:root{color-scheme:light dark;--bg:#f5f7f9;--surface:#fff;--text:#202e3c;--muted:#566677;--brand:#176858;--brand-soft:#e9f4ef;--border:#d7e0e5;--result:#f1f7f5;--warning:#9b431b;--shadow:0 5px 18px #18382b08}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Yu Gothic UI",sans-serif;line-height:1.8;overflow-wrap:anywhere}a{color:var(--brand);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}button,input,select,textarea{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--brand);outline-offset:3px}.container{width:min(100% - 32px,760px);margin-inline:auto}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.header-inner{padding:18px 0 12px}.brand{font-size:1.12rem;font-weight:800;text-decoration:none;color:var(--text)}.site-nav{display:flex;gap:8px 20px;flex-wrap:wrap;margin-top:8px;font-size:.85rem}.site-nav a{text-decoration:none}main{padding:24px 0 48px;min-height:60vh}.breadcrumb{font-size:.8rem;color:var(--muted);margin-bottom:20px}.breadcrumb span{margin:0 8px}.eyebrow{color:var(--brand);font-size:.78rem;font-weight:700;letter-spacing:.12em;margin:0 0 8px}h1{font-size:clamp(1.65rem,5.5vw,2.2rem);line-height:1.4;margin:0 0 16px;letter-spacing:.02em}h2{font-size:1.25rem;line-height:1.5;margin:0 0 16px}h3{font-size:1rem;line-height:1.6;margin:24px 0 8px}p{margin:0 0 16px}.lead{color:var(--muted);margin-bottom:28px}.hero{padding:12px 0 22px}.pill{display:inline-block;font-size:.78rem;color:var(--brand);background:var(--brand-soft);border-radius:30px;padding:4px 12px;margin:0 6px 8px 0}.tool,.mini-tool,.content-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:22px;margin-bottom:22px;box-shadow:var(--shadow)}.tool h2{font-size:1.1rem}.fields{display:grid;gap:18px}.field{min-width:0}label,.field-label{display:block;font-size:.9rem;font-weight:650;margin-bottom:7px}input:not([type=radio]),select,textarea{display:block;width:100%;min-width:0;max-width:100%;min-height:48px;font-size:16px;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 12px}input[type=date]{width:100%;min-width:0;min-height:48px}textarea{min-height:220px;resize:vertical}fieldset{min-width:0;margin:0;padding:12px;border:1px solid var(--border);border-radius:8px}legend{font-size:.9rem;font-weight:650;padding:0 4px}.radio-label{font-weight:400;display:flex;align-items:center;gap:10px;margin:6px 0;min-height:36px}.radio-label input{width:19px;height:19px;accent-color:var(--brand);flex-shrink:0}.help{font-size:.8rem;color:var(--muted);margin:8px 0 0}.result-grid{display:grid;gap:12px;margin-top:22px}.result-item{padding:15px 16px;border-radius:10px;background:var(--result);min-width:0}.result-label{display:block;color:var(--muted);font-size:.8rem;margin-bottom:3px}.result-value{display:block;font-size:1.3rem;font-weight:750;line-height:1.6;font-variant-numeric:tabular-nums}.result-item.primary{background:var(--brand-soft);border:1px solid var(--border)}.result-item.primary .result-value{color:var(--brand);font-size:1.7rem}.message{font-size:.85rem;color:var(--warning);margin:12px 0 0;min-height:0}.message:empty{display:none}.breakdown{font-size:.9rem;margin:18px 0 0}.breakdown:empty{display:none}button{background:var(--brand);color:#fff;border:0;border-radius:8px;min-height:44px;padding:8px 18px;cursor:pointer;margin-top:12px;font-weight:650}button:hover{filter:brightness(.92)}.explanation,.how-to,.related{margin:32px 0}.explanation p{line-height:1.95}.how-to ol{padding-left:1.5em}.how-to li{padding-left:3px;margin:6px 0}.related-links{display:flex;gap:10px;flex-wrap:wrap}.related-links a{padding:8px 13px;border:1px solid var(--border);border-radius:8px;text-decoration:none;background:var(--surface);font-size:.9rem}.category{margin:24px 0 34px;scroll-margin-top:20px}.card-grid{display:grid;gap:14px}.tool-link{display:block;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;text-decoration:none;color:var(--text);box-shadow:var(--shadow);transition:border-color .15s,transform .15s}.tool-link:hover{border-color:var(--brand);transform:translateY(-2px)}.tool-link strong{font-size:1.04rem;color:var(--brand);display:block;margin-bottom:6px}.tool-link p{font-size:.85rem;color:var(--muted);margin:0}.table-wrap{max-width:100%;overflow-x:auto;border:1px solid var(--border);border-radius:10px;margin:18px 0}table{border-collapse:collapse;width:100%;font-size:.85rem;white-space:nowrap}th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}th{background:var(--brand-soft);font-weight:650}tbody tr:nth-child(even){background:var(--result)}caption{padding:12px;text-align:left;white-space:normal;color:var(--muted)}.unit-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:18px}.unit-result{background:var(--result);border-radius:8px;padding:12px}.unit-result span{display:block;font-size:.78rem;color:var(--muted)}.unit-result output{display:block;font-weight:700;font-size:.95rem}.