/* ==========================================================================
   Chat Panel — Neumorphic Messaging
   ========================================================================== */

.chat-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    height: 100vh;
    background: var(--color-bg-primary);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.12);
    z-index: var(--z-panel);
    transform: translateX(100%);
    transition: transform var(--transition-panel);
    display: flex;
    flex-direction: column;
}

.chat-panel.is-open {
    transform: translateX(0);
}

.chat-panel__backdrop {
    display: none;
}

/* ─── Header ─────────────────────────────────────────── */

.chat-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    min-height: 56px;
    flex-shrink: 0;
}

.chat-panel__header-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.chat-panel__back-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.chat-panel__back-btn:hover {
    color: var(--color-text-primary);
    box-shadow: var(--neu-inset-sm);
}

.chat-panel--chat-view .chat-panel__back-btn {
    display: flex;
}

.chat-panel__title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
}

.chat-panel__close-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.chat-panel__close-btn:hover {
    color: var(--color-text-primary);
    box-shadow: var(--neu-inset-sm);
}

/* ─── List View ──────────────────────────────────────── */

.chat-panel__search {
    padding: var(--space-3) var(--space-5);
    flex-shrink: 0;
    position: relative;
}

.chat-panel__search-input {
    width: 100%;
    padding: var(--space-2) var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-bg-primary);
    box-shadow: var(--neu-inset);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    outline: none;
    transition: box-shadow var(--transition-fast);
}

.chat-panel__search-input::placeholder {
    color: var(--color-text-tertiary);
}

.chat-panel__search-input:focus {
    box-shadow: var(--neu-inset), var(--shadow-focus);
}

.chat-panel__search-results {
    position: absolute;
    top: 100%;
    left: var(--space-5);
    right: var(--space-5);
    background: var(--color-bg-primary);
    box-shadow: var(--neu-raised);
    border-radius: var(--radius-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    display: none;
}

.chat-panel__search-results.is-visible {
    display: block;
}

.chat-panel__search-item {
    padding: var(--space-3) var(--space-4);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: background var(--transition-fast);
}

.chat-panel__search-item:hover {
    background: var(--color-bg-secondary);
}

.chat-panel__search-item-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-primary);
}

.chat-panel__search-item-role {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

/* ─── Bot entry ──────────────────────────────────────── */

.chat-panel__bot-entry {
    margin: var(--space-2) var(--space-5);
    padding: var(--space-3) var(--space-4);
    background: linear-gradient(135deg, var(--color-accent), #6366f1);
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: all var(--transition-base);
    box-shadow: var(--neu-raised-sm);
}

.chat-panel__bot-entry:hover {
    box-shadow: var(--neu-raised);
    transform: translateY(-1px);
}

.chat-panel__bot-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.chat-panel__bot-info {
    flex: 1;
    min-width: 0;
}

.chat-panel__bot-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: #fff;
}

.chat-panel__bot-desc {
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.8);
}

/* ─── Conversation list ──────────────────────────────── */

.chat-panel__list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-2) 0;
}

.chat-panel__conv-item {
    padding: var(--space-3) var(--space-5);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: background var(--transition-fast);
}

.chat-panel__conv-item:hover {
    background: var(--color-bg-secondary);
}

.chat-panel__conv-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    box-shadow: var(--neu-raised-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--color-text-secondary);
}

.chat-panel__conv-body {
    flex: 1;
    min-width: 0;
}

.chat-panel__conv-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-panel__conv-time {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    font-weight: var(--weight-regular);
    flex-shrink: 0;
    margin-left: var(--space-2);
}

.chat-panel__conv-preview {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.chat-panel__conv-badge {
    min-width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    color: #fff;
    font-size: 11px;
    font-weight: var(--weight-semibold);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0 6px;
}

.chat-panel__empty {
    text-align: center;
    padding: var(--space-10) var(--space-5);
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

/* ─── Chat View ──────────────────────────────────────── */

.chat-panel__list-view,
.chat-panel__chat-view {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.chat-panel__chat-view {
    display: none;
}

.chat-panel--chat-view .chat-panel__list-view {
    display: none;
}

.chat-panel--chat-view .chat-panel__chat-view {
    display: flex;
}

.chat-panel__messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* ─── Message Bubbles ────────────────────────────────── */

.chat-bubble {
    max-width: 80%;
    display: flex;
    gap: var(--space-2);
    align-items: flex-end;
}

.chat-bubble--sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

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

.chat-bubble__avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    box-shadow: var(--neu-raised-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.chat-bubble--sent .chat-bubble__avatar {
    display: none;
}

.chat-bubble__content {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    word-wrap: break-word;
    white-space: pre-wrap;
}

.chat-bubble--sent .chat-bubble__content {
    background: linear-gradient(135deg, var(--color-accent), #6366f1);
    color: #fff;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble--received .chat-bubble__content {
    background: var(--color-bg-secondary);
    box-shadow: var(--neu-raised-sm);
    color: var(--color-text-primary);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-bubble__time {
    font-size: 10px;
    color: var(--color-text-tertiary);
    margin-top: 2px;
    padding: 0 var(--space-1);
}

.chat-bubble--sent .chat-bubble__time {
    text-align: right;
}

/* ─── Typing indicator ───────────────────────────────── */

.chat-typing {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) 0;
    display: none;
}

.chat-typing.is-visible {
    display: flex;
}

.chat-typing__avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent), #6366f1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.chat-typing__dots {
    display: flex;
    gap: 4px;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    box-shadow: var(--neu-raised-sm);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-typing__dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--color-text-tertiary);
    animation: chatTypingBounce 1.4s infinite ease-in-out both;
}

.chat-typing__dot:nth-child(1) { animation-delay: 0s; }
.chat-typing__dot:nth-child(2) { animation-delay: 0.16s; }
.chat-typing__dot:nth-child(3) { animation-delay: 0.32s; }

@keyframes chatTypingBounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* ─── Input Area ─────────────────────────────────────── */

.chat-panel__input-area {
    padding: var(--space-3) var(--space-5) var(--space-4);
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: flex-end;
    gap: var(--space-2);
    flex-shrink: 0;
}

.chat-panel__textarea {
    flex: 1;
    resize: none;
    border: none;
    background: var(--color-bg-primary);
    box-shadow: var(--neu-inset);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-family);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    outline: none;
    min-height: 40px;
    max-height: 120px;
    line-height: var(--leading-normal);
    transition: box-shadow var(--transition-fast);
}

.chat-panel__textarea::placeholder {
    color: var(--color-text-tertiary);
}

.chat-panel__textarea:focus {
    box-shadow: var(--neu-inset), var(--shadow-focus);
}

.chat-panel__send-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: none;
    background: linear-gradient(135deg, var(--color-accent), #6366f1);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--neu-raised-sm);
    transition: all var(--transition-base);
}

.chat-panel__send-btn:hover {
    box-shadow: var(--neu-raised);
    transform: translateY(-1px);
}

.chat-panel__send-btn:active {
    box-shadow: var(--neu-pressed);
    transform: translateY(0);
}

.chat-panel__send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ─── Mobile ─────────────────────────────────────────── */

@media (max-width: 640px) {
    .chat-panel {
        width: 100%;
        height: 100%;
        border-radius: 0;
    }

    .chat-panel__backdrop {
        display: none;
    }
}