: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:#6a4fd8; /* 자판 보라 */
  --accent-soft:rgba(106,79,216,.1);
  --key:#ffffff; --key-edge:#d9d6ce;
  --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,select,input,textarea{font:inherit;color:inherit}
.mono{font-family:var(--mono)}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:calc(100vh - 48px);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:32px;padding:0 13px;font-size:12.5px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.kc{width:100%;max-width:1180px;margin:0 auto;padding:24px 28px 48px;display:flex;flex-direction:column;gap:16px}

/* ---------- 설정 ---------- */
.ctrl{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px}
.seg{display:inline-flex;padding:4px;background:var(--panel);border:1px solid var(--line);border-radius:999px;gap:2px;max-width:100%}
.seg button{height:34px;padding:0 15px;border:none;background:transparent;border-radius:999px;font-size:13.5px;cursor:pointer;color:var(--ink-2);white-space:nowrap}
.seg button:hover{color:var(--ink)}
.seg button[aria-pressed="true"]{background:var(--accent);color:#fff;font-weight:500}
.tog{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-2);cursor:pointer;line-height:1.4}
.tog small{color:var(--muted);font-size:12px}
.tog input{position:absolute;opacity:0;width:1px;height:1px}
.tog-ui{flex:0 0 32px;height:19px;border-radius:999px;background:var(--line-2);position:relative;transition:background .15s}
.tog-ui::after{content:"";position:absolute;left:2px;top:2px;width:15px;height:15px;border-radius:50%;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .15s}
.tog input:checked + .tog-ui{background:var(--accent)}
.tog input:checked + .tog-ui::after{transform:translateX(13px)}
.tog input:focus-visible + .tog-ui{outline:2px solid var(--accent);outline-offset:2px}
.tog.is-dim{opacity:.45}

/* ---------- 입력 · 결과 ---------- */
.panes{display:grid;grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr);gap:10px;align-items:stretch}
.pane{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:18px;overflow:hidden;min-width:0}
.pane--out{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));box-shadow:0 1px 0 var(--accent-soft),0 10px 30px -18px color-mix(in srgb,var(--accent) 60%,transparent)}
.pane-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 14px 11px 16px;border-bottom:1px solid var(--line-3);flex-wrap:wrap;min-height:50px}
.pane-title{font-size:14px;font-weight:700}
.pane--out .pane-title{color:var(--accent)}
.pane-sub{font-size:12px;color:var(--muted)}
.samples{display:flex;flex-wrap:wrap;gap:5px}
.chip{height:26px;padding:0 10px;border:1px solid var(--line-2);background:var(--panel-soft);border-radius:999px;font-size:12px;cursor:pointer;color:var(--ink-2)}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.pane textarea{flex:1;display:block;width:100%;min-height:300px;resize:vertical;border:none;outline:none;margin:0;padding:16px;font-size:17px;line-height:1.75;color:var(--ink);background:transparent;font-family:var(--font)}
.pane textarea::placeholder{color:#aaa69c}
.output{flex:1;min-height:300px;padding:16px;font-size:17px;line-height:1.75;white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;background:color-mix(in srgb,var(--accent) 3%,var(--panel))}
.output .ph{color:#aaa69c}
.output mark{background:var(--accent-soft);color:inherit;border-radius:4px;padding:0 1px;box-shadow:inset 0 -2px 0 color-mix(in srgb,var(--accent) 55%,transparent)}
.run{display:inline;font:inherit;line-height:inherit;padding:0 1px;margin:0;border:none;background:transparent;cursor:pointer;border-radius:4px;color:inherit;text-decoration:underline dotted color-mix(in srgb,var(--muted) 70%,transparent);text-underline-offset:4px}
.run:hover{background:var(--hover)}
.run.is-on{text-decoration:none;background:var(--accent-soft);box-shadow:inset 0 -2px 0 color-mix(in srgb,var(--accent) 55%,transparent)}
.run.is-on:hover{background:color-mix(in srgb,var(--accent) 18%,transparent)}
.pane-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px 10px 16px;border-top:1px solid var(--line-3)}
.status{margin:0;font-size:12.5px;color:var(--sub);line-height:1.5;min-width:0}
.swap{align-self:center;width:44px;height:44px;border-radius:50%;border:1px solid var(--line-2);background:var(--panel);cursor:pointer;color:var(--accent);display:flex;align-items:center;justify-content:center;padding:0;transition:transform .2s,background .15s}
.swap:hover{background:var(--accent-soft);transform:rotate(180deg)}
.hint{margin:0;padding:10px 14px;border-radius:12px;background:var(--accent-soft);font-size:13px;color:var(--ink-2);line-height:1.6}
.link{border:none;background:none;padding:0;color:var(--accent);font-weight:700;text-decoration:underline;text-underline-offset:3px;cursor:pointer}

