: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:#ff2a6d; /* 글리치 마젠타 */
  --accent-2:#05d9e8;
  --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--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:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:14px;color:var(--ink);width:100%}
.text-input:focus,.select:focus{outline:none;border-color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- Layout ---------- */
.gl{width:100%;max-width:1280px;margin:0 auto;padding:28px 28px 56px;display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:24px;align-items:start}
.stage-col{display:flex;flex-direction:column;gap:14px;min-width:0}

/* ---------- Stage (CRT) ---------- */
.stage{position:relative;height:420px;border-radius:18px;overflow:hidden;background:#0b0b10;
  box-shadow:0 0 0 1px rgba(0,0,0,.6) inset,0 30px 60px -30px rgba(20,0,30,.55);isolation:isolate}
.stage-inner{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;transform-origin:center}
.stage-hud{position:absolute;top:14px;left:16px;right:16px;display:flex;justify-content:space-between;z-index:3;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:rgba(255,255,255,.55);pointer-events:none;mix-blend-mode:difference}
.rec{display:inline-flex;align-items:center;gap:6px}
.rec i{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:blink 1.2s steps(1) infinite}
.stage.is-paused .rec i{animation:none;opacity:.35}
@keyframes blink{50%{opacity:0}}
.scan{position:absolute;inset:0;pointer-events:none;z-index:2;
  background:repeating-linear-gradient(to bottom,rgba(255,255,255,.035) 0 1px,transparent 1px 3px);
  box-shadow:inset 0 0 120px rgba(0,0,0,.45)}
.stage.is-light .scan{background:repeating-linear-gradient(to bottom,rgba(0,0,0,.035) 0 1px,transparent 1px 3px);box-shadow:inset 0 0 120px rgba(0,0,0,.08)}

/* ---------- Transport ---------- */
.transport{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:10px 14px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.play{width:38px;height:38px;border-radius:50%;border:none;background:var(--ink);color:#fff;display:grid;place-items:center;cursor:pointer;flex:none}
.play svg{fill:currentColor}
.play .i-play{display:none}
.play[aria-pressed="false"] .i-play{display:block}
.play[aria-pressed="false"] .i-pause{display:none}
.frame-ctl{display:flex;align-items:center;gap:12px;flex:1;min-width:200px}
.frame-ctl label{white-space:nowrap}
.frame-ctl b{color:var(--ink);font-weight:500}
.frame-hint{font-size:12px;color:var(--sub)}

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:linear-gradient(90deg,var(--accent),var(--accent-2))}
input[type=range]::-moz-range-track{height:4px;border-radius:4px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;margin-top:-6px;border-radius:3px;background:#fff;border:2px solid var(--ink);box-shadow:2px 0 0 var(--accent),-2px 0 0 var(--accent-2)}
input[type=range]::-moz-range-thumb{width:13px;height:13px;border-radius:3px;background:#fff;border:2px solid var(--ink);box-shadow:2px 0 0 var(--accent),-2px 0 0 var(--accent-2)}

/* ---------- Code ---------- */
.code-card{background:#111116;border-radius:14px;overflow:hidden;color:#e8e6f0}
.code-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;border-bottom:1px solid #26262e}
.code-head .btn{color:#fff;border-color:#3a3a46}
.code-head .btn:hover{background:#24242c}
.tabs{display:flex;gap:4px}
.tab{height:30px;padding:0 14px;border-radius:999px;border:none;background:transparent;color:#9a98a8;font-family:var(--mono);font-size:12px;letter-spacing:.08em;cursor:pointer}
.tab.is-on{background:#24242c;color:#fff}
.code{margin:0;padding:16px 18px;max-height:360px;overflow:auto;font-family:var(--mono);font-size:12.5px;line-height:1.65;white-space:pre;tab-size:2}
.code .k{color:#ff7eb3}.code .p{color:#7dd3fc}.code .v{color:#fde68a}.code .c{color:#6b6a78}.code .s{color:#a7f3d0}

