@import"https://fonts.googleapis.com/css2?family=Heebo:wght@400;500;700&display=swap";:root{--brand: #5b7fb0;--brand-dark: #466493;--brand-soft: #eef1f6;--bot-bubble: #ffffff;--user-bubble: #5b7fb0;--text: #1f2430;--muted: #6b7280;--bg-gradient: #f6f7f9;--surface: rgba(255, 255, 255, .85);--surface-2: #f3f4f6;--border: #e6e8ec;--hairline: rgba(0, 0, 0, .06);--excerpt-bg: rgba(0, 0, 0, .03);--scroll-thumb: #d3d6dd;--card-shadow: rgba(15, 23, 42, .08);--accent: #5b7fb0;--accent-soft: rgba(91, 127, 176, .14);--brand-gradient: linear-gradient(135deg, #5b7fb0, #6f93c2);--glow-1: rgba(15, 23, 42, .1);--glow-2: rgba(15, 23, 42, .06)}[data-theme=dark]{--brand: #7f9cc4;--brand-dark: #9db5d6;--brand-soft: #262a31;--bot-bubble: #30343d;--text: #e6e8ec;--muted: #a3a9b5;--bg-gradient: #23262d;--surface: rgba(42, 46, 54, .85);--surface-2: #30343d;--border: #3b404a;--hairline: rgba(255, 255, 255, .06);--excerpt-bg: rgba(255, 255, 255, .05);--scroll-thumb: #4a4f5a;--card-shadow: rgba(0, 0, 0, .5);--accent: #7f9cc4;--accent-soft: rgba(127, 156, 196, .16);--brand-gradient: linear-gradient(135deg, #5e7aa5, #7f9cc4);--glow-1: rgba(0, 0, 0, .5);--glow-2: rgba(0, 0, 0, .35)}*{box-sizing:border-box}body{margin:0;font-family:Heebo,system-ui,sans-serif;background:var(--bg-gradient);min-height:100vh;color:var(--text);transition:background .3s ease,color .3s ease}.app{display:flex;flex-direction:column;height:100vh;height:100dvh}.app-body{display:flex;flex:1;min-height:0}.sidebar{width:280px;height:100%;background:var(--surface);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:0;border:none;border-inline-end:1px solid var(--border);display:flex;flex-direction:column;padding:16px;gap:12px;flex-shrink:0}.corpus-picker{display:flex;flex-direction:column;gap:4px}.corpus-picker-label{font-size:.72rem;color:var(--muted);padding-right:4px}.corpus-select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2);font-family:inherit;font-size:.92rem;color:var(--text);cursor:pointer}.corpus-select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.new-conversation{padding:12px;background:var(--brand-gradient);color:#fff;border:none;border-radius:12px;font-family:inherit;font-size:.95rem;font-weight:600;letter-spacing:.3px;cursor:pointer;box-shadow:0 4px 16px var(--card-shadow);transition:transform .15s ease,box-shadow .15s ease}.new-conversation:hover{transform:translateY(-1px);box-shadow:0 6px 22px var(--glow-2),0 4px 16px var(--card-shadow)}.conversation-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px}.conversation-item{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:10px 12px;border-radius:12px;cursor:pointer;transition:background .15s ease}.conversation-item:hover{background:var(--brand-soft)}.conversation-item.active{background:var(--brand-soft);font-weight:600;box-shadow:inset 0 0 0 1px var(--accent-soft)}.conversation-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.9rem;color:var(--text)}.delete-conversation{background:none;border:none;cursor:pointer;color:var(--muted);opacity:.8;padding:2px;display:inline-flex;align-items:center;transition:color .15s ease,opacity .15s ease}.delete-conversation:hover{opacity:1;color:#ef4444}.chat-card{flex:1;min-width:0;width:auto;max-width:none;height:100%;background:transparent;display:flex;flex-direction:column;overflow:hidden;border:none}.chat-header{display:flex;align-items:center;gap:12px;padding:14px 24px;background:var(--surface);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);color:var(--text);border-bottom:1px solid var(--border);position:relative;z-index:2}.chat-header-text{flex:1}.logout-button{background:var(--surface-2);color:var(--muted);border:1px solid var(--border);border-radius:10px;padding:7px 14px;font-family:inherit;font-size:.82rem;cursor:pointer;transition:background .15s ease,color .15s ease}.logout-button:hover{background:var(--brand-soft);color:var(--text)}.theme-toggle{width:36px;height:36px;flex-shrink:0;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;font-size:1rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s ease,transform .15s ease}.theme-toggle:hover{background:var(--brand-soft);transform:translateY(-1px)}.login-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.login-card{background:var(--surface);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:28px;box-shadow:0 20px 60px var(--card-shadow);border:1px solid var(--border);padding:48px 40px;text-align:center;max-width:380px}.login-icon{font-size:3.5rem;margin-bottom:12px}.login-card h1{margin:0 0 10px;color:var(--text);font-size:1.5rem}.login-card p{margin:0 0 24px;color:var(--muted);line-height:1.6}.login-button{width:100%;padding:13px;background:linear-gradient(135deg,var(--brand),#8b5cf6);color:#fff;border:none;border-radius:14px;font-family:inherit;font-size:1rem;font-weight:500;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease;box-shadow:0 6px 18px #6366f159}.login-button:hover{transform:translateY(-1px);box-shadow:0 8px 22px #6366f173}.chat-header-avatar{width:42px;height:42px;border-radius:50%;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:1.4rem}.chat-header-text h1{margin:0;font-size:1.2rem;font-weight:700;letter-spacing:.5px}.chat-header-text p{margin:2px 0 0;font-size:.82rem;color:var(--muted)}.message-list{flex:1;overflow-y:auto;padding:22px;display:flex;flex-direction:column;gap:16px}.message-list::-webkit-scrollbar{width:6px}.message-list::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:10px}.message-row{display:flex;align-items:flex-end;gap:8px;max-width:85%;animation:pop-in .25s ease-out}.message-row.bot{align-self:flex-start;flex-direction:row}.message-row.user{align-self:flex-end;flex-direction:row-reverse}.avatar{width:34px;height:34px;border-radius:50%;background:var(--surface-2);box-shadow:0 2px 6px #00000014;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}.bubble{padding:12px 16px;border-radius:20px;line-height:1.55;font-size:.95rem;white-space:pre-wrap;word-wrap:break-word}.message-row.bot .bubble{background:var(--bot-bubble);color:var(--text);border:1px solid var(--border);border-bottom-right-radius:6px;box-shadow:0 4px 18px #00000014}.message-row.user .bubble{background:var(--brand-gradient);color:#fff;border-bottom-left-radius:6px;box-shadow:0 4px 18px var(--glow-1)}.bubble-text.markdown{white-space:normal}.bubble-text.markdown p{margin:0 0 8px}.bubble-text.markdown p:last-child{margin-bottom:0}.bubble-text.markdown ul,.bubble-text.markdown ol{margin:6px 0;padding-inline-start:22px}.bubble-text.markdown li{margin:3px 0}.bubble-text.markdown strong{font-weight:700}.bubble-text.markdown h1,.bubble-text.markdown h2,.bubble-text.markdown h3{font-size:1rem;margin:10px 0 4px}.bubble-text.markdown code{background:#6366f11a;padding:1px 5px;border-radius:5px;font-size:.88em}.bubble-text.markdown a{color:var(--brand-dark)}.sources{margin-top:10px}.sources-toggle{display:inline-flex;align-items:center;gap:6px;background:none;border:none;padding:2px 0;cursor:pointer;font-family:inherit;font-size:.74rem;color:var(--muted)}.sources-toggle:hover{color:var(--brand-dark)}.sources-arrow{display:inline-block;font-size:.6rem;transition:transform .15s ease}.sources-arrow.open{transform:rotate(90deg)}.sources-list{margin-top:8px;display:flex;flex-direction:column;align-items:flex-start;gap:6px}.source-item{display:flex;flex-direction:column;align-items:flex-start;gap:4px;max-width:100%}.source-tag{display:inline-flex;align-items:center;gap:6px;font-size:.72rem;font-family:inherit;background:var(--brand-soft);color:var(--brand-dark);padding:3px 