:root{--bg: #090e13;--panel: #101922;--panel-raised: #16212c;--line: #22313e;--line-strong: #31465a;--ink: #dce7f0;--ink-dim: #9fb3c4;--muted: #7d93a6;--cyan: #5ac8fa;--amber: #ffb454;--green: #8ce99a;--rose: #ff8fa3;--violet: #c0a6ff;--focus: #7fd8ff;--radius: 4px;--radius-lg: 8px;--sans: "IBM Plex Sans", system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;--mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 8px 24px rgba(0, 0, 0, .35)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:radial-gradient(1200px 600px at 70% -10%,rgba(90,200,250,.07),transparent 60%),var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-weight:600;line-height:1.25;margin:0;letter-spacing:-.01em}h1{font-size:1.6rem}h2{font-size:1.15rem}h3{font-size:1rem}p{margin:0 0 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i{width:5px;height:5px;border-radius:50%;background:var(--line-strong)}.difficulty i.on{background:var(--amber)}table.data{width:100%;border-collapse:collapse;font-size:.88rem}table.data th,table.data td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}table.data th{color:var(--muted);font-weight:500;font-size:.78rem}table.data tr:hover td{background:#ffffff05}table.data td.num,table.data th.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}.admin{display:grid;grid-template-columns:210px minmax(0,1fr);gap:20px}@media (max-width: 860px){.admin{grid-template-columns:1fr}}.admin-nav{display:flex;flex-direction:column;gap:2px;position:sticky;top:70px;align-self:start}.admin-nav a{padding:7px 11px;border-radius:var(--radius);color:var(--ink-dim);font-size:.9rem}.admin-nav a:hover{background:var(--panel);text-decoration:none}.admin-nav a.active{background:var(--panel-raised);color:var(--ink);box-shadow:inset 2px 0 0 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var(--line);border-radius:var(--radius);overflow:hidden}.code-fallback{width:100%;min-height:420px;background:#0b131a;border:0;font-family:var(--mono);font-size:13px;line-height:1.55;padding:12px;-moz-tab-size:2;tab-size:2}.problems{display:flex;flex-direction:column;gap:6px;font-size:.85rem}.problem{display:flex;gap:8px;padding:6px 9px;border-radius:var(--radius);border:1px solid var(--line)}.problem.error{border-color:#6d2b38;color:#ffc4cd}.problem.warning{border-color:#6d5326;color:#ffddab}.notice{padding:10px 13px;border-radius:var(--radius);border:1px solid var(--line-strong);background:var(--panel);font-size:.9rem}.notice.error{border-color:#6d2b38;color:#ffc4cd}.notice.success{border-color:#2c6b43;color:#cdf5d6}.empty{text-align:center;padding:48px 20px;color:var(--muted)}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:8px;z-index:100;background:var(--panel-raised);padding:8px 12px;border-radius:var(--radius)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}.landing{display:grid;gap:64px;padding-bottom:40px}.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:center;padding:36px 0 12px}@media (max-width: 900px){.hero{grid-template-columns:1fr;gap:26px;padding-top:18px}}.eyebrow{font-size:.78rem;letter-spacing:.34em;text-transform:uppercase;color:var(--cyan);margin:0 0 14px}.hero h1{font-size:clamp(2rem,5.2vw,3.3rem);line-height:1.18;letter-spacing:-.02em;margin-bottom:18px}.lede{font-size:1.03rem;color:var(--ink-dim);max-width:46ch;margin-bottom:22px}.hero-note{color:var(--muted);font-size:.8rem;margin-top:14px}.btn-lg{padding:11px 20px;font-size:.98rem}.hero-figure{margin:0}.hero-figure canvas{display:block;width:100%;height:340px;background:linear-gradient(180deg,#0c151d,#0a1016);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow)}.hero-figure figcaption{font-size:.74rem;color:var(--muted);margin-top:8px;text-align:right}@media (max-width: 900px){.hero-figure canvas{height:240px}}.strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}.strip-item{background:var(--panel);padding:18px 16px}.strip-n{font-size:1.9rem;line-height:1.1;color:var(--ink)}.strip-k{font-size:.8rem;color:var(--muted);margin-top:2px}.pitch h2{font-size:1.45rem;margin-bottom:18px}.pitch-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px}.feature{border-left:2px solid var(--line-strong);padding:2px 0 2px 16px}.feature h3{font-size:.98rem;margin-bottom:6px}.feature p{font-size:.89rem;color:var(--ink-dim);margin:0}.steps{counter-reset:step;list-style:none;padding:0;display:grid;gap:12px;max-width:70ch}.steps li{counter-increment:step;position:relative;padding-left:40px;color:var(--ink-dim);font-size:.93rem}.steps li:before{content:counter(step);position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);color:var(--cyan);font-family:var(--mono);font-size:.8rem;display:grid;place-items:center}.local-banner{background:#1a1408;border:1px solid #6d5326;color:#ffddab;border-radius:var(--radius);padding:9px 13px;font-size:.85rem;margin-bottom:14px}