:root{
  --bg:#efe9dc; --surface:#faf7f0; --ink:#1c1a17; --sub:#5a5348; --line:#d6cdbb; --shu:#a8262c; --shu-ink:#fdf6f2; --ai:#2f5d8a; --dim:rgba(239,233,220,.78);
  --brush:"Yuji Syuku","Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;
  --text:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){ --bg:#161412; --surface:#211e1a; --ink:#ece5d8; --sub:#b3aa9b; --line:#3a352e; --shu:#d0463f; --shu-ink:#fff6f2; --ai:#6f9fd0; --dim:rgba(22,20,18,.74); color-scheme:dark; }
}
:root[data-theme="dark"]{ --bg:#161412; --surface:#211e1a; --ink:#ece5d8; --sub:#b3aa9b; --line:#3a352e; --shu:#d0463f; --shu-ink:#fff6f2; --ai:#6f9fd0; --dim:rgba(22,20,18,.74); color-scheme:dark; }
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--text);font-size:16px;line-height:1.75;-webkit-text-size-adjust:100%}
.vh{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;pointer-events:none}
.wrap{max-width:560px;margin:0 auto;padding:14px 16px 40px}
header.top{display:flex;align-items:center;gap:12px;padding:4px 0 12px;border-bottom:2px solid var(--ink)}
.seal{width:44px;height:44px;flex:none;border-radius:6px;background:var(--shu);color:var(--shu-ink);font-family:var(--brush);font-size:26px;display:flex;align-items:center;justify-content:center;transform:rotate(-4deg)}
header h1{margin:0;font-family:var(--brush);font-weight:400;font-size:30px;line-height:1.1}
header p{margin:2px 0 0;color:var(--sub);font-size:13px}
ol.steps{list-style:none;display:flex;gap:6px;margin:12px 0 2px;padding:0}
ol.steps li{flex:1;font-size:12px;color:var(--sub);border-top:4px solid var(--line);padding-top:5px}
ol.steps li[aria-current="step"]{color:var(--ink);font-weight:700;border-color:var(--shu)}
ol.steps li.done{border-color:var(--ink)}
section{padding-top:14px}
h2{font-family:var(--brush);font-weight:400;font-size:27px;line-height:1.3;margin:0 0 6px}
.hint{color:var(--sub);font-size:14px;margin:0 0 12px}

/* camera */
.camera{position:relative;width:100%;aspect-ratio:3/4;max-height:68vh;background:#0e0d0c;border-radius:12px;overflow:hidden}
.camera video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#0e0d0c}
.guide{position:absolute;border-radius:6px;box-shadow:0 0 0 2000px rgba(10,9,8,.45)}
.guide svg{position:absolute;inset:6% 4%;width:92%;height:88%}
.guide .c{position:absolute;width:26px;height:26px;border:4px solid #e04b42}
.guide .tl{left:-2px;top:-2px;border-right:none;border-bottom:none;border-top-left-radius:6px}
.guide .tr{right:-2px;top:-2px;border-left:none;border-bottom:none;border-top-right-radius:6px}
.guide .bl{left:-2px;bottom:-2px;border-right:none;border-top:none;border-bottom-left-radius:6px}
.guide .br{right:-2px;bottom:-2px;border-left:none;border-top:none;border-bottom-right-radius:6px}
.camtip{position:absolute;left:0;right:0;margin:0;text-align:center;color:#fff;font-size:14px;font-weight:700;text-shadow:0 1px 3px rgba(0,0,0,.6);padding:0 12px}
.camtip.top-tip{top:16%}
.camtip.bottom-tip{bottom:16%;font-weight:400;font-size:13px}
.camstate{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px;background:rgba(14,13,12,.82);color:#f2ede3;text-align:center}
.camstate p{margin:0;font-size:14px;line-height:1.7}
.shutterbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;margin-top:14px}
.shutterbar .side{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:12px;color:var(--sub);cursor:pointer;border:none;background:none;padding:6px;border-radius:10px;font-weight:400}
.shutterbar .side .ico{font-size:22px;line-height:1;color:var(--ink)}
.shutterbar .side:focus-within,.shutterbar .side:focus-visible{outline:3px solid var(--shu);outline-offset:2px}
.shutterbar .spacer{cursor:default}
.shutter{width:76px;height:76px;border-radius:50%;border:4px solid var(--shu);background:transparent;padding:5px;display:flex;align-items:center;justify-content:center}
.shutter span{display:block;width:100%;height:100%;border-radius:50%;background:var(--shu)}
.shutter:active span{transform:scale(.92)}

/* shared */
button{font:inherit;cursor:pointer;border-radius:999px;border:1.5px solid var(--ink);background:transparent;color:var(--ink);padding:11px 20px;font-weight:700;font-size:15px;line-height:1.3}
button:focus-visible,input:focus-visible{outline:3px solid var(--shu);outline-offset:2px}
button.primary{background:var(--shu);border-color:var(--shu);color:var(--shu-ink)}
button[disabled]{opacity:.45;cursor:not-allowed}
button.link{border:none;padding:10px 4px;text-decoration:underline;text-underline-offset:4px;font-weight:400;color:var(--sub)}
.actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;align-items:center}
.actions .primary{flex:1;min-width:160px}
.stage{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.stage canvas{display:block;width:100%;height:auto;touch-action:none;cursor:crosshair}
.tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:12px;font-size:14px}
.tools .lbl{color:var(--sub)}
.chip{padding:7px 16px;font-size:14px;border-color:var(--line)}
.chip[aria-pressed="true"].keep{background:var(--shu);border-color:var(--shu);color:var(--shu-ink)}
.chip[aria-pressed="true"].erase{background:var(--ai);border-color:var(--ai);color:#fff}
.status{font-size:13px;color:var(--sub);margin:10px 0 0;min-height:1.5em}
.status.err{color:var(--shu);font-weight:700}
.spinner{display:inline-block;width:12px;height:12px;border:2px solid var(--line);border-top-color:var(--shu);border-radius:50%;animation:spin .8s linear infinite;vertical-align:-1px;margin-right:6px}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion: reduce){.spinner{animation:none}}
.field{display:flex;flex-direction:column;gap:4px;margin-bottom:14px}
.field label{font-size:13px;font-weight:700;color:var(--sub)}
.field input{font:inherit;font-size:16px;padding:10px 12px;border:1.5px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);width:100%}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.inks{display:flex;gap:8px}
.inks button{flex:1;padding:9px 0;border-color:var(--line)}
.inks button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.compare{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:6px 16px;margin:4px 0 14px}
.compare h3{font-family:var(--brush);font-weight:400;font-size:20px;margin:6px 0 2px}
.cmp{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding:8px 0;border-top:1px solid var(--line);font-size:14px}
.cmp:first-of-type{border-top:none}
.cmp b{font-family:var(--brush);font-weight:400;font-size:24px;color:var(--shu);white-space:nowrap}
.result{width:100%;height:auto;display:block;border-radius:6px;box-shadow:0 2px 14px rgba(0,0,0,.18);-webkit-touch-callout:default}
.note{font-size:13px;color:var(--sub);margin:10px 0 0}
.ec{margin-top:22px;padding:16px;border:1px solid var(--line);border-radius:10px;background:var(--surface);text-align:center}
.ec p{margin:0 0 10px;font-size:14px;color:var(--sub)}
.ec button{width:100%}
footer{margin-top:32px;font-size:12px;color:var(--sub);border-top:1px solid var(--line);padding-top:12px}