:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#7c5cff; /* 라벤더 바이올렛 */
  --accent-soft:rgba(124,92,255,.12);
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:100vh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em;margin:0}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--hover)}
.btn:disabled{opacity:.4;cursor:default;background:transparent}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.btn--sm{height:30px;padding:0 12px;font-size:12px}
.btn--wide{width:100%}
.text-input{height:38px;padding:0 10px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:13px;color:var(--ink);width:100%;min-width:0}
.text-input:focus,.select:focus{outline:none;border-color:var(--ink)}
.select{height:38px;padding:0 10px;border:1px solid var(--line-2);border-radius:8px;background:var(--surface);font:inherit;font-size:13px;color:var(--ink);width:100%}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.mg{width:100%;max-width:1320px;margin:0 auto;padding:28px 28px 56px;display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
.canvas-col{display:flex;flex-direction:column;gap:14px;min-width:0}

/* ---------- Preview ---------- */
.preview-shell{display:flex;align-items:center;justify-content:center;padding:28px;border-radius:24px;min-height:320px;
  background-color:#fff;background-image:radial-gradient(circle,#dcd8ec 1px,transparent 1.2px);background-size:16px 16px;border:1px solid var(--line)}
.preview{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 1px 2px rgba(0,0,0,.06),0 30px 60px -24px rgba(60,40,120,.35);touch-action:none}
.mesh{position:absolute;inset:0}
.handles{position:absolute;inset:0}
.handle{position:absolute;width:30px;height:30px;margin:-15px 0 0 -15px;border-radius:50%;border:3px solid #fff;padding:0;cursor:grab;
  box-shadow:0 0 0 1px rgba(0,0,0,.18),0 4px 14px rgba(0,0,0,.25);transition:transform .15s,box-shadow .15s;touch-action:none}
.handle:hover{transform:scale(1.1)}
.handle.is-sel{transform:scale(1.18);box-shadow:0 0 0 2px var(--ink),0 0 0 5px rgba(255,255,255,.8),0 6px 18px rgba(0,0,0,.3)}
.handle.is-drag{cursor:grabbing;transition:none}
.handle .ring{position:absolute;left:50%;top:50%;border:1px dashed rgba(255,255,255,.75);border-radius:50%;pointer-events:none;transform:translate(-50%,-50%);opacity:0;transition:opacity .2s}
.handle.is-sel .ring{opacity:1}
.preview.hide-handles .handles{opacity:0}
.hint{margin:0;font-size:12.5px;color:var(--sub);line-height:1.6}
.hint b{color:var(--ink-2);font-weight:500}

/* ---------- Code ---------- */
.code-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.code-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px 10px 16px;border-bottom:1px solid var(--line-3);background:var(--panel-soft)}
.code{margin:0;padding:14px 16px;max-height:300px;overflow:auto;font-family:var(--mono);font-size:12px;line-height:1.7;white-space:pre;color:var(--ink-2)}
.code .p{color:var(--accent)}.code .k{color:var(--ink);font-weight:500}.code .c{color:var(--muted)}
.code .sw{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15)}

