: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:#d92d5a; /* 서브픽셀 크림슨 */
  --accent-soft:rgba(217,45,90,.1);
  --bezel:#18181b; --warn-bg:#fff4e0; --warn-line:#f2c879; --warn-ink:#7a4a00;
  --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)}
.mono{font-family:var(--mono)}
.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:not-allowed}
.btn:disabled:hover{background:transparent}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.btn--big{height:50px;font-size:15px;width:100%;background:var(--accent)}
.btn--big:hover{background:var(--accent);filter:brightness(1.08)}
.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)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
kbd{display:inline-block;min-width:22px;padding:1px 6px;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:5px;background:var(--panel);font-family:var(--mono);font-size:11px;line-height:1.5;text-align:center;color:var(--ink-2)}

.dp{width:100%;max-width:1180px;margin:0 auto;padding:24px 28px 48px;display:flex;flex-direction:column;gap:28px}

/* 작업대: 미리보기 + 패널 */
.bench{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,1fr);gap:24px;align-items:start}
.preview-wrap{display:flex;flex-direction:column;gap:14px;min-width:0}
.preview{position:relative;display:block;width:100%;aspect-ratio:16/10;padding:12px 12px 22px;border:none;border-radius:16px;background:var(--bezel);cursor:pointer;box-shadow:0 24px 40px -26px rgba(0,0,0,.55)}
.preview canvas{display:block;width:100%;height:100%;border-radius:3px;background:#fff}
.preview::after{content:"";position:absolute;left:50%;bottom:8px;width:5px;height:5px;margin-left:-2.5px;border-radius:50%;background:var(--accent);opacity:.9}
.preview-play{position:absolute;left:50%;top:calc(50% - 5px);width:56px;height:56px;margin:-28px 0 0 -28px;display:grid;place-items:center;border-radius:50%;background:rgba(20,20,22,.72);color:#fff;opacity:0;transform:scale(.9);transition:opacity .18s,transform .18s}
.preview:hover .preview-play,.preview:focus-visible .preview-play{opacity:1;transform:none}
.preview-meta{display:flex;align-items:center;gap:18px}
.pv-name{font-size:22px;font-weight:700;letter-spacing:-.02em;margin-top:2px;white-space:nowrap}
.pv-hint{margin:2px 0 0;font-size:13.5px;color:var(--ink-2);line-height:1.6;padding-left:18px;border-left:2px solid var(--accent)}

.panel{display:flex;flex-direction:column;gap:18px;padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:18px}
.field{display:flex;flex-direction:column;gap:10px}
.field--row{flex-direction:row;align-items:center;justify-content:space-between;gap:12px}
.field-label{font-size:13px;font-weight:700}
.field-label small{font-weight:400;color:var(--muted);font-size:11.5px;margin-left:6px}
.swatches{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px}
.sw{position:relative;aspect-ratio:1;padding:0;border:1px solid var(--line-2);border-radius:10px;background:var(--panel-soft);cursor:pointer;overflow:hidden}
.sw-chip{position:absolute;inset:4px;border-radius:6px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}
.sw-chip--gradGray{background:linear-gradient(90deg,#000,#fff)}
.sw-chip--gradHue{background:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,255,255,0) 50%,rgba(0,0,0,0) 50%,rgba(0,0,0,.9)),linear-gradient(90deg,#f00,#ff0,#0f0,#0ff,#00f,#f0f,#f00)}
.sw-chip--grid{background:#000;background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);background-size:8px 8px}
.sw-chip--checker{background:conic-gradient(#000 25%,#fff 0 50%,#000 0 75%,#fff 0) 0 0/50% 50%}
.sw-num{position:absolute;right:5px;bottom:3px;font-family:var(--mono);font-size:9.5px;font-weight:500;color:#fff;mix-blend-mode:difference}
.sw[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}
.sw:hover{border-color:var(--ink-2)}

.custom{display:flex;align-items:center;gap:8px}
.custom input[type=color]{width:40px;height:40px;padding:0;border:1px solid var(--line-2);border-radius:10px;background:none;cursor:pointer}
.custom input[type=color]::-webkit-color-swatch-wrapper{padding:3px}
.custom input[type=color]::-webkit-color-swatch{border:none;border-radius:7px}
.custom .text-input{width:104px;text-transform:uppercase;letter-spacing:.04em}
.opts{display:flex;flex-direction:column;gap:8px}
.check{display:flex;align-items:center;gap:8px;font-size:13.5px;cursor:pointer}
.check input{width:17px;height:17px;margin:0;accent-color:var(--accent)}
.auto{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:4px}
.auto-label{font-size:13.5px}
.seg{display:inline-flex;background:var(--panel-soft);border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px}
.seg-btn{height:28px;padding:0 12px;border:none;border-radius:999px;background:transparent;cursor:pointer;font-size:12.5px;color:var(--ink-2)}
.seg-btn.is-on{background:var(--ink);color:#fff}
.keys{list-style:none;margin:-4px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px 16px;font-size:12.5px;color:var(--sub)}
.keys li{display:flex;align-items:center;gap:4px}
.touch-tip{margin:-6px 0 0;font-size:12px;line-height:1.6;color:var(--muted)}
@media (hover:none){ .keys{display:none} .touch-tip{margin-top:0} }

