:root{--color-primary: #2196F3;--color-primary-dark: #1565C0;--color-primary-light: #64B5F6;--color-accent: #E53935;--color-bg: #EAF4FD;--color-surface: #FFFFFF;--color-user-bubble: #2196F3;--color-bot-bubble: #FFFFFF;--color-border: #D6E4F0;--color-avatar-bot: #B0BEC5;--color-text-primary: #1A2B3C;--color-text-secondary: #546E7A;--color-text-muted: #90A4AE;--color-text-on-primary:#FFFFFF;--color-error: #EF5350;--color-navy: #1A2B3C;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-pill: 999px;--font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;--shadow-sm: 0 1px 4px rgba(0,0,0,.07);--shadow-md: 0 4px 20px rgba(33, 150, 243, .13);--shadow-lg: 0 8px 40px rgba(33, 150, 243, .18);--transition: .22s ease;--transition-slow: .4s cubic-bezier(.25, .46, .45, .94)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;width:100%}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text-primary);line-height:1.55;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;height:100%;width:100%;background:var(--color-bg);animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--color-primary);flex-shrink:0;box-shadow:0 2px 10px #2196f34d}.header__brand{display:flex;align-items:center;gap:10px}.header__logo{height:32px;width:auto;object-fit:contain;filter:brightness(0) invert(1)}.header__title{font-size:16px;font-weight:600;color:var(--color-text-on-primary)}.header__logout-btn{background:#ffffff26;border:1px solid rgba(255,255,255,.3);color:var(--color-text-on-primary);padding:6px 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:500;cursor:pointer;transition:background var(--transition),transform var(--transition)}.header__logout-btn:hover:not(:disabled){background:#ffffff45;transform:translate(-2px)}.header__logout-btn:disabled{opacity:.5;cursor:not-allowed}.message-list{flex:1;overflow-y:auto;padding:24px 32px;display:flex;flex-direction:column;gap:16px;scroll-behavior:smooth;background:var(--color-bg)}.message-list::-webkit-scrollbar{width:5px}.message-list::-webkit-scrollbar-track{background:transparent}.message-list::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-pill)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;pointer-events:none;-webkit-user-select:none;user-select:none;padding:40px 20px;text-align:center;animation:fadeIn .5s ease}.empty-state__icon{font-size:40px;opacity:.4}.empty-state__title{font-size:15px;font-weight:600;color:var(--color-text-secondary)}.empty-state__body{font-size:13px;color:var(--color-text-muted)}.message-row{display:flex;align-items:flex-start;gap:10px;animation:slideUp .25s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-row--user{flex-direction:row-reverse}.message-row--bot{flex-direction:row}.message-avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0;margin-top:2px}.message-avatar--bot{background:var(--color-avatar-bot)}.message-avatar--user{background:var(--color-primary-dark)}.message-bubble{max-width:65%;padding:12px 16px;border-radius:var(--radius-lg);font-size:14px;line-height:1.65;word-break:break-word;white-space:pre-wrap;transition:box-shadow var(--transition)}.message-bubble--user{background:var(--color-user-bubble);color:var(--color-text-on-primary);box-shadow:0 2px 10px #2196f340}.message-bubble--bot{background:var(--color-bot-bubble);color:var(--color-text-primary);border:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.typing-indicator{display:flex;align-items:center;gap:4px;padding:12px 16px;background:var(--color-bot-bubble);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:fit-content;box-shadow:var(--shadow-sm)}.typing-indicator__dot{width:7px;height:7px;border-radius:50%;background:var(--color-primary-light);animation:typing-bounce 1.2s ease-in-out infinite}.typing-indicator__dot:nth-child(2){animation-delay:.2s}.typing-indicator__dot:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,80%,to{transform:translateY(0);opacity:.5}40%{transform:translateY(-6px);opacity:1}}.error-banner{display:flex;align-items:center;gap:8px;padding:8px 24px;background:#ffebee;border-top:2px solid var(--color-error);color:var(--color-error);font-size:13px;flex-shrink:0;animation:slideUp .2s ease}.error-banner__dismiss{margin-left:auto;background:none;border:none;color:var(--color-error);cursor:pointer;font-size:16px;line-height:1;padding:0 4px;transition:transform var(--transition)}.error-banner__dismiss:hover{transform:scale(1.2)}.input-bar{padding:16px 32px 20px;background:var(--color-bg);flex-shrink:0}.input-bar__field{display:flex;align-items:flex-end;gap:8px;background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-md);padding:8px 10px 8px 14px;transition:border-color var(--transition),box-shadow var(--transition)}.input-bar__field:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 3px #2196f31f}.input-bar__textarea{flex:1;resize:none;border:none;padding:4px 0;font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--color-text-primary);background:transparent;outline:none;max-height:120px;overflow-y:auto}.input-bar__textarea::placeholder{color:var(--color-text-muted)}.input-bar__textarea:disabled{opacity:.55;cursor:not-allowed}.input-bar__send-btn{width:36px;height:36px;border-radius:50%;background:var(--color-primary);border:none;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:background var(--transition),transform var(--transition),box-shadow var(--transition);box-shadow:0 2px 8px #2196f34d}.input-bar__send-btn:hover:not(:disabled){background:var(--color-primary-dark);transform:scale(1.08);box-shadow:0 4px 14px #2196f366}.input-bar__send-btn:disabled{background:#b0bec5;cursor:not-allowed;box-shadow:none}.input-bar__send-btn