:root {
  --bg:#fff;
  --text:#171717;
  --muted:#737373;
  --line:#e8e8e8;
  --soft:#f7f7f6;
  --black:#181818;
}
*{box-sizing:border-box}
html{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Noto Sans KR","Noto Sans SC",sans-serif;-webkit-font-smoothing:antialiased}
body{margin:0;min-height:100vh;min-height:100dvh;background:var(--bg)}
button,input,select{font:inherit}
button,select,.dropzone{touch-action:manipulation}
.shell{width:min(100%,560px);min-height:100vh;min-height:100dvh;margin:0 auto;padding:max(22px,env(safe-area-inset-top)) 20px max(24px,env(safe-area-inset-bottom));display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between}
.brand{color:var(--text);text-decoration:none;font-size:18px;font-weight:720;letter-spacing:-.035em}
.language-wrap{position:relative;display:flex;align-items:center;gap:4px;border:1px solid var(--line);border-radius:999px;padding:0 11px;height:36px;background:#fff;color:#555}
.language-wrap select{appearance:none;border:0;outline:0;background:transparent;padding:0 16px 0 0;font-size:12px;color:inherit}
.language-wrap span{position:absolute;right:10px;top:8px;font-size:13px;pointer-events:none;color:#999}
.hero{padding:76px 2px 30px}
.hero h1{margin:0;font-size:clamp(34px,9.2vw,50px);line-height:1.06;letter-spacing:-.06em;font-weight:740}
.hero p{margin:20px 0 0;max-width:460px;font-size:14px;line-height:1.8;color:var(--muted)}
.stage{margin-top:8px}
.dropzone{min-height:218px;border:1px solid var(--line);border-radius:22px;background:var(--soft);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;cursor:pointer;transition:border-color .15s ease,background .15s ease,transform .15s ease}
.dropzone:hover,.dropzone.is-drag{border-color:#cfcfcf;background:#f4f4f3}
.dropzone:active{transform:scale(.995)}
.dropzone input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.drop-icon{width:42px;height:42px;border-radius:50%;background:#fff;border:1px solid var(--line);display:grid;place-items:center;margin-bottom:5px}
.drop-icon svg{width:19px;height:19px;fill:none;stroke:#494949;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.dropzone strong{font-size:14px;font-weight:650}
.dropzone small{font-size:11px;color:#929292;letter-spacing:.02em}
.status{margin:12px 2px 0;color:#8a3838;font-size:12px}
.working{min-height:218px;margin-top:8px;border:1px solid var(--line);border-radius:22px;background:var(--soft);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.working p{margin:0;font-size:13px;color:var(--muted)}
.working-preview{display:block;width:100%;max-height:min(55vh,400px);object-fit:contain;border-radius:21px}
.spinner{width:22px;height:22px;border:1.5px solid #ddd;border-top-color:#444;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.result{margin-top:8px}
.compare{position:relative;width:100%;overflow:hidden;border-radius:22px;border:1px solid var(--line);background:#f4f4f4;aspect-ratio:1/1}
.compare>img,.before-layer img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#f4f4f4;user-select:none;-webkit-user-drag:none}
.before-layer{position:absolute;inset:0;width:100%;overflow:visible;z-index:2;pointer-events:none}
.before-layer img{width:100%;clip-path:inset(0 50% 0 0);will-change:clip-path}
.divider{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.92);border:1px solid rgba(0,0,0,.09);box-shadow:0 3px 14px rgba(0,0,0,.08);z-index:4;pointer-events:none}
.divider::before,.divider::after{content:"";position:absolute;top:12px;width:7px;height:7px;border-top:1.5px solid #555;border-left:1.5px solid #555}
.divider::before{left:9px;transform:rotate(-45deg)}
.divider::after{right:9px;transform:rotate(135deg)}
.split{position:absolute;inset:0;width:100%;height:100%;opacity:0;z-index:5;cursor:ew-resize}
.compare:has(.split[value]){}
.compare-label{position:absolute;top:13px;z-index:3;padding:5px 8px;border-radius:999px;background:rgba(255,255,255,.82);backdrop-filter:blur(8px);font-size:9px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.before-label{left:13px}
.after-label{right:13px}
.primary{width:100%;height:58px;margin-top:13px;border:0;border-radius:16px;background:var(--black);color:#fff;font-size:14px;font-weight:700;cursor:pointer}
.primary:active{transform:scale(.995)}
.result-meta{display:flex;align-items:center;justify-content:space-between;min-height:42px;padding:0 3px}
.result-meta span{font-size:10px;color:#999}
.again{width:32px;height:32px;border:0;background:transparent;color:#777;font-size:21px;line-height:1;cursor:pointer}
footer{margin-top:auto;padding-top:42px}
.author-card{display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:inherit;opacity:.66;transition:opacity .15s ease}
.author-card:hover{opacity:1}
.author-avatar{width:38px;height:38px;border-radius:11px;border:1px solid var(--line);overflow:hidden;background:#f4f4f4}
.author-avatar img{width:100%;height:100%;object-fit:cover;display:block}
.author-copy{display:grid;grid-template-columns:auto auto;column-gap:7px;align-items:end}
.author-copy small{grid-column:1/-1;color:#aaa;font:600 7px/1.25 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.13em}
.author-copy b{font-size:10px;letter-spacing:.01em}
.author-copy em{font:9px/1.2 ui-monospace,SFMono-Regular,Menlo,monospace;color:#929292;font-style:normal}
[hidden]{display:none!important}
@media(max-width:420px){.hero{padding-top:64px}.author-copy em{display:none}}
@media(min-width:680px){.shell{padding-left:24px;padding-right:24px}.hero{padding-top:92px}.compare{aspect-ratio:4/5}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}