:root{--bg:#0f172a;--panel:#ffffff;--ink:#1f2937;--muted:#6b7280;--accent:#4f46e5;--ok:#059669;--warn:#d97706;--bad:#dc2626;--line:#e5e7eb}
*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:-apple-system,"Hiragino Sans","Yu Gothic UI",Meiryo,sans-serif;color:var(--ink);background:#f3f4f6}
.bar{display:flex;align-items:center;gap:24px;height:52px;padding:0 16px;background:var(--bg);color:#fff}
.brand{font-weight:700;font-size:16px}.brand span{font-weight:400;opacity:.8;margin-left:6px}
.steps{display:flex;gap:18px;list-style:none;margin:0;padding:0;font-size:13px}
.steps li{opacity:.55;display:flex;align-items:center;gap:6px}.steps li b{display:inline-flex;width:20px;height:20px;border-radius:50%;background:#334155;align-items:center;justify-content:center;font-size:12px}
.steps li.current{opacity:1}.steps li.current b{background:var(--accent)}.steps li.done{opacity:.9}.steps li.done b{background:var(--ok)}
.status{margin-left:auto;font-size:13px;display:flex;gap:8px;align-items:center}.dot{width:9px;height:9px;border-radius:50%;background:#94a3b8}
.status.ok .dot{background:#34d399}.status.warn .dot{background:#fbbf24}.status.bad .dot{background:#f87171}
.layout{display:grid;grid-template-columns:1fr 340px;height:calc(100% - 52px)}
.screen{position:relative;background:#000;overflow:hidden}
#display{width:100%;height:100%;outline:none;cursor:default}#display>div{margin:0 auto}
.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,23,42,.72)}
.overlay.hidden{display:none}
.card{background:#fff;border-radius:12px;padding:24px 28px;max-width:460px;box-shadow:0 10px 40px rgba(0,0,0,.35)}
.card h2{margin:0 0 8px;font-size:18px}.card p{margin:6px 0;line-height:1.6;font-size:14px}.card .elapsed{color:var(--muted);font-size:13px}
.actions{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap}
.guide{overflow:auto;background:var(--panel);border-left:1px solid var(--line);padding:12px 14px;font-size:13px;line-height:1.6}
.panel{padding:10px 0 12px;border-bottom:1px solid var(--line)}.panel h3{margin:0 0 6px;font-size:14px}
.panel.dim{opacity:.55}.panel.current{background:#eef2ff;margin:0 -14px;padding:10px 14px;border-left:3px solid var(--accent)}
.tips{margin:4px 0;padding-left:18px}.tips li{margin:3px 0}
.field{display:block;margin-top:8px}.row{display:flex;gap:8px;align-items:center;margin:6px 0;flex-wrap:wrap}
input,textarea{font:inherit;padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;width:100%}#code{font-size:20px;letter-spacing:4px;max-width:180px;font-variant-numeric:tabular-nums}
textarea{resize:vertical}
button{font:inherit;font-size:13px;padding:8px 12px;border-radius:8px;border:1px solid #cbd5e1;background:#fff;cursor:pointer}
button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button:disabled{opacity:.5;cursor:default}
small,.hint{color:var(--muted);font-size:12px;display:block;margin-top:4px}
@media (max-width:900px){.layout{grid-template-columns:1fr}.guide{display:none}}