* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #1a1a1a;
    color: #ffffff;
    height: 100vh;
    overflow: hidden;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    background: #2d2d2d;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.chat-header {
    background: #1e1e1e;
    padding: 15px 20px;
    border-bottom: 1px solid #444;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.chat-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
}

.header-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tabs {
    display: flex;
    gap: 6px;
}

.tab {
    background: #333;
    color: #eee;
    border: 1px solid #444;
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 13px;
}

.tab.active {
    background: #007acc;
    border-color: #007acc;
    color: #fff;
}

.user-selector {
    padding: 8px 12px;
    border: 1px solid #555;
    border-radius: 6px;
    background: #333;
    color: #fff;
    font-size: 14px;
    min-width: 150px;
}

.search-input {
    padding: 8px 12px;
    border: 1px solid #555;
    border-radius: 6px;
    background: #333;
    color: #fff;
    font-size: 14px;
    width: 200px;
}

.refresh-btn {
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    background: #007acc;
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}

.refresh-btn:hover {
    background: #005a9e;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sessions-panel {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sessions-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

/* Session List Styling */
.sessions-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 10px;
    max-width: 800px;
    margin: 0 auto;
}

.session-card {
    background: #2d2d2d;
    border: 1px solid #444;
    border-radius: 8px;
    padding: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.session-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border-color: #555;
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.session-user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.session-avatar {
    font-size: 24px;
    background: #3a3a3a;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.session-identity {
    display: flex;
    flex-direction: column;
}

.session-name {
    font-weight: 600;
    font-size: 15px;
    color: #fff;
}

.user-id-sub {
    font-size: 11px;
    color: #888;
    font-family: monospace;
}

.session-meta {
    text-align: right;
}

.session-time {
    font-size: 12px;
    color: #aaa;
    background: #252525;
    padding: 4px 8px;
    border-radius: 12px;
}

.session-body {
    background: #222;
    padding: 10px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
    border-left: 3px solid #007acc;
}

.session-preview {
    font-size: 13px;
    color: #ccc;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.session-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn {
    padding: 6px 10px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}

.btn-primary {
    background: #10b981;
    color: #fff;
}

.btn-secondary {
    background: #555;
    color: #fff;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #2d2d2d;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #666;
}

.message {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    animation: fadeIn 0.3s ease-in;
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #007acc;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: #28a745;
}

.message-content {
    max-width: 70%;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message.user .message-content {
    align-items: flex-end;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: #aaa;
}

.message.user .message-header {
    flex-direction: row-reverse;
}

.message-user {
    font-weight: 600;
    color: #007acc;
}

.message.user .message-user {
    color: #28a745;
}

.message-time {
    font-size: 11px;
    color: #888;
}

.message-bubble {
    background: #3d3d3d;
    padding: 12px 16px;
    border-radius: 18px;
    border-top-left-radius: 4px;
    word-wrap: break-word;
    line-height: 1.4;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.message.user .message-bubble {
    background: #007acc;
    color: white;
    border-bottom-right-radius: 4px;
}

.message-type {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    margin-right: 6px;
}

.message-type.info {
    background: #17a2b8;
    color: white;
}

.message-type.error {
    background: #dc3545;
    color: white;
}

.message-type.warning {
    background: #ffc107;
    color: #212529;
}

.message-type.debug {
    background: #6c757d;
    color: white;
}

.message-type.user_message {
    background: #28a745;
    color: white;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #888;
    font-size: 14px;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #888;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: #ccc;
}

.status-bar {
    background: #1e1e1e;
    padding: 10px 20px;
    border-top: 1px solid #444;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    flex-shrink: 0;
}

.status-indicator {
    font-size: 14px;
}

.status-indicator.connected {
    color: #28a745;
}

.status-indicator.disconnected {
    color: #dc3545;
}

.message-count {
    color: #ccc;
}

.last-update {
    color: #888;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .chat-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .header-controls {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .search-input {
        width: 150px;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .status-bar {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .chat-messages {
        padding: 15px 10px;
    }
    
    .message {
        gap: 8px;
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .message-content {
        max-width: 90%;
    }
    
    .message-bubble {
        padding: 8px 12px;
        font-size: 14px;
    }
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.spinner {
    display: inline-block;
    animation: spin 1s linear infinite;
}