:root {
  --bg: #f2f3f5;
  --card: #ffffff;
  --ink: #111418;
  --sub: #4a5260;
  --line: #d9dde3;
  --blue: #1f5eff;
  --blue-soft: #e8efff;
  --warn: #c2410c;
  --warn-soft: #fff1e8;
  --good: #11804a;
  --good-soft: #e7f6ee;
  --radius: 16px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a; --card: #1e2127; --ink: #f1f3f6; --sub: #b4bac4; --line: #343944;
    --blue: #6e9bff; --blue-soft: #1f2a44; --warn: #ff9b62; --warn-soft: #3a261b;
    --good: #5fd39a; --good-soft: #17322a;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a; --card: #1e2127; --ink: #f1f3f6; --sub: #b4bac4; --line: #343944;
  --blue: #6e9bff; --blue-soft: #1f2a44; --warn: #ff9b62; --warn-soft: #3a261b;
  --good: #5fd39a; --good-soft: #17322a;
}

* { box-sizing: border-box; }
html { font-size: 19px; -webkit-text-size-adjust: 100%; }
@media (min-width: 640px) { html { font-size: 20px; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.6; word-break: keep-all; overflow-wrap: anywhere;
}
a { color: var(--blue); }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }

.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; height: 56px; }
.brand { font-weight: 800; font-size: 1.05rem; color: var(--ink); text-decoration: none; }
.brand b { color: var(--blue); }

h1 { font-size: 1.75rem; line-height: 1.3; margin: 28px 0 6px; font-weight: 900; letter-spacing: -0.02em; }
.lead { color: var(--sub); margin: 0 0 20px; }
h2 { font-size: 1.25rem; margin: 0 0 12px; font-weight: 800; }
h3 { font-size: 1.05rem; margin: 20px 0 6px; font-weight: 800; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 0 0 16px; }

/* 입력 */
.field { margin: 0 0 22px; }
.field:last-child { margin-bottom: 0; }
.field > label, .field > .label { display: block; font-weight: 800; margin-bottom: 4px; }
.hint { display: block; color: var(--sub); font-size: 0.85rem; margin: 0 0 8px; }
.money { display: flex; align-items: center; gap: 10px; }
.money input {
  width: 100%; max-width: 260px; font: inherit; font-size: 1.35rem; font-weight: 800;
  padding: 12px 14px; border: 2px solid var(--line); border-radius: 12px; background: var(--card); color: var(--ink);
}
.money input:focus { outline: none; border-color: var(--blue); }
.money span { font-weight: 700; color: var(--sub); }
.seg { display: flex; flex-wrap: wrap; gap: 8px; }
.seg label {
  flex: 1 1 140px; display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 52px; padding: 8px 12px; border: 2px solid var(--line); border-radius: 12px;
  cursor: pointer; font-weight: 700; background: var(--card);
}
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) { border-color: var(--blue); background: var(--blue-soft); color: var(--blue); }
.seg label:has(input:focus-visible) { outline: 3px solid var(--blue); outline-offset: 2px; }
.sub-fields { border-left: 4px solid var(--blue-soft); padding-left: 14px; margin-top: 14px; }
[hidden] { display: none !important; }
details.more { margin-top: 6px; }
details.more summary { cursor: pointer; color: var(--blue); font-weight: 700; padding: 6px 0; }

/* 결과 */
.result { border: 3px solid var(--blue); }
.result .big-label { font-weight: 800; color: var(--sub); margin: 0; }
.result .big { font-size: 2.3rem; font-weight: 900; line-height: 1.2; margin: 4px 0 16px; letter-spacing: -0.02em; }
.result .big small { font-size: 1.1rem; font-weight: 700; color: var(--sub); }
.rows { list-style: none; margin: 0; padding: 0; }
.rows li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; padding: 12px 0; border-top: 1px dashed var(--line); }
.rows li > span:first-child { flex: 1 0 8em; }
.rows li > span:last-child { font-weight: 800; text-align: right; margin-left: auto; }
.nw { white-space: nowrap; }
.rows li.minus span:last-child { color: var(--warn); }
.rows li.plus span:last-child { color: var(--good); }
.rows li.total { border-top: 2px solid var(--ink); font-size: 1.1rem; }
.rows small { display: block; color: var(--sub); font-weight: 500; font-size: 0.8rem; }

.note { border-radius: 12px; padding: 14px 16px; margin: 12px 0 0; }
.note.warn { background: var(--warn-soft); }
.note.good { background: var(--good-soft); }
.note.info { background: var(--blue-soft); }
.note strong { display: block; margin-bottom: 2px; }

/* 안내 글 */
.guide p, .guide li { color: var(--ink); }
.guide ul { padding-left: 1.2em; }
table.t { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin: 8px 0 4px; }
table.t th, table.t td { border-bottom: 1px solid var(--line); padding: 8px 6px; text-align: left; }
table.t td:last-child, table.t th:last-child { text-align: right; }

/* 홈 */
.tools { display: grid; gap: 12px; }
.tool { display: block; text-decoration: none; color: var(--ink); background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.tool:hover { border-color: var(--blue); }
.tool b { font-size: 1.15rem; display: block; }
.tool span { color: var(--sub); font-size: 0.9rem; }
.tool.soon { opacity: 0.55; pointer-events: none; }
.badge { display: inline-block; font-size: 0.75rem; font-weight: 800; padding: 2px 8px; border-radius: 99px; background: var(--blue-soft); color: var(--blue); margin-left: 6px; vertical-align: middle; }

footer { color: var(--sub); font-size: 0.8rem; padding: 24px 0 48px; }
footer p { margin: 0 0 6px; }
.disclaimer { margin: 0 0 16px; }
.fine { color: var(--sub); font-size: 0.8rem; margin: 14px 0 0; }