:root{
  --navy:#1f3a5f; --navy-d:#142a44; --ink:#2b3440; --gray:#6b7480;
  --line:#cdd6dd; --bg:#f6f7f5; --card:#ffffff; --sage:#7ba7a0; --terra:#c46f4f;
  --shadow:0 1px 2px rgba(20,42,68,.06), 0 8px 24px rgba(20,42,68,.07);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;overflow-x:hidden;overscroll-behavior-x:none}
body{
  background:var(--bg); color:var(--ink);
  font:15px/1.65 "Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2{margin:0;font-weight:700;letter-spacing:.01em}
button,input,select,textarea{font:inherit;color:inherit}

/* ── header ── */
.hd{background:var(--navy);color:#fff;padding-top:env(safe-area-inset-top,0px)}
.hd-in{max-width:1360px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.hd-title{display:flex;align-items:center;gap:14px;min-width:0}
.mark{height:44px;width:auto;display:block;flex:none}   /* 公式ReG>マーク（白・keychev）。ネイビー地に直置き */
.hd h1{font-size:19px}
.hd p{margin:2px 0 0;font-size:13px;color:#cdd6dd}


.badge{font-size:11px;letter-spacing:.08em;border:1px solid rgba(255,255,255,.45);border-radius:999px;padding:4px 11px;white-space:nowrap}
@media(max-width:640px){
  .badge{display:none}          /* 狭い画面ではタイトルを潰さない */
  .hd-in{padding:14px 16px}
  .hd h1{font-size:clamp(14px,4.2vw,16px)}
  .hd-title{gap:10px}
  .mark{height:clamp(24px,7.6vw,30px)}   /* ロゴを保ちつつタイトルを1行に収める */
  .hd p{font-size:12px}
  .wrap{padding:16px;gap:16px}
  .ft{padding:0 16px}
}

/* ── 合言葉の画面 ── */
.gate{position:fixed;inset:0;z-index:50;background:var(--navy);display:flex;align-items:center;
  justify-content:center;padding:24px calc(24px + env(safe-area-inset-right,0px))
  calc(24px + env(safe-area-inset-bottom,0px)) calc(24px + env(safe-area-inset-left,0px))}
.gate-card{width:100%;max-width:320px;text-align:center;color:#fff}
.gate-card img{height:40px;width:auto;display:block;margin:0 auto 22px}
.gate-card h2{font-size:15px;letter-spacing:.02em}
.gate-card p{margin:6px 0 20px;font-size:12.5px;color:#cdd6dd;line-height:1.6}
.gate-card input{width:100%;border:1px solid rgba(255,255,255,.35);border-radius:8px;padding:12px;
  background:rgba(255,255,255,.08);color:#fff;text-align:center;letter-spacing:.08em}
.gate-card input::placeholder{color:rgba(255,255,255,.5);letter-spacing:0}
.gate-card input:focus{outline:2px solid #fff;outline-offset:-1px}
.gate-card button{width:100%;margin-top:10px;background:#fff;color:var(--navy);border:0;border-radius:8px;
  padding:12px;font-weight:700;cursor:pointer}
.gate-card button:disabled{opacity:.55;cursor:not-allowed}
.gate-msg{margin:12px 0 0;min-height:1.2em;font-size:12.5px;color:#ffb4ab}

.warn{max-width:1360px;margin:16px auto -8px;padding:10px 16px;background:#fdecea;border:1px solid #b3261e;color:#b3261e;border-radius:8px;font-size:12.5px}

/* ── layout ── */
.wrap{max-width:1360px;margin:0 auto;padding:24px;display:grid;grid-template-columns:376px minmax(0,1fr);gap:24px;align-items:start}
@media(max-width:1040px){
  .wrap{grid-template-columns:1fr}
  .stage{order:-1}   /* スマホでは画像を先頭に。操作パネルの下に埋もれさせない */
}
.panel{display:flex;flex-direction:column;gap:16px}
.stage{display:flex;flex-direction:column;gap:16px;min-width:0}
.blk{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:var(--shadow)}
.blk h2{font-size:13px;color:var(--navy);letter-spacing:.06em;margin-bottom:12px;display:flex;align-items:baseline;gap:10px}
.blk h2 small{font-weight:400;color:var(--gray);letter-spacing:0;font-size:12px}

/* ── samples ── */
.samples{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.samples button{padding:0;border:2px solid transparent;background:none;border-radius:8px;overflow:hidden;cursor:pointer;line-height:0;position:relative;outline-offset:2px}
.samples img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;border-radius:6px}
.samples button.on{border-color:var(--navy)}
.samples span{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(20,42,68,.9));color:#fff;font-size:10.5px;line-height:1.3;padding:14px 4px 4px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.upload{display:block;margin-top:10px;border:1px dashed var(--line);border-radius:8px;padding:9px;text-align:center;font-size:12.5px;color:var(--gray);cursor:pointer}
.upload:hover{border-color:var(--navy);color:var(--navy)}

/* ── prompt ── */
textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:10px;resize:vertical;background:#fff}
textarea:focus,input:focus,select:focus{outline:2px solid var(--navy);outline-offset:-1px;border-color:var(--navy)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 12px}
.chips button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:4px 11px;font-size:12px;color:var(--navy);cursor:pointer}
.chips button:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.run{width:100%;background:var(--navy);color:#fff;border:0;border-radius:8px;padding:12px;font-weight:700;cursor:pointer}
.run:hover{background:var(--navy-d)}
.run:disabled{background:var(--gray);cursor:not-allowed}
.ghost{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 13px;font-size:13px;color:var(--navy);cursor:pointer}
.ghost:hover:not(:disabled){border-color:var(--navy);background:#eef2f6}
.ghost:disabled{color:var(--gray);cursor:not-allowed;opacity:.6}
#reset{width:100%;margin-top:12px}
.status{margin:10px 0 0;font-size:12.5px;min-height:1.2em;color:var(--gray)}
.status.err,.err{color:#b3261e}

