:root {
  --bg: #f4f6f6; --surface: #fff; --ink: #17201f; --ink2: #51605e; --ink3: #6b7a78;
  --line: #dde3e2; --accent: #0f766e; --accent-ink: #0b5f58; --accent-soft: #e3f3f1; --warn: #9a5b00;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111716; --surface: #1a2221; --ink: #edf2f1; --ink2: #b0bdbb; --ink3: #92a09e;
    --line: #2f3a38; --accent: #2dd4bf; --accent-ink: #5eead4; --accent-soft: #143331; --warn: #f0b35a;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.65; font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif; word-break: keep-all; overflow-wrap: anywhere; }
a { color: var(--accent-ink); }
.inner { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .inner { display: flex; align-items: center; justify-content: space-between; min-height: 58px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; font-weight: 750; font-size: 18px; }
.brand svg { flex: none; }
.btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 8px; padding: 7px 12px; font: inherit; font-size: 14px; cursor: pointer; }
main { padding: 20px 0 36px; }
h1 { font-size: 25px; line-height: 1.3; margin: 0 0 4px; letter-spacing: 0; }
h2 { font-size: 19px; line-height: 1.4; margin: 30px 0 8px; letter-spacing: 0; }
h3 { font-size: 16px; margin: 18px 0 4px; }
.lead { color: var(--ink2); margin: 0 0 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin-top: 12px; }
.card h2 { margin: 0; font-size: 16px; }

.field { display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px; }
.field input, .field select, .bank-inputs input {
  width: 100%; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); font: inherit; min-height: 52px; padding: 8px 10px;
}
.field input { font-size: 25px; font-weight: 700; font-variant-numeric: tabular-nums; }
.field select { font-size: 16px; font-weight: 650; min-height: 46px; }
input:focus-visible, select:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.hint { color: var(--ink3); font-size: 13px; margin: 3px 2px 0; min-height: 21px; }
.swap-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; }
.swap-row::before, .swap-row::after { content: ""; height: 1px; background: var(--line); flex: 1; }
#swap { width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: var(--accent-soft); color: var(--accent-ink); cursor: pointer; display: grid; place-items: center; }
.pair-line { font-size: 14px; color: var(--ink2); margin: 12px 0 0; }
.rate-line { font-size: 19px; font-weight: 750; margin: 0; font-variant-numeric: tabular-nums; }
.status { color: var(--ink3); font-size: 13px; margin: 2px 0 0; }
.status.warn { color: var(--warn); }

#bank { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 10px; }
#bank summary { cursor: pointer; font-weight: 650; font-size: 15px; }
.bank-inputs { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; margin: 10px 0; }
.bank-inputs label { font-size: 13px; color: var(--ink2); }
.bank-inputs input { min-height: 42px; margin-top: 3px; }
#bank-out { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; margin: 0; font-size: 14px; }
#bank-out dt { color: var(--ink2); }
#bank-out dd { margin: 0; font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.small { font-size: 12.5px; color: var(--ink3); margin: 8px 0 0; }

#list { list-style: none; margin: 8px 0 0; padding: 0; }
#list li + li { border-top: 1px solid var(--line); }
#list button { width: 100%; display: grid; grid-template-columns: 68px minmax(0, 1fr) auto; gap: 8px; align-items: center; min-height: 46px; border: 0; background: none; color: var(--ink); font: inherit; text-align: left; cursor: pointer; padding: 4px; }
#list button:hover, #list button[aria-current] { background: var(--accent-soft); }
#list .code { font-weight: 750; font-size: 14px; }
#list .name { color: var(--ink2); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#list .val { font-weight: 650; font-variant-numeric: tabular-nums; }

.chart-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.seg { display: flex; gap: 4px; }
.seg button { min-width: 44px; min-height: 36px; border: 1px solid var(--line); background: none; color: var(--ink2); border-radius: 7px; font: inherit; font-size: 13px; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-ink); border-color: var(--accent); font-weight: 700; }
#chart { position: relative; min-height: 220px; margin-top: 10px; overflow: hidden; }
#chart svg { display: block; max-width: 100%; touch-action: pan-y; }
.chart-note { color: var(--ink3); text-align: center; padding: 86px 10px; margin: 0; font-size: 14px; }
.grid { stroke: var(--line); stroke-width: 1; }
.tick { fill: var(--ink3); font-size: 11px; font-variant-numeric: tabular-nums; }
.line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.dot { fill: var(--accent); stroke: var(--surface); stroke-width: 2; }
.cross { stroke: var(--ink3); stroke-width: 1; stroke-dasharray: 3 3; }
#chart-tip { position: absolute; top: 2px; background: var(--ink); color: var(--surface); font-size: 12px; font-weight: 600; border-radius: 6px; padding: 3px 8px; white-space: pre; pointer-events: none; font-variant-numeric: tabular-nums; }
#chart-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 8px; }
#chart-stats span { display: block; color: var(--ink3); font-size: 12px; }
#chart-stats strong { font-size: 15px; font-variant-numeric: tabular-nums; }
#chart-table { margin-top: 10px; font-size: 14px; }
#chart-table summary { cursor: pointer; color: var(--ink2); }
.table-wrap { max-height: 240px; overflow-y: auto; margin-top: 6px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: left; }
#chart-table td:last-child, #chart-table th:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.pairs { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; list-style: none; }
.pairs a { display: block; border: 1px solid var(--line); background: var(--surface); border-radius: 7px; padding: 6px 11px; text-decoration: none; font-size: 14px; }
.ad-slot { margin: 18px 0; min-height: 90px; }
.ad-slot.preview { border: 2px dashed var(--line); display: grid; place-items: center; color: var(--ink3); }
.ad-label { display: block; font-size: 11px; color: var(--ink3); }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); font-size: 13px; color: var(--ink2); padding: 16px 0 24px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.site-footer p { margin: 0 0 8px; }
@media (max-width: 440px) {
  .field input { font-size: 22px; }
}