:root{color-scheme:light;--ink:#1d3143;--muted:#52677a;--navy:#203e59;--accent:#245f91;--line:#cbd6df;--paper:#f1f5f8;--tint:#e8f0f6;--danger:#a33c38;--series-current:#376e99;--series-before:#8c9aa8;--series-after:#315f84;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic UI",Meiryo,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;font-size:14px;line-height:1.65}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.48;cursor:not-allowed}[hidden]{display:none!important}::selection{color:#fff;background:#245f91}:focus-visible{outline:3px solid #437da9;outline-offset:4px}input,select,textarea{caret-color:var(--accent)}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:78px;background:var(--navy);color:#fff;padding:18px max(28px,calc((100vw - 1180px)/2))}.brand{display:flex;align-items:baseline;gap:18px;color:#fff;font-size:22px;font-weight:700;text-decoration:none;white-space:nowrap}.brand span{font-size:12px;color:#c8dceb;font-weight:400}.privacy{font-size:12px;color:#d4e3ee;white-space:nowrap}main{width:min(1180px,calc(100% - 56px));margin:auto}.intro{display:flex;align-items:baseline;gap:22px;padding:29px 0 21px}h1{font-size:23px;font-weight:650;letter-spacing:.01em;line-height:1.5;margin:0}.intro p{margin:0;font-size:13px;color:var(--muted)}
.tabs{display:flex;gap:30px;border-bottom:1px solid #aebfcd;margin:0 0 24px}.tab{min-height:47px;padding:8px 3px 13px;background:transparent;color:var(--muted);border:0;position:relative;font-size:14px}.tab:hover{color:var(--accent)}.tab.active{color:var(--navy);font-weight:700}.tab.active:after{content:"";background:var(--accent);height:3px;position:absolute;inset:auto 0 -1px}.tab b{margin-left:6px;font-size:12px;font-variant-numeric:tabular-nums;font-weight:500}
#measure-panel{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(320px,1fr);grid-template-areas:"meter setup" "spectrum setup";gap:22px 26px}.measure-grid{display:contents}.card{background:#fff;border-radius:4px}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;min-width:0}h2{font-size:16px;margin:0;line-height:1.6;font-weight:650}.state{font-size:12px;color:var(--muted);white-space:nowrap}.state.running{color:var(--accent);font-weight:700}
.meter{grid-area:meter;display:grid;grid-template-columns:minmax(0,1fr) minmax(150px,.8fr);column-gap:25px;padding:23px 26px 17px}.meter>.card-heading{grid-column:1/-1;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:24px}.readout{grid-column:1;grid-row:2;display:flex;align-items:baseline;gap:10px;align-self:center;min-height:85px}.readout>span:first-child{font-size:72px;line-height:1;letter-spacing:-.025em;font-weight:450;font-variant-numeric:tabular-nums}.readout>span:last-child{font-size:13px;color:var(--muted)}.meter-caption{grid-column:1;grid-row:3;font-size:12px;line-height:1.7;color:var(--muted);margin:9px 0 18px}.stats{grid-column:2;grid-row:2/4;display:flex;flex-direction:column;gap:12px;border-left:1px solid var(--line);padding-left:23px}.stats>div{display:flex;align-items:center;justify-content:space-between;gap:12px}.stats span{font-size:11px;color:var(--muted);line-height:1.5}.stats small{display:block;font-size:11px}.stats abbr{text-decoration:none}.stats strong{font-size:22px;font-weight:500;font-variant-numeric:tabular-nums;white-space:nowrap}
.level-track{grid-column:1/-1;height:5px;background:#e1e9ef;overflow:hidden}.level-track>div{height:100%;width:0;background:var(--accent);transition:width .18s ease-out}.scale{grid-column:1/-1;display:flex;justify-content:space-between;color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums;margin-top:6px}.timer-line{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);margin-top:19px}#elapsed{font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums}progress{grid-column:1/-1;display:block;width:100%;height:3px;border:0;margin:7px 0 17px;background:var(--tint);accent-color:var(--accent)}progress::-webkit-progress-bar{background:var(--tint)}progress::-webkit-progress-value{background:var(--accent)}
