/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #10a37f;
    --primary-dark: #0d8c6d;
    --secondary-color: #5436da;
    --bg-color: #ffffff;
    --sidebar-bg: #f7f7f8;
    --chat-bg: #ffffff;
    --border-color: #e5e5e5;
    --text-primary: #202123;
    --text-secondary: #6e6e80;
    --text-tertiary: #acacbe;
    --user-msg-bg: #f7f7f8;
    --ai-msg-bg: #10a37f10;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.2s ease;
    --safe-area-top: env(safe-area-inset-top);
    --safe-area-bottom: env(safe-area-inset-bottom);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    padding-top: var(--safe-area-top);
    padding-bottom: var(--safe-area-bottom);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    display: flex;
    height: 100vh;
    background: var(--bg-color);
    position: relative;
}

/* Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--chat-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 16px;
    z-index: 100;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.mobile-menu-btn,
.mobile-settings-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
}

.mobile-menu-btn:hover,
.mobile-settings-btn:hover {
    background: var(--sidebar-bg);
    color: var(--text-primary);
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-logo .logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

.mobile-logo .logo-title {
    font-weight: 700;
    font-size: 18px;
    color: var(--text-primary);
}

/* Mobile Overlay */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
    backdrop-filter: blur(2px);
}

.mobile-overlay.active {
    display: block;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: relative;
    z-index: 99;
    transition: transform 0.3s ease;
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
        z-index: 99;
    }

    .sidebar.active {
        transform: translateX(0);
    }
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-weight: 700;
    font-size: 18px;
    color: var(--text-primary);
}

.logo-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.new-chat-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.new-chat-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.chat-history {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.history-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-tertiary);
}

.history-empty i {
    font-size: 40px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* NEW: Chat session items */
.chat-session-item {
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid transparent;
    background: white;
}

.chat-session-item:hover {
    background: white;
    border-color: var(--border-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.chat-session-item.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.chat-session-item.active .session-title {
    color: white;
}

.chat-session-item.active .session-meta {
    color: rgba(255, 255, 255, 0.9);
}

.chat-session-item.active .session-delete-btn {
    color: rgba(255, 255, 255, 0.7);
}

.chat-session-item.active .session-delete-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.session-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0; /* For text truncation */
}

.session-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    flex-shrink: 0;
}

.session-details {
    flex: 1;
    min-width: 0; /* For text truncation */
}

.session-title {
    font-weight: 500;
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-tertiary);
}

.session-role {
    background: var(--sidebar-bg);
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 500;
}

.chat-session-item.active .session-role {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.session-time {
    font-size: 10px;
    opacity: 0.8;
}

.session-delete-btn {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: var(--transition);
    flex-shrink: 0;
    opacity: 0;
}

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

.session-delete-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
}

.user-status {
    font-size: 12px;
    color: var(--text-secondary);
}

.settings-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@media (max-width: 768px) {
    .main-content {
        margin-top: 60px;
    }
}

/* Chat Header */
.chat-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--chat-bg);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

@media (min-width: 769px) {
    .chat-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.header-left h1 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

@media (max-width: 480px) {
    .header-left h1 {
        font-size: 18px;
    }
}

.domain-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.domain-tag {
    padding: 6px 12px;
    background: var(--sidebar-bg);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
}

.domain-tag.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.domain-tag:hover:not(.active) {
    background: var(--border-color);
}

.more-domains-btn {
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    font-size: 13px;
    background: none;
    border: none;
    padding: 4px 8px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.engine-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
}

.status-dot.online {
    background: #22c55e;
}

.status-dot.offline {
    background: #ef4444;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.share-btn, .export-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.share-btn:hover, .export-btn:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .header-actions {
        display: none;
    }
}

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 16px;
    background: var(--chat-bg);
    -webkit-overflow-scrolling: touch;
}

@media (min-width: 769px) {
    .chat-container {
        padding: 24px;
    }
}

.welcome-message {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
    text-align: center;
}

@media (min-width: 769px) {
    .welcome-message {
        padding: 40px 0;
    }
}

.welcome-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

@media (min-width: 769px) {
    .welcome-icon {
        font-size: 64px;
        margin-bottom: 24px;
    }
}

.welcome-content h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (min-width: 769px) {
    .welcome-content h2 {
        font-size: 32px;
        margin-bottom: 16px;
    }
}

.welcome-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 30px;
}

@media (min-width: 769px) {
    .welcome-subtitle {
        font-size: 18px;
        margin-bottom: 40px;
    }
}

.capabilities-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 30px;
}

@media (min-width: 480px) {
    .capabilities-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (min-width: 769px) {
    .capabilities-grid {
        gap: 20px;
        margin-bottom: 40px;
    }
}

.capability-card {
    padding: 20px;
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.capability-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.capability-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

@media (min-width: 769px) {
    .capability-icon {
        font-size: 32px;
        margin-bottom: 16px;
    }
}

.capability-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

@media (min-width: 769px) {
    .capability-card h3 {
        font-size: 18px;
    }
}

