:root{--primary-color: #4F46E5;--primary-hover: #4338ca;--bg-color: #f3f4f6;--chat-bg: #ffffff;--user-msg-bg: #4F46E5;--user-msg-text: #ffffff;--bot-msg-bg: #f3f4f6;--bot-msg-text: #1f2937;--border-color: #e5e7eb;--text-primary: #111827;--text-secondary: #6b7280;--danger: #ef4444}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-color);color:var(--text-primary)}.chat-container{display:flex;flex-direction:column;height:100vh;max-width:900px;margin:0 auto;background-color:var(--chat-bg);box-shadow:0 0 24px #0000000d;position:relative}.chat-header{padding:16px 24px;border-bottom:1px solid var(--border-color);background:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:sticky;top:0;z-index:10}.header-branding{display:flex;align-items:center;gap:12px}.avatar-circle{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center}.bot-avatar{background:linear-gradient(135deg,#4f46e5,#818cf8);color:#fff}.chat-header h2{font-size:1rem;font-weight:700;margin:0;color:var(--text-primary)}.status-indicator{font-size:.75rem;color:var(--text-secondary);display:flex;align-items:center;gap:6px}.status-dot{width:8px;height:8px;background-color:#10b981;border-radius:50%;display:inline-block;box-shadow:0 0 0 2px #10b98133}.messages-area{flex:1;padding:24px;overflow-y:auto;display:flex;flex-direction:column;gap:20px;background-color:#fff}.welcome-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;color:var(--text-secondary);animation:fadeIn .5s ease-out}.welcome-icon{width:64px;height:64px;background-color:#eff6ff;color:var(--primary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:16px}.welcome-state h3{font-size:1.25rem;color:var(--text-primary);margin:0 0 8px}.quick-prompts{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:24px}.quick-prompts button{background:#fff;border:1px solid var(--border-color);padding:8px 16px;border-radius:20px;color:var(--text-primary);font-size:.9rem;cursor:pointer;transition:all .2s;box-shadow:0 1px 2px #0000000d}.quick-prompts button:hover{border-color:var(--primary-color);color:var(--primary-color);transform:translateY(-1px)}.message-row{display:flex;width:100%;animation:slideUp .3s ease-out}.message-bubble{max-width:80%;padding:12px 16px;font-size:.95rem;line-height:1.6;position:relative;box-shadow:0 2px 4px #00000005}.sender-name{font-size:.7rem;font-weight:600;display:block;margin-bottom:4px;opacity:.8}.bot-label{display:flex;align-items:center;gap:4px;color:var(--primary-color)}.message-row.support{justify-content:flex-start}.message-row.support .message-bubble{background-color:var(--bot-msg-bg);color:var(--bot-msg-text);border-radius:12px 12px 12px 2px}.message-row.user{justify-content:flex-end}.message-row.user .message-bubble{background-color:var(--user-msg-bg);color:var(--user-msg-text);border-radius:12px 12px 2px}.message-row.user .sender-name{text-align:right;color:#ffffffb3}.typing-bubble{background-color:var(--bot-msg-bg);border-radius:12px 12px 12px 2px;padding:12px 20px;width:fit-content}.typing-dots span{display:inline-block;width:6px;height:6px;background-color:#a1a1aa;border-radius:50%;animation:typing 1.4s infinite ease-in-out both;margin:0 2px}.typing-dots span:nth-child(1){animation-delay:-.32s}.typing-dots span:nth-child(2){animation-delay:-.16s}.input-container{padding:24px;border-top:1px solid var(--border-color);background-color:#fff}.input-wrapper{display:flex;align-items:center;gap:12px;background:var(--bg-color);border:2px solid transparent;border-radius:16px;padding:8px 8px 8px 20px;transition:all .2s}.input-wrapper:focus-within{background:#fff;border-color:var(--primary-color);box-shadow:0 0 0 4px #4f46e51a}.input-wrapper.error-border{border-color:var(--danger)}.chat-input{flex:1;border:none;outline:none;font-size:1rem;background:transparent;color:var(--text-primary);min-height:24px}.send-button{width:42px;height:42px;background-color:var(--primary-color);color:#fff;border:none;border-radius:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.send-button:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-1px)}.send-button:disabled{background-color:#d1d5db;cursor:not-allowed}.input-footer{display:flex;justify-content:flex-end;align-items:center;gap:12px;margin-top:8px;font-size:.75rem}.limit-warning{color:var(--danger);font-weight:600}.text-red{color:var(--danger)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes typing{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}