: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:#0b7a75; --accent-soft:rgba(11,122,117,.12); --on-accent:#fff;
  --warn:#9a5b00; --warn-bg:#fff4e0; --err:#b3261e; --err-bg:#fdecea;
  --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)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hint{font-size:12px;line-height:1.55;color:var(--muted);margin:0}
.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;align-items:center;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--accent{background:var(--accent);color:var(--on-accent);border:none;font-weight:500}
.btn--accent:hover{filter:brightness(1.08);background:var(--accent)}
.btn--light{border-color:rgba(255,255,255,.22);color:#efeee9}
.btn--light:hover{background:rgba(255,255,255,.08)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* 탭 */
.tabs{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.tab{height:32px;padding:0 16px;background:transparent;border:none;border-radius:999px;color:var(--sub);font-size:13px;cursor:pointer;white-space:nowrap}
.tab[aria-selected="true"]{background:var(--ink);color:#fff;font-weight:500}

/* 레이아웃 */
.layout{flex:1;display:flex;flex-wrap:wrap;align-items:flex-start;min-height:0}
.panel{flex:1 1 340px;max-width:420px;min-width:0;align-self:stretch;border-right:1px solid var(--line);padding:22px 24px 40px;display:flex;flex-direction:column;gap:22px;background:var(--panel)}
.stage{flex:999 1 480px;min-width:0;display:flex;flex-direction:column;gap:16px;padding:28px 28px 48px}
.group{display:flex;flex-direction:column;gap:12px}
.group--line{border-top:1px solid var(--line-3);padding-top:20px}
.group-head{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.g-title{margin:0;font-size:14px;font-weight:700;letter-spacing:-.01em}
.sub-panel{display:flex;flex-direction:column;gap:12px}

/* 입력 */
.pair{display:grid;grid-template-columns:minmax(0,1fr) 16px minmax(0,1fr);gap:8px;align-items:end}
.pair-dash{text-align:center;color:var(--muted);font-size:13px;padding-bottom:10px}
.fld{display:flex;flex-direction:column;gap:6px;min-width:0}
.fld--inline{flex-direction:row;align-items:center;gap:10px}
.fld-k{font-size:12.5px;color:var(--ink-2)}
.fld-in{position:relative;display:block}
.fld-in input{width:100%;height:40px;padding:0 34px 0 12px;background:var(--surface);color:var(--ink);border:1px solid var(--line-2);border-radius:10px;font-family:var(--mono);font-size:14px;text-align:right}
.fld-in--text input{padding:0 12px;text-align:left}
.fld--inline .fld-in{width:96px}
.fld-in i{position:absolute;right:11px;top:50%;transform:translateY(-50%);font-style:normal;font-family:var(--mono);font-size:11px;color:var(--muted);pointer-events:none}
.fld-in input:focus,.sel:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.fld-in input.is-bad{border-color:var(--err)}
.fld-in input::-webkit-outer-spin-button,.fld-in input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.fld-in input[type=number]{-moz-appearance:textfield;appearance:textfield}
.sel{width:100%;height:40px;padding:0 10px;background:var(--surface);color:var(--ink);border:1px solid var(--line-2);border-radius:10px;font:inherit;font-size:13px}
.sel--sm{width:76px}
.row-set{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.check{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--ink-2);cursor:pointer;line-height:1.45}
.check input{width:16px;height:16px;margin:2px 0 0;accent-color:var(--accent);flex:0 0 auto}
.check em{font-style:normal;font-family:var(--mono);font-size:11px;color:var(--muted)}

.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{height:30px;padding:0 11px;border:1px solid var(--line-2);border-radius:999px;background:transparent;font-family:var(--mono);font-size:11.5px;color:var(--ink-2);cursor:pointer;white-space:nowrap}
.chip:hover{border-color:var(--accent);color:var(--ink)}
.chip.is-active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:500}

.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{min-width:52px;height:30px;padding:0 12px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-family:var(--mono);font-size:12px;cursor:pointer}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12);font-weight:500}

/* 코드 카드 */
.code-card{display:flex;flex-direction:column;gap:14px;padding:18px 18px 16px;background:#1c1c1a;border-radius:18px;color:#efeee9;position:relative;overflow:hidden}
.code-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent)}
.code-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.mono-label--light{color:#9c998f}
.code-meta{font-family:var(--mono);font-size:11px;color:#9c998f}
.big-code{display:block;font-family:var(--mono);font-size:clamp(15px,1.2rem + .5vw,24px);line-height:1.45;font-weight:500;word-break:break-word;color:#fff}
.big-code .fn{color:#7fd8cf}
.big-code .n{color:#ffd28a}
.big-code .u{color:#b9b6ab}
.code{margin:0;font-family:var(--mono);font-size:13px;line-height:1.7;white-space:pre-wrap;word-break:break-word;color:#efeee9;max-height:360px;overflow:auto}
.code .k{color:#7fd8cf}
.code .n{color:#ffd28a}
.code .c{color:#8a877f}
.code-actions{display:flex;justify-content:flex-end;gap:8px;flex-wrap:wrap}

.msg{margin:0;padding:10px 14px;border-radius:12px;font-size:13px;line-height:1.55}
.msg--err{background:var(--err-bg);color:var(--err)}
.msg--warn{background:var(--warn-bg);color:var(--warn)}

