.chat-wrapper{max-width:860px;margin:0 auto;padding:24px 20px 60px;min-height:100vh;display:flex;flex-direction:column;gap:20px}.chat-header-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-top:8px}.chat-header h1{margin:0 0 4px;font-size:clamp(22px,4vw,32px);font-weight:800;background:linear-gradient(135deg,#fff,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.chat-header p{margin:0;color:var(--text-muted);font-size:14px}.chat-container{display:flex;flex-direction:column;gap:0;overflow:hidden;padding:0;flex:1}.messages{flex:1;min-height:380px;max-height:55vh;overflow-y:auto;padding:24px 20px;display:flex;flex-direction:column;gap:16px;scroll-behavior:smooth}.messages::-webkit-scrollbar{width:4px}.messages::-webkit-scrollbar-track{background:transparent}.messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.message{display:flex}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.message.system{justify-content:center}.bubble{max-width:82%;padding:12px 16px;border-radius:16px;font-size:14px;line-height:1.7;font-family:Sarabun,sans-serif}.message.user .bubble{background:linear-gradient(135deg,#7c3aed,#4f46e5);color:#fff;border-bottom-right-radius:4px}.message.assistant .bubble{background:#ffffff12;border:1px solid rgba(255,255,255,.1);color:var(--text);border-bottom-left-radius:4px;width:100%;max-width:100%}.message.system .bubble{background:#7c3aed1f;border:1px solid rgba(124,58,237,.25);color:var(--text-muted);font-size:13px;text-align:center;border-radius:12px}@keyframes pulse-opacity{0%,to{opacity:.5}50%{opacity:1}}.thinking{animation:pulse-opacity 1.2s ease-in-out infinite}.answer-header{font-size:13px;color:#a78bfa;font-weight:600;margin-bottom:10px}.answer-context{background:#7c3aed14;border-left:3px solid #7c3aed;border-radius:0 8px 8px 0;padding:10px 14px;margin-bottom:12px;font-size:13.5px}.answer-context blockquote{margin:6px 0 0;color:var(--text);font-style:normal;line-height:1.75}.answer-error{color:#ef4444;font-size:13.5px}.sources-details{margin-top:8px}.sources-details summary{cursor:pointer;font-size:12px;color:var(--text-muted);-webkit-user-select:none;user-select:none;padding:4px 0}.sources-details summary:hover{color:var(--text)}.sources-list{display:flex;flex-direction:column;gap:10px;margin-top:10px}.source-item{background:#ffffff0a;border:1px solid var(--border);border-radius:8px;padding:10px 12px}.source-header{display:flex;align-items:center;gap:10px;margin-bottom:6px}.source-rank{font-weight:700;font-size:12px;color:#a78bfa}.source-sim{font-size:11px;color:#10b981;background:#10b9811f;padding:1px 8px;border-radius:20px}.source-text{font-size:12.5px;color:var(--text-muted);line-height:1.65}.chat-input-area{padding:16px 20px;border-top:1px solid var(--border);background:#ffffff08}.chat-input-row{display:flex;gap:10px;align-items:flex-end}#chat-input{flex:1;resize:none;background:#ffffff12;border:1px solid var(--border);border-radius:12px;color:var(--text);font-family:Sarabun,sans-serif;font-size:14px;padding:10px 14px;outline:none;transition:border-color .2s;line-height:1.5;max-height:120px;overflow-y:auto}#chat-input:focus{border-color:#7c3aed}#chat-input::placeholder{color:var(--text-muted)}.send-btn{width:42px;height:42px;min-width:42px;border-radius:12px;background:linear-gradient(135deg,#7c3aed,#4f46e5);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;transition:opacity .2s,transform .1s}.send-btn:hover:not(:disabled){opacity:.85;transform:scale(1.04)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.chat-meta-row{display:flex;align-items:center;justify-content:space-between;margin-top:8px;flex-wrap:wrap;gap:6px}