/* Worldview Agent Chat Styles */

/* Layout: sidebar + chat container */
.chat-layout {
    display: flex;
    height: calc(100vh - 100px);  /* viewport - app bar (52px) - main-content padding (48px) */
}

/* Conversation sidebar */
.chat-sidebar {
    width: 260px;
    min-width: 260px;
    border-right: 1px solid var(--color-border-primary, #e2e8f0);
    display: flex;
    flex-direction: column;
    background: var(--color-bg-tertiary, #f8fafc);
    transition: width 0.2s ease, min-width 0.2s ease, opacity 0.2s ease;
    overflow: hidden;
}

.chat-sidebar.collapsed {
    width: 0;
    min-width: 0;
    border-right: none;
    opacity: 0;
    pointer-events: none;
}

.chat-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 14px 10px;
    border-bottom: 1px solid var(--color-border-primary, #e2e8f0);
}

.chat-sidebar-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary, #64748b);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chat-new-btn {
    background: none;
    border: 1px solid var(--color-border-primary, #e2e8f0);
    border-radius: 6px;
    padding: 4px 8px;
    cursor: pointer;
    color: var(--color-text-secondary, #64748b);
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    transition: all 0.15s ease;
}

.chat-new-btn:hover {
    background: var(--color-bg-hover, #f1f5f9);
    color: var(--color-text-primary, #1a202c);
    border-color: var(--color-accent, #3b82f6);
}

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

.chat-conv-empty {
    text-align: center;
    color: var(--color-text-muted, #94a3b8);
    font-size: 13px;
    padding: 20px 12px;
}

.chat-conv-item {
    display: flex;
    align-items: center;
    border-radius: 8px;
    margin-bottom: 2px;
    transition: background 0.1s ease;
    cursor: pointer;
}

.chat-conv-item:hover {
    background: var(--color-bg-hover, #f1f5f9);
}

.chat-conv-item.active {
    background: var(--color-bg-active, #e8f0fe);
    border-left: 3px solid var(--color-accent, #3b82f6);
}

.chat-conv-item-content {
    flex: 1;
    min-width: 0;
    padding: 8px 8px 8px 10px;
}

.chat-conv-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-primary, #1a202c);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-conv-meta {
    font-size: 11px;
    color: var(--color-text-muted, #94a3b8);
    margin-top: 2px;
}

.chat-conv-delete {
    background: none;
    border: none;
    padding: 4px 8px;
    cursor: pointer;
    color: var(--color-text-muted, #94a3b8);
    opacity: 0;
    transition: opacity 0.15s ease, color 0.15s ease;
    flex-shrink: 0;
}

.chat-conv-item:hover .chat-conv-delete {
    opacity: 1;
}

.chat-conv-delete:hover {
    color: #ef4444;
}

/* Chat container */
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    max-width: 900px;
    padding: 0 16px;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0 12px;
    border-bottom: 1px solid var(--color-border-primary, #e2e8f0);
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-sidebar-toggle {
    background: none;
    border: none;
    padding: 4px;
    cursor: pointer;
    color: var(--color-text-secondary, #64748b);
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: background 0.15s ease;
}

.chat-sidebar-toggle:hover {
    background: var(--color-bg-hover, #f1f5f9);
    color: var(--color-text-primary, #1a202c);
}

.chat-header h2 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    color: var(--color-text-primary, #1a202c);
}

.chat-clear-btn {
    background: none;
    border: 1px solid var(--color-border-primary, #e2e8f0);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 13px;
    color: var(--color-text-secondary, #64748b);
    cursor: pointer;
    transition: all 0.15s ease;
}

.chat-clear-btn:hover {
    background: var(--color-bg-hover, #f1f5f9);
    color: var(--color-text-primary, #1a202c);
}

/* Messages area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-messages:empty::before {
    content: '';
    display: block;
}

.chat-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-text-secondary, #64748b);
    text-align: center;
    padding: 40px;
}

.chat-empty-state h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--color-text-primary, #1a202c);
}

.chat-empty-state p {
    font-size: 14px;
    margin: 0 0 20px;
    max-width: 400px;
    line-height: 1.5;
}

.chat-suggestions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    max-width: 500px;
}