/* ---------- Panel ---------- */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:6px 18px;position:sticky;top:16px}
.group{padding:16px 0;border-bottom:1px solid var(--line-3);display:flex;flex-direction:column;gap:8px}
.group:last-child{border-bottom:none}
.group.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.group.two>div{display:flex;flex-direction:column;gap:8px;min-width:0}
.lbl{font-size:12.5px;font-weight:500;color:var(--ink-2);display:flex;justify-content:space-between;gap:8px}
.lbl--inline{margin-top:6px}
.lbl output,.sl output{font-family:var(--mono);font-size:11.5px;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%}
.sliders{gap:12px}
.sl{display:flex;flex-direction:column;gap:4px}
.sl label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-2)}
.sl-head{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2)}
/* 슬라이더 직접 입력칸 · 단계 버튼: 입력칸 오른쪽 끝을 맞추려고 단위 자리를 고정 폭으로 둠 */
.sl-head .tb-num,.lbl .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,.lbl .tb-num-wrap{width:65px;font-family:var(--mono);font-size:11px;font-weight:400;color:var(--muted);gap:3px}
.sl-head > .tb-num{margin-right:17px}
.panel .tb-presets{margin-top:2px;gap:4px}
.panel .tb-presets button{height:26px;min-width:0;padding:0 9px;font-size:11.5px;border-color:var(--line-2)}
.group.two .tb-presets{gap:3px}
.group.two .tb-presets button{padding:0 6px}
@media (pointer:coarse){.sl-head .tb-num,.lbl .tb-num{height:32px;width:56px;font-size:16px}.sl-head .tb-num-wrap,.lbl .tb-num-wrap{width:73px}.panel .tb-presets button{height:30px}}
.presets{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.preset{height:44px;border-radius:10px;border:1px solid var(--line-2);background:#0b0b10;color:#fff;cursor:pointer;font-weight:700;font-size:13px;position:relative;overflow:hidden;text-align:left;padding:0 12px}
.preset span{position:relative;z-index:1}
.preset::after{content:"";position:absolute;inset:auto 0 0 0;height:3px;background:linear-gradient(90deg,var(--pa),var(--pb))}
.preset:hover{transform:translateY(-1px)}
.preset.is-on{outline:2px solid var(--ink);outline-offset:1px}
.swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.sw{display:flex;flex-direction:column;align-items:center;gap:4px;font-size:11.5px;color:var(--ink-2);cursor:pointer}
.sw input{width:100%;height:36px;border:1px solid var(--line-2);border-radius:8px;padding:2px;background:#fff;cursor:pointer}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:30px;border:none;border-radius:999px;background:transparent;cursor:pointer;font-family:var(--mono);font-size:12px;color:var(--ink-2)}
.seg-btn.is-on{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);cursor:pointer}
.check input{accent-color:var(--ink);width:16px;height:16px}

.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:960px){
  .gl{grid-template-columns:1fr}
  .panel{position:static}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .gl{padding:16px 16px 40px;gap:16px}
  .stage{height:260px;border-radius:14px}
  .frame-hint{display:none}
  .panel{padding:4px 16px}
  .code{font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){
  .rec i{animation:none}
  .toast{transition:none}
}
@media (max-width:960px){
  .stage-col{display:contents}
  .stage{order:1}
  .transport{order:2}
  .panel{order:3}
  .code-card{order:4}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 무대(미리보기)·프리셋 색·코드 블록은 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:#ff4a83; --accent-soft:rgba(255,74,131,.16);
  }
  :root[data-theme="dark"] .btn--solid,
  :root[data-theme="dark"] .play,
  :root[data-theme="dark"] .toast{color:var(--bg)}
  :root[data-theme="dark"] .stage{box-shadow:0 0 0 1px var(--line-2),0 30px 60px -30px rgba(0,0,0,.7)}
  :root[data-theme="dark"] .code-card{box-shadow:0 0 0 1px var(--line)}
  :root[data-theme="dark"] input[type=range]::-webkit-slider-thumb{border-color:var(--bg)}
  :root[data-theme="dark"] input[type=range]::-moz-range-thumb{border-color:var(--bg)}
  :root[data-theme="dark"] .sw input{background:var(--panel-soft)}
  :root[data-theme="dark"] .seg-btn.is-on{background:var(--track);box-shadow:0 1px 3px rgba(0,0,0,.4)}
}