:root{--bg: #0a0f14;--panel: #111820;--panel2: #18222c;--ink: #e4edf4;--muted: #8698a8;--line: rgba(255,255,255,.09);--brand: #29c3a5;--brand2: #f0a83a;--radius: 8px;--ok: #34d399;--warn: #fbbf24;--red: #f87171;--grad: linear-gradient(135deg, #1f9e86, #29c3a5)}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:Segoe UI,Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}h1,h2,h3{margin:0 0 .4em;font-weight:700;letter-spacing:-.01em}.muted{color:var(--muted)}.grow{flex:1}.mono{font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:12.5px}.row{display:flex;align-items:center;gap:12px}.wrap{flex-wrap:wrap}.topbar{display:flex;align-items:center;gap:12px;padding:14px 24px;border-bottom:1px solid var(--line);background:#0d141b}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px}.brand img{width:30px;height:30px}.tag{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:3px 7px}.content{max-width:1080px;margin:0 auto;padding:22px}.grid{display:grid;gap:16px;grid-template-columns:1.4fr 1fr;align-items:start}@media (max-width: 860px){.grid{grid-template-columns:1fr}}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);font-size:13px}th{color:var(--muted);font-size:11px;text-transform:uppercase}.badge{display:inline-flex;padding:2px 8px;border-radius:6px;font-size:11px;font-weight:700}.easy{background:#34d39926;color:var(--ok)}.medium{background:#f0a83a26;color:var(--brand2)}.hard{background:#f8717126;color:var(--red)}.btn{border:0;border-radius:6px;padding:9px 15px;font-weight:700;font-size:14px;cursor:pointer;background:var(--grad);color:#04140d}textarea{width:100%;background:#080d12;border:1px solid var(--line);border-radius:6px;padding:12px;color:var(--ink);font-family:ui-monospace,Consolas,monospace;font-size:12.5px;outline:none;min-height:160px;resize:vertical}textarea:focus{border-color:var(--brand)}.meter{height:10px;border-radius:5px;background:var(--panel2);overflow:hidden}.meter>div{height:100%;background:var(--grad)}.big{font-size:40px;font-weight:800}.row2{display:flex;justify-content:space-between;padding:4px 0;font-size:13px}.found{color:var(--ok)}.miss{color:var(--muted)}.classrow{display:flex;align-items:center;gap:10px;margin:6px 0;font-size:13px}.classrow .m{flex:1}