/* Modern CSS Variables */
:root {
    /* Primary Colors */
    --primary-color: #6366f1;
    --primary-hover: #5b5bf6;
    --primary-light: #e0e7ff;
    --primary-dark: #4338ca;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --sidebar-bg: #1e293b;
    --sidebar-header-bg: #0f172a;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;
    --sidebar-text: #e2e8f0;
    
    /* Message Colors */
    --user-message-bg: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --agent-message-bg: #ffffff;
    --message-border: #e2e8f0;
    
    /* Interactive States */
    --hover-bg: #f1f5f9;
    --active-bg: #e2e8f0;
    --focus-ring: 0 0 0 3px rgba(99, 102, 241, 0.1);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: var(--font-size-base);
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    display: flex;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-xl);
    margin: var(--space-md);
    max-width: calc(100vw - 2rem);
    max-height: calc(100vh - 2rem);
    overflow: hidden;
}

/* Sidebar Styles */
.sidebar {
    width: 320px;
    background: linear-gradient(180deg, var(--sidebar-header-bg) 0%, var(--sidebar-bg) 100%);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.sidebar.collapsed {
    width: 0;
    overflow: hidden;
}

.sidebar-header {
    padding: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--sidebar-header-bg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.sidebar-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-xl);
    right: var(--space-xl);
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.sidebar-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-white);
    letter-spacing: -0.025em;
}

.icon-button {
    background: none;
    border: none;
    color: var(--sidebar-text);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
}

.icon-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    transform: scale(1.05);
}

.icon-button:active {
    transform: scale(0.95);
}

/* Conversation List */
.conversation-list {
    list-style: none;
    padding: var(--space-sm);
    margin: 0;
    overflow-y: auto;
    flex-grow: 1;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

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

.conversation-list::-webkit-scrollbar-track {
    background: transparent;
}

.conversation-list::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.conversation-list::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.conversation-group-header {
    padding: var(--space-md) var(--space-sm) var(--space-xs);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.conversation-item {
    margin-bottom: var(--space-xs);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.conversation-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.conversation-item-content {
    padding: var(--space-md);
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.conversation-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.conversation-item.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-white);
    box-shadow: var(--shadow-lg);
}

.conversation-item.active::before {
    opacity: 0;
}

.conversation-title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--space-xs);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversation-preview {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    opacity: 0.8;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversation-item.active .conversation-preview {
    color: rgba(255, 255, 255, 0.8);
}

/* Chat Area */
.chat-area {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    position: relative;
}

.chat-header {
    display: flex;
    align-items: center;
    padding: var(--space-xl);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-bottom: 1px solid var(--message-border);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.chat-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-xl);
    right: var(--space-xl);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--message-border), transparent);
}

.chat-header h1 {
    margin: 0;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-left: var(--space-lg);
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.agent-id-display {
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid var(--message-border);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    min-width: 140px;
    text-align: center;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

/* Button Styles */
.button {
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
}

.button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-normal);
}

.button:hover::before {
    left: 100%;
}

.primary-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.primary-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.primary-button:active {
    transform: translateY(0);
}

.secondary-button {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--message-border);
    box-shadow: var(--shadow-sm);
}

.secondary-button:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Chat Messages */
.chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: var(--space-2xl);
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    scrollbar-width: thin;
    scrollbar-color: var(--message-border) transparent;
}

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

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background-color: var(--message-border);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-secondary);
}

.message {
    margin-bottom: var(--space-xl);
    display: flex;
    max-width: 80%;
    animation: messageSlideIn 0.3s ease-out;
    position: relative;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message .content {
    background: var(--agent-message-bg);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--message-border);
    position: relative;
    max-width: 100%;
    word-wrap: break-word;
    transition: all var(--transition-fast);
}

.message:hover .content {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.message.user .content {
    background: var(--user-message-bg);
    color: var(--text-white);
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-xl);
}

.message.user .content::before {
    content: '';
    position: absolute;
    top: 50%;
    right: -6px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid var(--primary-color);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
}

.message.agent .content::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -6px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-right: 6px solid var(--agent-message-bg);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
}

.message-timestamp {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    margin-top: var(--space-xs);
    text-align: center;
}

/* Chat Input Area */
.chat-input-area {
    padding: var(--space-xl);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-top: 1px solid var(--message-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    position: relative;
}

