:root{--bg:#f4f6f8;--surface:#fff;--ink:#17242f;--ink-soft:#4c5c68;--ink-faint:#8494a0;--line:#dde4e9;--accent:#0e7c7b;--accent-soft:#e2f1f0;--accent-ink:#0a5a59;--warn:#b3541e;--radius:10px;--font-body:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:ui-monospace,"SF Mono","Cascadia Code",Menlo,Consolas,monospace}*{margin:0;padding:0;box-sizing:border-box}body,html{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}.shell{max-width:1100px;margin:0 auto;padding:32px 24px 80px}.masthead{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:28px}.brand{font-size:22px;font-weight:800;letter-spacing:-.5px}.brand .dot{color:var(--accent)}.tagline{color:var(--ink-soft);font-size:14px}.lang-toggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:var(--surface)}.lang-toggle button{border:none;background:transparent;padding:6px 16px;font-size:13px;font-weight:600;color:var(--ink-soft);cursor:pointer;font-family:inherit}.lang-toggle button.active{background:var(--accent);color:#fff}.lang-toggle button:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:24px;gap:24px;align-items:start}@media (max-width:860px){.grid{grid-template-columns:1fr}}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.panel h2{font-size:13px;text-transform:uppercase;letter-spacing:1.2px;color:var(--ink-faint);font-weight:700;margin-bottom:12px}textarea.doc-input{width:100%;min-height:320px;resize:vertical;border:1px solid var(--line);border-radius:var(--radius);padding:14px;font-family:var(--font-body);font-size:15px;line-height:1.5;color:var(--ink);background:#fbfcfd}textarea.doc-input:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}.input-meta{display:flex;justify-content:space-between;align-items:center;margin-top:10px;gap:12px}.char-count{font-size:12px;color:var(--ink-faint);font-family:var(--font-mono)}.btn{border:none;border-radius:var(--radius);padding:10px 22px;font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;background:var(--accent);color:#fff;transition:background .15s}.btn:hover:not(:disabled){background:var(--accent-ink)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}.btn-ghost{background:transparent;color:var(--accent-ink);border:1px solid var(--line);font-weight:600;padding:8px 16px;font-size:13px}.btn-ghost:hover:not(:disabled){background:var(--accent-soft)}.sample-link{background:none;border:none;color:var(--accent-ink);font-size:13px;font-weight:600;cursor:pointer;text-decoration:underline;font-family:inherit;padding:0}.result-block+.result-block{margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}.badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent-ink)}.badge.level-Advanced{background:#f7e6db;color:var(--warn)}.summary-text{font-size:16px;line-height:1.65}.key-points{list-style:none}.key-points li{position:relative;padding-left:22px;margin-bottom:8px;font-size:15px}.key-points li:before{content:"→";position:absolute;left:0;color:var(--accent);font-weight:700}.jargon-item{margin-bottom:10px;font-size:14.5px}.jargon-item dt{font-weight:700;color:var(--accent-ink);display:inline}.jargon-item dd{display:inline;color:var(--ink-soft)}.chat-panel{margin-top:24px}.chat-log{display:flex;flex-direction:column;gap:10px;margin-bottom:14px;max-height:380px;overflow-y:auto}.msg{max-width:85%;padding:10px 14px;border-radius:var(--radius);font-size:14.5px;line-height:1.5}.msg.user{align-self:flex-end;background:var(--accent);color:#fff}.msg.assistant{align-self:flex-start;background:var(--bg);border:1px solid var(--line)}.chat-form{display:flex;gap:10px}.chat-form input{flex:1 1;border:1px solid var(--line);border-radius:var(--radius);padding:10px 14px;font-size:15px;font-family:inherit;background:#fbfcfd}.chat-form input:focus{outline:2px solid var(--accent);outline-offset:-1px}.error-box{background:#fbeae1;border:1px solid #edccb8;color:var(--warn);border-radius:var(--radius);padding:12px 16px;font-size:14px;margin-top:12px}.empty-state{color:var(--ink-faint);font-size:14.5px;text-align:center;padding:60px 20px}.spinner{display:inline-block;width:16px;height:16px;border:2px solid hsla(0,0%,100%,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;vertical-align:-3px;margin-right:8px}@keyframes spin{to{transform:rotate(1turn)}}@media (prefers-reduced-motion:reduce){.spinner{animation-duration:2s}}.footer{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-faint);text-align:center}.footer a{color:var(--accent-ink)}