:root{--ink:#18212f;--muted:#657286;--line:#dfe5ec;--navy:#0b1930;--blue:#1469d8;--green:#16835c;--bg:#f4f7fa}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}a{color:inherit}.topbar{min-height:68px;padding:0 5vw;background:var(--navy);color:#fff;display:flex;align-items:center;gap:28px}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;font-weight:750;white-space:nowrap}.brand-mark{width:29px;height:29px;display:grid;place-items:center;border:1px solid #52d1de;color:#52d1de;font-size:14px}.nav{display:flex;gap:4px;margin-right:auto}.nav a{color:#d6dfec;padding:8px 11px;text-decoration:none;font-size:14px;border-bottom:2px solid transparent}.nav a.active,.nav a:hover{color:#fff;border-color:#52d1de}.account{display:flex;align-items:center;gap:13px;color:#d6dfec;font-size:14px}.account form{margin:0}.link-button{background:none;border:0;color:#d6dfec;font:inherit;cursor:pointer;padding:8px 0}.link-button:hover{color:#fff}.page{width:min(1120px,90vw);margin:0 auto;padding:44px 0 64px}.eyebrow{color:var(--blue);font-size:12px;font-weight:750;text-transform:uppercase}.page-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}.page-heading h1{font-size:30px;margin:7px 0 0}.page-heading p{color:var(--muted);margin:0;max-width:490px;line-height:1.5}.challenge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.challenge-card{display:block;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:6px;padding:21px;transition:.16s}.challenge-card:hover{border-color:#9cb9e4;box-shadow:0 7px 18px #243a5714;transform:translateY(-2px)}.card-top,.meta{display:flex;justify-content:space-between;gap:12px;align-items:center}.category,.state{font-size:12px;font-weight:700;padding:4px 8px;border-radius:3px}.category{background:#e9f2ff;color:#1558aa}.state{background:#e5f7ee;color:#11714c}.challenge-card h2{margin:17px 0 12px;font-size:19px}.challenge-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.5;min-height:42px}.meta{margin-top:20px;color:var(--muted);font-size:13px}.points{color:var(--ink);font-size:15px;font-weight:750}.panel{background:#fff;border:1px solid var(--line);border-radius:6px}.detail{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:22px}.detail-main{padding:28px}.detail-main h1{margin:10px 0 20px;font-size:30px}.description{color:#415066;line-height:1.7;white-space:pre-line}.detail-side{padding:22px;align-self:start}.detail-side dl{margin:0 0 20px}.detail-side dt{color:var(--muted);font-size:12px;text-transform:uppercase;margin-top:15px}.detail-side dd{margin:4px 0 0;font-weight:650}.flag-form{display:grid;gap:10px}.flag-form label{font-weight:700;font-size:14px}.flag-form input{width:100%;border:1px solid #bbc7d6;border-radius:4px;padding:11px;font-family:ui-monospace,monospace}.primary{background:var(--blue);color:#fff;border:0;border-radius:4px;padding:11px 15px;font-weight:700;font-size:14px;cursor:pointer}.primary:hover{background:#0959bd}.notice{border-left:3px solid #d89d1a;background:#fff8e8;padding:12px;font-size:14px;line-height:1.45;margin:0 0 17px}.success{border-color:var(--green);background:#eaf8f1;color:#105c41}.hint{margin-top:20px;border-top:1px solid var(--line);padding-top:16px;color:var(--muted);font-size:14px;line-height:1.5}.score-table{width:100%;border-collapse:collapse}.score-table th{text-align:left;color:var(--muted);font-size:12px;text-transform:uppercase;font-weight:700;padding:14px 17px;border-bottom:1px solid var(--line)}.score-table td{padding:17px;border-bottom:1px solid #edf0f4}.score-table tr:last-child td{border:0}.rank{color:var(--muted);width:70px}.empty{color:var(--muted);padding:30px;text-align:center}.auth-layout{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(360px,.9fr)}.auth-aside{padding:8vh 8vw;background:var(--navy);color:#fff;display:flex;flex-direction:column;justify-content:space-between}.auth-aside h1{font-size:42px;max-width:580px;line-height:1.1;margin:24px 0 14px}.auth-aside p{color:#bac8da;max-width:500px;line-height:1.6}.domain{color:#52d1de;font-family:ui-monospace,monospace;font-size:14px}.auth-main{display:grid;place-items:center;padding:30px}.auth-card{width:min(390px,100%)}.auth-card h2{margin:0 0 8px;font-size:27px}.auth-card>p{color:var(--muted);margin:0 0 25px;line-height:1.5}.tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:22px}.tabs button{background:transparent;border:0;padding:10px 14px;color:var(--muted);font-weight:700;cursor:pointer}.tabs button.active{border-bottom:2px solid var(--blue);color:var(--blue)}.form{display:grid;gap:14px}.form label{font-size:14px;font-weight:700;display:grid;gap:7px}.form input{padding:11px;border:1px solid #bac6d5;border-radius:4px;font:inherit}.form input:focus,.flag-form input:focus{outline:2px solid #a8c9f6;border-color:var(--blue)}.form .primary{margin-top:4px}.alert{background:#fff1f0;border-left:3px solid #d84740;color:#812d28;padding:11px;font-size:14px;margin-bottom:16px}@media(max-width:760px){.topbar{padding:0 5vw;gap:14px}.nav{display:none}.account{margin-left:auto}.page{padding-top:30px}.page-heading,.detail{display:block}.page-heading p{margin-top:12px}.challenge-grid{grid-template-columns:1fr}.detail-side{margin-top:16px}.auth-layout{grid-template-columns:1fr}.auth-aside{min-height:260px;padding:40px 8vw}.auth-aside h1{font-size:32px}.auth-main{padding:40px 8vw}}