:root{--green:#1c7a3a;--green-dark:#155e2c;--navy:#163a5f;--yellow:#ffd23f;--cream:#fffaf0;--cream-card:#f6e7c4;--grey:#9fb3c8;--black:#163a5f;--bg:#fffaf0;--fg:#163a5f;--muted:#5a5a55;--card:#ffffff;--border:#e6ddca}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:Poppins,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.wrap{max-width:560px;margin:0 auto;padding:40px 20px 64px;text-align:center}.wrap.wide{max-width:960px}h1{font-size:30px;font-weight:700;letter-spacing:.02em;margin:0 0 4px;color:var(--navy)}h1 .accent{color:var(--green)}.serial{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.18em;color:var(--muted);margin:0 0 28px}.err{color:#b00020}.hint{color:var(--muted);font-size:14px}.board-area{display:inline-flex;flex-direction:column;align-items:center;gap:16px}.board-photo{position:relative;width:min(360px,86vw);aspect-ratio:1/1;margin:0 auto;filter:drop-shadow(0 8px 20px rgba(22,58,95,.22));touch-action:none}.board-photo .frame-img{inset:0;width:100%;height:100%;pointer-events:none}.board-photo .frame-img,.board-photo .ptile{position:absolute;-webkit-user-select:none;-moz-user-select:none;user-select:none}.board-photo .ptile{-webkit-user-drag:none;touch-action:none;transition:left .32s cubic-bezier(.2,.8,.2,1),top .32s cubic-bezier(.2,.8,.2,1)}.board-photo .hint-arrow{position:absolute;display:flex;align-items:center;justify-content:center;pointer-events:none;z-index:3}.board-photo .hint-arrow span{color:#ffffff;font-size:clamp(1.4rem,9vw,2.6rem);font-weight:700;line-height:1;text-shadow:0 0 8px rgba(0,0,0,.75),0 2px 5px rgba(0,0,0,.6);animation:hint-pulse 1s ease-in-out infinite}@keyframes hint-pulse{0%,to{transform:scale(1);opacity:.85}50%{transform:scale(1.18);opacity:1}}.board{position:relative;background:var(--navy);border-radius:14px;padding:0;box-shadow:0 6px 22px 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var(--border);border-radius:8px;padding:10px 12px;color:var(--navy);font-size:15px;font-family:inherit}.panel input:focus{outline:none;border-color:var(--green)}.panel button{margin-top:4px}.panel .ok{color:var(--green);margin:0 0 10px;font-weight:600}.panel .err{color:#b00020;margin:12px 0 0}.consent{display:flex;align-items:flex-start;gap:10px;background:var(--cream);border:1px solid var(--border);border-radius:8px;padding:12px;font-size:13px;line-height:1.45;color:var(--fg);cursor:pointer}.consent input[type=checkbox]{margin-top:2px;width:18px;height:18px;flex:0 0 auto;accent-color:var(--green);cursor:pointer}.actions{display:grid;grid-template-columns:1fr;grid-gap:12px;gap:12px;max-width:420px;margin:32px auto 0}.action{display:flex;flex-direction:column;gap:4px;text-align:left;text-decoration:none;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px 18px;color:var(--navy);transition:transform .12s ease,box-shadow .12s ease,border-color .12s 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