:root {
    --primary: #10b981;
    --primary-dark: #059669;
    --secondary: #3b82f6;
    --sidebar: #1f2937;
    --chat-bg: #111827;
    --message-user: #374151;
    --message-bot: #1e293b;
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border: #4b5563;
    --input-bg: #374151;
    --user-bubble: #10b981;
    --bot-bubble: #475569;
    --voice-active: #ef4444;
    --emergency-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --header-height: 60px;
    --footer-height: 70px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--chat-bg);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: none;
}

.app-container {
    display: flex;
    height: 100vh;
    position: relative;
    -webkit-overflow-scrolling: touch;
}

/* Add natural scrolling behavior for mobile devices */
.messages-container {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    overscroll-behavior: contain;
    transform: translateZ(0);
    will-change: transform;
    padding-bottom: 160px; /* Add padding to prevent messages from being hidden behind input */
}

/* Ensure body and containers allow natural scrolling */
.history {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    transform: translateZ(0);
    will-change: transform;
}

/* Improve touch interactions for mobile */
.message-content, .tool-btn, .voice-btn, .input-btn, .history-item, .new-chat-btn {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* Prevent text selection on interactive elements */
.user-input, .message-content, .tool-btn, .voice-btn {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Allow text selection only in input fields */
.user-input {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

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

.mobile-menu-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.mobile-title {
    font-size: 18px;
    font-weight: 600;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background-color: var(--sidebar);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    transition: transform 0.3s ease;
    z-index: 50;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 600;
}

.new-chat-btn {
    margin: 12px;
    padding: 12px;
    background-color: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.new-chat-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.new-chat-btn i {
    font-size: 16px;
}

.history {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.history-item {
    padding: 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 4px;
    color: var(--text-secondary);
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.history-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.user-info:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

/* Main Chat Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.chat-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-title {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.specialty-indicator {
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 12px;
    background-color: var(--secondary);
}

.model-selector {
    display: flex;
    align-items: center;
    gap: 8px;
}

.model-selector select {
    background-color: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 8px;
    font-size: 14px;
    outline: none;
}

/* Mobile Specialty Selector */
.mobile-specialty-selector {
    display: none;
    padding: 12px 16px;
    background-color: var(--sidebar);
    border-bottom: 1px solid var(--border);
}

.mobile-specialty-selector select {
    width: 100%;
    padding: 10px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    display: flex;
    max-width: 100%;
    line-height: 1.6;
}

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

.bot-message {
    justify-content: flex-start;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
    margin: 0 8px;
}

.user-avatar {
    background: linear-gradient(135deg, var(--user-bubble), var(--primary-dark));
}

.bot-avatar {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
}

.message-content {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 18px;
    position: relative;
    word-wrap: break-word;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.user-message .message-content {
    background-color: var(--user-bubble);
    color: white;
    border-bottom-right-radius: 4px;
}

.bot-message .message-content {
    background-color: var(--bot-bubble);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-sender {
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 14px;
    opacity: 0.8;
}

/* Medical Alert Styling */
.medical-alert {
    background-color: rgba(239, 68, 68, 0.2);
    border-left: 4px solid var(--emergency-color);
    padding: 12px 16px;
    margin: 8px 0;
    border-radius: 4px;
}

.medical-warning {
    background-color: rgba(245, 158, 11, 0.2);
    border-left: 4px solid var(--warning-color);
    padding: 12px 16px;
    margin: 8px 0;
    border-radius: 4px;
}

.medical-advice {
    background-color: rgba(16, 185, 129, 0.2);
    border-left: 4px solid var(--success-color);
    padding: 12px 16px;
    margin: 8px 0;
    border-radius: 4px;
}

/* Input Area - FIXED POSITIONING */
.input-container {
    padding: 16px;
    background-color: var(--sidebar);
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 10;
}

.input-wrapper {
    position: relative;
    max-width: 100%;
    margin: 0 auto;
}

