/* DentiBuddy AI Styles - Llama3.1:8b Multi-Language Edition */
/* Modern, responsive design with dental health theme */

/* CSS Variables for consistent theming */
:root {
    /* Primary Colors - Dental Health Theme */
    --primary-blue: #2563eb;
    --primary-blue-hover: #1d4ed8;
    --primary-blue-light: #dbeafe;
    --accent-teal: #0891b2;
    --accent-teal-light: #cffafe;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Animations */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-blue-light) 100%);
    min-height: 100vh;
    line-height: 1.6;
    color: var(--gray-800);
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-teal) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-icon {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    animation: pulse 2s infinite;
}

.loading-text h3 {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.loading-text p {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: var(--space-6);
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

/* Main App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    box-shadow: var(--shadow-xl);
}

/* Header */
.app-header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-4) var(--space-6);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.logo-text h1 {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--gray-800);
}

.version-tag {
    font-size: 0.75rem;
    background: var(--primary-blue-light);
    color: var(--primary-blue);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-medium);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.language-btn:hover {
    background: var(--gray-200);
    border-color: var(--gray-400);
}

.language-btn .flag {
    font-size: 1.25rem;
}

.language-btn .lang-name {
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
}

.language-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1000;
}

.language-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.language-option:hover {
    background: var(--gray-100);
}

.language-option.active {
    background: var(--primary-blue-light);
    color: var(--primary-blue);
}

/* Control Buttons */
.settings-btn, .new-chat-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    font-family: inherit;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.settings-btn {
    background: var(--gray-100);
    color: var(--gray-600);
}

.settings-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.new-chat-btn {
    background: var(--primary-blue);
    color: white;
}

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

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

/* Welcome Section */
.welcome-section {
    padding: var(--space-12) var(--space-6);
    text-align: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
}

.welcome-content {
    max-width: 800px;
    margin: 0 auto;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    font-size: 2rem;
    color: white;
}

.welcome-content h2 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--gray-800);
    margin-bottom: var(--space-4);
}

.welcome-content p {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

/* Feature Cards */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.feature-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--space-4);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--gray-800);
    margin-bottom: var(--space-2);
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Quick Actions */
.quick-actions h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--gray-800);
    margin-bottom: var(--space-4);
}

.quick-action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    cursor: pointer;
    font-family: inherit;
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
    transition: all var(--transition-normal);
}

.quick-action-btn:hover {
    border-color: var(--primary-blue);
    background: var(--primary-blue-light);
    transform: translateY(-2px);
}

.quick-action-btn i {
    font-size: 1.5rem;
    color: var(--primary-blue);
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
    scroll-behavior: smooth;
    background: linear-gradient(135deg, #a8b5c7 0%, #6b7a8f 100%);
}

/* Message Styles */
.message {
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.3s ease-out;
}

.message-user {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

.message-assistant {
    display: flex;
    justify-content: flex-start;
    gap: var(--space-3);
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.message-avatar.user {
    background: var(--primary-blue);
    color: white;
}

.message-avatar.assistant {
    background: linear-gradient(135deg, var(--accent-teal), var(--primary-blue));
    color: white;
}

.message-content {
    max-width: 70%;
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    position: relative;
}

.message-content.user {
    background: var(--primary-blue);
    color: white;
    border-bottom-right-radius: var(--radius-sm);
}

.message-content.assistant {
    background: white;
    color: #1a1a1a; /* Dark gray-black for excellent readability */
    border: 1px solid var(--gray-200);
    border-bottom-left-radius: var(--radius-sm);
}

.message-text {
    line-height: 1.6;
    word-wrap: break-word;
    color: inherit; /* Ensures the text inherits the message-content color */
}

.message-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-2);
    font-size: 0.75rem;
    opacity: 0.7;
}

.message-time {
    color: inherit;
}

.message-language {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    background: rgba(255, 255, 255, 0.2);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

/* Input Section */
.input-section {
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: var(--space-4) var(--space-6);
}

