:root{--bg:#0b0f17;--panel:#131926;--panel-2:#1a2233;--border:#26304a;--text:#e6ebf5;--muted:#9aa7bd;--accent:#4f9cff;--good:#3fb984;--warn:#e6b450;--bad:#e06666}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}.container{max-width:940px;margin:0 auto;padding:40px 24px 80px}header h1{margin:0 0 6px;font-size:28px}header p{margin:0 0 18px}header p,label{color:var(--muted)}label{display:block;font-size:13px;margin:12px 0 6px}input[type=text],textarea{width:100%;background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:11px 14px;font-size:13px;font-family:ui-monospace,Menlo,monospace}textarea{min-height:80px;resize:vertical}input:focus,textarea:focus{outline:none;border-color:var(--accent)}.case{display:flex;gap:8px;margin:6px 0}.case input{flex:1 1}.case button{flex:0 0 auto}.actions{display:flex;gap:12px;align-items:center;margin:16px 0 8px}button{background:var(--accent);color:#06122a;border:none;border-radius:8px;padding:10px 16px;font-weight:600;font-size:14px;cursor:pointer}button.ghost{background:transparent;color:var(--muted);border:1px solid var(--border)}button:disabled{opacity:.5;cursor:default}.error{color:var(--bad);margin:12px 0}.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin:16px 0}.rate{font-size:30px;font-weight:800}.rate.hi{color:var(--good)}.rate.mid{color:var(--warn)}.rate.lo{color:var(--bad)}table{width:100%;border-collapse:collapse;font-size:13px;margin-top:8px}td,th{text-align:left;padding:7px 10px;border-bottom:1px solid var(--border);vertical-align:top}th{font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}td.io,th{color:var(--muted)}td.io{font-family:ui-monospace,Menlo,monospace;max-width:260px;word-break:break-word}.pass{color:var(--good)}.fail,.pass{font-weight:700}.fail{color:var(--bad)}.sec-title{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:14px 0 6px}.improved{font-family:ui-monospace,Menlo,monospace;font-size:13px;color:#b8e0c8;background:var(--panel-2);border:1px solid #1e4636;border-radius:8px;padding:12px 14px;white-space:pre-wrap}