.button{min-height:46px;display:inline-flex;justify-content:center;align-items:center;gap:9px;border:1px solid transparent;border-radius:4px;padding:11px 18px;font-size:13px;font-weight:600;transition:background-color .16s ease-out}.button.primary{color:#fff;background:var(--accent)}.button.primary:hover:not(:disabled){background:#194c77}.button.primary:active:not(:disabled){background:var(--navy)}.button.secondary{color:var(--navy);background:#fff;border-color:#aebfcd}.button.secondary:hover:not(:disabled){background:var(--tint)}.button.stop{color:#fff;background:var(--danger)}.button.stop:hover{background:#862d2a}.full{width:100%}.action-icon{width:18px;height:18px;fill:currentColor;flex-shrink:0}.meter>.button,.result-actions,#result-state,.calibration-strip{grid-column:1/-1}.text-button{padding:8px 0;border:0;color:var(--accent);background:none;font-size:12px;text-decoration:underline;text-underline-offset:4px}.text-button:hover{color:var(--navy)}
.calibration-strip{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:10px;margin-top:17px;font-size:12px;color:#805614}.calibration-strip>div{display:flex;gap:8px;align-items:center}.cal-dot{width:6px;height:6px;display:inline-block;background:#a67927}.cal-dot.ready{background:var(--accent)}.setup{grid-area:setup;padding:23px 26px;align-self:start;background:#e8f0f6}.setup .card-heading{border-bottom:1px solid #bccfdd;padding-bottom:16px;margin-bottom:16px}.step-tag{font-size:11px;color:var(--muted)}label{display:block;font-size:12px;font-weight:600;margin:15px 0 7px}label span{display:inline;font-weight:400;color:var(--muted);font-size:11px}input,select,textarea{width:100%;min-height:42px;background:#fff;color:var(--ink);border:1px solid #9fb4c5;border-radius:3px;padding:9px 11px;font-size:13px}textarea{resize:vertical;line-height:1.7}input::placeholder,textarea::placeholder{color:#5f7284;font-size:12px;opacity:1}input:disabled,select:disabled,textarea:disabled{color:#53697b;background:#e1e8ef}.form-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:15px}.input-status{display:flex;align-items:flex-start;gap:7px;margin:19px 0 0;color:var(--muted);font-size:11px;overflow-wrap:anywhere}.dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0;margin-top:6px}.tip{border-top:1px solid #bccfdd;margin:18px 0 0;padding-top:15px;color:var(--muted);font-size:12px;line-height:1.9}.tip b{font-weight:600;color:var(--ink)}
.spectrum{grid-area:spectrum;padding:22px 25px 17px;min-width:0}.chart-key{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.chart-key i,.legend i{display:inline-block;width:9px;height:9px;background:var(--series-current)}.chart-wrap{margin:15px 0 0;min-width:0}.chart-wrap svg{display:block;width:100%;height:auto;overflow:visible}.chart-grid{stroke:#dce4eb;stroke-width:1}.chart-label{fill:#52677a;font:11px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-variant-numeric:tabular-nums}.chart-value{fill:#244663;font:11px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-variant-numeric:tabular-nums}.spectrum-footer{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding-top:11px;font-size:11px;color:var(--muted)}.subtle{color:var(--muted);font-size:12px;line-height:1.8}.result-actions{display:flex;flex-wrap:wrap;gap:9px}.result-actions .button{flex:1}.result-actions .text-button{width:100%;text-align:center}#result-state:empty{display:none}
.notice{border:1px solid #cdb987;border-radius:4px;background:#fff8e7;color:#735118;padding:13px 17px;margin:0 0 20px;font-size:12px;line-height:1.8;white-space:pre-line}.notice.error{color:#8c302b;background:#fff0ed;border-color:#dda79c}.notice.good{color:#244663;background:#e6f0f7;border-color:#afc7d9}.method{background:transparent;border-top:1px solid #b5c5d1;border-bottom:1px solid #b5c5d1;border-radius:0;margin-top:28px}.method summary{display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding:17px 0;font-size:12px;list-style:none}.method summary::-webkit-details-marker{display:none}.method-content{max-width:75ch;font-size:12px;color:var(--muted);line-height:1.95;padding:0 0 18px}footer{display:flex;justify-content:space-between;gap:15px;padding:24px 0 28px;font-size:11px;color:var(--muted)}.footer-version{margin-left:8px;font-size:11px}
.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:8px 0 20px}.section-heading h2,.compare-setup h2{font-size:20px}.history-item{padding:20px 23px;border-bottom:1px solid var(--line);border-radius:0;display:flex;align-items:center;justify-content:space-between;gap:24px}.history-item h3{font-size:15px;margin:0 0 6px;overflow-wrap:anywhere}.history-item .subtle{margin:4px 0}.history-actions{display:flex;gap:20px;flex-wrap:wrap}.pill{display:inline;font-size:11px;color:var(--muted);margin-right:12px;font-weight:400}.empty{padding:50px 24px;text-align:center}.empty h2{font-size:18px}.empty p{color:var(--muted);font-size:13px}.empty .button{margin-top:10px}.empty-icon{display:none}.compare-setup{padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:20px}.comparison-summary{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:23px 26px}.comparison-summary strong{font-size:40px;font-weight:500;color:var(--navy);font-variant-numeric:tabular-nums}.comparison-summary p{margin:7px 0 0;font-size:12px;color:var(--muted);line-height:1.8}.eyebrow{display:none}.legend{display:flex;gap:18px;font-size:12px;color:var(--muted)}.legend span{display:flex;align-items:center;gap:6px}.legend .before-key{background:var(--series-before)}.legend .after-key{background:var(--series-after)}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;margin-top:20px;font-size:12px;font-variant-numeric:tabular-nums}th,td{border-bottom:1px solid var(--line);padding:10px 13px;text-align:right}th{font-weight:500;color:var(--muted);font-size:11px}th:first-child,td:first-child{text-align:left}.positive{color:#245f78}.negative{color:#9d443b}
dialog{width:calc(100% - 32px);max-width:560px;max-height:calc(100dvh - 32px);overflow:auto;border:0;border-radius:6px;padding:28px;color:var(--ink);background:#fff;box-shadow:0 12px 46px #00000033}dialog::backdrop{background:#162d4266}dialog h2{font-size:21px;margin-bottom:17px}dialog>p{font-size:13px;color:var(--muted);line-height:1.85}dialog .tip{background:#f2f5f8;padding:12px 14px;border:0}dialog .button{margin-top:12px}.dialog-close{float:right;border:0;background:none;font-size:24px;line-height:1;color:var(--muted);min-width:36px;min-height:36px}#calibration-feedback{color:var(--danger);min-height:18px}#calibration-feedback.success{color:var(--accent)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(max-width:850px){.brand span{display:none}.site-header{padding:17px 22px;min-height:69px}main{width:calc(100% - 40px)}.intro{display:block;padding:24px 0 14px}.intro p{margin-top:6px;font-size:12px}#measure-panel{grid-template-columns:1fr;grid-template-areas:"meter" "setup" "spectrum";gap:18px}.meter{padding:21px 22px 15px}.setup{padding:22px}.setup .card-heading{margin-bottom:12px}.readout>span:first-child{font-size:64px}.stats{padding-left:16px}.spectrum{padding:21px 20px 16px}.spectrum .card-heading{align-items:flex-start;flex-direction:column;gap:6px}input,select,textarea{font-size:16px}.form-row{gap:13px}.compare-setup{grid-template-columns:1fr;gap:0;padding:22px}.comparison-summary{flex-wrap:wrap;padding:22px}.comparison-summary>.button{width:100%}.section-heading{align-items:flex-start;flex-direction:column}.history-item{flex-direction:column;align-items:flex-start;gap:6px;padding:20px}.history-actions{width:100%;justify-content:space-between}.history-item>div{max-width:100%}}
@media(max-width:440px){.site-header{padding:16px 18px}.brand{font-size:20px}.privacy{font-size:11px}main{width:calc(100% - 28px)}h1{font-size:21px}.tabs{gap:23px;margin-bottom:18px}.tab{font-size:13px}.meter{padding:19px 17px 13px;column-gap:15px;grid-template-columns:minmax(0,1fr) minmax(125px,.8fr)}.meter>.card-heading{margin-bottom:20px}.readout{gap:6px}.readout>span:first-child{font-size:54px}.readout>span:last-child{font-size:11px}.stats{padding-left:13px;gap:13px}.stats strong{font-size:19px}.stats span{font-size:11px}.stats small{font-size:11px}.meter-caption{font-size:11px}.scale{font-size:11px}.setup{padding:20px 18px}.step-tag{font-size:11px}.spectrum{padding:19px 13px 14px}.spectrum-footer{font-size:11px;gap:5px}.spectrum-footer>span:nth-child(2){text-align:center}footer{font-size:11px;flex-wrap:wrap}.method{margin-top:23px}dialog{padding:23px}}
@media(max-width:440px){.meter{grid-template-columns:1fr}.readout{grid-column:1/-1;min-height:65px;flex-wrap:wrap}.readout>span:first-child{font-size:60px}.meter-caption{grid-column:1/-1;margin-bottom:16px}.stats{grid-column:1/-1;grid-row:4;flex-direction:row;justify-content:space-between;border-left:0;border-top:1px solid var(--line);padding:14px 0 16px;gap:10px}.stats>div{display:block}.stats strong{display:block;margin-top:6px;font-size:22px}.stats span{font-size:11px}.stats small{display:inline;margin-left:3px}.level-track{grid-row:5}.scale{grid-row:6}}
.inline-icon{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}.dialog-close .inline-icon{width:20px;height:20px}.method[open] .disclosure-icon{transform:rotate(45deg)}
@media(max-width:440px){.stats>div{display:flex;flex:1;min-width:0;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:0}.stats>div>span{min-height:34px}.stats strong{margin-top:6px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}