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:30px 0}.footer-tools{display:grid;gap:20px}.footer-group strong{display:block;font-size:.85rem;margin-bottom:8px}.footer-group a{display:inline-block;font-size:.8rem;margin-right:14px;margin-bottom:7px}.footer-legal{border-top:1px solid var(--border);padding-top:20px;margin-top:20px;display:flex;gap:12px 18px;flex-wrap:wrap;font-size:.8rem}.copyright{font-size:.75rem;color:var(--muted);margin:18px 0 0}.ad-slot:empty{display:none}.skip-link{position:absolute;top:-100px;left:16px;z-index:9;background:var(--surface);padding:10px}.skip-link:focus{top:8px}.noscript{border:1px solid var(--border);padding:12px;color:var(--warning)}.sources{font-size:.8rem;color:var(--muted)}
@media(min-width:600px){.header-inner{display:flex;justify-content:space-between;gap:12px;align-items:center}.site-nav{margin:0;gap:12px}.brand{font-size:1.1rem}.fields,.card-grid,.result-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.fields.three{grid-template-columns:repeat(3,minmax(0,1fr))}.result-item.wide{grid-column:1/-1}.tool,.mini-tool{padding:28px}.footer-tools{grid-template-columns:repeat(2,minmax(0,1fr))}.unit-results{grid-template-columns:repeat(3,minmax(0,1fr))}main{padding-top:32px}.hero{padding-top:28px}}
@media(prefers-color-scheme:dark){:root{--bg:#141e25;--surface:#1c2933;--text:#e7edf1;--muted:#b1bfc9;--brand:#86d7bd;--brand-soft:#263f3b;--border:#40515d;--result:#23343b;--warning:#ffc192;--shadow:none}button{background:#86d7bd;color:#142c25}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tool-link{transition:none}}
/* PDF tools: scoped controls keep the calculator DOM and behavior intact. */
.privacy-box{padding:14px 16px;border:1px solid var(--brand);border-radius:10px;background:var(--brand-soft);color:var(--brand);font-weight:650;font-size:.9rem}.pdf-tool>label,.pdf-tool>select,.pdf-tool>input,.pdf-tool>fieldset{margin-top:12px}#drop-zone{border:2px dashed var(--border);border-radius:10px;padding:14px;margin-bottom:18px}.pdf-tool input[type=file]{padding:8px;font-size:16px}.pdf-tool input[type=file]::file-selector-button{max-width:100%;white-space:normal}.pdf-tool .check-label,.pdf-tool .page-item label{display:flex;align-items:center;gap:6px}.pdf-tool input[type=checkbox]{width:20px;min-height:20px;height:20px;flex-shrink:0}.pdf-tool button:disabled{opacity:.45;cursor:default}.file-item{padding:14px;background:var(--result);border:1px solid var(--border);border-radius:10px;margin:12px 0;min-width:0}.file-item img{max-width:140px;max-height:160px;object-fit:contain}.file-item button,.page-item button{margin:4px;padding:6px 10px}.actions{display:flex;flex-wrap:wrap;gap:6px}#page-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;margin:20px 0}.page-item{min-width:0;background:var(--result);border:1px solid var(--border);border-radius:10px;padding:10px;text-align:center}.preview{display:flex;align-items:center;justify-content:center;min-height:170px;margin:14px 0;transition:transform .15s}.preview canvas{max-width:100%;max-height:180px;object-fit:contain}.page-item.is-deleted{opacity:.45;background:repeating-linear-gradient(135deg,var(--result) 0 12px,var(--border) 12px 14px)}#pdf-result{display:grid;gap:12px;margin-top:16px}.pdf-download{padding:12px;border:1px solid var(--brand);border-radius:8px;display:block;background:var(--brand-soft);overflow-wrap:anywhere}.pdf-download img{display:block;max-width:150px;max-height:180px;margin-bottom:8px}.footer-tools{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-group a{display:block}.site-nav{gap:6px 12px}

/* ファイル入力はフォーカス可能なまま視覚的に隠す（iOS 対応）。 */
.pdf-tool .file-picker {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--brand);
