:root{--bg:#f5f6f8;--panel:#ffffff;--border:#e2e5ea;--text:#1f2329;--muted:#6b7280;--user:#2563eb;--user-text:#ffffff;--assistant:#f1f3f6;--error-bg:#fdecec;--error-text:#b42318}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Kaku Gothic ProN,Noto Sans JP,Meiryo,sans-serif;line-height:1.6}.page{max-width:1116px;margin:0 auto;padding:24px 16px 40px;min-height:100vh;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;margin:0 0 6px}.brand .logo{height:60px;width:auto;flex:none}.header h1{font-size:28px;font-weight:800;letter-spacing:-.01em;margin:0;background:linear-gradient(90deg,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block}.header p{margin:0 0 16px;color:var(--muted);font-size:13px}.layout{display:flex;gap:16px;align-items:flex-start;flex:1 1}.notice{width:280px;flex:none;padding:14px 16px;border:1px solid #e6a4a0;border-left:4px solid #c0271b;background:#fdecec;color:#c0271b;font-size:13px;font-weight:700;line-height:1.7;border-radius:8px}.notice-title{font-size:14px;margin-bottom:8px}.notice p{margin:0 0 10px}.notice p:last-child{margin-bottom:0}.chat{flex:1 1;align-self:stretch;flex-direction:column;border:1px solid var(--border);border-radius:12px;overflow:hidden}.chat,.chat-toolbar{display:flex;background:var(--panel)}.chat-toolbar{justify-content:flex-end;padding:8px 12px;border-bottom:1px solid var(--border)}.clear{border:1px solid var(--border);background:#fff;color:var(--muted);font-size:12px;padding:5px 12px;border-radius:6px;cursor:pointer}.clear:hover:not(:disabled){background:var(--assistant);color:var(--text)}.clear:disabled{opacity:.45;cursor:not-allowed}.messages{flex:1 1;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:14px;min-height:360px}.empty{color:var(--muted);text-align:center;margin:auto;font-size:14px}.message{display:flex}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.bubble{max-width:88%;padding:10px 14px;border-radius:12px;font-size:14px}.message.user .bubble{background:var(--user);color:var(--user-text);border-bottom-right-radius:4px}.message.assistant .bubble{background:var(--assistant);color:var(--text);border-bottom-left-radius:4px}.content{white-space:pre-wrap;word-break:break-word}.sources{margin-top:10px;padding-top:10px;border-top:1px dashed #c9cdd4}.sources-title{font-size:12px;font-weight:700;color:var(--muted);margin-bottom:6px}.sources ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.source-item{font-size:12px}.source-name{font-weight:600}.source-url{color:var(--user);word-break:break-all}.source-path{color:var(--muted)}.error{margin:0 16px;padding:10px 14px;background:var(--error-bg);color:var(--error-text);font-size:13px;border-radius:8px}.composer{display:flex;gap:8px;padding:12px 16px;border-top:1px solid var(--border);background:var(--panel)}.input{flex:1 1;resize:none;border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px;font-family:inherit;outline:none}.input:focus{border-color:var(--user)}.send{align-self:flex-end;border:none;background:var(--user);color:var(--user-text);font-size:14px;font-weight:600;padding:10px 18px;border-radius:8px;cursor:pointer;white-space:nowrap}.send:disabled{opacity:.5;cursor:not-allowed}.loading{display:flex;align-items:center;gap:6px}.loading .dot{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s ease-in-out infinite both}.loading .dot:nth-child(2){animation-delay:.2s}.loading .dot:nth-child(3){animation-delay:.4s}.loading-text{font-size:13px;color:var(--muted);margin-left:4px}@keyframes blink{0%,80%,to{opacity:.2}40%{opacity:1}}