:root{--bg:#f7f7f4;--surface:#fff;--surface-muted:#f0f3f1;--text:#1c2421;--text-muted:#65716b;--border:#d9dfdb;--accent:#0c6b58;--accent-strong:#08483c;--accent-soft:#dff1ec;--danger:#9a3412;--danger-soft:#fff1e8;--shadow:0 12px 28px #1c242114;--sans:system-ui, "Segoe UI", Roboto, "Hiragino Sans", "Yu Gothic UI", sans-serif;color:var(--text);background:var(--bg);font:16px/1.65 var(--sans);font-synthesis:none;letter-spacing:0;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input{font:inherit}button{cursor:pointer}a{color:inherit}h1,h2,p,dl,dd{margin:0}.app-shell{width:min(1120px,100% - 32px);margin:0 auto;padding:40px 0 56px}.site-header{border-bottom:1px solid var(--border);grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:24px;padding:24px 0 28px;display:grid}.eyebrow{color:var(--accent);letter-spacing:.08em;text-transform:uppercase;font-size:.78rem;font-weight:700}h1{color:var(--text);margin-top:8px;font-size:clamp(2rem,6vw,4rem);font-weight:750;line-height:1}.lead{max-width:680px;color:var(--text-muted);margin-top:16px;font-size:1.05rem}.source-panel{max-width:360px;color:var(--text-muted);flex-wrap:wrap;justify-content:flex-end;gap:8px;font-size:.88rem;display:flex}.source-panel span,.source-panel a{border:1px solid var(--border);background:var(--surface);border-radius:6px;min-height:34px;padding:5px 10px;text-decoration:none}.source-panel a{color:var(--accent-strong);font-weight:700}.controls{gap:16px;padding:22px 0;display:grid}.search-field{gap:8px;display:grid}.search-field span{color:var(--text-muted);font-size:.88rem;font-weight:700}.search-field input{border:1px solid var(--border);width:100%;min-height:48px;color:var(--text);background:var(--surface);border-radius:7px;outline:none;padding:10px 14px}.search-field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #0c6b5829}.tag-filter{flex-wrap:wrap;gap:8px;display:flex}.tag-button,.tag{border:1px solid var(--border);background:var(--surface);min-height:30px;color:var(--text-muted);border-radius:999px;padding:4px 10px;font-size:.86rem;line-height:1.4}.tag-button:hover{border-color:var(--accent);color:var(--accent-strong)}.tag-button.is-active{border-color:var(--accent);background:var(--accent);color:#fff}.result-bar{color:var(--text-muted);flex-wrap:wrap;justify-content:space-between;gap:8px;padding:12px 0 18px;font-size:.9rem;display:flex}.paper-list{gap:16px;display:grid}.paper-card,.empty-state,.status-panel{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:8px}.paper-card{gap:16px;padding:22px;display:grid}.paper-card__meta{color:var(--text-muted);flex-wrap:wrap;gap:8px 12px;font-size:.88rem;display:flex}.paper-card h2{color:var(--text);font-size:1.35rem;line-height:1.35}.paper-card__summary{color:var(--accent-strong);font-weight:700}.paper-card__explanation{color:var(--text)}.paper-card__tags{flex-wrap:wrap;gap:8px;display:flex}.tag{background:var(--accent-soft);color:var(--accent-strong);border-color:#0000}.paper-card__details{gap:10px;padding-top:2px;display:grid}.paper-card__details div{grid-template-columns:88px minmax(0,1fr);gap:12px;display:grid}.paper-card__details dt{color:var(--text-muted);text-transform:uppercase;font-size:.82rem;font-weight:800}.paper-card__details dd{color:var(--text-muted);overflow-wrap:anywhere}.paper-card__links{flex-wrap:wrap;gap:8px;display:flex}.paper-link{border:1px solid var(--border);min-height:36px;color:var(--accent-strong);background:var(--surface-muted);border-radius:6px;padding:6px 12px;font-weight:750;text-decoration:none}.paper-link:hover{border-color:var(--accent)}.paper-link--primary{border-color:var(--accent);background:var(--accent);color:#fff}.empty-state,.status-panel{padding:28px}.empty-state h2,.status-panel h1{font-size:1.5rem;line-height:1.3}.empty-state p,.status-panel p{color:var(--text-muted);margin-top:10px}.status-panel{max-width:720px;margin:80px auto}.status-panel--error{background:var(--danger-soft);border-color:#fed7aa}.status-panel--error .eyebrow,.status-panel--error h1{color:var(--danger)}.status-panel a{color:var(--accent-strong);margin-top:18px;font-weight:800;display:inline-flex}@media (width<=760px){.app-shell{width:min(100% - 24px,1120px);padding-top:20px}.site-header{grid-template-columns:1fr;align-items:start}.source-panel{justify-content:flex-start}.paper-card{padding:18px}.paper-card__details div{grid-template-columns:1fr;gap:2px}}