/* ===== 베이비 계산기 — 디자인 토큰 ===== */
:root {
  --bg: #171320;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #241c33 0%, #171320 55%);
  --panel-bg: #1e1829;
  --panel-bg-2: #1a1524;
  --input-bg: #150f1e;
  --border: #322a45;
  --border-soft: #261f36;
  --text: #f1ecfa;
  --text-muted: #b7abd1;
  --text-dim: #7c6f96;
  --accent: #9b8cf0;          /* 라벤더 */
  --accent-strong: #b3a6ff;
  --accent-contrast: #17102c;
  --brand: #5ec9a3;           /* 민트 포인트 */
  --profit: #5ec9a3;          /* 좋음/정상 */
  --profit-bg: #16281f;
  --loss: #ff7a94;            /* 주의 */
  --loss-bg: #2c1620;
  --chip-bg: #251e34;
  --shadow: 0 18px 50px rgba(0,0,0,.45);
  --radius: 16px;
  --radius-sm: 10px;
}
:root[data-theme="light"] {
  --bg: #f6f3fc;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #ffffff 0%, #f6f3fc 55%);
  --panel-bg: #ffffff;
  --panel-bg-2: #faf8fe;
  --input-bg: #f3effa;
  --border: #e2dbf1;
  --border-soft: #ede8f7;
  --text: #251f33;
  --text-muted: #6c6182;
  --text-dim: #9c92b0;
  --accent: #8065e0;
  --accent-strong: #6f52d6;
  --accent-contrast: #ffffff;
  --brand: #229672;
  --profit: #1f9d75;
  --profit-bg: #e3f6ee;
  --loss: #d8395e;
  --loss-bg: #fbe7ec;
  --chip-bg: #f0eaf9;
  --shadow: 0 12px 34px rgba(60,40,90,.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== 광고 레일 (승인 후 코드 삽입) ===== */
.ad-rail {
  display: none;
  position: fixed;
  top: 90px;
  width: 160px;
  min-height: 600px;
}
.ad-rail-left { left: 12px; }
.ad-rail-right { right: 12px; }
@media (min-width: 1400px) { .ad-rail { display: block; } }

/* ===== 레이아웃 ===== */
.app { max-width: 880px; margin: 0 auto; padding: 0 18px 80px; }

header.site {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0 12px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.brand .logo { width: 30px; height: 30px; }
.theme-toggle {
  background: var(--chip-bg); color: var(--text); border: 1px solid var(--border);
  width: 40px; height: 40px; border-radius: 10px; cursor: pointer; font-size: 17px;
  transition: .15s;
}
.theme-toggle:hover { border-color: var(--accent); }

.sibling-nav {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center;
  margin: 4px 0 0;
}
.sibling-nav-link {
  border: 1px solid var(--border); background: var(--chip-bg); color: var(--text-muted);
  padding: 7px 13px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
  text-decoration: none; transition: .15s;
}
.sibling-nav-link:hover { border-color: var(--accent); color: var(--accent-strong); }

.hero { text-align: center; padding: 14px 0 22px; }
.hero h1 { font-size: clamp(26px, 5vw, 38px); line-height: 1.25; margin: 0 0 10px; letter-spacing: -.03em; }
.hero h1 .hl { color: var(--accent); }
.hero p { color: var(--text-muted); margin: 0 auto; max-width: 560px; font-size: 15.5px; }

/* ===== 탭 ===== */
.tabs {
  display: flex; flex-direction: column; gap: 16px;
  margin: 6px 0 24px; padding: 16px; border-radius: var(--radius);
  background: var(--panel-bg-2); border: 1px solid var(--border-soft);
}
.tab-search { margin-bottom: 4px; }
.tab-search input { padding: 12px 16px; }
.tab-empty { text-align: center; color: var(--text-dim); font-size: 13.5px; padding: 10px 0 2px; margin: 0; }
.tab-group { display: flex; flex-direction: column; gap: 9px; }
.tab-group-label {
  font-size: 12px; font-weight: 800; color: var(--text-dim);
  letter-spacing: .04em; text-align: center; text-transform: uppercase;
}
.tab-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.tab {
  border: 1px solid var(--border); background: var(--panel-bg); color: var(--text-muted);
  padding: 11px 16px; border-radius: 999px; cursor: pointer; font-size: 14.5px; font-weight: 600;
  transition: .15s; display: inline-flex; align-items: center; gap: 7px; text-decoration: none;
}
.tab:hover { color: var(--text); border-color: var(--accent); }
.tab.active {
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  color: var(--accent-contrast); border-color: transparent; box-shadow: 0 6px 18px rgba(155,140,240,.28);
}

/* ===== 패널 ===== */
.panel {
  background: linear-gradient(180deg, var(--panel-bg), var(--panel-bg-2));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.panel.hidden { display: none; }
.panel h2 { margin: 0 0 4px; font-size: 21px; letter-spacing: -.02em; }
.panel .sub { color: var(--text-muted); font-size: 14px; margin: 0 0 20px; }