.user-input {
    width: 100%;
    padding: 12px 44px 12px 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 16px;
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 120px;
    min-height: 44px;
}

.user-input:focus {
    border-color: var(--primary);
}

.input-buttons {
    position: absolute;
    right: 8px;
    bottom: 8px;
    display: flex;
    gap: 4px;
}

.input-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.input-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.1);
}

.send-btn {
    background-color: var(--primary);
    color: white;
}

.send-btn:hover {
    background-color: var(--primary-dark);
}

.send-btn:disabled {
    background-color: var(--border);
    cursor: not-allowed;
}

/* Voice Controls */
.voice-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.voice-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 13px;
    min-width: 80px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.voice-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.voice-btn.active {
    background-color: var(--voice-active);
    color: white;
}

.voice-btn i {
    font-size: 18px;
}

.voice-btn-text {
    font-size: 12px;
}

/* Voice Visualization */
.voice-visualizer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3px;
    margin-top: 8px;
    height: 20px;
}

.voice-bar {
    width: 3px;
    height: 4px;
    background-color: var(--text-muted);
    border-radius: 2px;
    transition: height 0.1s ease;
}

.voice-bar.active {
    background-color: var(--voice-active);
}

/* Voice Recording Indicator */
.voice-recording-indicator {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px 30px;
    border-radius: 12px;
    z-index: 300;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.voice-recording-indicator i {
    font-size: 36px;
    color: var(--voice-active);
    margin-bottom: 10px;
    display: block;
}

/* Status and Typing Indicators */
.status-bar {
    padding: 8px 16px;
    background-color: var(--sidebar);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
    height: var(--footer-height);
}

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

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
}

.status-dot.thinking {
    background-color: #f59e0b;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--text-muted);
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

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

/* Welcome Screen */
.welcome-screen {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--chat-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.welcome-content {
    max-width: 600px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
}

.welcome-title {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.user-info-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background-color: var(--sidebar);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: left;
}

.form-group input, .form-group select {
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary);
}

.start-chat-btn {
    padding: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.start-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* Medical Tools Section */
.medical-tools {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0 16px;
}

.tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 10px 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 12px;
    min-width: 70px;
    flex: 1;
    max-width: 120px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.tool-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.tool-btn i {
    font-size: 18px;
}

/* Emergency Notice */
.emergency-notice {
    background-color: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--emergency-color);
    border-radius: 8px;
    padding: 12px;
    margin: 16px 0;
    text-align: center;
    font-size: 14px;
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 40;
}

/* Health Data Display */
.health-data {
    background-color: var(--sidebar);
    border-radius: 8px;
    padding: 16px;
    margin: 12px 0;
    border: 1px solid var(--border);
}

.health-data h3 {
    margin-bottom: 12px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.health-data-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.health-data-item:last-child {
    border-bottom: none;
}

/* Responsive Design */
/* Tablets */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }
    
    .message-content {
        max-width: 80%;
    }
    
    .chat-header {
        padding: 16px;
    }
    
    .messages-container {
        padding: 16px;
        padding-bottom: 160px; /* Maintain bottom padding */
    }
}

/* Mobile Devices */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .mobile-header {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        left: -260px;
        bottom: 0;
        z-index: 50;
        width: 260px;
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .main-content {
        margin-top: var(--header-height);
        margin-bottom: 0; /* Remove bottom margin since input is fixed */
    }
    
    .chat-header {
        display: none;
    }
    
    .mobile-specialty-selector {
        display: block;
    }
    
    .messages-container {
        padding: 12px;
        padding-bottom: 200px; /* Increased padding for mobile to account for input area */
    }
    
    .message-content {
        max-width: 85%;
        padding: 14px 18px;
    }
    
    /* FIXED INPUT CONTAINER FOR MOBILE */
    .input-container {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 12px;
        z-index: 30;
        background-color: var(--sidebar);
        border-top: 1px solid var(--border);
    }
    
