@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{--bg-main: #FFFFFF;--bg-soft: #F9FAFB;--bg-input: #FFFFFF;--bg-user-msg: #3730A3;--bg-ai-msg: #F3F4F6;--text-primary: #111827;--text-secondary: #4B5563;--text-on-primary: #FFFFFF;--border-color: #E5E7EB;--accent-gradient: linear-gradient(90deg, #4F46E5 0%, #7C3AED 100%);--accent-gradient-hover: linear-gradient(90deg, #4338CA 0%, #6D28D9 100%);--accent-color-start: #4F46E5;--shadow-color-light: rgba(79, 70, 229, .1);--shadow-color-medium: rgba(79, 70, 229, .2)}.dark-mode{--bg-main: #111827;--bg-soft: #1F2937;--bg-input: #374151;--bg-user-msg: #4F46E5;--bg-ai-msg: #374151;--text-primary: #F9FAFB;--text-secondary: #9CA3AF;--border-color: #374151;--accent-gradient: linear-gradient(90deg, #6366F1 0%, #A78BFA 100%);--accent-gradient-hover: linear-gradient(90deg, #4F46E5 0%, #8B5CF6 100%);--accent-color-start: #6366F1}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,sans-serif;background-color:var(--bg-main);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{min-height:auto}.navbar{height:72px;padding:0 5%;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color);background-color:var(--bg-main);position:relative;z-index:100}.navbar-left,.navbar-right{display:flex;align-items:center;gap:32px}.navbar-brand{font-weight:700;font-size:22px;text-decoration:none;color:var(--text-primary)}.navbar-brand span{background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.nav-links{display:flex;gap:32px;align-items:center}.nav-link{text-decoration:none;color:var(--text-secondary);font-weight:500}.nav-buttons{display:flex;gap:12px;align-items:center}.nav-button{text-decoration:none;padding:10px 20px;border-radius:8px;font-weight:600;transition:all .2s ease;border:1px solid transparent;cursor:pointer}.nav-button-primary{background:var(--accent-gradient);color:var(--text-on-primary)}.language-switcher{font-size:16px;font-weight:500;cursor:pointer;color:var(--text-secondary);padding:6px;border-radius:6px}.language-switcher:hover{background-color:var(--bg-soft)}.language-switcher span{padding:4px;border-radius:4px}.language-switcher 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.cta-primary:hover,.cta-primary:hover{background:linear-gradient(90deg,#4338ca,#6d28d9)!important;color:#fff!important;box-shadow:0 10px 30px #4f46e580}.hero-section .cta-secondary,.cta-secondary{background:#fff!important;color:#4f46e5!important;border:2px solid #4F46E5!important;box-shadow:0 4px 15px #0000001a}.hero-section .cta-secondary:hover,.cta-secondary:hover{background:#4f46e5!important;color:#fff!important;border:2px solid #4F46E5!important;box-shadow:0 10px 25px #4f46e54d}.features-section{background-color:var(--bg-main);padding:80px 5%;max-width:1200px;margin:0 auto}.section-header{text-align:center;margin-bottom:64px}.section-header h2{font-size:clamp(2rem,4vw,2.25rem);font-weight:700;margin-bottom:16px}.section-header p{font-size:18px;color:var(--text-secondary);max-width:600px;margin:0 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var(--border-color);padding:16px;display:flex;flex-direction:column;flex-shrink:0;transition:transform .3s ease-in-out}.main-content{flex-grow:1;display:flex;flex-direction:column;height:100%;position:relative;background-color:var(--bg-main)}.sidebar-top{flex-shrink:0;border-bottom:1px solid var(--border-color);padding-bottom:16px;margin-bottom:16px}.new-chat-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px;border-radius:8px;background:var(--accent-gradient);color:var(--text-on-primary);border:none;cursor:pointer;font-size:16px;font-weight:600;transition:all .2s ease}.new-chat-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px var(--shadow-color-light)}.sidebar-role-selector{margin-top:16px}.sidebar-role-selector label{display:block;margin-bottom:8px;font-size:12px;font-weight:700;color:var(--text-secondary);text-transform:uppercase;padding:0 8px}.sidebar-role-selector select{width:100%;padding:8px 12px;border-radius:6px;border:1px 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svg{stroke:var(--text-on-primary)}.conversation-title-area{flex-grow:1;cursor:pointer;display:flex;align-items:center;gap:12px}.conversation-actions{position:absolute;right:8px;top:50%;transform:translateY(-50%);display:none;gap:4px;background-color:var(--border-color);border-radius:6px;padding:2px}.conversation-item:hover .conversation-actions{display:flex}.conversation-item.active .conversation-actions,.conversation-item.active:hover .conversation-actions{display:none}.action-btn{background:none;border:none;cursor:pointer;padding:4px;border-radius:4px;display:flex;align-items:center;justify-content:center}.action-btn:hover{background-color:var(--bg-soft)}.action-btn svg{width:16px;height:16px;stroke:var(--text-secondary)}.sidebar-footer{flex-shrink:0;margin-top:auto;border-top:1px solid var(--border-color);padding-top:16px;display:flex;flex-direction:column;gap:12px}.user-profile-link a{display:flex;align-items:center;gap:12px;text-decoration:none;padding:8px;border-radius:6px;transition:background-color .2s}.user-profile-link a:hover{background-color:var(--border-color)}.user-profile-link .avatar{width:28px;height:28px;font-size:12px}.user-profile-link span{color:var(--text-primary);font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-grow:1}#dark-mode-toggle{display:flex;align-items:center;gap:12px;cursor:pointer;font-size:14px;color:var(--text-secondary);padding:10px 8px;border-radius:6px}#dark-mode-toggle:hover{background-color:var(--border-color)}#chat-window{flex-grow:1;overflow-y:auto;padding:24px 5%;display:flex;flex-direction:column}.empty-chat-container{flex-grow:1;display:flex;align-items:center;justify-content:center;text-align:center;flex-direction:column;margin:auto;padding-bottom:10vh}.empty-chat-logo{width:60px;height:60px;padding:12px;border-radius:50%;background:var(--bg-soft);border:1px solid var(--border-color);margin-bottom:24px}.empty-chat-logo svg{stroke:var(--accent-color-start);width:100%;height:100%}.empty-chat-container h2{font-size:24px;color:var(--text-primary)}.message-wrapper{display:flex;gap:12px;margin-bottom:16px;max-width:85%;align-self:flex-start;animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-wrapper.user{align-self:flex-end}.avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;flex-shrink:0;margin-top:4px}.avatar.user-avatar{background:var(--accent-gradient);color:#fff}.avatar.ai-avatar{background:var(--bg-soft);padding:6px;border:1px solid var(--border-color)}.avatar.ai-avatar svg{stroke:var(--accent-color-start)}.message-content{max-width:100%;position:relative}.sender-name{font-weight:600;font-size:14px;margin-bottom:6px}.message-wrapper.user 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