svg{width:18px;height:18px}.landing{display:flex;flex-direction:column;min-height:100vh;background:#f4f6f9;animation:fadeIn .4s ease}.landing__topbar{background:#fff;border-bottom:1px solid #e2e8f0;padding:12px 0;box-shadow:0 1px 6px #0000000d}.landing__topbar-inner{max-width:1100px;margin:0 auto;padding:0 28px;display:flex;align-items:center;gap:14px}.landing__logo{height:48px;width:auto;object-fit:contain}.landing__nav{background:var(--color-navy);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px #0000002e}.landing__nav-inner{max-width:1100px;margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;height:50px}.landing__nav-links{list-style:none;display:flex;gap:2px}.landing__nav-link{color:#ffffffc7;text-decoration:none;font-size:13px;font-weight:500;padding:6px 15px;border-radius:3px;transition:background var(--transition),color var(--transition);letter-spacing:.02em}.landing__nav-link:hover{background:#ffffff1a;color:#fff}.landing__nav-ask-ai{background:var(--color-accent);color:#fff;text-decoration:none;font-size:13px;font-weight:700;padding:7px 22px;border-radius:4px;letter-spacing:.04em;transition:background var(--transition),transform var(--transition),box-shadow var(--transition);box-shadow:0 2px 8px #e5393559}.landing__nav-ask-ai:hover{background:#c62828;transform:translateY(-1px);box-shadow:0 4px 14px #e5393573}.landing__hero{background:linear-gradient(135deg,#c8e6ff,#deeffe,#eaf4fd 80%,#d4e9fa);padding:80px 28px 90px;display:flex;align-items:center;justify-content:center;gap:60px;overflow:hidden;position:relative}.landing__hero:before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(33,150,243,.09) 0%,transparent 70%);top:-120px;right:-60px;pointer-events:none}.landing__hero-content{max-width:560px;animation:heroSlideIn .6s cubic-bezier(.25,.46,.45,.94)}@keyframes heroSlideIn{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.landing__hero-badge{display:inline-block;background:#2196f31f;color:var(--color-primary-dark);border:1px solid rgba(33,150,243,.25);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 14px;border-radius:var(--radius-pill);margin-bottom:18px}.landing__hero-title{font-size:clamp(30px,4vw,46px);font-weight:800;color:var(--color-navy);line-height:1.2;margin-bottom:20px;letter-spacing:-.02em}.landing__hero-title em{font-style:italic;color:var(--color-primary);background:linear-gradient(90deg,var(--color-primary),var(--color-primary-dark));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.landing__hero-subtitle{font-size:16px;color:var(--color-text-secondary);line-height:1.7;margin-bottom:38px}.landing__hero-cta{display:inline-flex;align-items:center;gap:10px;background:var(--color-primary);color:#fff;text-decoration:none;font-size:16px;font-weight:700;padding:15px 36px;border-radius:8px;transition:background var(--transition),transform var(--transition),box-shadow var(--transition);box-shadow:0 6px 24px #2196f366;letter-spacing:.01em}.landing__hero-cta:hover{background:var(--color-primary-dark);transform:translateY(-3px);box-shadow:0 10px 32px #2196f380}.landing__hero-cta:active{transform:translateY(-1px)}.landing__hero-illustration{display:flex;flex-direction:column;gap:16px;animation:heroSlideInRight .7s cubic-bezier(.25,.46,.45,.94)}@keyframes heroSlideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}.landing__hero-card{background:#fff;border-radius:12px;padding:16px 20px;width:240px;box-shadow:0 8px 30px #2196f31f;display:flex;flex-direction:column;gap:10px;border:1px solid rgba(33,150,243,.1)}.landing__hero-card--offset{margin-left:32px}.landing__hero-card-dot{width:28px;height:28px;border-radius:50%;background:#e8f5e9}.landing__hero-card-dot--blue{background:#2196f326}.landing__hero-card-line{height:8px;border-radius:var(--radius-pill);background:#eef2f7}.landing__hero-card-line--long{width:100%}.landing__hero-card-line--med{width:80%}.landing__hero-card-line--short{width:55%}.landing__products{background:#fff;padding:56px 28px;border-top:1px solid #e2e8f0;border-bottom:1px solid #e2e8f0}.landing__products-title{text-align:center;font-size:22px;font-weight:700;color:var(--color-navy);margin-bottom:36px;letter-spacing:-.01em}.landing__products-inner{max-width:1000px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:center;gap:28px}.landing__product-card{display:flex;flex-direction:column;align-items:center;gap:12px;text-decoration:none;width:110px;transition:transform var(--transition)}.landing__product-card:hover{transform:translateY(-6px)}.landing__product-card:hover .landing__product-icon{box-shadow:0 8px 24px #e5393566}.landing__product-icon{width:72px;height:72px;border-radius:50%;background:var(--color-accent);display:flex;align-items:center;justify-content:center;color:#fff;padding:14px;box-shadow:0 4px 14px #e5393547;transition:box-shadow var(--transition)}.landing__product-icon svg{width:100%;height:100%}.landing__product-label{font-size:12px;font-weight:600;color:var(--color-navy);text-align:center;line-height:1.35}.landing__footer{margin-top:auto;background:var(--color-navy);color:#ffffff80;font-size:13px;padding:20px 28px;text-align:center}@media (max-width: 820px){.landing__hero{flex-direction:column;padding:52px 20px 60px;gap:36px;text-align:center}.landing__hero-illustration{display:none}.landing__hero-badge{margin:0 auto 18px}}@media (max-width: 600px){.landing__nav-links{display:none}.landing__products-inner{gap:18px}.landing__product-card{width:82px}.landing__product-icon{width:58px;height:58px;padding:11px}.message-list{padding:16px}.input-bar{padding:12px 16px 16px}.message-bubble{max-width:84%}.header{padding:0 16px}}