#root{flex-direction:column;flex:1;min-height:100vh;display:flex}#root>main{flex:1}.hero{text-align:center;padding:42px 0 28px}.hero h1{letter-spacing:-2.1px;font-size:clamp(34px,4.4vw,54px);line-height:1.1}.hero h1 span{color:var(--blue)}.hero p{color:var(--muted);max-width:610px;margin:19px auto 0;font-size:16px}.explore-form{max-width:850px;margin:0 auto 24px}.explore-form label{color:#405675;margin-bottom:7px;font-size:13px;font-weight:650;display:block}.input-row{gap:12px;display:flex}.input-row input{font-variant-numeric:tabular-nums;width:100%;min-width:0;color:var(--ink);background:#fff;border:1px solid #becbdd;border-radius:8px;padding:13px 17px;font-size:22px}.input-row .btn{flex-shrink:0;padding:14px 23px;font-size:15px}.examples{color:var(--muted);flex-wrap:wrap;align-items:center;gap:18px;margin-top:10px;font-size:12px;display:flex}.examples button{color:var(--blue);text-underline-offset:3px;background:0 0;border:0;padding:3px 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5px}.digit-tile>span{font-variant-numeric:tabular-nums;font-size:27px;font-weight:700;line-height:1.3}.digit-tile small{opacity:.85;font-size:9px;font-weight:500;line-height:1.3;display:block}.group-name{color:var(--tone);overflow-wrap:anywhere;margin-top:6px;font-size:12px;font-weight:600}.tone-blue{--tone:#2868d7;--tone-bg:#eef4ff;--tone-border:#d4e3ff}.tone-green{--tone:#28734e;--tone-bg:#edf7ef;--tone-border:#d2e9d9}.tone-orange{--tone:#b45424;--tone-bg:#fff2e9;--tone-border:#f5d9c6}.tone-purple{--tone:#7750bf;--tone-bg:#f4edff;--tone-border:#e2d5fa}.comparison{color:#52647f;margin-bottom:17px;font-size:14px}.more-details{background:var(--soft);border-radius:8px}.more-details summary{color:#3c5577;cursor:pointer;padding:12px 16px;font-size:13px;font-weight:650}.details-content{padding:4px 18px 20px;font-size:14px}.details-content h3{margin:20px 0 10px;font-size:15px}.details-content p{color:#52647f;margin-top:14px}.extra-facts{flex-wrap:wrap;gap:22px;display:flex}.extra-facts 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24px;display:grid}.type-check{border:1px solid var(--border);cursor:pointer;border-radius:10px;align-items:flex-start;gap:10px;padding:16px;display:flex}.type-check.selected{background:var(--soft);border-color:#a7c2ef}.type-check-label{font-size:14px;font-weight:650}.type-check-desc{color:var(--muted);font-size:12px}input[type=checkbox]{accent-color:var(--blue);margin-top:5px}.ws-preview{margin-top:24px}.ws-preview-header{border-bottom:1px solid var(--border);padding-bottom:20px}.ws-preview-title{font-size:22px;font-weight:700}.ws-preview-meta{flex-wrap:wrap;gap:24px;margin-top:12px;font-size:13px;display:flex}.ws-q-row{border-bottom:1px solid var(--border);gap:16px;padding:20px 0;display:flex}.ws-q-num{color:var(--blue);font-weight:650}.ws-q-text{overflow-wrap:anywhere;font-size:14px}.ws-q-line{border-bottom:1px solid var(--border);margin-top:24px}.ws-q-answer{color:#28734e;margin-top:8px}.print-btn-row{justify-content:flex-start;margin-top:24px}.loading-message{padding:50px 0}@media (width<=900px){.digit-groups{gap:15px}.digit-tile{min-width:38px;padding:6px}.learning-grid{grid-template-columns:repeat(2,1fr)}.number-ladder,.number-ladder li{gap:8px}.number-ladder strong{font-size:12px}.number-ladder a{padding:16px 5px}}@media (width<=700px){.hero{padding:25px 0 24px}.hero h1{letter-spacing:-1.3px;font-size:34px}.hero p{max-width:330px;margin-top:15px;font-size:14px;line-height:1.55}.input-row{flex-direction:column;gap:10px}.input-row input{padding:12px 14px;font-size:21px}.input-row .btn{width:100%;min-height:48px;padding:12px}.examples{gap:7px 14px;font-size:11px}.examples>span{width:100%}.examples button{font-size:11px}.input-help{margin-top:8px}.explore-form{margin-bottom:20px}.number-result{padding:20px 18px}.result-top{flex-wrap:wrap;align-items:flex-start;gap:10px;margin-bottom:14px}.result-top h2{font-size:12px}.copy-actions{gap:6px}.copy-actions .btn{min-height:32px;padding:6px 9px;font-size:11px}.copy-actions 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