:root{color-scheme:dark;--bg:#090b10;--panel:#151923;--line:#2a303d;--text:#f5f7fb;--muted:#9ba4b5;--red:#dc263c}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 85% 10%,#2b1720 0,transparent 28%),var(--bg);color:var(--text);font:18px/1.5 system-ui,-apple-system,"PingFang SC",sans-serif;min-height:100vh}header{height:92px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:0 4vw;background:rgba(9,11,16,.9);backdrop-filter:blur(14px)}header a{color:var(--text);text-decoration:none;background:#1a1f29;padding:12px 18px;border-radius:14px}header div{display:flex;flex-direction:column}header strong{font-size:25px}header small{color:var(--muted)}header span{margin-left:auto;color:var(--muted)}header span.ok{color:#63d995}main{max-width:1400px;margin:auto;padding:28px 4vw 150px}nav{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}button{font:inherit;color:inherit;border:1px solid var(--line);background:#171b24;border-radius:16px;padding:16px;cursor:pointer}nav button.active,.send,dialog button{background:var(--red);border-color:var(--red);font-weight:700}.notice{margin:20px 0;color:#e7cf91;background:#2a2518;border:1px solid #5b4c26;padding:15px 20px;border-radius:14px}.messages{display:flex;flex-direction:column;gap:18px}.messages article{max-width:84%;border:1px solid var(--line);background:var(--panel);padding:18px 22px;border-radius:20px}.messages article.user{align-self:flex-end;background:#29202a}.messages b{font-size:14px;color:var(--muted)}.messages p{margin:6px 0;white-space:pre-wrap}.sources{display:grid;gap:8px;margin-top:14px}.sources a{color:#9ec4ff;text-decoration:none;font-size:15px}#chatForm{position:fixed;z-index:5;left:50%;bottom:22px;transform:translateX(-50%);width:min(92%,1400px);display:grid;grid-template-columns:1fr 70px 110px;gap:10px;background:#11151d;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:0 14px 50px #0008}textarea,input{font:inherit;color:var(--text);background:#0d1016;border:1px solid var(--line);border-radius:14px;padding:14px;resize:none}.voice.listening{background:#8c2130}dialog{color:var(--text);background:#151923;border:1px solid var(--line);border-radius:22px;max-width:520px;padding:28px}dialog::backdrop{background:#000b}dialog form{display:grid;gap:16px}dialog h2,dialog p{margin:0}@media(max-width:800px){nav{grid-template-columns:1fr 1fr}.messages article{max-width:96%}#chatForm{grid-template-columns:1fr 58px 82px}body{font-size:16px}}