/* 안내 카드 */
.sec-title{margin:0;font-size:17px;font-weight:700;letter-spacing:-.01em}
.guide{display:flex;flex-direction:column;gap:14px}
.guide-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.g-card{padding:18px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.g-card h3{margin:12px 0 6px;font-size:14.5px}
.g-card p{margin:0;font-size:13px;line-height:1.65;color:var(--ink-2)}
.g-card b{color:var(--ink);font-weight:500}
.g-sw{display:block;width:34px;height:34px;border-radius:9px;border:1px solid var(--line-2)}
.g-sw--bleed{background:radial-gradient(circle at 0 0,rgba(255,255,255,.55),transparent 55%),radial-gradient(circle at 100% 100%,rgba(255,255,255,.4),transparent 50%),#0b0b0c}
.g-sw--grad{background:linear-gradient(90deg,#000 0 20%,#333 0 40%,#777 0 60%,#bbb 0 80%,#fff 0)}
.note{margin:0;font-size:12.5px;line-height:1.7;color:var(--sub)}

/* 깜빡임 도우미 카드 */
.flash-card{display:flex;flex-direction:column;gap:14px;padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:18px}
.flash-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.warn{padding:14px 16px;border-radius:12px;background:var(--warn-bg);border:1px solid var(--warn-line);color:var(--warn-ink)}
.warn strong{display:block;font-size:14px;margin-bottom:4px}
.warn p{margin:0;font-size:13px;line-height:1.7}
.warn kbd{color:var(--warn-ink)}
.warn-reduce{margin:0;font-size:13px;color:var(--accent)}
.flash-desc{margin:0;font-size:13.5px;line-height:1.7;color:var(--ink-2)}
.flash-ctrl{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.check--warn{font-weight:500}

/* 전체 화면 오버레이 */
.dp-lock,.dp-lock body{overflow:hidden}
.fs,.flash{position:fixed;inset:0;z-index:2147483000;background:#000;color:#fff;outline:none;user-select:none;-webkit-user-select:none;touch-action:manipulation}
.fs-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.fs.hide-cursor,.fs.hide-cursor *{cursor:none !important}
.hud{position:absolute;left:50%;bottom:28px;transform:translate(-50%,8px);display:flex;align-items:center;gap:12px;padding:10px 18px;border-radius:999px;background:rgba(18,18,20,.82);color:#fff;font-size:13px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;max-width:calc(100vw - 32px)}
.hud-idx{font-family:var(--mono);font-size:12px;color:#ff8fab}
.hud-name{font-weight:700}
.hud-keys{color:#bdbdc4;font-size:12px}
.fs-close{position:absolute;top:16px;right:16px;height:40px;padding:0 18px;border:none;border-radius:999px;background:rgba(18,18,20,.82);color:#fff;font-size:14px;font-weight:500;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .25s}
.fs.show-hud .hud{opacity:1;transform:translate(-50%,0)}
.fs.show-hud .fs-close{opacity:1;pointer-events:auto}
.fs:not(.hide-cursor) .fs-close{opacity:1;pointer-events:auto}

.flash-bar{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:12px 16px;background:#111114;border-bottom:1px solid #2a2a30;z-index:2}
.flash-time{font-size:13px;color:#c8c8d0;min-width:44px}
.seg--dark{background:#1d1d22;border-color:#33333a}
.seg--dark .seg-btn{color:#c8c8d0}
.seg--dark .seg-btn.is-on{background:#f4f4f6;color:#111}
.flash-stop{height:34px;padding:0 16px;border:none;border-radius:999px;background:#ff5577;color:#111;font-size:13px;font-weight:700;cursor:pointer}
.flash-box{position:absolute;left:0;top:0;width:120px;height:120px;background:#f00;cursor:grab;touch-action:none;box-shadow:0 0 0 1px #444}
.flash-box:active{cursor:grabbing}
.flash-tip{position:absolute;left:0;right:0;bottom:20px;margin:0;text-align:center;font-size:12.5px;color:#8b8b94;pointer-events:none}

@media (max-width:900px){
  .bench{grid-template-columns:1fr}
  .guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .dp{padding:16px 16px 40px;gap:22px}
  .preview{padding:8px 8px 16px;border-radius:12px}
  .preview-meta{flex-direction:column;gap:8px}
  .pv-hint{padding-left:12px}
  .panel,.flash-card{padding:18px;border-radius:16px}
  .guide-grid{grid-template-columns:1fr}
  .hud-keys{display:none}
  .flash-bar{gap:8px;padding:10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}

/* 다크 모드 (인쇄는 라이트 그대로). 테스트 화면 · 패턴 색은 테마와 무관 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141317; --surface:#19181d; --panel:#1f1e24; --panel-soft:#25242b;
    --ink:#eeecf1; --ink-hover:#ffffff; --ink-2:#cbc8d0; --sub:#a29fa9; --muted:#8c8994;
    --line:#2f2d35; --line-2:#3a3841; --line-3:#28272e; --hover:#2a2930; --soft:#28272e; --track:#35343c;
    --accent:#ff6b8f; --accent-soft:rgba(255,107,143,.16);
    --bezel:#0a0a0c; --warn-bg:rgba(251,191,36,.1); --warn-line:rgba(251,191,36,.35); --warn-ink:#fcd58a;
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .seg-btn.is-on{color:var(--bg)}
  :root[data-theme="dark"] .btn--big{color:#1a0a10}
  :root[data-theme="dark"] .btn--solid{background:var(--accent);color:#1a0a10}
  :root[data-theme="dark"] .btn--solid:hover{background:#ff8aa7}
  :root[data-theme="dark"] .seg-btn.is-on:not(.seg--dark .seg-btn){background:var(--accent);color:#1a0a10}
  :root[data-theme="dark"] .preview{box-shadow:0 0 0 1px var(--line-2),0 24px 40px -26px rgba(0,0,0,.8)}
  :root[data-theme="dark"] .seg--dark .seg-btn.is-on{color:#111}
}