.capability-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (min-width: 769px) {
    .capability-card p {
        font-size: 14px;
    }
}

.quick-prompts {
    margin-top: 30px;
}

@media (min-width: 769px) {
    .quick-prompts {
        margin-top: 40px;
    }
}

.quick-prompts h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

@media (min-width: 769px) {
    .quick-prompts h3 {
        font-size: 18px;
        margin-bottom: 16px;
    }
}

.prompts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

@media (min-width: 480px) {
    .prompts-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 12px;
    }
}

.quick-prompt {
    padding: 14px;
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: left;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
}

.quick-prompt:hover {
    background: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Message Bubbles */
.message {
    max-width: 100%;
    margin: 0 auto 20px;
    animation: fadeIn 0.3s ease;
}

@media (min-width: 769px) {
    .message {
        max-width: 800px;
        margin: 0 auto 24px;
    }
}

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

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

.message-ai {
    display: flex;
    justify-content: flex-start;
}

.message-bubble {
    max-width: 85%;
    padding: 16px;
    border-radius: var(--radius-lg);
    position: relative;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@media (max-width: 480px) {
    .message-bubble {
        max-width: 90%;
        padding: 12px;
    }
}

.message-user .message-bubble {
    background: var(--user-msg-bg);
    border-top-right-radius: 4px;
}

.message-ai .message-bubble {
    background: var(--ai-msg-bg);
    border-top-left-radius: 4px;
}

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

@media (min-width: 769px) {
    .message-header {
        margin-bottom: 12px;
        font-size: 14px;
    }
}

.message-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
}

@media (min-width: 769px) {
    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
}

.message-user .message-avatar {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.message-ai .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.message-sender {
    font-weight: 600;
}

.message-timestamp {
    color: var(--text-tertiary);
    font-size: 11px;
}

@media (min-width: 769px) {
    .message-timestamp {
        font-size: 12px;
    }
}

.message-content {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
}

@media (min-width: 769px) {
    .message-content {
        font-size: 15px;
        line-height: 1.7;
    }
}

.message-content h1 {
    font-size: 1.4em;
    margin: 1em 0 0.6em 0;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.3em;
}

.message-content h2 {
    font-size: 1.2em;
    margin: 1.2em 0 0.6em 0;
    color: var(--secondary-color);
}

.message-content h3 {
    font-size: 1.1em;
    margin: 1em 0 0.5em 0;
    color: var(--text-primary);
}

.message-content p {
    margin-bottom: 0.8em;
    line-height: 1.6;
}

.message-content ul,
.message-content ol {
    margin: 0.8em 0;
    padding-left: 1.2em;
}

.message-content li {
    margin-bottom: 0.4em;
    line-height: 1.5;
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
    font-size: 0.9em;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: block;
    overflow-x: auto;
}

.message-content th,
.message-content td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.message-content th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
    font-size: 0.85em;
}

.message-content pre {
    background: #f6f8fa;
    border-radius: var(--radius-md);
    padding: 12px;
    margin: 1em 0;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85em;
    line-height: 1.4;
    border: 1px solid var(--border-color);
}

.message-content code {
    background: rgba(16, 163, 127, 0.1);
    padding: 2px 5px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85em;
    color: var(--primary-dark);
}

.message-content blockquote {
    border-left: 3px solid var(--primary-color);
    margin: 1em 0;
    padding: 0.5em 1em;
    background: rgba(16, 163, 127, 0.05);
    font-style: italic;
}

.executive-summary {
    background: linear-gradient(135deg, rgba(16, 163, 127, 0.1), rgba(84, 54, 218, 0.05));
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 1em 0;
    border-left: 3px solid var(--primary-color);
}

.confidence-score {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: linear-gradient(135deg, rgba(16, 163, 127, 0.15), rgba(84, 54, 218, 0.1));
    border-radius: 16px;
    font-size: 0.9em;
    font-weight: 600;
    margin: 0.8em 0;
    border: 1px solid var(--primary-color);
}

.message-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.message-action-btn {
    padding: 6px 10px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 4px;
    border: none;
    font-family: inherit;
}

@media (min-width: 769px) {
    .message-action-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
}

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

/* Input Area */
.input-area {
    border-top: 1px solid var(--border-color);
    background: var(--chat-bg);
    padding: 16px;
    position: relative;
}

@media (min-width: 769px) {
    .input-area {
        padding: 20px 24px;
    }
}

.input-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.input-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 12px;
}

@media (min-width: 769px) {
    .input-controls {
        flex-direction: row;
        align-items: center;
        gap: 16px;
    }
}

/* NEW: Role selector styles */
.role-selector {
    flex-shrink: 0;
    min-width: 150px;
}

.role-selector select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: white;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' 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 10px center;
    background-size: 16px;
    padding-right: 36px;
}

.role-selector select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.1);
}

.domain-selector {
    flex-shrink: 0;
    min-width: 180px;
}

.domain-selector select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: white;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' 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 10px center;
    background-size: 16px;
    padding-right: 36px;
}

