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

:root {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #21262D;
    --bg-message: #2D333B;
    --bg-hover: #30363D;
    --accent-primary: #58A6FF;
    --accent-hover: #4493E1;
    --accent-secondary: #7C3AED;
    --text-primary: #F0F6FC;
    --text-secondary: #8B949E;
    --text-muted: #6E7681;
    --border-color: #30363D;
    --border-hover: #58A6FF;
    --success: #3FB950;
    --warning: #D29922;
    --error: #F85149;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0A0F1C 100%);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    line-height: 1.6;
}

.app-container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
    box-shadow: 2px 0 10px var(--shadow);
    animation: slideInFromLeft 0.5s ease-out;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.new-chat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(88, 166, 255, 0.4);
}

.quick-actions h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

/* Chat History Section */
.chat-history-section {
    margin-bottom: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.chat-history-section h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.chat-history-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.chat-history-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.chat-history-item:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.chat-history-item.active {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.15) 0%, rgba(124, 58, 237, 0.15) 100%);
    border-color: var(--accent-primary);
}

.chat-history-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(88, 166, 255, 0.1), transparent);
    transition: left 0.5s;
}

.chat-history-item:hover::before {
    left: 100%;
}

.chat-history-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--text-secondary);
}

.chat-history-item:hover .chat-history-icon {
    color: var(--accent-primary);
}

.chat-history-text {
    flex: 1;
    min-width: 0;
}

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

.chat-history-date {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

.chat-history-delete {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    opacity: 0;
    transition: all 0.2s ease;
}

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

.chat-history-delete:hover {
    background: rgba(248, 81, 73, 0.2);
    color: var(--error);
}

.empty-history {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 13px;
}

.action-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 8px;
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(88, 166, 255, 0.1), transparent);
    transition: left 0.5s;
}

.action-btn:hover::before {
    left: 100%;
}

.action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.2);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: pulse 2s infinite;
}

.status-indicator.connected .status-dot {
    background: var(--success);
    animation: none;
    box-shadow: 0 0 10px rgba(63, 185, 80, 0.5);
}

.status-indicator.error .status-dot {
    background: var(--error);
    animation: none;
    box-shadow: 0 0 10px rgba(248, 81, 73, 0.5);
}

.status-text {
    color: var(--text-secondary);
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    animation: slideInFromRight 0.5s ease-out;
}

.chat-header {
    padding: 24px 30px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    backdrop-filter: blur(10px);
}

.chat-header h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.chat-header p {
    font-size: 15px;
    color: var(--text-secondary);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
}

.welcome-message {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 20px;
    animation: fadeIn 0.8s ease-out;
}

.welcome-icon {
    margin-bottom: 20px;
}

.welcome-message h2 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.welcome-message p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 15px;
}

.welcome-message ul {
    list-style: none;
    margin: 20px 0;
}

.welcome-message li {
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.welcome-message li::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(88, 166, 255, 0.1), transparent);
    transition: left 0.5s;
}

.welcome-message li:hover::before {
    left: 100%;
}

.welcome-message li:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.2);
    border-color: var(--accent-primary);
}

.welcome-hint {
    margin-top: 30px;
    font-size: 13px;
    color: var(--text-secondary);
}

.message {
    margin-bottom: 24px;
    animation: fadeIn 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.message.assistant {
    align-items: flex-start;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    margin-bottom: 6px;
    padding: 0 4px;
}

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

.message-author {
    font-weight: 600;
    color: var(--text-secondary);
}

.message.user .message-author {
    color: var(--accent-primary);
}

.message-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 6px;
    font-size: 11px;
    border-radius: 4px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.message-action-btn:hover {
    background: var(--bg-hover);
    color: var(--accent-primary);
}

.message-content {
    max-width: 85%;
    padding: 14px 18px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.7;
    position: relative;
    backdrop-filter: blur(5px);
}

.message.user .message-content {
    background: linear-gradient(135deg, #1a4a6e 0%, #0d3a5c 100%);
    border: 1px solid rgba(88, 166, 255, 0.3);
    box-shadow: 0 2px 12px rgba(88, 166, 255, 0.15);
    border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
    background: linear-gradient(135deg, var(--bg-message) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 12px rgba(88, 166, 255, 0.1);
    border-bottom-left-radius: 4px;
}

