:root{--bg-0:#070b14;--bg-1:#0c1322;--bg-card:#111a2eb8;--border:#788cb429;--text-1:#e8edf7;--text-2:#93a1ba;--text-3:#5c6a85;--accent:#4f8cff;--dl:#4f8cff;--ul:#34d97b;--danger:#ff7a7a;--radius-lg:18px;--font-mono:ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:radial-gradient(1100px 600px at 80% -10%, #4f8cff24, transparent 60%), radial-gradient(900px 500px at -10% 110%, #34d97b14, transparent 55%), linear-gradient(180deg, var(--bg-0), var(--bg-1));min-height:100vh;color:var(--text-1);-webkit-font-smoothing:antialiased;background-attachment:fixed;font-family:Inter,Segoe UI,Hiragino Sans,Noto Sans JP,system-ui,sans-serif;line-height:1.6}.app{max-width:920px;margin:0 auto;padding:40px 20px 64px}header h1{letter-spacing:.02em;margin:0;font-size:1.6rem}.subtitle{color:var(--text-2);margin:2px 0 0;font-size:.85rem}section{margin-top:20px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.stepper ol{margin:0;padding:14px 18px;list-style:none;display:flex}.step,.stepper li{text-align:center;color:var(--text-3);white-space:nowrap;flex:1;padding:4px;font-size:.82rem;transition:color .25s;position:relative}.stepper li:before{content:"";z-index:1;background:var(--text-3);opacity:.45;border-radius:50%;width:10px;height:10px;margin:0 auto 7px;transition:all .25s;display:block;position:relative}.stepper li:after{content:"";background:#94a3b838;height:2px;transition:background .25s;position:absolute;top:8px;left:50%;right:-50%}.stepper li:last-child:after{content:none}@keyframes stepPulse{0%,to{box-shadow:0 0 0 0 #4f8cff80, 0 0 10px var(--accent);transform:scale(1.15)}70%{box-shadow:0 0 0 7px #4f8cff00, 0 0 10px var(--accent);transform:scale(1.15)}}.stepper li.active{color:var(--text-1)}.stepper li.active:before{background:var(--accent);opacity:1;animation:1.6s ease-out 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.speed-num{color:var(--dl)}.live-metric.ul .speed-num{color:var(--ul)}.speed-unit{color:var(--text-2);font-size:1.05rem;font-weight:600}#graph{width:100%;height:280px;margin-top:18px;display:block}.controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;padding:16px 18px;display:flex}.control-group{flex-direction:column;gap:6px;display:flex}.control-label{color:var(--text-3);letter-spacing:.06em;font-size:.74rem}.segmented{border:1px solid var(--border);background:#080c1899;border-radius:999px;gap:4px;padding:4px;display:inline-flex}.segmented label{position:relative}.segmented input{opacity:0;cursor:pointer;position:absolute;inset:0}.segmented span{color:var(--text-2);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:999px;padding:7px 16px;font-size:.85rem;transition:background .2s,color .2s;display:block}.segmented input:checked+span{color:#fff;background:linear-gradient(135deg,#2f6bff,#4f8cff);box-shadow:0 2px 12px #4f8cff59}.segmented 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.9s}.score-center{flex-direction:column;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.score-total{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:2.7rem;font-weight:700;line-height:1.05}.score-grade{letter-spacing:.14em;text-transform:uppercase;font-size:.82rem;font-weight:700}.score-breakdown{flex-direction:column;flex:1;gap:11px;min-width:260px;margin:0;display:flex}.score-row{grid-template-columns:96px 1fr 40px;align-items:center;gap:12px;display:grid}.score-row dt{color:var(--text-2);white-space:nowrap;font-size:.82rem}.score-bar{background:#94a3b824;border-radius:999px;height:8px;overflow:hidden}.score-fill{border-radius:999px;width:0;height:100%;transition:width 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