:root{--bg: #0c1210;--panel: #141c18;--ink: #e8f0ea;--muted: #8aa094;--accent: #3dd68c;--warn: #f0c14a;--danger: #ff6b6b;--line: #24302a;--font: "Outfit", system-ui, sans-serif;--mono: "IBM Plex Mono", ui-monospace, monospace}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:var(--font);color:var(--ink);background:radial-gradient(ellipse 80% 50% at 10% -10%,#1a3d2e 0%,transparent 50%),radial-gradient(ellipse 60% 40% at 100% 0%,#1a2a40 0%,transparent 45%),var(--bg)}a{color:inherit;text-decoration:none}.shell{max-width:1100px;margin:0 auto;padding:1.25rem}.top{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid var(--line)}.brand{font-weight:700;font-size:1.4rem;letter-spacing:-.02em;color:var(--accent)}nav{display:flex;gap:1.25rem;align-items:center}nav a:hover{color:var(--accent)}.panel{background:color-mix(in srgb,var(--panel) 92%,transparent);border:1px solid var(--line);border-radius:12px;padding:1.5rem;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.narrow{max-width:380px;margin:2rem auto}.hero-block h1{margin:0 0 .35rem;font-size:2rem}.hero-block p{color:var(--muted);margin:0 0 1.25rem}.filters{display:flex;gap:.75rem;margin-bottom:1rem}input,select,textarea,button{font:inherit}input,select{background:var(--bg);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:.65rem .85rem;flex:1}button{background:var(--accent);color:#062014;border:none;border-radius:8px;padding:.65rem 1.1rem;font-weight:600;cursor:pointer}button:disabled{opacity:.6;cursor:wait}.ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}.problem-list{list-style:none;padding:0;margin:0}.problem-list li a{display:grid;grid-template-columns:80px 1fr auto;gap:1rem;align-items:center;padding:.9rem 0;border-bottom:1px solid var(--line)}.problem-list li a:hover strong{color:var(--accent)}.diff{text-transform:uppercase;font-size:.7rem;font-weight:700;letter-spacing:.06em}.diff.easy{color:var(--accent)}.diff.medium{color:var(--warn)}.diff.hard{color:var(--danger)}.tags{color:var(--muted);font-size:.85rem}.split{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media (max-width: 800px){.split{grid-template-columns:1fr}}.statement{white-space:pre-wrap;line-height:1.55;color:#c5d4cb}.example{background:var(--bg);padding:.85rem;border-radius:8px;font-family:var(--mono);font-size:.85rem}.editor{width:100%;min-height:360px;background:#0a0f0d;color:#d4e8da;border:1px solid var(--line);border-radius:8px;padding:1rem;font-family:var(--mono);font-size:.9rem;resize:vertical}.actions{display:flex;align-items:center;gap:1rem;margin-top:.75rem}.verdict{font-family:var(--mono);font-weight:600}.verdict.AC{color:var(--accent)}.verdict.WA,.verdict.RE,.verdict.CE,.verdict.TLE,.err{color:var(--danger)}.muted{color:var(--muted)}.form{display:flex;flex-direction:column;gap:.75rem;margin:1rem 0}.board{width:100%;border-collapse:collapse;margin-top:1rem}.board th,.board td{text-align:left;padding:.65rem .4rem;border-bottom:1px solid var(--line)}.back{color:var(--muted);font-size:.9rem}