:root{--bg: #f3eee6;--paper: #fffdf8;--ink: #1c1916;--muted: #6f675e;--line: #e4d9c8;--accent: #b2432f;--accent-dark: #8c3222;--ok: #2f6b4f;--warn: #8a5a12;--shadow: 0 20px 50px rgba(60, 42, 20, .08)}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:Hiragino Mincho ProN,Yu Mincho,Hiragino Sans,sans-serif}body{background-image:radial-gradient(circle at top left,#fff8ee,transparent 40%)}.app{display:grid;grid-template-columns:320px 1fr;min-height:100vh}.sidebar{padding:28px 22px;border-right:1px solid var(--line);background:#fffdf8b3}.eyebrow{margin:0;letter-spacing:.18em;font-size:11px;text-transform:uppercase;color:var(--accent);font-family:Hiragino Sans,sans-serif}h1{margin:8px 0 0;font-size:28px;font-weight:600}.lede,.status,.docs,button,.upload,textarea{font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,sans-serif}.lede{margin:10px 0 22px;color:var(--muted);line-height:1.6;font-size:13px}.status{padding:10px 12px;border-radius:10px;background:#efe6d6;color:var(--warn);font-size:12px;margin-bottom:20px}.status.ok{background:#e4f0e8;color:var(--ok)}.panel-head{display:flex;align-items:baseline;justify-content:space-between}.panel-head h2{margin:0;font-size:16px}.panel-head span{color:var(--muted);font-size:12px}.upload,button,.ghost{display:block;width:100%;margin-top:10px;border:0;border-radius:12px;padding:11px 12px;cursor:pointer;font-size:13px}.upload{background:var(--accent);color:#fff;text-align:center}.upload input{display:none}.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}.docs{list-style:none;padding:0;margin:16px 0 0}.docs li{display:flex;justify-content:space-between;gap:8px;padding:10px 0;border-bottom:1px solid var(--line);font-size:13px}.docs button{width:auto;margin:0;padding:4px 8px;background:transparent;color:var(--muted)}.main{display:flex;flex-direction:column;min-width:0}.messages{flex:1;overflow:auto;padding:36px 48px 16px}.empty{max-width:520px;margin:12vh auto 0;padding:28px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow)}.empty h2{margin-top:0}.empty ol{color:var(--muted);line-height:1.8}.bubble{max-width:720px;margin:0 auto 22px}.bubble .who{font-size:11px;letter-spacing:.12em;color:var(--muted);margin-bottom:8px}.bubble .body{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:16px 18px;line-height:1.75;white-space:pre-wrap}.bubble.user .body{background:var(--ink);color:#f7f1e8}.sources{display:grid;gap:8px;margin-top:10px}.source{font-size:12px;color:var(--muted);border-left:3px solid var(--accent);padding:8px 10px;background:#fffdf8cc}.composer{display:grid;grid-template-columns:1fr auto;gap:10px;padding:16px 48px 28px}textarea{resize:none;border:1px solid var(--line);border-radius:16px;padding:14px 16px;font-size:15px;background:var(--paper)}.composer button{width:auto;margin:0;padding:0 22px;border-radius:16px;background:var(--accent);color:#fff}.composer button:hover{background:var(--accent-dark)}@media(max-width:860px){.app{grid-template-columns:1fr}.messages,.composer{padding-left:18px;padding-right:18px}}