/* Edit Message Styles */
.edit-textarea {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    resize: vertical;
    min-height: 80px;
    outline: none;
    margin-bottom: 10px;
}

.edit-textarea:focus {
    border-color: var(--accent-primary);
}

.edit-btn-container {
    display: flex;
    gap: 8px;
}

.edit-save-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.edit-save-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.edit-cancel-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.edit-cancel-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Toast Notification */
.toast-notification {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.message-content pre {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, #1a1f2e 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.6;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.message-content pre code {
    background: transparent;
    padding: 0;
    border-radius: 0;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    color: var(--text-primary);
    display: block;
}

.code-block-wrapper {
    position: relative;
    margin: 16px 0;
}

.code-block-wrapper pre {
    margin: 0;
}

.code-copy-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.3);
    color: var(--accent-primary);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.code-copy-btn:hover {
    background: rgba(88, 166, 255, 0.2);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.code-copy-btn.copied {
    background: rgba(63, 185, 80, 0.2);
    color: var(--success);
    border-color: var(--success);
}

/* Markdown styling */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
    color: var(--text-primary);
    margin-top: 20px;
    margin-bottom: 12px;
    font-weight: 600;
}

.message-content h1 {
    font-size: 24px;
}

.message-content h2 {
    font-size: 20px;
    color: var(--accent-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.message-content h3 {
    font-size: 16px;
}

.message-content h4 {
    font-size: 14px;
}

.message-content p code,
.message-content li code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    color: var(--accent-primary);
}

.message-content ul,
.message-content ol {
    margin: 12px 0;
    padding-left: 24px;
}

.message-content li {
    margin: 6px 0;
    line-height: 1.6;
}

.message-content p {
    margin: 12px 0;
}

.message-content blockquote {
    border-left: 3px solid var(--accent-primary);
    padding-left: 16px;
    margin: 12px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.message-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 12px 0;
}

.message-content th,
.message-content td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}

.message-content th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 16px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {

    0%,
    60%,
    100% {
        transform: translateY(0);
    }

    30% {
        transform: translateY(-10px);
    }
}

.chat-input-container {
    padding: 20px 30px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.model-selector-wrapper {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.model-select {
    flex: 1;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-message) 100%);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238B949E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.model-select:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.2);
}

.model-select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.model-select optgroup {
    background: var(--bg-secondary);
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 12px;
    padding: 8px;
}

.model-select option {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 8px;
    font-size: 13px;
}

.model-select option:hover {
    background: var(--bg-hover);
}

/* Mode Toggle Styles */
.mode-toggle-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    padding: 0 4px;
}

.mode-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.mode-toggle {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 4px;
    border: 1px solid var(--border-color);
}

.mode-btn {
    padding: 6px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-btn:hover {
    color: var(--text-primary);
}

.mode-btn.active {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.3);
}

.chat-input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-message) 100%);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 12px 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.chat-input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.2);
    transform: translateY(-2px);
}

#user-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    max-height: 400px;
    outline: none;
    min-height: 24px;
    overflow-y: auto;
}

#user-input::placeholder {
    color: var(--text-secondary);
}

/* Compact Input Controls */
.input-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.model-select-compact {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 6px 10px;
    color: var(--text-primary);
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238B949E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    padding-right: 24px;
    min-width: 100px;
}

.model-select-compact:hover {
    border-color: var(--accent-primary);
}

.mode-toggle-compact {
    display: flex;
    background: var(--bg-secondary);
    border-radius: 6px;
    padding: 2px;
    border: 1px solid var(--border-color);
}

.mode-btn-compact {
    padding: 5px 10px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.mode-btn-compact:hover {
    color: var(--text-primary);
}

.mode-btn-compact.active {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.send-btn {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.send-btn:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 20px rgba(88, 166, 255, 0.4);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.input-hint {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.input-hint kbd {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-family: inherit;
    font-size: 11px;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    margin: 12px 0;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--border-color) 0%, var(--accent-primary) 100%);
    border-radius: 5px;
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
}

/* Syntax highlighting */
.hljs {
    background: transparent !important;
    color: var(--text-primary) !important;
}

.hljs-keyword {
    color: #ff7b72 !important;
}

.hljs-string {
    color: #a5d6ff !important;
}

.hljs-comment {
    color: var(--text-muted) !important;
    font-style: italic;
}

