/* ============================================================================
   CHAT INTERFACE - AI AGENT (SIGNATURE DESIGN REFINED & ENLARGED)
   ============================================================================ */

.agent-container {
    display: grid;
    grid-template-columns: 310px 1fr;
    gap: 1.5rem;
    height: calc(100vh - 220px);
    min-height: 720px;
}

/* ============================================================================
   CONVERSATION SIDEBAR
   ============================================================================ */

.conversation-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.conversation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border);
}

.conversation-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

#new-conversation-btn {
    height: 38px;
    padding: 0 1.15rem;
    background: linear-gradient(180deg, #0066cc 0%, #0056b3 100%);
    color: #ffffff;
    border: 1px solid #004c99;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 102, 204, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    user-select: none;
}

#new-conversation-btn:hover {
    background: linear-gradient(180deg, #0073e6 0%, #005cb8 100%);
    border-color: #004080;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 102, 204, 0.35);
}

#new-conversation-btn:active {
    background: #004c99;
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0, 102, 204, 0.2);
}

#new-conversation-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.4;
}

#conversation-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-right: 0.25rem;
}

#conversation-list::-webkit-scrollbar {
    width: 6px;
}

#conversation-list::-webkit-scrollbar-thumb {
    background: var(--slate-300);
    border-radius: 9999px;
}

.conversation-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.conversation-item:hover {
    background: var(--bg-secondary);
    border-color: var(--border-dark);
    transform: translateX(2px);
}

.conversation-item.active {
    background: var(--primary-light);
    border-color: #bae0ff;
    border-left: 3.5px solid var(--primary);
    box-shadow: 0 1px 4px rgba(0, 102, 204, 0.08);
}

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

.conversation-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-meta {
    font-size: 0.775rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-delete {
    width: 28px;
    height: 28px;
    padding: 0;
    background: transparent;
    border: 1px solid transparent;
    color: var(--slate-400);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    flex-shrink: 0;
}

.conversation-item:hover .conversation-delete {
    opacity: 1;
}

.conversation-delete:hover {
    background: var(--danger-light);
    border-color: var(--danger-border);
    color: var(--danger);
    transform: scale(1.08);
}

.no-conversations {
    padding: 3rem 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================================================
   CHAT AREA & VIEWPORT
   ============================================================================ */

.chat-area {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    height: 100%;
}

.chat-header {
    padding: 1.25rem 1.75rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-header h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.015em;
}

.chat-header p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0.25rem 0 0 0;
}

#agent-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.75rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: #fafcff;
}

#agent-messages::-webkit-scrollbar {
    width: 7px;
}

#agent-messages::-webkit-scrollbar-thumb {
    background: var(--slate-300);
    border-radius: 9999px;
}

#agent-messages::-webkit-scrollbar-thumb:hover {
    background: var(--slate-400);
}

/* ============================================================================
   CHAT INPUT AREA
   ============================================================================ */

.chat-input-area {
    padding: 1.25rem 1.75rem;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

#agent-chat-form {
    display: flex;
    gap: 0.85rem;
    align-items: flex-end;
}

#agent-message-input {
    flex: 1;
    padding: 0.85rem 1.15rem;
    border: 1.5px solid var(--border-dark);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: none;
    min-height: 48px;
    max-height: 160px;
    line-height: 1.5;
    transition: all var(--transition-fast);
}

#agent-message-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

#agent-message-input::placeholder {
    color: var(--text-tertiary);
}

#agent-send-btn {
    padding: 0 1.6rem;
    background: linear-gradient(180deg, #0066cc 0%, #004c99 100%);
    color: #ffffff;
    border: 1px solid #003d7a;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    height: 48px;
    box-shadow: 0 2px 6px rgba(0, 102, 204, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.18);
    user-select: none;
    flex-shrink: 0;
}

#agent-send-btn:hover:not(:disabled) {
    background: linear-gradient(180deg, #0073e6 0%, #0056b3 100%);
    border-color: #004080;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0, 102, 204, 0.35);
}

#agent-send-btn:active:not(:disabled) {
    background: #004c99;
    transform: translateY(1px);
    box-shadow: 0 1px 3px rgba(0, 102, 204, 0.2);
}

#agent-send-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#agent-send-btn svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.2;
}
}

/* ============================================================================
   MESSAGE BUBBLES
   ============================================================================ */

.message-wrapper {
    display: flex;
    animation: fadeIn 0.25s ease-out;
}

.message-wrapper.message-user {
    justify-content: flex-end;
}

.message {
    padding: 0.95rem 1.35rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    line-height: 1.6;
}

.message-user .message {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    border-radius: 16px 16px 4px 16px;
    max-width: 82%;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.message-user .message-content {
    color: #ffffff;
}