.emergency-banner {
    background: var(--error);
    color: white;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    animation: slideDown 0.3s ease-out;
}

.dismiss-btn {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: var(--space-1);
    margin-left: auto;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.dismiss-btn:hover {
    opacity: 1;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-teal), var(--primary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
}

.typing-animation {
    display: flex;
    gap: var(--space-1);
}

.typing-animation span {
    width: 6px;
    height: 6px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-animation span:nth-child(1) { animation-delay: -0.32s; }
.typing-animation span:nth-child(2) { animation-delay: -0.16s; }
.typing-animation span:nth-child(3) { animation-delay: 0s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
    40% { transform: scale(1.2); opacity: 1; }
}

/* Message Form */
.message-form {
    width: 100%;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-3);
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-3);
    transition: all var(--transition-fast);
}

.input-wrapper:focus-within {
    border-color: var(--primary-blue);
    background: white;
}

.message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    color: #000000; /* Changed to solid black for better readability */
    max-height: 120px;
    min-height: 24px;
}

.message-input::placeholder {
    color: var(--gray-400);
}

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

.send-btn:hover:not(:disabled) {
    background: var(--primary-blue-hover);
    transform: translateY(-1px);
}

.send-btn:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
}

/* Input Footer */
.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-2);
    padding: 0 var(--space-2);
}

.input-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.75rem;
    color: var(--gray-500);
}

.separator {
    opacity: 0.5;
}

.input-features {
    display: flex;
    gap: var(--space-2);
}

.feature-btn {
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.feature-btn:hover {
    background: var(--gray-200);
    color: var(--gray-600);
}

.feature-btn.active {
    background: var(--primary-blue);
    color: white;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--gray-800);
}

.close-btn {
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.modal-body {
    padding: var(--space-6);
}

.setting-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--gray-100);
}

.setting-group:last-child {
    border-bottom: none;
}

.setting-group label {
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
}

.setting-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-blue);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        box-shadow: none;
    }
    
    .app-header {
        padding: var(--space-3) var(--space-4);
    }
    
    .header-content {
        flex-wrap: wrap;
        gap: var(--space-3);
    }
    
    .logo-text h1 {
        font-size: 1.5rem;
    }
    
    .version-tag {
        display: none;
    }
    
    .welcome-section {
        padding: var(--space-8) var(--space-4);
    }
    
    .welcome-content h2 {
        font-size: 2rem;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .quick-action-buttons {
        grid-template-columns: 1fr;
    }
    
    .messages-container {
        padding: var(--space-4);
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .input-section {
        padding: var(--space-3) var(--space-4);
    }
    
    .language-btn .lang-name {
        display: none;
    }
    
    .new-chat-btn span {
        display: none;
    }
}

@media (max-width: 480px) {
    .header-controls {
        gap: var(--space-2);
    }
    
    .welcome-content h2 {
        font-size: 1.75rem;
    }
    
    .welcome-content p {
        font-size: 1rem;
    }
    
    .message-content {
        max-width: 90%;
        padding: var(--space-3);
    }
    
    .input-wrapper {
        padding: var(--space-2);
    }
    
    .modal-content {
        margin: var(--space-4);
        width: calc(100% - 2rem);
    }
}

/* Print Styles */
@media print {
    .app-header,
    .input-section,
    .loading-screen {
        display: none !important;
    }
    
    .main-content {
        height: auto !important;
        overflow: visible !important;
    }
    
    .messages-container {
        overflow: visible !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --gray-100: #f0f0f0;
        --gray-200: #d0d0d0;
        --gray-300: #b0b0b0;
        --primary-blue: #0000ff;
        --accent-teal: #008080;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark Mode Support (for future implementation) */
@media (prefers-color-scheme: dark) {
    :root {
        --gray-50: #1f2937;
        --gray-100: #374151;
        --gray-200: #4b5563;
        --gray-800: #f9fafb;
        --gray-900: #ffffff;
    }
}