/* 표 */
.table-wrap{background:var(--panel);border:1px solid var(--line);border-radius:16px;overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th{font-weight:500;color:var(--muted);font-size:11.5px;text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
.tbl td{padding:8px 12px;border-bottom:1px solid var(--line-3);font-family:var(--mono);font-size:12.5px;white-space:nowrap}
.tbl tr:last-child td{border-bottom:none}
.tbl .num{text-align:right}
.tbl .name{color:var(--accent);font-weight:500}
.tbl .now{color:var(--ink);font-weight:500}
.mini-copy{height:28px;padding:0 10px;border:1px solid var(--line-2);border-radius:999px;background:transparent;font-size:11.5px;cursor:pointer;color:var(--ink-2)}
.mini-copy:hover{border-color:var(--accent);color:var(--accent)}

/* 미리보기 */
.preview-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px 18px 16px;display:flex;flex-direction:column;gap:12px;min-width:0}
.pv-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap}
.pv-title{display:flex;flex-direction:column;gap:3px}
.pv-width{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.pv-width .tb-num{width:68px;height:32px;background:var(--surface);border-color:var(--line-2);color:var(--ink)}
.pv-now{font-family:var(--mono);font-size:12px;color:var(--accent);font-weight:500}
input[type=range]{width:100%;accent-color:var(--accent);margin:0}
.preview-card .tb-presets{margin-top:0}
.chart{position:relative;height:120px;border-radius:12px;background:var(--panel-soft);overflow:hidden}
.chart svg{display:block;width:100%;height:100%}
.chart .ax{stroke:var(--line-2);stroke-width:1}
.chart .ln{fill:none;stroke:var(--accent);stroke-width:2;vector-effect:non-scaling-stroke}
.chart .ln--dim{stroke-opacity:.45;stroke-width:1.5}
.chart .zone{fill:var(--accent-soft)}
.chart .cur{stroke:var(--ink);stroke-width:1;stroke-dasharray:3 3;vector-effect:non-scaling-stroke}
.chart-lbl{position:absolute;font-family:var(--mono);font-size:10px;color:var(--muted);pointer-events:none;white-space:nowrap}

.pv-outer{position:relative;padding-right:22px;min-width:0}
.pv-frame{background:#fff;color:#1c1c1a;border-radius:12px;box-shadow:0 0 0 1px rgba(0,0,0,.08),0 18px 40px -24px rgba(40,36,28,.35);overflow:hidden;transform-origin:0 0;container-type:inline-size;container-name:pv}
.pv-bar{display:flex;align-items:center;gap:5px;height:28px;padding:0 12px;background:#f1f0ec;border-bottom:1px solid #e3e1db}
.pv-bar i{width:8px;height:8px;border-radius:999px;background:#d6d3cb}
.pv-bar span{margin-left:auto;font-family:var(--mono);font-size:11px;color:#7a776f}
.pv-body{padding:28px 28px 32px}
.pv-text{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.2;outline:none;word-break:keep-all;overflow-wrap:anywhere}
.pv-text:focus-visible{box-shadow:0 0 0 2px var(--accent);border-radius:4px}
.pv-scale{display:flex;flex-direction:column;gap:10px}
.pv-row{display:flex;flex-direction:column;gap:2px}
.pv-row small{font-family:var(--mono);font-size:11px;color:#8a877f;letter-spacing:.04em}
.pv-row p{margin:0;line-height:1.2;letter-spacing:-.01em;word-break:keep-all;overflow-wrap:anywhere}
.pv-row.is-head p{font-weight:700;letter-spacing:-.02em}
.pv-handle{position:absolute;top:0;bottom:0;width:22px;cursor:ew-resize;touch-action:none;display:flex;align-items:center;justify-content:center}
.pv-handle span{width:6px;height:44px;border-radius:999px;background:var(--accent);box-shadow:0 0 0 3px var(--panel)}
.pv-handle:hover span,.pv-handle.is-drag span{height:60px}

/* 토스트 */
.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(100% - 32px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.toast.is-on{opacity:1;transform:translate(-50%,0)}
.toast b{font-family:var(--mono);font-weight:500;margin-left:6px}

@media (max-width:860px){
  .panel{max-width:none;border-right:none;border-bottom:1px solid var(--line)}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .actions,.tabs{width:100%}
  .tab{flex:1}
  .panel{padding:20px 16px 28px}
  .stage{padding:20px 16px 32px}
  .code-card{padding:16px 14px 14px}
  .code-actions .btn{flex:1 1 auto}
  .preview-card{padding:14px 12px}
  .pv-body{padding:20px 18px 24px}
  .fld-in input{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 미리보기 프레임은 웹페이지 모습이라 밝게 둠 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#121616; --surface:#181d1d; --panel:#1d2222; --panel-soft:#222828;
    --ink:#e9eeed; --ink-hover:#ffffff; --ink-2:#c3cbca; --sub:#9aa5a3; --muted:#86918f;
    --line:#2a3131; --line-2:#354040; --line-3:#232a2a; --hover:#263030; --soft:#232a2a; --track:#323b3b;
    --accent:#4fd1c5; --accent-soft:rgba(79,209,197,.16); --on-accent:#0e1414;
    --warn:#ffc46b; --warn-bg:rgba(255,196,107,.12); --err:#ff8a80; --err-bg:rgba(255,138,128,.12);
  }
  :root[data-theme="dark"] .tab[aria-selected="true"]{background:var(--line-2);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .toast,
  :root[data-theme="dark"] .tb-presets button[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .code-card{background:#0d1111;box-shadow:inset 0 0 0 1px var(--line-2)}
  :root[data-theme="dark"] .pv-frame{box-shadow:0 0 0 1px var(--line-2),0 18px 40px -24px rgba(0,0,0,.6)}
}