.hljs-number {
    color: #79c0ff !important;
}

.hljs-class .hljs-title {
    color: #ffa657 !important;
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        z-index: 100;
        transition: left 0.3s;
    }

    .sidebar.open {
        left: 0;
    }

    .chat-header h1 {
        font-size: 20px;
    }

    .chat-messages {
        padding: 16px;
    }

    .message-content {
        margin-left: 0;
        padding: 14px 16px;
    }

    .message-header {
        margin-bottom: 6px;
    }

    .welcome-message {
        padding: 20px 16px;
    }

    .chat-input-container {
        padding: 15px;
    }
}

/* Enhanced Markdown Styling */
.message-content .section-title {
    color: var(--accent-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 1.5rem 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-primary);
    position: relative;
}

.message-content .section-subtitle {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.25rem 0 0.75rem 0;
    padding-left: 0.75rem;
    border-left: 3px solid var(--accent-primary);
    background: linear-gradient(90deg, rgba(88, 166, 255, 0.1) 0%, transparent 100%);
    padding: 0.5rem 0.75rem;
    border-radius: 0 4px 4px 0;
}

.message-content .section-heading {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    margin: 1rem 0 0.5rem 0;
    padding-left: 0.5rem;
    border-left: 2px solid var(--text-muted);
}

.message-content .enhanced-paragraph {
    margin: 0.75rem 0;
    line-height: 1.7;
    color: var(--text-primary);
}

.message-content .enhanced-list {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
}

.message-content .enhanced-list li {
    margin: 0.5rem 0;
    color: var(--text-primary);
    position: relative;
}

.message-content .enhanced-list li::marker {
    color: var(--accent-primary);
}

.message-content .inline-code {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
}

/* Table of Contents */
.response-toc {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin: 0 0 1.5rem 0;
    backdrop-filter: blur(5px);
}

.toc-title {
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    margin: 0.25rem 0;
}

.toc-level-1 {
    font-weight: 600;
}

.toc-level-2 {
    padding-left: 1rem;
    font-weight: 500;
}

.toc-level-3 {
    padding-left: 2rem;
    font-weight: 400;
    font-size: 0.9rem;
}

.toc-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    display: block;
    padding: 0.2rem 0;
}

.toc-link:hover {
    color: var(--accent-primary);
}

/* Enhanced Code Block Styling */
.code-block-wrapper {
    position: relative;
    margin: 1rem 0;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.code-block-wrapper pre {
    margin: 0;
    padding: 1.25rem;
    background: transparent;
    overflow-x: auto;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.code-block-wrapper pre code {
    background: transparent;
    padding: 0;
    border: none;
    border-radius: 0;
    font-size: inherit;
    color: var(--text-primary);
}

.code-copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s ease;
    backdrop-filter: blur(5px);
    font-family: inherit;
    z-index: 10;
}

.code-copy-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.2);
}

.code-copy-btn.copied {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.code-copy-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Syntax Highlighting Enhancements */
.hljs {
    background: transparent !important;
    color: var(--text-primary) !important;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-built_in {
    color: #FF7B72 !important;
}

.hljs-string,
.hljs-attr {
    color: #A5D6FF !important;
}

.hljs-number,
.hljs-literal {
    color: #79C0FF !important;
}

.hljs-comment {
    color: var(--text-muted) !important;
    font-style: italic;
}

.hljs-class,
.hljs-title {
    color: #FFA657 !important;
}

.hljs-variable,
.hljs-name {
    color: #FFA198 !important;
}

.hljs-tag {
    color: #7EE787 !important;
}

/* Responsive Design for Enhanced Elements */
@media (max-width: 768px) {
    .response-toc {
        padding: 0.75rem;
        margin: 0 0 1rem 0;
    }

    .toc-title {
        font-size: 0.9rem;
    }

    .message-content .section-title {
        font-size: 1.3rem;
    }

    .message-content .section-subtitle {
        font-size: 1.1rem;
    }

    .code-copy-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }

    .code-block-wrapper pre {
        padding: 1rem;
        font-size: 0.85rem;
    }
}

/* Animation for enhanced elements */
.message-content .section-title,
.message-content .section-subtitle,
.message-content .section-heading {
    animation: fadeInUp 0.5s ease-out;
}

.response-toc {
    animation: slideInFromTop 0.4s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}