:root{
  --ink:#14110d; --paper:#f6f3ec; --paper-2:#efeae0; --card:#fffdf8;
  --line:#d9d2c4; --muted:#6f6657; --accent:#1f5c4d; --accent-2:#c2410c;
  --good:#1f5c4d; --shadow:0 1px 2px rgba(20,17,13,.05), 0 8px 28px rgba(20,17,13,.07);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,sans-serif;color:var(--ink);background:var(--paper);height:100vh;display:flex;flex-direction:column;overflow:hidden}
.serif,h1{font-family:'Lora',Georgia,serif}
.mono{font-family:'JetBrains Mono',monospace}

/* topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:13px 22px;border-bottom:1px solid var(--line);background:rgba(246,243,236,.9);backdrop-filter:blur(8px)}
.brand{display:flex;align-items:center;gap:10px;font-family:'Lora',serif;font-weight:700;font-size:19px}
.mark{width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:15px;box-shadow:var(--shadow)}
.brand .ai{font-weight:400;color:var(--muted);font-size:14px}
.status{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:7px;font-weight:500}
.sdot{width:8px;height:8px;border-radius:50%;background:#c9a227;box-shadow:0 0 0 3px rgba(201,162,39,.18)}
.status.ok .sdot{background:var(--good);box-shadow:0 0 0 3px rgba(31,92,77,.18)}
.status.err .sdot{background:#b3402c;box-shadow:0 0 0 3px rgba(179,64,44,.18)}

/* layout */
.layout{flex:1;display:grid;grid-template-columns:300px 1fr;overflow:hidden}
@media(max-width:760px){.layout{grid-template-columns:1fr}.side{display:none}}

/* side */
.side{border-right:1px solid var(--line);padding:18px;display:flex;flex-direction:column;gap:14px;background:var(--paper-2);overflow-y:auto}
.side-h{font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--muted)}
.drop{border:1.5px dashed var(--line);border-radius:14px;padding:22px 14px;text-align:center;cursor:pointer;background:var(--card);transition:.15s;display:block}
.drop:hover,.drop.over{border-color:var(--accent);background:#f0f5f2}
.drop-icon{font-size:22px;color:var(--accent)}
.drop-t{font-size:13.5px;font-weight:600;margin-top:6px}
.drop-s{font-size:11.5px;color:var(--muted);margin-top:2px}
.doclist{display:flex;flex-direction:column;gap:8px;flex:1;min-height:40px}
.empty{font-size:12.5px;color:var(--muted);font-style:italic;padding:8px 2px;line-height:1.5}
.doc{display:flex;align-items:center;gap:9px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:9px 11px;font-size:13px}
.doc .di{font-size:15px}
.doc .dn{flex:1;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc .dc{font-size:11px;color:var(--muted);font-family:'JetBrains Mono'}
.doc.bad{border-color:#e3b7ab;background:#fbf0ed}
.doc.bad .dc{color:#b3402c}
.reset{background:transparent;border:1px solid var(--line);border-radius:9px;padding:8px;font-size:12.5px;color:var(--muted);cursor:pointer;font-weight:500}
.reset:hover{border-color:var(--accent-2);color:var(--accent-2)}
.side-foot{border-top:1px solid var(--line);padding-top:12px}
.toggle{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500;cursor:pointer}
.toggle input{width:16px;height:16px;accent-color:var(--accent)}

/* main */
.main{display:flex;flex-direction:column;overflow:hidden}
.answers{flex:1;overflow-y:auto;padding:26px;display:flex;flex-direction:column;gap:18px}

.welcome{margin:auto;text-align:center;max-width:520px;padding:30px 0}
.welcome-mark{width:60px;height:60px;border-radius:16px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:28px;margin:0 auto 18px;box-shadow:var(--shadow)}
.welcome h1{font-size:30px;font-weight:700;letter-spacing:-.01em}
.welcome p{color:var(--muted);font-size:16px;margin-top:10px}
.examples{display:flex;flex-direction:column;gap:9px;margin-top:24px}
.ex{background:var(--card);border:1px solid var(--line);border-radius:11px;padding:12px 16px;font-size:14px;color:var(--ink);cursor:pointer;text-align:left;transition:.15s;font-family:inherit}
.ex:hover{border-color:var(--accent);transform:translateX(3px)}

/* qa item */
.qa{display:flex;flex-direction:column;gap:10px;max-width:760px;width:100%;margin:0 auto;animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.q{align-self:flex-end;max-width:85%;background:var(--ink);color:#f6f3ec;padding:11px 16px;border-radius:14px 14px 4px 14px;font-size:15px;line-height:1.5}
.a{align-self:flex-start;max-width:92%;background:var(--card);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:4px 14px 14px 14px;padding:15px 18px;box-shadow:var(--shadow)}
.a .meta{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--accent);font-weight:600;margin-bottom:7px;font-family:'JetBrains Mono'}
.a .txt{font-size:16px;line-height:1.6;font-weight:500;white-space:pre-wrap}
.a .txt.streaming::after{content:"▋";color:var(--accent);animation:blink 1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
.a .src{margin-top:11px;padding-top:10px;border-top:1px dashed var(--line);display:flex;flex-wrap:wrap;gap:7px}
.src .chip{font-size:11.5px;background:var(--paper-2);border:1px solid var(--line);border-radius:7px;padding:3px 9px;color:var(--muted);text-decoration:none;display:inline-flex;gap:5px;align-items:center}
.src a.chip:hover{border-color:var(--accent);color:var(--accent)}

/* composer */
.composer{display:flex;align-items:flex-end;gap:10px;padding:14px 22px 6px;border-top:1px solid var(--line);background:var(--paper)}
.mic{width:46px;height:46px;border-radius:12px;border:1px solid var(--line);background:var(--card);cursor:pointer;flex-shrink:0;transition:.15s;display:grid;place-items:center;color:var(--ink)}
.mic:hover{border-color:var(--accent);color:var(--accent)}
.mic.rec{background:#fbe9e4;border-color:var(--accent-2);color:var(--accent-2);animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(194,65,12,.4)}50%{box-shadow:0 0 0 8px rgba(194,65,12,0)}}
#qInput{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:13px 15px;font-family:inherit;font-size:15px;background:var(--card);max-height:140px;line-height:1.5}
#qInput:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(31,92,77,.1)}
.send{background:var(--accent);color:#fff;border:none;border-radius:12px;padding:0 22px;height:46px;font-weight:600;font-size:15px;cursor:pointer;flex-shrink:0;transition:.15s}
.send:hover{transform:translateY(-1px)}
.send:disabled{opacity:.5;cursor:default;transform:none}
.hint{text-align:center;font-size:11.5px;color:var(--muted);padding:4px 0 12px}