/* Native Japanese UI fonts keep the form legible without a display-font download.
   Green is reserved for actions; spacing and rules organize the rest. */
:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Yu Gothic",sans-serif;color:#242725;background:#fff;font-synthesis:none;line-height:1.7;--muted:#626863;--rule:#dfe3df;--accent:#215d43}
*{box-sizing:border-box}body{margin:0;min-height:100svh;display:flex;flex-direction:column}a{color:inherit;text-underline-offset:4px}
header,main,footer{width:min(1080px,calc(100% - 96px));margin-inline:auto}
header{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--rule)}
.brand{font-size:26px;font-weight:650;letter-spacing:-.055em;text-decoration:none}.tag{font-size:12px;color:var(--muted)}
main{flex:1;padding-top:82px;padding-bottom:52px}h1{font-size:clamp(32px,4.5vw,48px);font-weight:500;letter-spacing:-.045em;line-height:1.4;margin:0}
.lead{margin:17px 0 58px;font-size:15px;color:var(--muted)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 218px;gap:76px}.tool{min-width:0}
form{margin:0}label{display:block;font-size:13px;font-weight:600;margin-bottom:12px}.input-row{display:flex;gap:10px}
input{width:100%;min-width:0;flex:1;font:inherit;font-size:15px;height:56px;padding:0 16px;background:#fff;border:1px solid #9fa8a1;border-radius:2px}input::placeholder{color:#737b75;opacity:1}
button{font:inherit;font-size:14px;font-weight:600;min-height:56px;padding:0 24px;white-space:nowrap;color:#fff;background:var(--accent);border:1px solid var(--accent);border-radius:2px;cursor:pointer}button:hover{background:#184832}
button:disabled,[aria-disabled="true"]{opacity:.55;cursor:wait}input:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.hint{margin:12px 0 0;color:var(--muted);font-size:12px}#status{color:var(--muted);font-size:13px;margin:24px 0 0;overflow-wrap:anywhere}#status:empty{margin:0}
.support{border-top:1px solid var(--rule);padding-top:16px}.support h2{margin:0 0 10px;font-size:13px;font-weight:600}.support p{color:var(--muted);font-size:12px;margin:0 0 18px;line-height:1.9}
.video{margin-top:36px}.video h2{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0;padding-bottom:14px;border-bottom:1px solid #242725;font-size:15px;font-weight:600}.video h2 small{color:var(--muted);font-size:11px;font-weight:400}
.quality-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 0;border-bottom:1px solid var(--rule)}.quality-row strong{display:inline;font-size:17px;font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:-.025em}.best{display:inline-block;font-size:11px;margin-left:12px;color:var(--accent);font-weight:500}.quality-row small{display:block;margin-top:2px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.download{display:inline-flex;align-items:center;gap:12px;min-height:44px;padding:0 12px;color:var(--accent);font-size:13px;font-weight:600;text-decoration:none;border-radius:2px}.download::after{content:'↓';font-size:17px;font-weight:400}.download:hover{background:#f1f5f2}
.notice{margin:76px 0 0;max-width:620px;font-size:11px;line-height:1.9;color:var(--muted)}footer{display:flex;justify-content:space-between;align-items:center;gap:24px;border-top:1px solid var(--rule);padding-block:25px;font-size:11px;color:var(--muted)}footer nav{display:flex;flex-wrap:wrap;gap:24px}footer a{text-decoration:none}footer a:hover{text-decoration:underline}
.legal{max-width:720px;padding-top:56px}.legal h1{font-size:30px;margin-bottom:32px}.legal p{font-size:15px;margin-block:24px}
@media(max-width:800px){header,main,footer{width:calc(100% - 48px)}.workspace{grid-template-columns:minmax(0,1fr);gap:48px}.support{max-width:480px}.support p{margin-bottom:10px}.support br{display:none}main{padding-top:56px}.notice{margin-top:40px}}
@media(max-width:480px){header,main,footer{width:calc(100% - 40px)}header{height:76px}.brand{font-size:24px}.tag{font-size:11px}main{padding-top:44px;padding-bottom:36px}h1{font-size:32px}.lead{font-size:13px;max-width:250px;margin:16px 0 36px;line-height:1.9}.input-row{flex-direction:column;gap:12px}input{flex:none;font-size:16px}button{width:100%;min-height:50px}.quality-row{gap:8px;padding:16px 0}.quality-row strong{font-size:15px}.best{display:block;margin-left:0;margin-top:2px}.download{padding-inline:4px;gap:7px;font-size:12px;white-space:nowrap}.workspace{gap:40px}footer{align-items:flex-start;flex-direction:column;gap:16px}footer nav{gap:12px 20px}.legal h1{font-size:26px}}