:root{--page:#f4f8f7;--surface:#fff;--surface-raised:#fbfdfc;--field:#f6faf8;--ink:#18332f;--muted:#6f817c;--border:#dce8e5;--border-strong:#b8d2ca;--accent:#16846d;--accent-dark:#0d6a57;--accent-soft:#e3f3ed;--signal:#ec7959;--danger:#c94f41;--danger-soft:#fbe9e6;--amber:#a56c16;--radius:8px}*{box-sizing:border-box}html{background:var(--page);min-width:320px}body{background:var(--page);min-height:100vh;color:var(--ink);margin:0;font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif}button,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}.app-shell{width:min(1600px,100% - 48px);margin:0 auto;padding:30px 0 40px}.topbar,.panel-heading,.actions,.notice-row{align-items:center;display:flex}.topbar{border-bottom:1px solid var(--border);justify-content:space-between;gap:24px;padding:0 0 22px}.panel-kicker{color:var(--accent);letter-spacing:0;margin:0 0 5px;font-size:11px;font-weight:700}h1,h2,h3,p{margin-top:0}h1{margin-bottom:0;font-size:28px;font-weight:700;line-height:1.15}h2{margin-bottom:0;font-size:17px;line-height:1.2}h3{margin-bottom:0;font-size:13px;line-height:1.2}.actions{flex-wrap:wrap;justify-content:flex-end;gap:10px}.button{border:1px solid #0000;border-radius:7px;justify-content:center;align-items:center;gap:7px;min-height:42px;padding:0 14px;font-size:14px;font-weight:700;transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s;display:inline-flex}.button.primary{border-color:var(--accent);background:var(--accent);color:#fff;box-shadow:0 3px 8px #16846d33}.button.primary:hover:not(:disabled){background:var(--accent-dark);box-shadow:0 4px 10px #16846d40}.button.secondary{border-color:var(--border-strong);background:var(--surface);box-shadow:none;color:var(--ink)}.button.secondary:hover:not(:disabled){border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark)}.notice-row{min-height:42px;color:var(--muted);flex-wrap:wrap;gap:10px 16px;padding:10px 0;font-size:13px}.storage-notice,.message,.error{align-items:center;gap:6px;display:inline-flex}.storage-notice{color:var(--amber)}.message{color:var(--accent)}.error{color:var(--danger)}.workspace{grid-template-columns:minmax(280px,1.08fr) minmax(280px,1fr) minmax(300px,1.18fr);gap:18px;min-height:680px;display:grid}.panel{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);min-width:0;box-shadow:0 8px 24px #1c433a0e}.panel-heading{border-bottom:1px solid var(--border);background:var(--surface-raised);justify-content:space-between;gap:16px;min-height:74px;padding:16px 18px}.panel-heading time,.format-badge{color:var(--muted);flex:none;font-size:12px}.format-badge{background:var(--accent-soft);color:var(--accent);border:1px solid #b7dbcc;border-radius:4px;padding:4px 7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.source-panel{flex-direction:column;min-height:640px;display:flex}textarea{resize:vertical;background:var(--field);color:#29433e;border:0;outline:none;flex:1;width:100%;min-height:0;padding:17px 18px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:13px;line-height:1.75}textarea:focus{box-shadow:inset 0 0 0 2px #9edbca}textarea::selection{color:var(--ink);background:#c5e9dc}textarea::-webkit-scrollbar{width:10px}textarea::-webkit-scrollbar-track{background:#eef5f2}textarea::-webkit-scrollbar-thumb{background:#aac8bf;border:2px solid #eef5f2;border-radius:8px}textarea::-webkit-scrollbar-thumb:hover{background:var(--accent)}.results-panel,.difference-panel{flex-direction:column;display:flex;overflow:hidden}.output-textarea{resize:none;color:#415a54;cursor:text;min-height:0}.difference-textareas{flex:1;grid-template-rows:minmax(0,1fr) minmax(0,1fr);min-height:0;display:grid}.difference-textarea-section{flex-direction:column;min-height:0;display:flex}.difference-textarea-section+.difference-textarea-section{border-top:1px solid var(--border)}.difference-textarea-section h3{color:var(--accent-dark);padding:11px 18px 0}@media (max-width:1040px){.workspace{grid-template-columns:minmax(280px,1fr) minmax(280px,1fr);min-height:auto}.source-panel{grid-column:1/-1;min-height:340px}}@media (max-width:680px){.app-shell{width:min(100% - 24px,640px);padding-top:18px}.topbar{flex-direction:column;align-items:flex-start;padding-bottom:18px}.actions{justify-content:stretch;width:100%}.button{flex:1}.workspace{flex-direction:column;display:flex}.source-panel{min-height:360px}.panel-heading{padding:15px}.output-textarea{min-height:280px}}