.chat-input-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: var(--space-xl);
    right: var(--space-xl);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--message-border), transparent);
}

.message-input {
    flex-grow: 1;
    padding: var(--space-lg);
    border: 2px solid var(--message-border);
    border-radius: var(--radius-2xl);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: inherit;
    resize: none; 
    min-height: 56px;
    max-height: 200px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
    line-height: 1.5;
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--focus-ring), var(--shadow-md);
    transform: translateY(-1px);
}

.message-input::placeholder {
    color: var(--text-light);
}

.send-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-2xl);
    padding: var(--space-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
    min-width: 120px;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.send-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-normal);
}

.send-button:hover::before {
    left: 100%;
}

.send-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.send-button:active {
    transform: translateY(0);
}

.send-button svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-fast);
}

.send-button:hover svg {
    transform: translateX(2px);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--message-border);
    animation: modalSlideIn 0.3s ease-out;
    position: relative;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-title {
    margin: 0 0 var(--space-lg);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
}

.modal-info-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
    text-align: center;
}

.form-group {
    margin-bottom: var(--space-xl);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--space-lg);
    border: 2px solid var(--message-border);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--focus-ring), var(--shadow-md);
    background: var(--bg-primary);
}

.modal-actions {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    margin-top: var(--space-xl);
}

/* Typing Indicator */
.typing-indicator {
    margin-bottom: var(--space-xl);
    display: flex;
    max-width: 80%;
    animation: messageSlideIn 0.3s ease-out;
}

.typing-indicator .content {
    background: var(--agent-message-bg);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--message-border);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.typing-indicator .dots {
    display: flex;
    gap: var(--space-xs);
}

.typing-indicator .dots span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typingDot 1.4s infinite ease-in-out;
}

.typing-indicator .dots span:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-indicator .dots span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes typingDot {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Content Styling */
.message .content h1,
.message .content h2,
.message .content h3,
.message .content h4,
.message .content h5,
.message .content h6 {
    margin: 0 0 var(--space-md);
    color: inherit;
    line-height: 1.3;
}

.message .content h1 { font-size: var(--font-size-xl); font-weight: 700; }
.message .content h2 { font-size: var(--font-size-lg); font-weight: 600; }
.message .content h3 { font-size: var(--font-size-base); font-weight: 600; }

.message .content p {
    margin: 0 0 var(--space-md);
    line-height: 1.6;
}

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

.message .content ul,
.message .content ol {
    margin: 0 0 var(--space-md);
    padding-left: var(--space-xl);
}

.message .content li {
    margin-bottom: var(--space-xs);
    line-height: 1.5;
}

.message .content pre {
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--space-md) 0;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    box-shadow: var(--shadow-md);
}

.message .content code {
    background: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 0.9em;
    color: var(--primary-dark);
}

.message .content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.message .content blockquote {
    border-left: 4px solid var(--primary-color);
    background: var(--primary-light);
    padding: var(--space-lg);
    margin: var(--space-md) 0;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-style: italic;
}

.message .content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.message .content a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.message.user .content a {
    color: rgba(255, 255, 255, 0.9);
}

.message.user .content a:hover {
    color: var(--text-white);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        margin: 0;
        max-width: 100vw;
        max-height: 100vh;
        border-radius: 0;
    }
    
    .sidebar {
        width: 280px;
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .sidebar:not(.collapsed) {
        transform: translateX(0);
    }

    .chat-header h1 {
        font-size: var(--font-size-xl);
    }

    .message {
        max-width: 95%;
    }

    .chat-messages {
        padding: var(--space-lg);
    }
    
    .chat-input-area {
        padding: var(--space-lg);
    }
    
    .send-button {
        align-self: flex-end;
        min-width: 100px;
    }

    .header-actions {
        gap: var(--space-md);
    }

    .agent-id-display {
        min-width: 100px;
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .modal-content {
        padding: var(--space-xl);
        margin: var(--space-lg);
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .chat-header {
        padding: var(--space-lg);
    }
    
    .chat-header h1 {
        font-size: var(--font-size-lg);
    }
}

/* Focus and Accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.button:focus,
.message-input:focus,
.form-control:focus,
.icon-button:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* Utility Classes */
.no-conversations-message {
    text-align: center;
    color: var(--text-light);
    padding: var(--space-2xl);
    font-style: italic;
}

.delete-conversation-button {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    opacity: 0;
}