10px;border:none;border-radius:12px;font-weight:500;cursor:pointer;transition:filter .15s ease}.source-tag:hover{filter:brightness(.95)}.source-arrow{font-size:.6rem;transition:transform .15s ease}.source-arrow.open{transform:rotate(180deg)}.source-excerpt{margin:0;padding:8px 12px;border-inline-start:3px solid var(--brand);background:var(--excerpt-bg);border-radius:8px;font-size:.8rem;line-height:1.6;color:var(--text);white-space:pre-wrap;max-height:220px;overflow-y:auto}.source-excerpt mark{background:#fff3a3;color:#3a2f00;border-radius:3px;padding:0 1px}.bubble.typing{display:flex;gap:5px;align-items:center}.dot{width:8px;height:8px;border-radius:50%;background:var(--brand);opacity:.5;animation:bounce 1.2s infinite ease-in-out}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}.empty-state{margin:auto;text-align:center;color:var(--muted);padding:20px}.empty-icon{font-size:3rem;margin-bottom:8px}.empty-state h2{margin:8px 0;color:var(--text);font-size:1.4rem}.empty-state p{margin:4px 0;font-size:.95rem}.empty-hint{color:var(--brand);font-weight:500}.input-row{display:flex;gap:10px;padding:16px 20px;background:var(--surface);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--border)}.input{flex:1;resize:none;padding:12px 16px;border:1px solid var(--border);border-radius:16px;font-family:inherit;font-size:.95rem;background:var(--surface-2);color:var(--text);max-height:120px}.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.send-button{width:48px;height:48px;flex-shrink:0;background:var(--brand-gradient);color:#fff;border:none;border-radius:14px;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .15s ease,box-shadow .15s ease;box-shadow:0 4px 16px var(--glow-1);transform:scaleX(-1)}.send-button:hover:not(:disabled){transform:scaleX(-1) scale(1.08);box-shadow:0 6px 22px var(--glow-2),0 4px 16px var(--glow-1)}.send-button:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}@keyframes pop-in{0%{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes bounce{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-6px);opacity:1}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;background:#00000073;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);animation:fade-in .15s ease}.modal{width:100%;max-width:360px;background:var(--surface-2);border:1px solid var(--border);border-radius:16px;box-shadow:0 24px 60px #0006;padding:22px 24px;text-align:center;animation:pop-in .18s ease-out}.modal-title{margin:0 0 8px;font-size:1.1rem;color:var(--text)}.modal-message{margin:0 0 20px;font-size:.92rem;line-height:1.6;color:var(--muted)}.modal-actions{display:flex;gap:10px;justify-content:center}.modal-btn{flex:1;padding:10px 16px;border-radius:12px;font-family:inherit;font-size:.92rem;font-weight:600;cursor:pointer;border:1px solid var(--border);transition:filter .15s ease,background .15s ease}.modal-btn.cancel{background:var(--surface);color:var(--text)}.modal-btn.cancel:hover{background:var(--brand-soft)}.modal-btn.danger{background:#ef4444;color:#fff;border-color:#ef4444}.modal-btn.danger:hover{filter:brightness(.93)}.modal-btn.confirm{background:var(--brand-gradient);color:#fff;border-color:transparent}.modal-btn.confirm:hover{filter:brightness(.95)}@media (max-width: 860px){.app-body{flex-direction:column}.sidebar{width:100%;height:auto;flex-shrink:0;border-inline-end:none;border-bottom:1px solid var(--border);padding:12px;gap:10px}.conversation-list{max-height:20vh}.chat-card{width:100%;height:auto;flex:1;min-height:0}.message-row{max-width:92%}.chat-header{padding:14px 16px}.chat-header-avatar{width:40px;height:40px;font-size:1.3rem}.message-list,.input-row{padding-left:14px;padding-right:14px}}@media (max-width: 420px){.chat-header-text h1{font-size:1.05rem}.conversation-list{max-height:16vh}}