:root{--bg:#0b0d12;--panel:#12151c;--line:#2a2f3a;--text:#f6f7f9;--muted:#9298a5;--green:#6dffb3;--orange:#ff8f5a;--red:#ff6b6b;--radius:18px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","Noto Sans JP",sans-serif;color-scheme:dark}*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);min-height:100vh;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:48px 48px}.topbar{height:76px;padding:0 max(24px,calc((100vw - 1120px)/2));border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:rgba(11,13,18,.82);backdrop-filter:blur(14px);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font-weight:800;letter-spacing:-.03em}.mark{display:grid;place-items:center;width:32px;height:32px;background:var(--green);color:#07110c;border-radius:8px;font-weight:950}.privacy{font-size:.8rem;color:var(--muted);display:flex;gap:8px;align-items:center}.privacy>span{color:var(--green);font-size:.55rem}main{width:min(1120px,calc(100% - 40px));margin:auto}.intro{padding:88px 0 58px;display:grid;grid-template-columns:1.2fr .8fr;align-items:end;gap:48px}.eyebrow{grid-column:1/-1;color:var(--green);font-size:.76rem;font-weight:800;letter-spacing:.18em;margin:0 0 -18px}.intro h1{font-size:clamp(3rem,7vw,6.3rem);line-height:.93;letter-spacing:-.07em;margin:0;max-width:800px}.intro h1 em{font-style:normal;color:transparent;-webkit-text-stroke:1px var(--green)}.lead{color:var(--muted);font-size:1rem;line-height:1.8;margin:0 0 8px;max-width:430px}.workspace{background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:clamp(22px,4vw,48px);box-shadow:0 30px 80px rgba(0,0,0,.3)}.step-label{font-size:.75rem;letter-spacing:.16em;font-weight:850;color:#c8cbd2;margin-bottom:16px}.step-label span{color:var(--green);margin-right:10px}.option-title{margin-top:38px}.dropzone{height:220px;border:1px dashed #4b5260;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;cursor:pointer;transition:.2s;background:#0e1117}.dropzone:hover,.dropzone.drag{border-color:var(--green);background:#101a17;transform:translateY(-2px)}.upload-icon{display:grid;place-items:center;width:46px;height:46px;border:1px solid #3a414d;border-radius:50%;font-size:1.6rem;color:var(--green);margin-bottom:4px}.dropzone strong{font-size:1.05rem}.dropzone>span:not(.upload-icon){font-size:.88rem;color:var(--muted)}.dropzone small{color:#656c78;font-size:.72rem;letter-spacing:.1em;margin-top:8px}.file-card{display:flex;align-items:center;padding:18px;border:1px solid var(--line);border-radius:14px;background:#0e1117}.file-glyph{width:42px;height:42px;display:grid;place-items:center;background:#18221e;color:var(--green);border-radius:10px;margin-right:14px}.file-info{display:flex;flex-direction:column;min-width:0}.file-info strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-info span{color:var(--muted);font-size:.8rem;margin-top:4px}.icon-button{margin-left:auto;border:0;background:none;color:var(--muted);font-size:1.5rem;cursor:pointer;padding:8px}.mode-card{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--green);box-shadow:inset 0 0 0 1px var(--green);background:#101a17;border-radius:14px;padding:18px 20px;margin-bottom:28px}.mode-card>div{display:flex;flex-direction:column}.mode-card strong{font-size:.98rem}.mode-card div span{color:var(--muted);font-size:.8rem;margin-top:4px}.mode-state{color:#07110c;background:var(--green);padding:5px 9px;border-radius:7px;font-size:.65rem;font-weight:900;letter-spacing:.08em}.convert,.download-btn{width:100%;border:0;border-radius:14px;padding:20px 22px;background:var(--green);color:#07110c;font-size:1rem;font-weight:900;display:flex;justify-content:center;position:relative;cursor:pointer;transition:.2s}.convert:not(:disabled):hover,.download-btn:hover{filter:brightness(1.08);transform:translateY(-1px)}.convert:disabled{background:#282d35;color:#707783;cursor:not-allowed}.button-code{position:absolute;right:22px;opacity:.55}.progress-wrap,.result-panel,.error{margin-top:22px;border-radius:14px;padding:20px}.progress-wrap{background:#0e1117;border:1px solid var(--line)}.progress-row{display:flex;justify-content:space-between;font-size:.88rem}.progress-track{height:6px;background:#282e38;border-radius:9px;overflow:hidden;margin:14px 0}.progress-track span{display:block;width:0;height:100%;background:var(--green);transition:width .2s}.progress-wrap p{margin:0;color:var(--muted);font-size:.78rem}.error{border:1px solid #693838;background:#211315;color:#ffb1b1}.result-panel{border:1px solid #2a6c4d;background:#101c17}.result-head{display:flex;align-items:center;gap:14px}.result-head>div{display:flex;flex-direction:column}.result-head>div span{color:var(--muted);font-size:.8rem;margin-top:3px}.check{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--green);color:#07110c;font-weight:900}.