failed/stale message indicator */
.mw-chat-bubble-failed {
    padding: 8px 14px;
    border-radius: 16px;
    border-bottom-left-radius: 4px;
    background: color-mix(in srgb, var(--mud-palette-error) 10%, var(--mud-palette-surface));
    border: 1px solid color-mix(in srgb, var(--mud-palette-error) 25%, transparent);
    font-size: 0.82rem;
    color: var(--mud-palette-text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* NOTE: Action proposal card */
.mw-chat-action {
    border: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 60%, transparent);
    border-radius: 14px;
    padding: 16px;
    min-width: 280px;
    background: color-mix(in srgb, var(--mud-palette-surface) 80%, transparent);
    backdrop-filter: blur(8px);
}

.mw-chat-action-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.mw-chat-action-body {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
    padding: 10px 12px;
    background: color-mix(in srgb, var(--mud-palette-background) 50%, transparent);
    border-radius: 8px;
}

.mw-chat-action-param {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: baseline;
}

.mw-chat-action-footer {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

/* NOTE: Text input area (sticky bottom) */
.mw-chat-input {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 12px 24px 16px;
    border-top: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 40%, transparent);
    flex-shrink: 0;
    background: color-mix(in srgb, var(--mud-palette-surface) 30%, transparent);
    backdrop-filter: blur(12px);
}

.mw-chat-input > *:first-child {
    flex: 1;
}

.mw-chat-input .mud-input-outlined .mud-input-outlined-border {
    border-radius: 14px;
    border-color: color-mix(in srgb, var(--mud-palette-lines-default) 40%, transparent) !important;
}

.mw-chat-input .mud-input-outlined:focus-within .mud-input-outlined-border {
    border-color: var(--mud-palette-primary) !important;
}

/* NOTE: Typing indicator (animated dots) */
.mw-chat-typing {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 10px 14px;
    background: var(--mud-palette-surface);
    border-radius: 16px;
    border-bottom-left-radius: 4px;
}

.mw-chat-typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--mud-palette-text-secondary);
    animation: mw-chat-typing-bounce 1.4s ease-in-out infinite;
}

.mw-chat-typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.mw-chat-typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes mw-chat-typing-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.3;
    }
    30% {
        transform: translateY(-5px);
        opacity: 0.8;
    }
}

/* NOTE: Empty state — no conversation selected */
.mw-chat-empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0.4;
    user-select: none;
}

.mw-chat-empty-icon {
    font-size: 64px;
    opacity: 0.3;
    animation: mw-chat-empty-float 4s ease-in-out infinite;
}

@keyframes mw-chat-empty-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* NOTE: Date separator line */
.mw-chat-date-sep {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 16px 0 8px;
    color: var(--mud-palette-text-secondary);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.mw-chat-date-sep::before,
.mw-chat-date-sep::after {
    content: "";
    flex: 1;
    height: 1px;
    background: color-mix(in srgb, var(--mud-palette-lines-default) 40%, transparent);
}

/* NOTE: Unread count badge */
.mw-chat-unread-badge {
    background: var(--mud-palette-primary);
    color: var(--mud-palette-primary-text);
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
}

/* NOTE: Responsive */
@media (max-width: 768px) {
    .mw-chat-sidebar {
        width: 260px;
    }
    .mw-chat-bubble {
        max-width: 85%;
    }
}

@media (max-width: 600px) {
    .mw-chat-sidebar {
        display: none;
    }
}