/* ---------- 자판 ---------- */
.kb-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px 22px 18px;display:flex;flex-direction:column;gap:16px}
.kb-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.kb-title{margin:0 0 4px;font-size:15px;font-weight:700}
.kb-desc{margin:0;font-size:12.5px;color:var(--sub);line-height:1.55}
.kb{--g:7px;--k:calc((100% - 9 * var(--g)) / 10);display:flex;flex-direction:column;gap:var(--g);max-width:640px;width:100%;margin:0 auto}
.kb-row{display:flex;gap:var(--g);width:100%}
.kb-row--1 .key:first-child{margin-left:calc(var(--k) * .4)}
.kb-row--2 .key:first-child{margin-left:calc(var(--k) * 1.2)}
.key{position:relative;flex:0 0 var(--k);aspect-ratio:1/1;min-width:0;border-radius:10px;background:var(--key);border:1px solid var(--key-edge);box-shadow:0 2px 0 var(--key-edge);display:flex;align-items:center;justify-content:center;transition:transform .12s,background .15s,box-shadow .12s}
.key b{font-size:clamp(14px,3.2vw,21px);font-weight:500;line-height:1}
.key i{position:absolute;left:6px;top:4px;font-style:normal;font-family:var(--mono);font-size:clamp(9px,1.6vw,11px);color:var(--muted)}
.key s{position:absolute;right:5px;top:4px;text-decoration:none;font-size:clamp(9px,1.6vw,11px);color:var(--accent);font-weight:500}
.key--v b{color:var(--accent)}
.kb.is-shift .key--dbl{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 45%,var(--key-edge))}
.kb.is-shift .key:not(.key--dbl){opacity:.55}
.key.is-hit{background:var(--accent);border-color:var(--accent);box-shadow:0 0 0 var(--key-edge);transform:translateY(2px)}
.key.is-hit b,.key.is-hit i,.key.is-hit s{color:#fff}
.notes{margin:0;padding:0 0 0 18px;display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--sub);line-height:1.65}
.notes b{color:var(--ink-2);font-weight:600}

.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;max-width:calc(100vw - 32px);text-align:center}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

@media (max-width:820px){
  .panes{grid-template-columns:minmax(0,1fr)}
  .swap{justify-self:center;transform:rotate(90deg)}
  .swap:hover{transform:rotate(270deg)}
  .pane textarea,.output{min-height:180px}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .kc{padding:16px 16px 40px;gap:14px}
  .seg{width:100%}
  .seg button{flex:1;padding:0 6px;font-size:13px}
  .pane textarea,.output{font-size:16px;padding:14px}
  .kb-card{padding:16px 12px 14px}
  .kb{--g:4px}
  .key{border-radius:7px}
  .key{flex-direction:column;gap:1px}
  .key b{font-size:15px}
  .key i{position:static;font-size:9px;line-height:1}
  .key s{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* 다크 모드 (인쇄는 라이트 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:#a996ff; --accent-soft:rgba(169,150,255,.16);
    --key:#26252e; --key-edge:#3a3944;
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast,:root[data-theme="dark"] .seg button[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .btn--solid{background:var(--accent)}
  :root[data-theme="dark"] .btn--solid:hover{background:color-mix(in srgb,var(--accent) 82%,#fff)}
  :root[data-theme="dark"] .tog-ui::after{background:#ecebf0}
  :root[data-theme="dark"] .tog input:checked + .tog-ui::after{background:var(--bg)}
  :root[data-theme="dark"] .pane textarea::placeholder,:root[data-theme="dark"] .output .ph{color:#6f6d7a}
  :root[data-theme="dark"] .key.is-hit b,:root[data-theme="dark"] .key.is-hit i,:root[data-theme="dark"] .key.is-hit s{color:var(--bg)}
}