:root{--bg:#f3efe6;--bg-accent:#e7f0ea;--ink:#1c2a22;--muted:#5c6b62;--line:#c9d5cc;--accent:#1f6b4a;--accent-soft:#d8ebe1;--danger:#9b2c2c;--warn:#8a6d1f;--card:#fffdf8;--shadow:0 10px 30px rgba(28,42,34,0.08);--font-display:"Segoe UI","Trebuchet MS",sans-serif;--font-body:"Segoe UI","Helvetica Neue",sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%;color:var(--ink);font-family:var(--font-body);background:radial-gradient(circle at 10% 0,#dff0e6 0,transparent 40%),radial-gradient(circle at 90% 10%,#f7e8d4 0,transparent 35%),linear-gradient(180deg,var(--bg) 0,var(--bg-accent) 100%)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.shell{min-height:100vh;display:flex;flex-direction:column}.shell-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.5rem;border-bottom:1px solid var(--line);background:rgba(255,253,248,.85);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:-webkit-sticky;position:sticky;top:0;z-index:10}.brand{font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--ink);text-decoration:none}.shell-nav{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.shell-main{width:min(960px,100%);margin:0 auto;padding:1.5rem;flex:1 1}.page-loading{min-height:60vh;display:grid;place-items:center;color:var(--muted)}.auth-page{min-height:100vh;display:grid;place-items:center;padding:1.5rem}.auth-panel{width:min(420px,100%);background:var(--card);border:1px solid var(--line);border-radius:16px;padding:2rem;box-shadow:var(--shadow)}.auth-panel h1{margin:0 0 .35rem;font-family:var(--font-display);font-size:1.75rem}.auth-panel p.lead{margin:0 0 1.5rem;color:var(--muted)}.form{grid-gap:.85rem;gap:.85rem}.form,label{display:grid}label{grid-gap:.35rem;gap:.35rem;font-size:.9rem}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:.7rem .85rem;font:inherit;background:#fff}textarea{min-height:96px;resize:vertical}.btn{border:none;border-radius:10px;padding:.7rem 1rem;font:inherit;cursor:pointer;background:var(--accent);color:#fff}.btn:disabled{opacity:.6;cursor:not-allowed}.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}.btn.secondary{background:var(--accent-soft);color:var(--accent)}.muted{color:var(--muted)}.error,.muted{font-size:.9rem}.error{color:var(--danger)}.stack{display:grid;grid-gap:1rem;gap:1rem}.row{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center}.book-list{list-style:none;margin:0;padding:0;display:grid;grid-gap:.75rem;gap:.75rem}.book-item{display:flex;justify-content:space-between;gap:1rem;padding:1rem;background:var(--card);border:1px solid var(--line);border-radius:12px}.badge,.book-item{align-items:center}.badge{display:inline-flex;padding:.2rem .55rem;border-radius:999px;font-size:.75rem;background:var(--accent-soft);color:var(--accent)}.badge.ready{background:#d9f2e4;color:#146c43}.badge.failed{background:#f8d7da;color:var(--danger)}.badge.indexing,.badge.parsing,.badge.processing,.badge.uploaded{background:#fff3cd;color:var(--warn)}.chat{display:grid;grid-gap:.75rem;gap:.75rem;margin-bottom:1rem}.pending-sticky{position:-webkit-sticky;position:sticky;top:0;z-index:2;padding-bottom:.35rem;background:linear-gradient(to bottom,var(--bg) 70%,transparent)}.bubble{max-width:85%;padding:.85rem 1rem;border-radius:14px;white-space:pre-wrap;line-height:1.45}.bubble.user{margin-left:auto;background:var(--accent);color:#fff}.bubble.assistant{margin-right:auto}.bubble.assistant,.panel{background:var(--card);border:1px solid var(--line)}.panel{border-radius:12px;padding:1rem}.panel.warn{border-color:#e0c66c;background:#fff8e6}.panel.ok{border-color:#9ed2b5;background:#f0faf4}.sources{list-style:none;margin:.5rem 0 0;padding:0;display:grid;grid-gap:.35rem;gap:.35rem;font-size:.9rem}h1,h2{font-family:var(--font-display)}h1{margin-top:0}