:root {

    --primary: #667eea;
    --secondary: #764ba2;
    --accent: #4f46e5;
    --bg-dark: #0a0a0f;
    --bg-darker: #0f1420;
    --bg-card: rgba(26, 31, 58, 0.95);
    --bg-overlay: rgba(10, 10, 15, 0.9);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --border-color: rgba(102, 126, 234, 0.2);
    --border-hover: rgba(102, 126, 234, 0.4);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s ease;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Consolas', 'Monaco', monospace;
}

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

html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}
.ai-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}
.ai-sidebar {
    width: 280px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition-normal);
}
.ai-brand {
    padding: 32px 24px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.ai-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    position: relative;
}
.ai-avatar-img {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    position: relative;
    overflow: hidden;
}
.ai-avatar-img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shine 3s ease-in-out infinite;
}
@keyframes shine {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}
.ai-status {
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 16px;
    height: 16px;
    background: var(--success);
    border: 3px solid var(--bg-card);
    border-radius: var(--radius-full);
    box-shadow: 0 0 10px var(--success);
}
.ai-brand h1 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ai-brand p {
    font-size: 14px;
    color: var(--text-secondary);
}
.ai-nav {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    font-weight: 500;
}

.ai-nav-item:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--text-primary);
    transform: translateX(4px);
}

.ai-nav-item.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: var(--shadow-glow);
}

.ai-nav-item i {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.ai-user {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.ai-user-info {
    flex: 1;
}

.ai-user-info strong {
    display: block;
    font-size: 14px;
    margin-bottom: 4px;
}

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

.ai-login-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-login-btn:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: scale(1.05);
}
.ai-main {
    flex: 1;
    margin-left: 280px;
    padding: 32px;
    min-height: 100vh;
}

.ai-page {
    display: none;
    animation: fadeIn 0.4s ease;
}

.ai-page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.ai-page-header {
    margin-bottom: 32px;
}

.ai-page-header h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.ai-page-header p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
}
.ai-btn {
    padding: 12px 24px;
    border-radius: var(--radius-md);
    border: none;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    white-space: nowrap;
}

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

.ai-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.ai-btn-secondary {
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.ai-btn-secondary:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: var(--border-hover);
}

.ai-btn-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.ai-btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
}
.ai-chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.ai-chat-actions {
    display: flex;
    gap: 12px;
}

.ai-chat-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    height: calc(100vh - 180px);
    display: flex;
    flex-direction: column;
}

.ai-chat-messages {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.message {
    max-width: 75%;
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    position: relative;
    animation: slideIn 0.3s ease;
}

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

.message.bot {
    align-self: flex-start;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: var(--radius-sm);
}

.message.user {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-bottom-right-radius: var(--radius-sm);
}

.message-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 8px;
    text-align: right;
}
.ai-typing {
    align-self: flex-start;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    display: none;
    align-items: center;
    gap: 12px;
    margin: 0 24px 16px;
}

.typing-dots {
    display: flex;
    gap: 6px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: var(--radius-full);
    animation: bounce 1.4s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

.ai-chat-input {
    border-top: 1px solid var(--border-color);
    padding: 24px;
    background: var(--bg-overlay);
}

.ai-input-wrapper {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

#message-input {
    flex: 1;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    resize: none;
    min-height: 52px;
    max-height: 120px;
    transition: var(--transition-normal);
}

#message-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.ai-input-btn {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-input-btn:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: scale(1.05);
}

.ai-quick-questions {
    padding: 16px 0 0;
}

.ai-quick-questions h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.quick-questions-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.quick-question {
    padding: 10px 16px;
    background: rgba(102, 126, 234, 0.08);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition-normal);
    white-space: nowrap;
}

.quick-question:hover {
    background: rgba(102, 126, 234, 0.15);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.ai-learn-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.ai-learn-form {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 32px;
}

.ai-learn-form h3 {
    font-size: 20px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}
.ai-learn-list {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 32px;
}

.search-box {
    position: relative;
    margin-bottom: 20px;
}

.search-box input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.responses-list {
    max-height: 320px;
    overflow-y: auto;
    margin-bottom: 24px;
}

.response-item {
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    border: 1px solid transparent;
    transition: var(--transition-normal);
}

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

.response-question {
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--primary);
}

.response-answer {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.response-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}
.learn-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-card {
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}
.knowledge-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card.large {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    text-align: left;
}

.stat-icon {
    font-size: 32px;
}

.stat-content {
    flex: 1;
}
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: var(--transition-normal);
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.category-card h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.category-card p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.category-count {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    padding: 6px 12px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-full);
    display: inline-block;
}
.facts-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.fact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
}

.fact-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.fact-content {
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.5;
}

.fact-date {
    font-size: 12px;
    color: var(--text-muted);
}
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.settings-card h3 {
    font-size: 18px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.setting-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition-normal);
    border-radius: 50%;
}

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

input:checked + .slider:before {
    transform: translateX(24px);
}

.setting-info {
    flex: 1;
}

.setting-info strong {
    display: block;
    margin-bottom: 4px;
}

.setting-info p {
    font-size: 13px;
    color: var(--text-secondary);
}
.theme-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.theme-option {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
}

.theme-option.active {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.theme-preview {
    width: 100%;
    height: 40px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}

.theme-preview.dark {
    background: linear-gradient(135deg, #0a0a0f, #0f1420);
}

.theme-preview.light {
    background: linear-gradient(135deg, #ffffff, #f3f4f6);
}

.theme-preview.purple {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.theme-preview.blue {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}
.about-info p {
    margin-bottom: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
}

.about-info strong {
    color: var(--text-secondary);
    min-width: 120px;
    display: inline-block;
}

.about-info a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-normal);
}

.about-info a:hover {
    text-decoration: underline;
}
.ai-mobile-menu {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    padding: 12px;
    z-index: 1000;
}

.mobile-menu-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 10px;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    font-size: 12px;
}

.mobile-menu-btn.active {
    color: var(--primary);
}

.mobile-menu-btn i {
    font-size: 18px;
}
@media (max-width: 1200px) {
    .ai-sidebar {
        width: 240px;
    }
    
    .ai-main {
        margin-left: 240px;
    }
    
    .ai-learn-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .knowledge-stats,
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .ai-sidebar {
        display: none;
    }
    
    .ai-main {
        margin-left: 0;
        padding: 20px 16px 80px;
    }
    
    .ai-mobile-menu {
        display: flex;
    }
    
    .ai-chat-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .ai-chat-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .knowledge-stats,
    .categories-grid,
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .theme-selector {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .quick-questions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .message {
        max-width: 90%;
    }
}

@media (max-width: 480px) {
    .ai-page-header h2 {
        font-size: 24px;
    }
    
    .ai-btn {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .theme-selector {
        grid-template-columns: repeat(2, 1fr);
    }
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
}
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 14px;
}
.ai-btn,
.quick-question,
.ai-input-btn,
.ai-nav-item,
.mobile-menu-btn {
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(102, 126, 234, 0); }
    100% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0); }
}

.pulse {
    animation: pulse 2s infinite;
}