  color: var(--surface);
  font-weight: 700;
  cursor: pointer;
}
.pdf-tool .file-picker input[type=file] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  min-height: 0;
  padding: 0;
  border: 0;
}
.file-picker:focus-within { outline: 3px solid var(--text); outline-offset: 3px; }
.file-picker:has(input:disabled) { opacity: .45; cursor: default; }
.selected-files { overflow-wrap: anywhere; margin: 12px 0; }

/* PDF内検索: ページは白のまま、操作欄と一覧はサイトのテーマに合わせる。 */
.pdf-search-tool{position:relative;min-width:0}
.pdf-search-tool [hidden]{display:none}
.search-toolbar{position:sticky;top:0;z-index:5;display:grid;gap:8px;background:var(--surface);padding:12px 0;border-bottom:1px solid var(--border)}
.pdf-search-tool .check-label{font-size:.8rem;margin:8px 0;min-height:30px}
.search-navigation{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.search-navigation button{margin:0;flex:0 0 auto}
#match-count{flex:1;text-align:center;font-weight:700;font-variant-numeric:tabular-nums}
#keyword-summary{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.keyword-chip{display:inline-flex;align-items:center;gap:6px;max-width:100%;font-size:.8rem;border:1px solid var(--border);border-radius:20px;padding:4px 10px;overflow-wrap:anywhere}
.keyword-swatch{width:14px;height:14px;border:1px solid #555;flex-shrink:0;border-radius:3px}
#result-list{max-height:280px;overflow-y:auto;overscroll-behavior:contain;margin-bottom:16px}
#result-list:empty{display:none}
@media(max-width:599px){#result-list{max-height:200px}}
#result-list .result-item{display:flex;gap:10px;align-items:baseline;width:100%;margin:6px 0;text-align:left;color:var(--text);font-size:.85rem;font-weight:400;border:1px solid var(--border);background:var(--result);padding:10px}
#result-list .result-item.is-current{border-color:var(--brand);box-shadow:inset 3px 0 var(--brand)}
.result-page{flex-shrink:0;font-weight:700}
#result-list mark{color:#17252c;border-radius:2px;padding:0 1px}
#viewer{width:100%;max-width:800px;margin:16px auto;min-width:0}
.pdf-page{position:relative;margin:0 auto 20px;background:white;color:#202e3c;max-width:100%;overflow:hidden;box-shadow:0 2px 8px #0002;isolation:isolate}
.pdf-page>canvas{display:block;position:absolute;inset:0;max-width:100%}
.pdf-page .hit-layer{position:absolute;inset:0;pointer-events:none;z-index:2;mix-blend-mode:multiply}
.pdf-page .hit{position:absolute;opacity:.5}
.pdf-page .hit.current{background:#ff9800!important;opacity:.65}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
/* pdf.js TextLayer (Apache-2.0): CSSネストを展開。文字の拡大率はviewport.scale。 */
.pdf-page .textLayer{color-scheme:only light;position:absolute;text-align:initial;inset:0;overflow:hidden;opacity:1;line-height:1;letter-spacing:normal;word-spacing:normal;-webkit-text-size-adjust:none;text-size-adjust:none;forced-color-adjust:none;transform-origin:0 0;caret-color:#202e3c;z-index:1;--min-font-size:1;--text-scale-factor:calc(var(--total-scale-factor) * var(--min-font-size));--min-font-size-inv:calc(1 / var(--min-font-size))}
.pdf-page .textLayer span,.pdf-page .textLayer br{color:transparent;position:absolute;white-space:pre;cursor:text;transform-origin:0% 0%;-webkit-user-select:text;user-select:text}
.pdf-page .textLayer> :not(.markedContent),.pdf-page .textLayer .markedContent span:not(.markedContent){z-index:1;--font-height:0;font-size:calc(var(--text-scale-factor) * var(--font-height));--scale-x:1;--rotate:0deg;transform:rotate(var(--rotate)) scaleX(var(--scale-x)) scale(var(--min-font-size-inv))}
.pdf-page .textLayer .markedContent{display:contents}
.pdf-page .textLayer span[role="img"]{-webkit-user-select:none;user-select:none;cursor:default}
.pdf-page .textLayer ::selection{background:rgba(0,100,255,.25);color:transparent}
.pdf-page .textLayer br::selection{background:transparent}
.pdf-page .textLayer .endOfContent{display:block;position:absolute;inset:100% 0 0;z-index:0;cursor:default;-webkit-user-select:none;user-select:none}
.pdf-page .textLayer.selecting .endOfContent{top:0}
.pdf-page .textLayer[data-main-rotation="90"]{transform:rotate(90deg) translateY(-100%)}
.pdf-page .textLayer[data-main-rotation="180"]{transform:rotate(180deg) translate(-100%,-100%)}
.pdf-page .textLayer[data-main-rotation="270"]{transform:rotate(270deg) translateX(-100%)}