: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:#fcc419; /* 정산 옐로 */
  --accent-deep:#e6a700;
  --accent-soft:#fff6d6;
  --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{font:inherit;color:inherit}
.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}
.home{font-size:13px;color:var(--ink-2);text-decoration:none}
.home:hover{color:var(--ink)}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer;flex-shrink:0}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.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);min-width:0;width:100%}
.text-input:focus,.money-input:focus{outline:none;border-color:var(--ink)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hint{font-size:12px;color:var(--muted);margin:0;line-height:1.6}

.wrap{width:100%;max-width:1120px;margin:0 auto;padding:28px 28px 64px;display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:28px;align-items:start}
.inputs{display:flex;flex-direction:column;gap:16px;min-width:0}

.tabs{display:flex;gap:4px;background:var(--track);padding:4px;border-radius:999px;align-self:flex-start}
.tab{height:38px;padding:0 20px;border:none;background:transparent;border-radius:999px;font-size:14px;color:var(--sub);cursor:pointer;white-space:nowrap}
.tab.is-active{background:var(--ink);color:#fff;font-weight:500}

.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:20px;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.field{display:flex;flex-direction:column;gap:8px;min-width:0}
.field > label,.field-label{font-size:13px;color:var(--ink-2)}
.field em{font-style:normal;color:var(--muted)}
.field--row{flex-direction:row;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.field--row .select{width:auto;min-width:140px}

.money{display:flex;align-items:baseline;gap:8px;border-bottom:3px solid var(--ink);padding-bottom:4px}
.money-input{flex:1;min-width:0;border:none;background:transparent;font-family:var(--mono);font-size:44px;font-weight:500;letter-spacing:-.03em;padding:0;color:var(--ink)}
.money-input::placeholder{color:#cfcbc0}
.money span{font-size:20px;font-weight:500}

.stepper{display:flex;align-items:center;gap:6px;align-self:flex-start;background:var(--soft);border-radius:999px;padding:5px}
.step{width:44px;height:44px;border-radius:50%;border:none;background:#fff;font-size:20px;cursor:pointer;box-shadow:0 1px 3px rgba(0,0,0,.1);transition:transform .1s}
.step:active{transform:scale(.92)}
.step-input{width:64px;border:none;background:transparent;text-align:center;font-family:var(--mono);font-size:26px;font-weight:500;color:var(--ink);-moz-appearance:textfield;appearance:textfield}
.step-input::-webkit-outer-spin-button,.step-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.step-input:focus{outline:none}
.step-unit{font-size:15px;margin-right:8px}

/* people chips */
.people{display:flex;flex-wrap:wrap;gap:6px}
.person{display:flex;align-items:center;gap:2px;height:34px;padding:0 4px 0 14px;border-radius:999px;background:var(--ink);color:#fff;font-size:13px}
.person button{width:26px;height:26px;border:none;background:transparent;color:#bdbab1;border-radius:50%;cursor:pointer;font-size:14px}
.person button:hover{background:rgba(255,255,255,.15);color:#fff}
.add-person{display:flex;gap:8px}

/* items */
.items{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;counter-reset:item}
.item{border:1px solid var(--line);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:10px;background:var(--panel-soft);animation:fade .2s ease}
.item.is-orphan{border-color:#f08c00;background:#fff8ec}
.item-top{display:grid;grid-template-columns:minmax(0,1fr) 140px auto;gap:8px;align-items:center}
.item-top .text-input{background:#fff}
.item-price{font-family:var(--mono);text-align:right}
.item-del{width:36px;height:36px;border:none;background:transparent;border-radius:50%;color:var(--muted);cursor:pointer;font-size:16px}
.item-del:hover{background:#fbeaea;color:#c92a2a}
.who{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.who-btn{height:30px;padding:0 12px;border-radius:999px;border:1px dashed var(--line-2);background:transparent;color:var(--muted);font-size:12px;cursor:pointer;transition:background .12s,color .12s,border-color .12s}
.who-btn.is-on{background:var(--accent);border:1px solid var(--accent);color:var(--ink);font-weight:500}
.who-all{border-style:solid;color:var(--ink-2)}
.who-split{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--sub)}
.add-item{height:44px;border:1.5px dashed var(--line-2);border-radius:14px;background:transparent;font-size:14px;color:var(--ink-2);cursor:pointer}
.add-item:hover{border-color:var(--ink);color:var(--ink)}

.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px;flex-wrap:wrap}
.seg-btn{height:32px;padding:0 12px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap}
.seg-btn.is-active{background:#fff;color:var(--ink);font-weight:500;box-shadow:0 1px 3px rgba(0,0,0,.12)}

