: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:#d98a00; /* 저금통 골드 */
  --accent-deep:#9a5b00;
  --accent-soft:#fdf1d8;
  --coin:#ffc53d;
  --principal:#4a3b2a;
  --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;word-break:keep-all}
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}
.actions{display:flex;gap:8px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.wrap{width:100%;max-width:1080px;margin:0 auto;padding:32px 28px 56px;display:flex;flex-direction:column;gap:22px}

/* ---------- 종류 탭 ---------- */
.kind{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:440px}
.kind-tab{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:14px 18px;border:1.5px solid var(--line-2);border-radius:16px;background:var(--panel);cursor:pointer;text-align:left;transition:border-color .15s,background .15s,transform .1s}
.kind-tab b{font-size:18px}
.kind-tab span{font-size:12px;color:var(--muted)}
.kind-tab:hover{border-color:var(--accent)}
.kind-tab[aria-selected="true"]{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 6px 18px rgba(217,138,0,.15)}
.kind-tab[aria-selected="true"] b{color:var(--accent-deep)}

/* ---------- 계산 영역 ---------- */
.calc{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);background:var(--panel);border:1px solid var(--line);border-radius:24px;overflow:hidden}
.form{padding:24px;display:flex;flex-direction:column;gap:18px;border-right:1px solid var(--line)}
.field{display:flex;flex-direction:column;gap:8px;min-width:0}
.label{font-size:13px;font-weight:700}
.box{display:flex;align-items:center;border:1.5px solid var(--line-2);border-radius:12px;background:var(--surface);padding:0 14px;transition:border-color .15s,box-shadow .15s}
.box:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.box-input{flex:1;min-width:0;height:50px;border:none;background:transparent;font-family:var(--mono);font-size:20px;color:var(--ink);outline:none;text-align:right;-moz-appearance:textfield}
.box-input::-webkit-outer-spin-button,.box-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.box--sm .box-input{height:44px;font-size:17px}
.box-unit{margin-left:8px;color:var(--sub)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{height:30px;padding:0 12px;border:1px solid var(--line-2);background:#fff;border-radius:999px;font-size:12.5px;cursor:pointer}
.chip:hover{border-color:var(--accent);color:var(--accent-deep)}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:var(--soft);border-radius:12px;padding:4px}
.seg--3{grid-template-columns:repeat(3,1fr)}
.seg button{min-height:40px;border:none;border-radius:9px;background:transparent;cursor:pointer;font-size:13px;color:var(--ink-2);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.25;padding:4px 2px}
.seg button small{font-family:var(--mono);font-size:10.5px;color:var(--muted)}
.seg button.is-active{background:#fff;color:var(--ink);font-weight:700;box-shadow:0 1px 3px rgba(0,0,0,.08)}

.result{display:grid;grid-template-columns:150px minmax(0,1fr);gap:28px;padding:28px 30px;align-items:center;background:radial-gradient(circle at 15% 90%,var(--accent-soft),transparent 55%)}

/* 저금병 */
.jar-area{display:flex;flex-direction:column;align-items:center;gap:12px}
.jar{width:130px;display:flex;flex-direction:column;align-items:center}
.jar-lid{width:78px;height:16px;border-radius:6px 6px 3px 3px;background:var(--principal);margin-bottom:-2px;position:relative;z-index:2}
.jar-lid::after{content:"";position:absolute;left:50%;top:5px;width:30px;height:4px;margin-left:-15px;border-radius:2px;background:var(--coin)}
.jar-body{position:relative;width:130px;height:200px;border:3px solid var(--principal);border-radius:26px 26px 34px 34px;overflow:hidden;background:#fff}
.jar-fill{position:absolute;left:0;right:0;bottom:0;display:flex;flex-direction:column;transition:height .6s cubic-bezier(.2,.8,.2,1)}
.jar-interest{background:repeating-linear-gradient(-45deg,var(--coin) 0 8px,#ffd56b 8px 16px);transition:height .6s cubic-bezier(.2,.8,.2,1);position:relative}
.jar-interest::before{content:"";position:absolute;left:-10%;right:-10%;top:-6px;height:12px;border-radius:50%;background:#ffd56b}
.jar-principal{background:var(--principal);transition:height .6s cubic-bezier(.2,.8,.2,1)}
.jar-shine{position:absolute;left:14px;top:18px;width:12px;height:110px;border-radius:999px;background:rgba(255,255,255,.35);pointer-events:none}
.jar-legend{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--sub)}
.lg{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.lg--i{background:var(--coin)} .lg--p{background:var(--principal)}

