:root {
  --bg: #fbf7f0;
  --surface: #ffffff;
  --ink: #2b2622;
  --muted: #6d645b;
  --line: #e4dbcf;
  --accent: #a5481f;
  --accent-soft: #f6e7dc;
  --warn: #8a4b00;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", "Noto Sans CJK KR", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
.top, main, .foot { max-width: 860px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
.top { padding-top: 28px; padding-bottom: 16px; }
.top h1 { margin: 0 0 4px; font-size: 1.6rem; line-height: 1.3; letter-spacing: -0.01em; }
.top p { margin: 0; color: var(--muted); }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.pans { display: grid; grid-template-columns: 1fr 1fr; }
.pan { min-width: 0; margin: 0; padding: 16px; border: 0; }
.pan + .pan { border-left: 1px solid var(--line); }
legend { float: left; width: 100%; padding: 0; margin-bottom: 10px; font-weight: 700; font-size: 1.05rem; }
legend + * { clear: both; }
.field { margin-bottom: 10px; min-width: 0; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
[hidden] { display: none !important; }
label { display: block; margin-bottom: 3px; color: var(--muted); font-size: 0.875rem; }
input, select, textarea {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid #c9bdae;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
textarea { resize: vertical; line-height: 1.7; }

.result { padding: 16px; background: var(--accent-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.result-main { margin: 0; font-size: 1.5rem; font-weight: 800; line-height: 1.3; color: var(--accent); }
.result-sub { margin: 2px 0 0; color: var(--muted); font-size: 0.9rem; }
.result-warn { margin: 8px 0 0; color: var(--warn); font-size: 0.9rem; }
.result.empty .result-main { color: var(--muted); font-size: 1.2rem; }

.recipe { display: grid; grid-template-columns: 1fr 1fr; }
.recipe-in, .recipe-out { min-width: 0; padding: 16px; }
.recipe-out { border-left: 1px solid var(--line); }
.recipe-out-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 6px; }
.recipe-out h2 { margin: 0; font-size: 1rem; }
button.ghost {
  min-height: 36px;
  padding: 4px 14px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
}
button.ghost:disabled { opacity: 0.45; cursor: default; }

table { width: 100%; border-collapse: collapse; }
th { text-align: left; color: var(--muted); font-size: 0.8rem; font-weight: 600; padding: 4px 0; border-bottom: 1px solid var(--line); }
td { padding: 7px 0; border-bottom: 1px solid #f0e9df; vertical-align: top; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; padding-left: 12px; }
td.num { font-weight: 700; }
td.same { color: var(--muted); font-weight: 400; }
.note { display: block; color: var(--muted); font-size: 0.8rem; }

.guide { padding: 28px 0 8px; }
.guide h2 { margin: 28px 0 8px; font-size: 1.25rem; line-height: 1.35; }
.guide h2:first-child { margin-top: 0; }
.guide h3 { margin: 18px 0 2px; font-size: 1rem; }
.guide p { margin: 6px 0; max-width: 42rem; }
.formula { padding: 10px 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; font-weight: 700; }
.table-wrap { max-width: 34rem; margin: 10px 0; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 6px 14px; }
.sizes td:first-child { font-weight: 700; }
.sizes tr:last-child td { border-bottom: 0; }
.muted { color: var(--muted); font-size: 0.9rem; }

.foot { padding-top: 12px; padding-bottom: 32px; color: var(--muted); font-size: 0.85rem; }
.foot p { margin: 4px 0; }
.foot a { color: var(--accent); }

.policy { padding-bottom: 8px; }
.policy h2 { margin: 22px 0 4px; font-size: 1.1rem; }
.policy p { margin: 4px 0; max-width: 42rem; }

@media (max-width: 640px) {
  .top h1 { font-size: 1.35rem; }
  .pans, .recipe { grid-template-columns: 1fr; }
  .pan + .pan { border-left: 0; border-top: 1px solid var(--line); }
  .recipe-out { border-left: 0; border-top: 1px solid var(--line); }
  .result-main { font-size: 1.35rem; }
}

/* 여러 계산기 공통 */
.site { max-width: 860px; margin: 0 auto; padding: 12px 16px 0; }
.site a { color: var(--accent); font-size: 0.9rem; font-weight: 700; text-decoration: none; }
.single { padding: 16px; }
.summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 0; }
.summary div { min-width: 0; }
.summary dt { color: var(--muted); font-size: 0.8rem; }
.summary dd { margin: 0; font-size: 1.25rem; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.flag { color: var(--muted); font-size: 0.75rem; font-weight: 400; margin-left: 4px; }
.hint { margin: 6px 0 0; color: var(--muted); font-size: 0.85rem; }
.problem { margin: 10px 0 0; color: var(--warn); font-size: 0.9rem; }
.tools { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0; padding: 0; list-style: none; }
.tools a { display: block; height: 100%; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; color: inherit; text-decoration: none; }
.tools a:hover { border-color: var(--accent); }
.tools strong { display: block; color: var(--accent); font-size: 1.05rem; margin-bottom: 2px; }
.tools span { color: var(--muted); font-size: 0.9rem; }
.triple { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
@media (max-width: 640px) {
  .tools { grid-template-columns: 1fr; }
  .summary dd { font-size: 1.1rem; }
}
.group { margin: 12px 0 10px; font-size: 1.1rem; }