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

.delete-conversation-button:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Welcome Message */
.welcome-message {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 300px;
    opacity: 0.8;
}

.welcome-content {
    text-align: center;
    max-width: 400px;
    padding: var(--space-2xl);
}

.welcome-content i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: var(--space-lg);
    opacity: 0.7;
}

.welcome-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-md);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 var(--space-lg);
}

.example-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-lg);
}

.example-prompt-button {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--message-border);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.example-prompt-button:hover {
    background-color: var(--hover-bg);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.example-prompt-button:focus {
    outline: none;
    box-shadow: var(--focus-ring);
    border-color: var(--primary-color);
}

/* Agent Status Indicator */
.agent-status {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
    position: relative;
}

.status-indicator.connected {
    background: #10b981;
}

.status-indicator.connected::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: #10b981;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* Enhanced Input Container */
.input-container {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-end;
    position: relative;
    width: 100%;
}

.input-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-sm);
    padding: 0 var(--space-sm);
}

.character-count {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    font-weight: 500;
}

.character-count.warning {
    color: #f59e0b;
}

.character-count.error {
    color: #ef4444;
}

.input-hint {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    font-style: italic;
}

/* Enhanced Modal */
.modal-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.modal-body {
    margin-bottom: var(--space-xl);
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon i {
    position: absolute;
    left: var(--space-lg);
    color: var(--text-light);
    z-index: 1;
}

.input-with-icon .form-control {
    padding-left: calc(var(--space-lg) * 2.5);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease-out;
}

.loading-spinner {
    text-align: center;
    color: var(--text-white);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-lg);
}

.loading-spinner p {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin: 0;
}

/* Enhanced Sidebar Icons */
.sidebar-header h3 i {
    margin-right: var(--space-sm);
    opacity: 0.8;
}

.chat-header h1 i {
    margin-right: var(--space-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Button Icon Spacing */
.button i {
    margin-right: var(--space-xs);
}

.button:last-child i:only-child {
    margin-right: 0;
}

/* Enhanced Conversation Navigation */
.conversation-nav {
    flex-grow: 1;
    overflow-y: auto;
    min-height: 0;
}

/* Send Button Disabled State */
.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: var(--shadow-sm) !important;
}

.send-button:disabled:hover {
    transform: none !important;
    box-shadow: var(--shadow-sm) !important;
}

.send-button:disabled::before {
    display: none;
}

/* Message Input Auto-resize */
.message-input {
    overflow: hidden;
    resize: none;
}

/* Enhanced Focus States */
.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--focus-ring), var(--shadow-md);
    transform: translateY(-1px);
}

/* Improved Scrollbar for Chat Messages */
.chat-messages {
    scroll-behavior: smooth;
}

/* Hide welcome message when there are actual messages */
.chat-messages:not(:empty) .welcome-message {
    display: none;
}

.chat-messages.has-messages .welcome-message {
    display: none;
}

/* Enhanced Responsive Design for New Elements */
@media (max-width: 768px) {
    .input-footer {
    flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }
    
    .input-hint {
        display: none;
}

    .welcome-content {
        padding: var(--space-xl);
}

    .welcome-content i {
        font-size: 3rem;
    }
    
    .welcome-content h2 {
        font-size: var(--font-size-xl);
}

    .agent-status {
        flex-direction: column;
        gap: var(--space-xs);
}

    .status-indicator {
        position: absolute;
        top: -2px;
        right: -2px;
        width: 6px;
        height: 6px;
}
}

@media (max-width: 480px) {
    .input-container {
        flex-direction: column;
        gap: var(--space-md);
}
    
    .input-actions {
        flex-direction: row;
        justify-content: flex-end;
    }
    
    .send-button {
        min-width: 80px;
}

    .modal-header {
        margin-bottom: var(--space-lg);
    }
    
    .modal-body {
        margin-bottom: var(--space-lg);
    }
}

/* Animation for message appearance */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Enhanced hover effects */
.conversation-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.icon-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    transform: scale(1.05);
}

/* Improved accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
}
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0000ff;
        --text-primary: #000000;
        --text-secondary: #333333;
        --bg-primary: #ffffff;
        --bg-secondary: #f0f0f0;
        --message-border: #000000;
    }
}

/* Dark mode support (if needed in future) */
@media (prefers-color-scheme: dark) {
    /* Dark mode variables would go here if implementing dark mode */
}