@font-face{font-family:DM;src:url(/assets/dm-sans.woff2) format("woff2");font-display:swap;font-weight:100 1000}:root{font-family:DM,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:#202020;background:#eee;--ink:#202020;--muted:#717171;--line:#d0d0d0;--accent:#2949e8;--surface:#f8f8f6;--gutter:max(24px, calc((100% - 880px)/2) );font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select{font:inherit;color:inherit}button,a,select{cursor:pointer}button{border:0}a{color:inherit;text-decoration:none}::selection{background:#f2ee70}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.skip-link{position:fixed;left:16px;top:12px;padding:12px 18px;background:var(--ink);color:#fff;z-index:10;transform:translateY(-160%)}.skip-link:focus{transform:none}main{padding:70px var(--gutter) 100px}.eyebrow{margin:0 0 16px;color:var(--muted);font-size:10px;letter-spacing:.12em}.tool h1,.explanation h2{margin:0;line-height:1;letter-spacing:-.055em}.tool h1{font-size:clamp(52px,8vw,86px)}.explanation h2{font-size:clamp(42px,6vw,64px)}h1 span,h2 span{color:var(--accent)}.subtitle{margin:22px 0 42px;color:var(--muted);font-size:15px}.drop-zone{min-height:280px;border:1px solid var(--line);background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;text-align:center;padding:32px;transition:border-color .2s,background .2s}.drop-zone.dragging{border-color:var(--accent);background:#edf0ff}.drop-zone>svg{color:var(--accent)}.drop-zone>strong{font-size:19px}.drop-zone>button{min-height:44px;padding:0 22px;background:transparent;border:1px solid var(--ink);font-size:13px}.drop-zone>button:hover{background:var(--ink);color:#fff}.drop-zone>input{position:absolute;width:1px;height:1px;opacity:0}.file-card{width:100%;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:16px;text-align:left}.file-card>svg{color:var(--accent)}.file-card div{display:grid;gap:5px;min-width:0}.file-card strong{overflow-wrap:anywhere}.file-card span{font-size:12px;color:var(--muted)}.file-card button{width:44px;height:44px;background:transparent;display:grid;place-items:center}.actions{display:grid;grid-template-columns:auto 150px 1fr;align-items:center;margin-top:12px;border:1px solid var(--line);background:var(--surface)}.actions label{font-size:12px;padding-left:20px}.actions select{height:58px;border:0;border-left:1px solid var(--line);background:#fff;padding:0 16px;font-weight:650}.primary{height:58px;background:var(--ink);color:#fff;font-weight:700}.primary:hover:not(:disabled){background:var(--accent)}.primary:disabled{opacity:.38;cursor:not-allowed}.progress{height:2px;background:var(--line);margin-top:18px}.progress i{display:block;height:2px;background:var(--accent);transform-origin:left;transition:transform .2s}.progress span{display:block;margin-top:8px;color:var(--muted);font-size:11px}.download{display:flex;align-items:center;justify-content:center;min-height:54px;margin-top:32px;border:1px solid var(--ink);font-weight:650}.download:hover{border-color:var(--accent);color:var(--accent)}.error{color:#a02626;font-size:13px}.explanation{margin-top:120px;padding-top:58px;border-top:1px solid var(--line)}.explanation-grid{display:grid;grid-template-columns:1fr 1fr;margin-top:34px;border-top:1px solid var(--line)}.explanation-grid p{display:grid;grid-template-columns:auto 1fr;gap:14px;margin:0;padding:26px 24px 26px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px;line-height:1.75}.explanation-grid p:nth-child(odd){border-right:1px solid var(--line)}.explanation-grid p:nth-child(2n){padding-left:24px}.explanation-grid svg{color:var(--accent);margin-top:3px}.explanation-grid strong{display:block;color:var(--ink);font-size:14px;margin-bottom:3px}.explanation-grid code{font:12px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink);background:#ddd;padding:2px 5px}@media(max-width:640px){main{padding-top:44px}.subtitle{line-height:1.6}.drop-zone{min-height:240px}.actions{grid-template-columns:1fr 1fr}.actions label{padding-left:16px}.actions select{border-right:0}.primary{grid-column:1/-1}.explanation{margin-top:86px}.explanation-grid{grid-template-columns:1fr}.explanation-grid p,.explanation-grid p:nth-child(2n){padding:22px 0;border-right:0!important}}@media(prefers-reduced-motion:reduce){*{transition-duration:.01ms!important}}html{scrollbar-width:none}html::-webkit-scrollbar{display:none}::selection{background:var(--accent);color:#fff}.selection-layer{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;pointer-events:none;overflow:hidden}.selection-fragment{position:absolute;left:0;top:0;width:1px;height:1px;background:var(--accent);mix-blend-mode:multiply;transform-origin:left top;transform:translate(var(--x),var(--y)) scale(var(--w),var(--h));animation:selection-in .28s cubic-bezier(.22,1,.36,1) both}.scroll-rail{position:fixed;right:22px;top:50%;z-index:15;width:18px;height:180px;transform:translateY(-50%);border-left:1px solid #b8b8b8;color:var(--muted);font-size:9px;font-style:normal;font-variant-numeric:tabular-nums}.scroll-rail i{position:absolute;left:-1px;top:0;width:2px;height:100%;background:var(--accent);transform-origin:top}.scroll-rail span,.scroll-rail b{position:absolute;left:7px;font-weight:500}.scroll-rail span{top:0}.scroll-rail b{bottom:0}footer{margin:0 var(--gutter);padding:28px 0 42px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px;letter-spacing:.05em}footer a{color:var(--ink)}.error{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:18px;padding:14px 16px;border:1px solid #caa;background:#f7eaea}.error button{flex:none;min-height:38px;padding:0 14px;background:transparent;border:1px solid currentColor}@keyframes selection-in{0%{opacity:0;transform:translate(var(--x),var(--y)) scale(0,var(--h))}to{opacity:1;transform:translate(var(--x),var(--y)) scale(var(--w),var(--h))}}@media(max-width:720px){.scroll-rail{display:none}footer{flex-direction:column;padding-bottom:32px}}@media(prefers-reduced-motion:reduce){.selection-fragment{animation:none}}