/* ---------- Panel ---------- */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:4px 18px;position:sticky;top:16px}
.group{padding:16px 0;border-bottom:1px solid var(--line-3);display:flex;flex-direction:column;gap:10px}
.group:last-child{border-bottom:none}
.row-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.lbl{font-size:12.5px;font-weight:500;color:var(--ink-2)}
.lbl b{font-family:var(--mono);font-weight:500;color:var(--ink)}
.mini-actions{display:flex;gap:6px}
.dots{display:flex;flex-wrap:wrap;gap:8px}
.dot{width:34px;height:34px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px var(--line-2);cursor:pointer;padding:0;position:relative}
.dot.is-sel{box-shadow:0 0 0 2px var(--ink)}
.dot span{position:absolute;right:-4px;bottom:-4px;width:15px;height:15px;border-radius:50%;background:#fff;font-family:var(--mono);font-size:9px;line-height:15px;color:var(--ink);box-shadow:0 0 0 1px var(--line-2)}
.sel-edit{display:flex;align-items:center;gap:8px}
.color-field{flex:none;width:38px;height:38px;border-radius:10px;overflow:hidden;border:1px solid var(--line-2);cursor:pointer;position:relative}
.color-field input{position:absolute;inset:-8px;width:calc(100% + 16px);height:calc(100% + 16px);border:none;padding:0;cursor:pointer}
.hex{font-family:var(--mono);width:96px;flex:none;text-transform:lowercase}
.sl{display:flex;flex-direction:column;gap:4px;min-width:0}
.sl--grow{flex:1}
.sl label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-2)}
.sl output{font-family:var(--mono);font-size:11.5px;color:var(--ink)}
.sl-head{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2)}
/* 슬라이더 직접 입력칸: 단위 자리를 고정 폭으로 둬 입력칸 끝을 맞춤 */
.sl-head .tb-num{height:26px;width:48px;padding:0 6px;font-size:12px;color:var(--ink);border-color:var(--line-2);background:var(--surface)}
.sl-head .tb-num-wrap{width:66px;font-family:var(--mono);font-size:11px;color:var(--muted);gap:3px}
.sl-head > .tb-num{margin-right:18px}
@media (pointer:coarse){.sl-head .tb-num{height:32px;width:56px;font-size:16px}.sl-head .tb-num-wrap{width:74px}}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:20px;background:transparent;margin:0;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:4px;background:var(--track)}
input[type=range]::-moz-range-track{height:4px;border-radius:4px;background:var(--track)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;margin-top:-6px;border-radius:50%;background:#fff;border:2px solid var(--accent);box-shadow:0 1px 3px rgba(0,0,0,.2)}
input[type=range]::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:#fff;border:2px solid var(--accent)}
.palettes{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.pal{height:46px;border-radius:10px;border:1px solid var(--line-2);cursor:pointer;position:relative;overflow:hidden;padding:0}
.pal span{position:absolute;left:6px;bottom:4px;font-size:10.5px;font-weight:500;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.35)}
.pal:hover{transform:translateY(-1px)}
.wh{display:flex;align-items:center;gap:6px}
.wh label{display:flex;align-items:center;gap:6px;flex:1;min-width:0}
.wh label span{font-family:var(--mono);font-size:11px;color:var(--muted)}
.wh .x{color:var(--muted)}
.wh input{font-family:var(--mono)}
.note{margin:0;font-size:11.5px;color:var(--sub);line-height:1.55}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

@media (max-width:980px){
  .mg{grid-template-columns:1fr}
  .panel{position:static}
  .canvas-col{display:contents}
  .preview-shell{order:1}.hint{order:2}.panel{order:3}.code-card{order:4}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .mg{padding:16px 16px 40px;gap:14px}
  .preview-shell{padding:14px;border-radius:18px;min-height:0}
  .panel{padding:4px 16px}
  .handle{width:34px;height:34px;margin:-17px 0 0 -17px}
}
@media (prefers-reduced-motion:reduce){
  .handle,.handle .ring,.toast{transition:none}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 그라디언트 미리보기·팔레트 견본은 그대로 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141318; --surface:#1a1920; --panel:#1f1e26; --panel-soft:#24232c;
    --ink:#ecebf0; --ink-hover:#ffffff; --ink-2:#c9c7d1; --sub:#a09eab; --muted:#8a8895;
    --line:#2e2d36; --line-2:#393843; --line-3:#26252d; --hover:#2a2932; --soft:#26252d; --track:#34333d;
    --accent:#a48eff; --accent-soft:rgba(164,142,255,.16);
  }
  :root[data-theme="dark"] .btn--solid,
  :root[data-theme="dark"] .toast{color:var(--bg)}
  :root[data-theme="dark"] .preview-shell{background-color:var(--surface);background-image:radial-gradient(circle,#34323f 1px,transparent 1.2px)}
  :root[data-theme="dark"] .preview{box-shadow:0 0 0 1px rgba(255,255,255,.06),0 30px 60px -24px rgba(0,0,0,.7)}
  :root[data-theme="dark"] .dot{border-color:var(--panel)}
  :root[data-theme="dark"] .dot span{background:var(--panel-soft)}
  :root[data-theme="dark"] .code .sw{box-shadow:inset 0 0 0 1px rgba(255,255,255,.15)}
}