:root{color-scheme:light;--ink:#202a24;--muted:#536159;--line:#d9e0dc;--soft:#f3f5f4;--green:#15803d;--danger:#a32727}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:16px;font-weight:500;line-height:1.85}button,input,select{font:inherit}a{color:inherit;text-decoration:underline;text-underline-offset:4px}a:hover{text-decoration-thickness:2px}[hidden]{display:none!important}:focus-visible{outline:3px solid #166534;outline-offset:4px}.skip-link{position:absolute;left:1rem;top:-5rem;z-index:2;padding:.5rem 1rem;background:white}.skip-link:focus{top:1rem}.site-header{max-width:1120px;margin:auto;padding:1.2rem 2rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid var(--line)}.brand{font-size:1.4rem;font-weight:750;text-decoration:none;letter-spacing:-.03em}.language-label{display:flex;gap:.65rem;align-items:center;font-size:.8rem;color:var(--muted)}select{padding:.4rem;border:1px solid var(--line);border-radius:5px;background:white;color:var(--ink)}main{max-width:1040px;margin:0 auto;padding:2.8rem 2rem 4rem}.intro{max-width:760px}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.3;letter-spacing:-.025em;margin:0 0 .65rem}h2{font-size:1.4rem;line-height:1.5;margin:0}h3{font-size:1.08rem;margin:1.5rem 0 .5rem}p{margin:.65rem 0 1rem}.intro-lead{font-size:clamp(1.1rem,2.5vw,1.4rem);font-weight:700;margin:.5rem 0 1.2rem}.help-links{font-size:.92rem}.workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:0;margin:2rem 0;list-style:none;border-block:1px solid var(--line)}.workflow li{padding:1rem .4rem}.workflow a{display:flex;gap:.6rem;align-items:center;text-decoration:none;font-size:.9rem}.step-number{display:inline-flex;flex-shrink:0;align-items:center;justify-content:center;width:1.8rem;height:1.8rem;border-radius:50%;background:var(--soft);font-size:.9rem;font-weight:750}.connection-status{background:var(--soft);padding:1.2rem 1.4rem;margin:1.5rem 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img{display:block;max-width:100%;height:auto;margin-top:1rem}.field{margin:1.4rem 0}.field label{display:block;font-weight:700}.field-row input{width:12rem;min-width:0;flex:0 1 13rem;padding:.6rem .7rem;border:1px solid #87998e;border-radius:5px;background:#fff;color:var(--ink)}.field-row input:disabled{background:var(--soft)}.field-row input[type=url]{flex:1 1 20rem}.invalid-feedback{display:none;color:var(--danger);font-size:.9rem}.field:has(.is-invalid) .invalid-feedback{display:block}.is-invalid{border-color:var(--danger)!important}.delete-data{padding-top:1rem;border-top:1px solid var(--line)}.delete-data summary{cursor:pointer}.empty-state{padding:1.5rem;background:var(--soft);color:var(--muted);border-radius:6px}.chart{padding:1rem 0;overflow-x:auto}.chart>div{min-width:250px}.c3 text{font-family:inherit;fill:var(--ink)}.beacon-readings{padding:1rem 0}.beacon-readings dl{display:flex;gap:2rem;flex-wrap:wrap;margin:1rem 0}.beacon-readings dt{color:var(--muted)}.beacon-readings dd{font-size:1.6rem;font-weight:700;margin:0}#alertBox,#alert-controller{padding:.8rem 1rem;background:#fff5e8;border-radius:6px;color:#66430d}#alertBox p{margin:0}#text-get-data-status{font-weight:700}footer{max-width:1040px;margin:auto;padding:1.5rem 2rem 2.5rem;color:var(--muted);font-size:.85rem}footer>a{margin-right:1.5rem}footer p{margin-top:1rem}.spinner-border{display:inline-block;width:1em;height:1em;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:600px){.site-header{padding:1rem 1.2rem;align-items:flex-start}.language-label{flex-direction:column;align-items:flex-start;gap:.1rem}main{padding:2rem 1.2rem 3rem}.workflow{grid-template-columns:repeat(2,minmax(0,1fr))}.workflow li{padding:.8rem .2rem}.workflow a{font-size:.82rem;gap:.45rem}.step{padding:1.6rem 0}.step-heading{gap:.6rem}h2{font-size:1.18rem}.button{width:100%}.field-row input{flex:1 1 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/* Keep the first connection action within the initial desktop viewport. */
main{padding-top:1.5rem}.app-caption{font-size:.9rem;color:var(--muted);margin:0 0 .3rem}.intro h1{font-size:clamp(1.9rem,4.6vw,2.6rem)}.intro>p:not(.intro-lead):not(.app-caption){font-size:.93rem;line-height:1.7;margin:.5rem 0}.intro-lead{margin:.3rem 0 .7rem;font-size:1.15rem}.workflow{margin:1rem 0}.workflow li{padding:.7rem .4rem}.connection-status{margin:1rem 0;padding:.9rem 1.2rem}#connect-step{padding-top:1.3rem}#connect-step .action-row{margin:.7rem 0}