.search-options {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    flex: 1;
}

@media (min-width: 769px) {
    .search-options {
        gap: 16px;
    }
}

.option-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.option-toggle input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    width: 36px;
    height: 20px;
    background-color: #ccc;
    border-radius: 20px;
    position: relative;
    transition: var(--transition);
}

.toggle-slider:before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: white;
    top: 2px;
    left: 2px;
    transition: var(--transition);
}

input:checked + .toggle-slider {
    background-color: var(--primary-color);
}

input:checked + .toggle-slider:before {
    transform: translateX(16px);
}

.paper-slider {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    flex: 1;
    min-width: 150px;
}

.paper-slider input[type="range"] {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    appearance: none;
}

.paper-slider input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.paper-slider input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.paper-count {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 20px;
    text-align: right;
}

.text-input-container {
    display: flex;
    align-items: flex-end;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 12px;
    transition: var(--transition);
    gap: 8px;
}

.text-input-container:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.1);
}

textarea#messageInput {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.5;
    max-height: 150px;
    min-height: 24px;
    padding: 4px;
    background: transparent;
}

.input-buttons {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.send-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: var(--primary-color);
    color: white;
    flex-shrink: 0;
}

.send-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

.input-footer {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
    font-size: 11px;
    color: var(--text-tertiary);
}

@media (min-width: 769px) {
    .input-footer {
        flex-direction: row;
        justify-content: space-between;
        font-size: 12px;
    }
}

.disclaimer {
    display: flex;
    align-items: center;
    gap: 6px;
}

.shortcuts {
    display: flex;
    align-items: center;
    gap: 4px;
}

.shortcuts kbd {
    background: var(--sidebar-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 10px;
}

/* Settings Panel */
.settings-panel {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--chat-bg);
    border-left: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transition: right 0.3s ease;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

@media (min-width: 769px) {
    .settings-panel {
        width: 380px;
        right: -400px;
    }
}

.settings-panel.active {
    right: 0;
}

.settings-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.settings-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    -webkit-overflow-scrolling: touch;
}

.setting-group {
    margin-bottom: 24px;
}

.setting-group h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.setting-item {
    margin-bottom: 16px;
}

.setting-item label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.setting-item select,
.setting-item input[type="text"],
.setting-item input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    background: white;
}

.setting-item input[readonly] {
    background: var(--sidebar-bg);
    cursor: default;
}

.setting-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.setting-checkboxes label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    user-select: none;
}

.btn {
    padding: 12px;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-top: 8px;
}

.btn-secondary {
    background: var(--sidebar-bg);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 16px;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--chat-bg);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    max-height: calc(80vh - 80px);
    -webkit-overflow-scrolling: touch;
}

.domain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

@media (min-width: 480px) {
    .domain-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
}

.domain-card {
    padding: 20px 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: white;
}

.domain-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.domain-card.active {
    border-color: var(--primary-color);
    background: rgba(16, 163, 127, 0.05);
}

.domain-icon {
    font-size: 28px;
    margin-bottom: 10px;
}

.domain-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
}

.domain-card p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    backdrop-filter: blur(4px);
}

.loading-overlay.active {
    display: flex;
}

.loading-content {
    text-align: center;
    max-width: 400px;
    padding: 0 20px;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-content p {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.loading-details {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.loading-step {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.step-icon {
    font-size: 18px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--primary-color);
    color: white;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 4000;
    transition: transform 0.3s ease;
    max-width: 90%;
}

@media (min-width: 769px) {
    .toast {
        bottom: 24px;
        padding: 12px 24px;
    }
}

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

.toast-content {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Status Indicator */
.status-indicator {
    position: fixed;
    bottom: 10px;
    right: 10px;
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    border-radius: 6px;
    font-size: 11px;
    z-index: 9999;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 200px;
}

@media (max-width: 768px) {
    .status-indicator {
        display: none;
    }
}

/* Responsive adjustments for role selector */
@media (max-width: 768px) {
    .input-controls {
        flex-direction: column;
    }

    .role-selector,
    .domain-selector {
        width: 100%;
        min-width: auto;
    }

    .search-options {
        width: 100%;
        justify-content: space-between;
    }

    .paper-slider {
        min-width: 120px;
    }
}

@media (max-width: 480px) {
    .role-selector select,
    .domain-selector select {
        font-size: 13px;
        padding: 8px 10px;
        padding-right: 32px;
    }

    .chat-session-item {
        padding: 10px;
    }

    .session-icon {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .session-title {
        font-size: 12px;
    }

    .session-meta {
        font-size: 10px;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-icon,
    .message-avatar,
    .user-avatar,
    .session-icon {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Print styles */
@media print {
    .sidebar,
    .input-area,
    .mobile-header,
    .settings-panel,
    .modal {
        display: none !important;
    }

    .main-content {
        margin: 0;
        padding: 0;
    }

    .chat-container {
        padding: 0;
        overflow: visible;
        height: auto;
    }

    .message-bubble {
        max-width: 100%;
        border: 1px solid #ddd;
    }
}