:root{color-scheme:light;--ink:#33313f;--muted:#66616d;--line:#e2d9d1;--accent:#a64211;--soft:#fff3e6;--page:#fffaf5;font:16px/1.6 system-ui,-apple-system,"Segoe UI","Noto Sans JP",sans-serif;color:var(--ink);background:var(--page)}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0}a{color:#984011;text-underline-offset:3px}button,.button,input,select{font:inherit}button,.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 16px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);text-decoration:none;cursor:pointer}button.primary,.button.primary{background:var(--accent);color:white;border-color:var(--accent)}button:disabled{opacity:.5;cursor:not-allowed}:focus-visible{outline:3px solid #306ed7;outline-offset:3px}input,select{width:100%;min-height:44px;background:white;border:1px solid #b9afa6;border-radius:8px;padding:8px 10px;color:var(--ink)}input[type=color]{padding:4px;max-width:120px}label{display:block;margin-bottom:16px;font-weight:600}label select,label input{display:block;margin-top:5px}fieldset{padding:0;border:0;margin:0}fieldset:disabled{opacity:.65}h1{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.3;margin:14px 0}h2{font-size:1.18rem;margin:0 0 16px}p{margin:10px 0}.small,footer{font-size:.84rem;color:var(--muted)}.panel{background:white;border:1px solid var(--line);border-radius:16px;padding:22px;min-width:0}.page-head{max-width:1250px;margin:auto;padding:24px 20px 12px}.converter{max-width:1250px;margin:auto;padding:10px 20px 30px;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(290px,1fr);gap:20px;align-items:start}.inputs{grid-column:1;grid-row:1}.options{grid-column:2;grid-row:1}.explanations{grid-column:1/-1}.step{display:inline-grid;place-items:center;width:29px;height:29px;background:var(--soft);color:var(--accent);border-radius:50%}.drop-zone{border:2px dashed var(--line);border-radius:12px;background:var(--page);padding:20px;text-align:center}.drop-zone label{width:max-content;margin:0 auto}.drop-zone.dragging{border-color:var(--accent);background:var(--soft)}#files{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}#files:focus-visible+.small{outline:3px solid #306ed7}.drop-zone:focus-within{outline:3px solid #306ed7;outline-offset:3px}.notice{background:var(--soft);border-radius:8px;padding:10px;white-space:pre-line;overflow-wrap:anywhere}.notice:empty,.error:empty{display:none}.error{color:#a62323}.file-list{padding:0;list-style:none;margin:12px 0;display:grid;gap:8px}.file-row{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:9px;min-width:0}.file-text{flex:1;min-width:0}.filename{display:block;font-weight:600;overflow-wrap:anywhere}.file-description{display:block;font-size:.8rem;color:var(--muted)}.file-remove,.file-save{padding:6px 12px;flex-shrink:0}.actions{display:flex;flex-wrap:wrap;gap:10px;margin:15px 0}progress{width:100%;accent-color:var(--accent)}details{border-top:1px solid var(--line);padding-top:12px}summary{cursor:pointer;font-weight:600;min-height:44px}.home{max-width:870px;margin:70px auto;padding:20px}.eyebrow{letter-spacing:.13em;font-weight:700;color:var(--accent)}.lead{margin-bottom:30px}.entry{display:flex;gap:20px;align-items:center;text-decoration:none;color:var(--ink);margin-bottom:24px}.entry h2{margin:0}.entry-symbol{font-size:2.7rem;color:var(--accent)}.entry:hover{border-color:var(--accent)}footer{max-width:1250px;margin:auto;padding:10px 20px 30px;border-top:1px solid var(--line)}.legal{max-width:850px;margin:30px auto;padding:20px}.legal section{margin:20px 0}.test-output{white-space:pre-wrap;overflow-wrap:anywhere;padding:16px;background:white;border:1px solid var(--line)}@media(max-width:760px){.converter{display:flex;flex-direction:column;padding:10px 12px 25px;gap:14px}.converter>.panel{width:100%}.panel{padding:16px}.page-head{padding:20px 12px 8px}.home{margin:25px auto}.entry{gap:12px}.entry-symbol{font-size:2rem}}@media(max-width:440px){.file-row{flex-wrap:wrap}.file-text{flex-basis:100%}.file-remove{margin-left:auto}.actions>*{flex:1}.actions{gap:8px}}