.chat-suggestion {
    background: var(--color-bg-secondary, #f8fafc);
    border: 1px solid var(--color-border-primary, #e2e8f0);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--color-text-primary, #1a202c);
    cursor: pointer;
    text-align: left;
    transition: all 0.15s ease;
}

.chat-suggestion:hover {
    background: var(--color-bg-hover, #f1f5f9);
    border-color: var(--color-accent, #3b82f6);
}

/* Message bubbles */
.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
}

.chat-message.user {
    align-self: flex-end;
}

.chat-message.assistant {
    align-self: flex-start;
}

.chat-message-content {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
}

.chat-message.user .chat-message-content {
    background: var(--color-accent, #3b82f6);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.chat-message.assistant .chat-message-content {
    background: var(--color-bg-secondary, #f8fafc);
    border: 1px solid var(--color-border-primary, #e2e8f0);
    color: var(--color-text-primary, #1a202c);
    border-bottom-left-radius: 4px;
}

/* Markdown styling within assistant messages */
.chat-message.assistant .chat-message-content h1,
.chat-message.assistant .chat-message-content h2,
.chat-message.assistant .chat-message-content h3 {
    font-size: 14px;
    font-weight: 700;
    margin: 12px 0 4px;
}

.chat-message.assistant .chat-message-content h1:first-child,
.chat-message.assistant .chat-message-content h2:first-child,
.chat-message.assistant .chat-message-content h3:first-child {
    margin-top: 0;
}

.chat-message.assistant .chat-message-content p {
    margin: 6px 0;
}

.chat-message.assistant .chat-message-content ul,
.chat-message.assistant .chat-message-content ol {
    margin: 6px 0;
    padding-left: 24px;
}

.chat-message.assistant .chat-message-content li {
    margin: 3px 0;
}

/* Nested sub-bullet lists get extra indentation */
.chat-message.assistant .chat-message-content ul.nested-list {
    padding-left: 28px;
    margin: 2px 0;
}

.chat-message.assistant .chat-message-content strong {
    font-weight: 600;
}

.chat-message.assistant .chat-message-content code {
    background: var(--color-bg-hover, #f1f5f9);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 13px;
}

/* Tools used indicator */
.chat-message-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    font-size: 11px;
    color: var(--color-text-secondary, #64748b);
    flex-wrap: wrap;
}

.chat-tool-tag {
    background: var(--color-bg-hover, #f1f5f9);
    border: 1px solid var(--color-border-primary, #e2e8f0);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 11px;
    color: var(--color-text-secondary, #64748b);
}

/* Loading indicator */
.chat-loading {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--color-bg-secondary, #f8fafc);
    border: 1px solid var(--color-border-primary, #e2e8f0);
    border-radius: 12px;
    border-bottom-left-radius: 4px;
    font-size: 13px;
    color: var(--color-text-secondary, #64748b);
    align-self: flex-start;
    max-width: 85%;
}

.chat-loading-dots {
    display: flex;
    gap: 4px;
}

.chat-loading-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-text-secondary, #64748b);
    animation: chatDotPulse 1.4s ease-in-out infinite;
}

.chat-loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.chat-loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes chatDotPulse {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* Input area */
.chat-input-area {
    padding: 12px 0;
    border-top: 1px solid var(--color-border-primary, #e2e8f0);
}

.chat-input-wrapper {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--color-border-primary, #e2e8f0);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    resize: none;
    min-height: 42px;
    max-height: 120px;
    line-height: 1.5;
    background: var(--color-bg-secondary, #fff);
    color: var(--color-text-primary, #1a202c);
    outline: none;
    transition: border-color 0.15s ease;
}

.chat-input:focus {
    border-color: var(--color-accent, #3b82f6);
}

.chat-input::placeholder {
    color: var(--color-text-muted, #94a3b8);
}

.chat-send-btn {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 10px;
    background: var(--color-accent, #3b82f6);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease;
    flex-shrink: 0;
}

.chat-send-btn:hover:not(:disabled) {
    background: #2563eb;
}

.chat-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-send-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Responsive: collapse sidebar on narrow screens */
@media (max-width: 768px) {
    .chat-sidebar {
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        z-index: 10;
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    }

    .chat-sidebar.collapsed {
        width: 0;
        min-width: 0;
    }
}