/* ===== 입력 ===== */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; color: var(--text-muted); font-weight: 600; }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap .unit {
  position: absolute; right: 12px; color: var(--text-dim); font-size: 13px; pointer-events: none;
}
input[type="number"], input[type="text"], input[type="date"], select {
  width: 100%; background: var(--input-bg); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius-sm); padding: 12px 40px 12px 13px;
  font-size: 16px; font-variant-numeric: tabular-nums; transition: .15s;
  -moz-appearance: textfield;
}
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(155,140,240,.18); }
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
select { padding-right: 13px; cursor: pointer; }

.date-triple { display: flex; gap: 6px; }
.date-triple select { flex: 1; min-width: 0; padding: 12px 8px; text-align: center; }

.seg { display: flex; gap: 6px; background: var(--input-bg); padding: 4px; border-radius: 10px; border: 1px solid var(--border); flex-wrap: wrap; }
.seg button {
  flex: 1; border: none; background: transparent; color: var(--text-muted);
  padding: 8px; border-radius: 7px; cursor: pointer; font-size: 13.5px; font-weight: 600; transition: .12s;
  min-width: 80px;
}
.seg button.active { background: var(--brand); color: #fff; }

.actions { display: flex; gap: 10px; margin-top: 20px; }
.btn {
  flex: 1; border: none; border-radius: var(--radius-sm); padding: 14px; font-size: 15px; font-weight: 700;
  cursor: pointer; transition: .15s;
}
.btn-primary { background: linear-gradient(180deg, var(--accent-strong), var(--accent)); color: var(--accent-contrast); }
.btn-primary:hover { filter: brightness(1.05); transform: translateY(-1px); }
.btn-ghost { flex: 0 0 auto; background: var(--chip-bg); color: var(--text-muted); border: 1px solid var(--border); padding: 14px 18px; }
.btn-ghost:hover { color: var(--text); }

/* ===== 결과 ===== */
.result { margin-top: 22px; border-top: 1px dashed var(--border); padding-top: 20px; }
.result-hero {
  text-align: center; padding: 18px; border-radius: var(--radius-sm); margin-bottom: 16px;
  background: var(--chip-bg); border: 1px solid var(--border-soft);
}
.result-hero .label { font-size: 13px; color: var(--text-muted); }
.result-hero .value { font-size: clamp(26px, 6vw, 34px); font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.result-hero.profit { background: var(--profit-bg); border-color: var(--profit); }
.result-hero.profit .value { color: var(--profit); }
.result-hero.loss { background: var(--loss-bg); border-color: var(--loss); }
.result-hero.loss .value { color: var(--loss); }

.rows { display: grid; gap: 1px; background: var(--border-soft); border: 1px solid var(--border-soft); border-radius: var(--radius-sm); overflow: hidden; }
.row {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 13px 15px; background: var(--panel-bg); font-size: 14.5px;
}
.row .k { color: var(--text-muted); }
.row .v { font-weight: 700; font-variant-numeric: tabular-nums; }
.row .v.profit { color: var(--profit); }
.row .v.loss { color: var(--loss); }
.row.total { background: var(--panel-bg-2); }
.row.total .v { font-size: 16px; }

.hint { font-size: 12.5px; color: var(--text-dim); margin-top: 14px; text-align: center; }

.share-wrap { margin-top: 18px; text-align: center; }
.share-wrap .share-btn { min-width: 180px; }

.related { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--border); }
.related-label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 9px; }
.related-links { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.related-link {
  border: 1px solid var(--border); background: var(--chip-bg); color: var(--text);
  padding: 9px 14px; border-radius: 999px; cursor: pointer; font-size: 13.5px; font-weight: 600;
  transition: .15s; display: inline-block; text-decoration: none;
}
.related-link:hover { border-color: var(--accent); color: var(--accent-strong); }
.err { color: var(--loss); font-size: 13.5px; margin-top: 12px; text-align: center; display: none; }
.err.show { display: block; }

/* ===== 설명(SEO) 콘텐츠 ===== */
.info { margin-top: 46px; }
.info h3 { font-size: 18px; margin: 30px 0 10px; letter-spacing: -.02em; }
.info p, .info li { color: var(--text-muted); font-size: 14.5px; }
.info .faq { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; margin-top: 12px; }
.info details { border-bottom: 1px solid var(--border-soft); background: var(--panel-bg); }
.info details:last-child { border-bottom: none; }
.info summary { padding: 14px 16px; cursor: pointer; font-weight: 600; color: var(--text); list-style: none; }
.info summary::-webkit-details-marker { display: none; }
.info summary::after { content: "+"; float: right; color: var(--accent); }
.info details[open] summary::after { content: "–"; }
.info details p { padding: 0 16px 14px; margin: 0; }

footer.site { text-align: center; color: var(--text-dim); font-size: 12.5px; padding: 40px 0 10px; }
footer.site a { color: var(--text-muted); text-decoration: none; }
footer.site a:hover { color: var(--accent); }
footer.site .sibling-sites { margin-top: 8px; }

/* ===== 반응형 ===== */
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .panel { padding: 20px 16px; }
}