:root{
  --navy:#0F2540; --blue:#2160C8; --ink:#1F2937; --mut:#6B7280;
  --bg:#F4F6FA; --card:#fff; --line:#E5E7EB; --ok:#16A34A;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;
  -webkit-text-size-adjust:100%;overscroll-behavior:none;}
body{max-width:560px;margin:0 auto;min-height:100vh;}
.view{display:none;padding:0 16px env(safe-area-inset-bottom);}
.view.on{display:block;}

/* ホーム */
.home{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:18px;padding:calc(24px + env(safe-area-inset-top)) 24px 24px;}
.home__logo{font-size:34px;font-weight:900;letter-spacing:.14em;color:var(--navy);}
.home__lead{font-size:19px;line-height:1.8;color:var(--ink);margin:0;}
.home__lead strong{color:var(--blue);}
.home__note{font-size:12px;color:var(--mut);margin:2px 0 0;}

/* バー */
.bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:6px;
  padding:calc(10px + env(safe-area-inset-top)) 4px 10px;background:var(--bg);}
.bar__back{border:0;background:none;color:var(--blue);font-size:15px;font-weight:700;padding:6px 6px;white-space:nowrap;}
.bar__t{flex:1;text-align:center;font-size:16px;font-weight:800;color:var(--navy);white-space:nowrap;}
.bar__act{border:0;background:none;color:var(--blue);font-size:13px;font-weight:800;padding:6px 6px;white-space:nowrap;}

/* ステージ（拡大時はスクロールで見たい場所へ） */
.stagewrap{overflow:auto;-webkit-overflow-scrolling:touch;border-radius:12px;}
.stagewrap::-webkit-scrollbar{width:0;height:0;}
.stage{position:relative;margin:0 auto;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(15,37,64,.12);background:#000;touch-action:none;}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;display:block;}
.mask{opacity:.5;mix-blend-mode:normal;}
.brushpv{position:absolute;left:0;top:0;width:0;height:0;border:2px solid rgba(33,96,200,.95);border-radius:50%;pointer-events:none;opacity:0;transform:translate(-50%,-50%);transition:opacity .25s;z-index:3;}
.panhint{display:none;font-size:12px;font-weight:700;color:var(--blue);text-align:center;margin:6px 2px 0;}
.home__sample{margin-top:2px;border:0;background:none;color:var(--blue);font-size:14px;font-weight:700;text-decoration:underline;padding:8px;}

/* ツール */
.tools{padding:14px 0 28px;}
.tools__row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;}
.tools__row--2{gap:12px;}
.tools__row--2 .btn{flex:1;}
.seg{display:inline-flex;border:1.5px solid var(--blue);border-radius:999px;overflow:hidden;}
.seg button{border:0;background:#fff;color:var(--blue);font-weight:800;font-size:14px;padding:9px 16px;}
.seg button.on{background:var(--blue);color:#fff;}
.seg--4{display:grid;grid-template-columns:repeat(4,1fr);width:100%;margin-bottom:12px;}
.seg--4 button{border-left:1.5px solid var(--blue);font-size:13px;padding:11px 4px;}
.seg--4 button:first-child{border-left:0;}
.tools__row .brush{margin-left:0;width:100%;justify-content:flex-start;gap:10px;}
.tools__row .brush input{flex:1;}
.mini{border:1.5px solid var(--line);background:#fff;color:var(--mut);border-radius:999px;font-weight:700;font-size:13px;padding:8px 12px;}
.brush{margin-left:auto;font-size:12px;color:var(--mut);display:flex;align-items:center;gap:6px;}
.brush input{width:110px;height:26px;accent-color:var(--blue);}
.zoom{margin-left:auto;display:flex;align-items:center;gap:4px;font-size:12px;color:var(--mut);}
.zoom button{border:1.5px solid var(--line);background:#fff;color:var(--mut);border-radius:8px;font-weight:800;font-size:13px;padding:7px 10px;}
.zoom button.on{border-color:var(--blue);color:var(--blue);background:#EAF1FC;}

.seclabel{font-size:15px;font-weight:800;color:var(--navy);margin:6px 0 10px;}
.colors{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch;}
.chip{flex:0 0 auto;display:flex;align-items:center;gap:8px;border:1.5px solid var(--line);background:#fff;
  border-radius:12px;padding:8px 12px 8px 8px;}
.chip.on{border-color:var(--blue);box-shadow:0 0 0 2px rgba(33,96,200,.15);}
.chip__sw{width:30px;height:30px;border-radius:8px;border:1px solid rgba(0,0,0,.1);flex:0 0 auto;}
.chip__t{font-size:14px;font-weight:800;color:var(--ink);line-height:1.15;text-align:left;white-space:nowrap;}
.chip__t small{display:block;font-size:10px;font-weight:600;color:var(--mut);}

/* ボタン */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1.5px solid var(--line);
  background:#fff;color:var(--ink);font-weight:800;font-size:16px;border-radius:12px;padding:14px 18px;width:100%;cursor:pointer;}
.btn--primary{background:var(--blue);border-color:var(--blue);color:#fff;}
.btn--primary:disabled{background:#9DB6E0;border-color:#9DB6E0;}
.btn--big{font-size:18px;padding:18px 22px;background:var(--navy);border-color:var(--navy);color:#fff;width:auto;box-shadow:0 6px 18px rgba(15,37,64,.25);}
.btn:active{transform:scale(.99);}
#applyBtn{margin-top:14px;position:sticky;bottom:calc(10px + env(safe-area-inset-bottom));box-shadow:0 6px 20px rgba(33,96,200,.28);z-index:4;}
.tip{font-size:12px;color:var(--mut);margin:10px 2px 0;line-height:1.6;}

/* before/after */
.ba{position:relative;margin:0 auto;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(15,37,64,.12);background:#000;touch-action:none;}
.ba__img{position:absolute;inset:0;width:100%;height:100%;display:block;}
.ba__after{clip-path:inset(0 0 0 50%);}
.ba__lblB,.ba__lblA{position:absolute;top:8px;color:#fff;font-size:12px;font-weight:800;background:rgba(15,37,64,.8);padding:3px 9px;border-radius:999px;}
.ba__lblB{left:8px;} .ba__lblA{right:8px;background:var(--blue);}
.ba__handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;transform:translateX(-1px);pointer-events:none;}
.ba__handle span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:42px;height:42px;border-radius:50%;background:#fff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;box-shadow:0 2px 10px rgba(0,0,0,.35);}
.cmphint{text-align:center;font-size:12px;color:var(--mut);margin:8px 0 0;}
.ba__range{position:absolute;inset:0;width:100%;height:100%;opacity:0;margin:0;cursor:ew-resize;touch-action:none;}
.rcap{text-align:center;font-size:14px;font-weight:700;color:var(--navy);margin:12px 0 2px;}

/* toast */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:#fff;font-size:14px;font-weight:700;padding:10px 18px;border-radius:999px;
  opacity:0;pointer-events:none;transition:.25s;z-index:50;max-width:90%;text-align:center;}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0);}