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:20px 0}.stats div{padding:14px 10px;border-right:1px solid var(--line);text-align:center}.stats div:last-child{border:0}.stats span,.stats strong{display:block}.stats span{font-size:.7rem;color:var(--muted)}.stats strong{font-size:.86rem;margin-top:3px}.again-btn{display:block;margin:14px auto 0;border:0;background:none;color:var(--muted);text-decoration:underline;cursor:pointer}.notes{padding:74px 0}.notes>.eyebrow{margin:0 0 12px}.notes h2{font-size:clamp(1.8rem,4vw,3rem);letter-spacing:-.05em;margin:0 0 30px}.note-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.note-grid article{padding:26px 24px 14px 0;border-right:1px solid var(--line)}.note-grid article+article{padding-left:24px}.note-grid article:last-child{border-right:0}.note-grid article>span{color:var(--orange);font-size:.72rem;font-weight:850;letter-spacing:.08em}.note-grid h3{font-size:1rem;margin:12px 0 8px}.note-grid p{color:var(--muted);line-height:1.7;font-size:.86rem;margin:0}.warning{display:grid;grid-template-columns:170px 1fr;gap:24px;border:1px solid #5b483d;background:#1b1614;border-radius:14px;padding:20px 22px;margin-top:26px}.warning strong{color:var(--orange)}.warning p{color:var(--muted);font-size:.84rem;margin:0}footer{width:min(1120px,calc(100% - 40px));margin:auto;padding:24px 0 38px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:#656c78;font-size:.73rem;letter-spacing:.06em}@media(max-width:720px){.privacy{font-size:0}.privacy:after{content:"端末内処理";font-size:.75rem}.intro{padding:58px 0 38px;grid-template-columns:1fr;gap:26px}.eyebrow{margin:0}.intro h1{font-size:clamp(3rem,15vw,5rem)}.dropzone{height:190px}.mode-card{align-items:flex-start;gap:15px}.stats{grid-template-columns:1fr 1fr}.stats div:nth-child(2){border-right:0}.stats div:nth-child(-n+2){border-bottom:1px solid var(--line)}.note-grid{grid-template-columns:1fr}.note-grid article,.note-grid article+article{padding:20px 0;border-right:0;border-bottom:1px solid var(--line)}.warning{grid-template-columns:1fr}footer{flex-direction:column;gap:8px}}
.stats.five{grid-template-columns:repeat(5,1fr)}
@media(max-width:720px){.stats.five{grid-template-columns:1fr 1fr}.stats.five div{border-bottom:1px solid var(--line)}.stats.five div:nth-child(even){border-right:0}.stats.five div:last-child{grid-column:1/-1;border-bottom:0}}

.secondary-download{margin-top:10px;background:#20262f;color:var(--text);border:1px solid var(--line)}

.decision-panel{margin:0 0 28px;border:1px solid #5b483d;background:#1b1614;border-radius:14px;padding:20px}.decision-panel>strong{display:block;color:#ffd1b8;font-size:1rem;margin-bottom:8px}.decision-panel p{color:var(--muted);font-size:.86rem;line-height:1.65;margin:0 0 16px}.decision-panel small{display:block;color:#787f8b;font-size:.72rem;margin-top:12px}.decision-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.decision-actions .download-btn{margin:0;padding:15px 14px}.choice-secondary{border:1px solid var(--line);border-radius:14px;background:#20262f;color:var(--text);font-weight:800;padding:15px 14px;cursor:pointer}.choice-secondary:hover{filter:brightness(1.08)}#etaText{color:var(--green);font-weight:750}@media(max-width:620px){.decision-actions{grid-template-columns:1fr}}

.usage-counter{display:inline-flex;align-items:center;gap:8px;margin-top:14px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:#0e1117;color:var(--muted);font-size:.78rem}.usage-counter strong{color:var(--text);font-variant-numeric:tabular-nums}.usage-counter.offline{opacity:.5}