.result-text{min-width:0}
.big{font-family:var(--mono);font-size:54px;font-weight:500;letter-spacing:-.04em;line-height:1.1;margin-top:8px;word-break:break-all}
.big small{font-family:var(--font);font-size:18px;letter-spacing:0;margin-left:4px;color:var(--ink-2)}
.sub{margin:6px 0 16px;font-size:14px;color:var(--ink-2)}
.rows{margin:0;border-top:1px solid var(--line)}
.rows div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line-2);font-size:14px}
.rows dt{color:var(--ink-2)}
.rows dt small{font-family:var(--mono);font-size:11px;color:var(--muted);margin-left:4px}
.rows dd{margin:0;font-family:var(--mono);white-space:nowrap}
.rows dd.neg{color:#c2410c}
.rows .rows-strong{border-bottom:none}
.rows .rows-strong dt{font-weight:700;color:var(--ink)}
.rows .rows-strong dd{font-weight:500;color:var(--accent-deep);font-size:17px}
.eff{margin:10px 0 0;font-size:12.5px;color:var(--sub);line-height:1.6}
.eff b{font-family:var(--mono);color:var(--ink);font-weight:500}

/* ---------- 비교 ---------- */
.sec-title{font-size:16px;margin:0 0 12px}
.cmp-table-wrap{background:var(--panel);border:1px solid var(--line);border-radius:18px;overflow:hidden}
.cmp-table{width:100%;border-collapse:collapse;table-layout:fixed}
.cmp-table th,.cmp-table td{padding:14px 16px;text-align:right;border-bottom:1px solid var(--line-3)}
.cmp-table thead th{font-size:12px;font-weight:500;color:var(--sub);background:var(--panel-soft)}
.cmp-table thead th:first-child{width:90px}
.cmp-table tbody th{text-align:left;font-size:14px}
.cmp-table tbody tr:last-child th,.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table td b{display:block;font-family:var(--mono);font-weight:500;font-size:15px}
.cmp-table td small{font-size:11.5px;color:var(--muted)}
.cmp-table td.is-cur{background:var(--accent-soft);box-shadow:inset 0 0 0 2px var(--accent)}
.cmp-table td.is-cur b{color:var(--accent-deep)}
.note{margin:12px 0 0;font-size:12px;color:var(--muted);line-height:1.6}

@media (max-width:860px){
  .calc{grid-template-columns:minmax(0,1fr)}
  .form{border-right:none;border-bottom:1px solid var(--line)}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:20px 16px 40px;gap:16px}
  .kind{max-width:none}
  .form{padding:18px 16px}
  .result{grid-template-columns:minmax(0,1fr);padding:22px 16px;gap:18px}
  .jar-area{flex-direction:row;justify-content:center;gap:20px}
  .jar{width:100px}
  .jar-body{width:100px;height:150px}
  .jar-lid{width:60px}
  .big{font-size:38px}
  .cmp-table th,.cmp-table td{padding:10px 6px}
  .cmp-table thead th{font-size:11px}
  .cmp-table thead th:first-child{width:52px}
  .cmp-table td b{font-size:12px}
  .cmp-table td small{font-size:10px}
}
@media (prefers-reduced-motion:reduce){ *{transition:none !important} }

/* 다크 모드 (인쇄는 라이트 그대로) */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#16140f; --surface:#1b1914; --panel:#211e18; --panel-soft:#26231c;
    --ink:#efebe2; --ink-hover:#ffffff; --ink-2:#cdc7ba; --sub:#a59f92; --muted:#8e887b;
    --line:#332f27; --line-2:#3e392f; --line-3:#2a2720; --hover:#2d2a22; --soft:#2a2720; --track:#383328;
    --accent:#f0a520; --accent-deep:#ffc34d; --accent-soft:rgba(240,165,32,.14);
    --principal:#9a7650;
  }
  :root[data-theme="dark"] .chip{background:var(--surface)}
  :root[data-theme="dark"] .seg button.is-active{background:var(--track);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .kind-tab[aria-selected="true"]{box-shadow:0 6px 18px rgba(0,0,0,.3)}
  :root[data-theme="dark"] .jar-body{background:var(--surface)}
  :root[data-theme="dark"] .jar-shine{background:rgba(255,255,255,.1)}
  :root[data-theme="dark"] .rows dd.neg{color:#ff8a5c}
}