    .status-bar {
        position: fixed;
        bottom: 160px; /* Position above input container */
        left: 0;
        right: 0;
        z-index: 20;
        background-color: transparent;
        border-top: none;
        padding: 8px 12px;
        height: auto;
    }
    
    .voice-controls {
        gap: 8px;
    }
    
    .voice-btn {
        padding: 8px 10px;
        min-width: 70px;
        font-size: 12px;
        min-height: 44px;
        min-width: 44px;
    }
    
    .medical-tools {
        gap: 6px;
    }
    
    .tool-btn {
        padding: 8px 10px;
        min-width: 65px;
        font-size: 11px;
        min-height: 44px;
        min-width: 44px;
    }
    
    .welcome-content {
        padding: 0 16px;
    }
    
    .welcome-title {
        font-size: 28px;
    }
    
    .welcome-subtitle {
        font-size: 16px;
    }
    
    .user-info-form {
        padding: 20px;
    }
    
    /* Improve scrolling containers for mobile */
    .messages-container, .history {
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .messages-container::-webkit-scrollbar, 
    .history::-webkit-scrollbar {
        display: none;
    }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
    .message-content {
        max-width: 90%;
    }
    
    .messages-container {
        padding: 8px;
        padding-bottom: 180px; /* Adjusted padding for smaller screens */
        gap: 12px;
    }
    
    .message-avatar {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    
    .message-content {
        padding: 10px 14px;
        font-size: 14px;
    }
    
    .voice-controls {
        gap: 6px;
    }
    
    .voice-btn {
        padding: 6px 8px;
        min-width: 60px;
        font-size: 11px;
    }
    
    .medical-tools {
        gap: 4px;
    }
    
    .tool-btn {
        padding: 6px 8px;
        min-width: 60px;
        font-size: 10px;
    }
    
    .tool-btn i {
        font-size: 16px;
    }
    
    .status-bar {
        padding: 8px 12px;
        font-size: 12px;
        bottom: 150px; /* Adjusted for smaller screens */
    }
    
    .welcome-title {
        font-size: 24px;
    }
    
    .welcome-subtitle {
        font-size: 15px;
    }
    
    .user-info-form {
        padding: 16px;
    }
}

/* Very Small Mobile Devices */
@media (max-width: 360px) {
    .mobile-header {
        padding: 0 12px;
    }
    
    .mobile-title {
        font-size: 16px;
    }
    
    .messages-container {
        padding: 6px;
        padding-bottom: 170px; /* Adjusted for very small screens */
    }
    
    .message-content {
        max-width: 95%;
        padding: 8px 12px;
    }
    
    .input-container {
        padding: 10px;
    }
    
    .user-input {
        padding: 10px 40px 10px 10px;
        font-size: 15px;
    }
    
    .voice-controls {
        gap: 4px;
    }
    
    .voice-btn {
        padding: 6px;
        min-width: 55px;
    }
    
    .medical-tools {
        gap: 3px;
    }
    
    .tool-btn {
        padding: 6px;
        min-width: 55px;
    }
    
    .status-bar {
        bottom: 140px; /* Adjusted for very small screens */
    }
}

/* Landscape Mode for Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .welcome-screen {
        padding: 10px;
        overflow-y: auto;
    }
    
    .welcome-content {
        gap: 16px;
    }
    
    .welcome-title {
        font-size: 24px;
    }
    
    .welcome-subtitle {
        font-size: 14px;
    }
    
    .user-info-form {
        padding: 16px;
        max-width: 350px;
    }
    
    .messages-container {
        padding: 8px;
        padding-bottom: 140px; /* Reduced padding for landscape */
    }
    
    .input-container {
        padding: 8px;
    }
    
    .medical-tools {
        margin-top: 8px;
    }
    
    .status-bar {
        bottom: 120px; /* Adjusted for landscape */
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .message-content {
        border-radius: 20px;
    }
    
    .tool-btn, .voice-btn {
        border-radius: 10px;
    }
}

/* System message styling */
.system-message {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    margin: 10px 0;
    font-size: 0.9em;
    padding: 8px 16px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
}