/* ---------- Receipt ---------- */
.receipt-col{position:sticky;top:20px;display:flex;flex-direction:column;gap:12px}
.receipt-shadow{filter:drop-shadow(0 14px 22px rgba(40,36,28,.13))}
.receipt{position:relative;background:#fff;padding:26px 24px 20px;font-family:var(--mono);
  -webkit-mask:radial-gradient(circle at 8px 0,transparent 6px,#000 6.5px) 0 0/16px 51% repeat-x,radial-gradient(circle at 8px 100%,transparent 6px,#000 6.5px) 0 100%/16px 51% repeat-x;
  mask:radial-gradient(circle at 8px 0,transparent 6px,#000 6.5px) 0 0/16px 51% repeat-x,radial-gradient(circle at 8px 100%,transparent 6px,#000 6.5px) 0 100%/16px 51% repeat-x}
.r-head{display:flex;justify-content:space-between;align-items:center;padding-bottom:14px;border-bottom:2px solid var(--ink)}
.r-logo{font-family:var(--font);font-weight:700;font-size:20px;background:var(--accent);padding:2px 10px;border-radius:6px}
.r-body{padding:14px 0 6px;font-size:13px;color:var(--ink-2)}
.r-line{display:flex;justify-content:space-between;gap:10px;padding:4px 0}
.r-line span:first-child{font-family:var(--font)}
.r-line span:last-child{text-align:right;color:var(--ink);white-space:nowrap}
.r-sep{border:none;border-top:1px dashed var(--line-2);margin:10px 0}
.r-big{text-align:center;padding:16px 0 8px}
.r-big .k{font-family:var(--font);font-size:13px;color:var(--sub)}
.r-big .v{display:inline-block;margin-top:6px;font-size:44px;font-weight:500;letter-spacing:-.04em;color:var(--ink);line-height:1.1;background:linear-gradient(transparent 58%,var(--accent) 58%);padding:0 4px;overflow-wrap:anywhere}
.r-big .v small{font-family:var(--font);font-size:18px;margin-left:2px}
.r-big.pop .v{animation:pop .35s cubic-bezier(.2,.9,.3,1.3)}
@keyframes pop{from{transform:scale(.92);opacity:.4}to{transform:none;opacity:1}}
.r-person{padding:8px 0;border-bottom:1px dotted var(--line-2)}
.r-person:last-child{border-bottom:none}
.r-person .r-line{padding:0;font-size:15px}
.r-person .name{font-family:var(--font);font-weight:700;color:var(--ink)}
.r-person .amt{font-weight:500;color:var(--ink)}
.r-person .detail{font-family:var(--font);font-size:11px;color:var(--muted);margin-top:2px;line-height:1.5}
.r-person .send{font-family:var(--font);font-size:11px;color:#8a6400;background:var(--accent-soft);border-radius:4px;padding:1px 6px;margin-left:6px}
.r-note{font-family:var(--font);font-size:12px;line-height:1.6;color:var(--sub)}
.r-warn{font-family:var(--font);font-size:12px;color:#d9480f}
.r-empty{font-family:var(--font);text-align:center;color:var(--muted);padding:24px 0;font-size:14px}
.barcode{height:36px;margin-top:10px;background:repeating-linear-gradient(90deg,var(--ink) 0 2px,transparent 2px 4px,var(--ink) 4px 5px,transparent 5px 8px,var(--ink) 8px 11px,transparent 11px 13px);opacity:.85}

.copy-btn{height:52px;border:none;border-radius:999px;background:var(--accent);color:var(--ink);font-size:15px;font-weight:700;cursor:pointer;transition:background .15s,transform .1s}
.copy-btn:hover{background:var(--accent-deep)}
.copy-btn:active{transform:scale(.98)}

.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:10}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr)}
  .receipt-col{position:static}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:16px 16px 48px;gap:20px}
  .tabs{align-self:stretch}
  .tab{flex:1}
  .card{padding:16px;gap:18px}
  .money-input{font-size:36px}
  .item-top{grid-template-columns:minmax(0,1fr) 110px auto;gap:6px}
  .item{padding:10px}
  .field--row .select{flex:1}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) · 복사되는 정산 텍스트는 테마와 무관 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#151412; --surface:#1b1a17; --panel:#201f1c; --panel-soft:#262521;
    --ink:#edebe6; --ink-hover:#ffffff; --ink-2:#cac7bf; --sub:#a29f96; --muted:#8c897f;
    --line:#302e2a; --line-2:#3b3934; --line-3:#2a2925; --hover:#2c2b27; --soft:#282723; --track:#36342f;
    --accent:#fcc419; --accent-deep:#ffd54a; --accent-soft:rgba(252,196,25,.14);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .tab.is-active,
  :root[data-theme="dark"] .toast{color:var(--bg)}
  /* 노란 면 위 글자는 진하게 */
  :root[data-theme="dark"] .who-btn.is-on,:root[data-theme="dark"] .copy-btn,
  :root[data-theme="dark"] .r-logo{color:#1c1c1a}
  :root[data-theme="dark"] .money-input::placeholder{color:#58554d}
  :root[data-theme="dark"] .step{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .person{background:#3a3833;color:var(--ink)}
  :root[data-theme="dark"] .person button:hover{background:rgba(255,255,255,.12)}
  :root[data-theme="dark"] .item.is-orphan{border-color:#f0a030;background:rgba(240,140,0,.1)}
  :root[data-theme="dark"] .item-top .text-input{background:var(--surface)}
  :root[data-theme="dark"] .item-del:hover{background:rgba(240,90,90,.14);color:#f08a8a}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  /* 영수증: 밤에는 어두운 감열지 느낌으로 */
  :root[data-theme="dark"] .receipt{background:var(--panel-soft)}
  :root[data-theme="dark"] .receipt-shadow{filter:drop-shadow(0 14px 22px rgba(0,0,0,.45))}
  :root[data-theme="dark"] .r-big .v{background:linear-gradient(transparent 58%,rgba(252,196,25,.32) 58%)}
  :root[data-theme="dark"] .r-person .send{color:#f7d35c}
  :root[data-theme="dark"] .r-warn{color:#f5895a}
}