/* ── modes / stack ── */
.modes{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.mode{display:flex;gap:9px;border:1px solid var(--line);border-radius:9px;padding:10px;cursor:pointer;align-items:flex-start}
.mode:has(input:checked){border-color:var(--navy);background:#eef2f6}
.mode input{margin-top:3px;accent-color:var(--navy)}
.mode b{font-size:13px;display:block}
.mode small{display:block;color:var(--gray);font-size:11.5px;line-height:1.55;margin-top:2px}
.rec{background:var(--sage);color:#fff;font-size:10px;border-radius:4px;padding:1px 5px;margin-left:6px;vertical-align:1px}
.lbl{font-size:12px;color:var(--gray);margin:0 0 6px}
.stack{margin:0;padding-left:20px;font-size:12.5px;display:flex;flex-direction:column;gap:5px}
.stack li{padding-right:22px;position:relative}
.stack li.empty{list-style:none;margin-left:-20px;color:var(--gray)}
.stack button{position:absolute;right:0;top:0;border:0;background:none;color:var(--gray);cursor:pointer;font-size:14px;line-height:1;padding:2px 4px}
.stack button:hover{color:#b3261e}

/* ── advanced ── */
.adv summary{font-size:13px;color:var(--navy);cursor:pointer;font-weight:700;letter-spacing:.06em}
.adv label{display:block;font-size:12px;color:var(--gray);margin-top:12px}
.adv select{display:block;width:100%;margin-top:4px;border:1px solid var(--line);border-radius:8px;padding:8px;background:#fff}
.adv label.check{display:flex;gap:8px;align-items:flex-start;color:var(--navy);font-size:12.5px}
.adv label.check input{margin-top:2px;accent-color:var(--navy);flex:0 0 auto}
.adv label.check small{display:block;color:var(--gray);font-size:11.5px;line-height:1.55;margin-top:3px;font-weight:400}

/* ── viewer ── */
.viewer{position:relative;background:var(--navy-d);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);min-height:280px;display:flex;align-items:center;justify-content:center}
.compare{position:relative;line-height:0;max-width:100%;user-select:none}
.compare img{display:block;max-width:100%;max-height:min(66vh,720px);width:auto}
.clip{position:absolute;inset:0;overflow:hidden;width:50%}
.clip img{max-width:none;max-height:min(66vh,720px);height:100%}
.handle{position:absolute;top:0;bottom:0;left:50%;width:44px;margin-left:-22px;cursor:ew-resize;
  touch-action:none;-webkit-tap-highlight-color:transparent}
.handle::before{content:"";position:absolute;top:0;bottom:0;left:50%;width:2px;margin-left:-1px;
  background:#fff;box-shadow:0 0 0 1px rgba(20,42,68,.35)}
.handle.on span{transform:translate(-50%,-50%) scale(1.12)}
.handle span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:32px;height:32px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.35)}
.handle span::before{content:"‹ ›";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--navy);font:700 15px/1 system-ui;letter-spacing:1px}
.compare.solo .clip,.compare.solo .handle,.compare.solo .tag{display:none}
.tag{position:absolute;top:10px;font-size:11px;background:rgba(20,42,68,.72);color:#fff;border-radius:4px;padding:2px 8px;line-height:1.6}
.tag-l{left:10px} .tag-r{right:10px}
.spinner{position:absolute;inset:0;background:rgba(20,42,68,.78);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:#fff;font-size:13px}
.spinner div{width:34px;height:34px;border:3px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:sp .9s linear infinite}
.spinner p{margin:0}
@keyframes sp{to{transform:rotate(360deg)}}

/* ── meta ── */
.meta{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.metrics{display:flex;gap:8px;flex-wrap:wrap;font-size:12px}
.metrics b{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;padding:3px 11px;font-weight:400}
.metrics b i{font-style:normal;color:var(--gray);margin-right:6px}
.metrics .cost{border-color:var(--terra);color:var(--terra)}
.muted{color:var(--gray)}
.acts{display:flex;gap:8px;flex-wrap:wrap}

/* ── history ── */
.history{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
.history button{padding:0;border:2px solid transparent;background:none;border-radius:8px;cursor:pointer;line-height:0;flex:0 0 auto;position:relative}
.history img{width:112px;height:76px;object-fit:cover;border-radius:6px;display:block}
.history button.on{border-color:var(--navy)}
.history i{position:absolute;left:3px;top:3px;background:rgba(20,42,68,.8);color:#fff;font-style:normal;font-size:10px;border-radius:4px;padding:1px 5px}
.history .empty{color:var(--gray);font-size:12.5px;margin:0}
.hist h2{margin-bottom:10px}

.dump{background:var(--navy-d);color:#cdd6dd;border-radius:12px;padding:16px;font-size:11.5px;line-height:1.6;overflow:auto;max-height:340px;margin:0;white-space:pre-wrap;word-break:break-all}

/* ── footer ── */
.ft{max-width:1360px;margin:8px auto 40px;padding:0 24px;color:var(--gray);font-size:12px;
  /* ホーム画面から起動すると全画面になる。ホームインジケータに潜らせない */
  padding-bottom:env(safe-area-inset-bottom,0px)}
.ft p{margin:4px 0}
code{font-family:ui-monospace,SFMono-Regular,monospace;font-size:11.5px;background:#eef1f4;padding:1px 5px;border-radius:4px}