.message-user .message-time {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.75rem;
    margin-top: 0.35rem;
    text-align: right;
}

.message-assistant {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 96%;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--primary-glow);
    flex-shrink: 0;
    margin-top: 2px;
}

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

.message-assistant .message {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px 16px 16px 16px;
    padding: 1.25rem 1.6rem;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.message-assistant .message-time {
    color: var(--text-tertiary);
    font-size: 0.75rem;
    margin-top: 0.45rem;
}

.message-error {
    background: var(--danger-light);
    color: var(--danger-dark);
    border: 1px solid rgba(229, 72, 77, 0.25);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 85%;
}

/* ============================================================================
   MARKDOWN & DATA TABLES (HIGH-PRECISION STYLING)
   ============================================================================ */

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
    color: var(--text-primary);
    margin-top: 1.25rem;
    margin-bottom: 0.6rem;
    font-weight: 600;
    line-height: 1.35;
}

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

.message-content h1 { font-size: 1.35rem; border-bottom: 1px solid var(--border); padding-bottom: 0.35rem; }
.message-content h2 { font-size: 1.15rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.message-content h3 { font-size: 1.05rem; }
.message-content h4 { font-size: 0.95rem; }

.message-content p {
    margin: 0.6rem 0;
    line-height: 1.65;
}

.message-content p:first-child { margin-top: 0; }
.message-content p:last-child { margin-bottom: 0; }

.message-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.message-content ul,
.message-content ol {
    margin: 0.6rem 0;
    padding-left: 1.5rem;
}

.message-content li {
    margin-bottom: 0.4rem;
    line-height: 1.6;
}

/* Polished Markdown Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    margin: 1.15rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-dark);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.05);
    background: #ffffff;
}

.markdown-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.9rem;
    text-align: left;
}

.markdown-table th {
    background: #0f172a;
    color: #ffffff;
    font-weight: 600;
    padding: 0.8rem 1rem;
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    border-bottom: 2px solid var(--primary);
    white-space: nowrap;
}

.markdown-table td {
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.markdown-table tr:nth-child(even) td {
    background: #f8fafc;
}

.markdown-table tr:hover td {
    background: #eff6fc;
}

.markdown-table tr:last-child td {
    border-bottom: none;
}

/* Code Blocks */
.code-block {
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
}

.message-content code {
    padding: 0.15rem 0.4rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xs);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--primary-dark);
}

.code-block code {
    background: transparent !important;
    padding: 0 !important;
    color: inherit !important;
}

/* ============================================================================
   TOOL CALLS
   ============================================================================ */

.tool-calls {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 0.85rem;
}

.tool-call {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    padding: 0.75rem 0.95rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.tool-call-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tool-call-text strong {
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.15rem;
}

.tool-call-params {
    font-size: 0.775rem;
    color: var(--text-secondary);
}

/* ============================================================================
   TYPING INDICATOR
   ============================================================================ */

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.95rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px 16px 16px 16px;
    width: fit-content;
    box-shadow: var(--shadow-sm);
    animation: fadeIn 0.25s ease;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    animation: typingPulse 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingPulse {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1.15); }
}

/* ============================================================================
   WELCOME MESSAGE & INTERACTIVE PROMPT LIST
   ============================================================================ */

.welcome-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 2rem;
    max-width: 680px;
    margin: auto;
}

.welcome-icon,
.welcome-hero-badge {
    width: 58px;
    height: 58px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    box-shadow: 0 6px 20px var(--primary-glow);
}

.welcome-message h3 {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.015em;
}

.welcome-message p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
    line-height: 1.6;
}

/* Interactive Prompt Grid (Modern Card Layout) */
.welcome-prompt-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    width: 100%;
    max-width: 760px;
    margin-top: 0.5rem;
}

.welcome-prompt-card {
    background: #ffffff;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.15rem 1.25rem;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-xs);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.welcome-prompt-card:hover {
    border-color: var(--primary);
    background: #f8fbff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 102, 204, 0.12);
}

.prompt-card-tag {
    font-size: 0.725rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
}

.prompt-card-query {
    font-size: 0.8875rem;
    font-weight: 500;
    color: var(--slate-700);
    line-height: 1.45;
}

/* Classic List fallback */
.example-questions {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.example-questions li {
    padding: 1rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9125rem;
    color: var(--text-primary);
    text-align: left;
    transition: all var(--transition-fast);
    cursor: pointer;
    box-shadow: var(--shadow-xs);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.example-questions li:hover {
    background: #f0f7ff;
    border-color: var(--primary);
    color: var(--primary);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.example-questions li::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}