:root{--primary-color: #0056b3;--bg-color: #f4f7f6;--text-main: #333333;--text-muted: #666666;--bubble-bot-bg: #ffffff;--bubble-user-bg: var(--primary-color);--bubble-user-text: #ffffff;--border-color: #e0e0e0}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main);line-height:1.5}.error-screen,.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;font-size:1.2rem;color:var(--text-muted)}.error-card{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 12px #0000001a;text-align:center;max-width:400px}.error-card h2{color:#d32f2f;margin-bottom:1rem}.app-container{display:flex;flex-direction:column;height:100vh;max-width:1000px;margin:0 auto;background-color:#fff;box-shadow:0 0 20px #0000000d}.corporate-header{background-color:#fff;border-bottom:1px solid var(--border-color);padding:1rem 2rem}.header-content{display:flex;align-items:center;gap:1.5rem}.corporate-logo{max-height:50px;max-width:150px;object-fit:contain}.logo-placeholder{width:50px;height:50px;background-color:var(--primary-color);color:#fff;font-size:1.5rem;font-weight:700;display:flex;align-items:center;justify-content:center;border-radius:8px}.header-text h1{font-size:1.25rem;color:var(--text-main);margin-bottom:.2rem}.header-text span{font-size:.85rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.chat-container{flex:1;display:flex;flex-direction:column;overflow:hidden;background-color:#f9fbfb}.messages-area{flex:1;overflow-y:auto;padding:2rem;display:flex;flex-direction:column;gap:1.5rem}.message-wrapper{display:flex;width:100%}.message-wrapper.user{justify-content:flex-end}.message-wrapper.bot{justify-content:flex-start}.message-bubble{max-width:75%;padding:1rem 1.2rem;border-radius:12px;font-size:.95rem;box-shadow:0 2px 5px #0000000d}.message-wrapper.user .message-bubble{background-color:var(--bubble-user-bg);color:var(--bubble-user-text);border-bottom-right-radius:2px}.message-wrapper.bot .message-bubble{background-color:var(--bubble-bot-bg);border:1px solid var(--border-color);border-bottom-left-radius:2px}.message-bubble p{margin-bottom:.5rem}.message-bubble p:last-child{margin-bottom:0}.message-bubble strong{font-weight:600}.message-bubble a{color:var(--primary-color);text-decoration:none;font-weight:500}.message-bubble a:hover{text-decoration:underline}.sources-container{margin-top:1rem;padding-top:.8rem;border-top:1px solid #eee;font-size:.8rem}.sources-container ul{list-style:none;margin-top:.5rem}.input-area{padding:1.5rem 2rem;background-color:#fff;border-top:1px solid var(--border-color);display:flex;gap:1rem}.input-area input{flex:1;padding:1rem 1.2rem;border:1px solid #ccc;border-radius:8px;font-size:1rem;transition:border-color .2s;outline:none}.input-area input:focus{border-color:var(--primary-color)}.input-area button{padding:0 2rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:opacity .2s}.input-area button:hover:not(:disabled){opacity:.9}.input-area button:disabled{background-color:#ccc;cursor:not-allowed}.typing span{animation:typing 1.4s infinite both;font-size:1.5rem;line-height:.5}.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,80%,to{opacity:0}40%{opacity:1}}