:root{
  --bg:#f5f3ff;
  --panel:#ffffff;
  --ink:#241b3a;
  --muted:#8a83a3;
  --line:#e7e2f5;
  --brand:#7c3aed;
  --brand2:#a855f7;
  --radius:16px;
  --shadow:0 8px 30px rgba(80,40,160,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:radial-gradient(1200px 600px at 80% -10%,#ede4ff 0%,var(--bg) 55%);
  color:var(--ink);
  min-height:100vh;
  padding:18px;
}
.topbar{
  max-width:1080px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{font-size:34px;filter:drop-shadow(0 4px 8px rgba(124,58,237,.3))}
.brand h1{font-size:22px;letter-spacing:.5px}
.brand .tag{font-size:13px;color:var(--muted)}
.gh{
  text-decoration:none;color:var(--brand);font-size:14px;font-weight:600;
  border:1px solid var(--line);padding:8px 14px;border-radius:999px;background:#fff;
  transition:.15s;
}
.gh:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

.layout{
  max-width:1080px;margin:0 auto;
  display:grid;grid-template-columns:340px 1fr;gap:18px;align-items:start;
}
.panel{
  background:var(--panel);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;
}
.controls{display:flex;flex-direction:column;gap:16px}

.dropzone{
  border:2px dashed var(--line);border-radius:14px;
  padding:26px 14px;text-align:center;cursor:pointer;
  transition:.15s;background:#faf8ff;
}
.dropzone:hover,.dropzone.drag{border-color:var(--brand);background:#f3ecff}
.dz-icon{font-size:38px}
.dz-title{font-weight:700;margin-top:6px}
.dz-sub{font-size:12px;color:var(--muted);margin-top:3px}

.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;font-weight:600;color:#4b4366;display:flex;justify-content:space-between}
.field .val{color:var(--brand);font-variant-numeric:tabular-nums}
.field.row{margin-top:-4px}
.chk{font-weight:500 !important;font-size:13px !important;display:flex;align-items:center;gap:8px;cursor:pointer}
.chk input{width:16px;height:16px;accent-color:var(--brand)}

input[type=range]{width:100%;accent-color:var(--brand)}
select{
  padding:10px 12px;border:1px solid var(--line);border-radius:10px;
  font-size:14px;background:#fff;color:var(--ink);cursor:pointer;
}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{
  flex:1;border:0;background:#fff;padding:10px;font-size:13px;cursor:pointer;color:#4b4366;
}
.seg button.active{background:var(--brand);color:#fff;font-weight:600}

.actions{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.btn{
  border:0;border-radius:12px;padding:13px;font-size:15px;font-weight:700;cursor:pointer;
  background:#efe9ff;color:var(--brand);transition:.15s;
}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 6px 18px rgba(124,58,237,.35)}
.btn.primary:disabled,.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.btn.ghost{background:#fff;border:1px solid var(--line);color:#4b4366;font-weight:600}

.preview{display:flex;flex-direction:column;gap:16px}
.canvas-wrap{
  position:relative;background:
    linear-gradient(45deg,#efeafc 25%,transparent 25%),
    linear-gradient(-45deg,#efeafc 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,#efeafc 75%),
    linear-gradient(-45deg,transparent 75%,#efeafc 75%);
  background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0;
  background-color:#fff;border-radius:14px;min-height:340px;
  display:flex;align-items:center;justify-content:center;overflow:auto;padding:14px;
}
#out{max-width:100%;height:auto;border-radius:6px;box-shadow:0 4px 20px rgba(0,0,0,.12)}
.stage{display:flex;flex-direction:column;align-items:center;gap:10px}
/* 对比滑块 */
.cmp{position:relative;display:inline-block;line-height:0;touch-action:none}
.cmp canvas{max-width:100%;height:auto;border-radius:6px;box-shadow:0 4px 20px rgba(0,0,0,.12)}
.cmp-over{position:absolute;top:0;left:0;clip-path:inset(0 0 0 50%);pointer-events:none}
.canvas-wrap:not(.comparing) .cmp-over{display:none}
.canvas-wrap:not(.comparing) .cmp-handle,
.canvas-wrap:not(.comparing) .cmp-tag{display:none}
.cmp-handle{position:absolute;top:0;bottom:0;left:50%;width:3px;background:#fff;transform:translateX(-50%);box-shadow:0 0 6px rgba(0,0,0,.45);z-index:3;pointer-events:none}
.cmp-grip{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--brand)}
.cmp-tag{position:absolute;top:8px;background:rgba(36,27,58,.8);color:#fff;font-size:12px;padding:3px 9px;border-radius:999px;z-index:3;pointer-events:none}
.cmp-tag-left{left:8px}
.cmp-tag-right{right:8px}
#letterText{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px;background:#fff;color:var(--ink)}
#letterText:focus{outline:none;border-color:var(--brand)}
.empty-hint{
  position:absolute;color:var(--muted);font-size:14px;text-align:center;padding:0 30px;
  pointer-events:none;
}

.list-block{background:#faf8ff;border-radius:14px;padding:14px}
.list-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.list-head h3{font-size:15px}
.muted{color:var(--muted);font-size:12px}
.small{font-size:12px}
.bead-list{display:flex;flex-wrap:wrap;gap:8px;max-height:220px;overflow:auto;margin-bottom:10px}
.bead-chip{display:flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 10px 4px 4px;font-size:12px}
.bead-swatch{width:18px;height:18px;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.bead-count{font-weight:700;color:var(--ink)}

.foot{max-width:1080px;margin:18px auto 0;text-align:center;color:var(--muted);font-size:12px}

.gallery-hint{font-size:12px;color:var(--muted);margin:2px 0 8px;text-align:center}
.gallery{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:4px}
.thumb-box{display:flex;flex-direction:column;align-items:center;gap:3px;cursor:pointer}
.thumb{width:54px;height:54px;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:0 2px 8px rgba(0,0,0,.06);transition:.15s}
.thumb-box:hover .thumb{transform:translateY(-2px);border-color:var(--brand);box-shadow:0 6px 16px rgba(124,58,237,.25)}
.thumb-cap{font-size:11px;color:#6b6385}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:#241b3a;color:#fff;padding:11px 18px;border-radius:999px;font-size:14px;box-shadow:0 8px 24px rgba(0,0,0,.25);opacity:0;pointer-events:none;transition:.25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:820px){
  .layout{grid-template-columns:1fr}
}