/* 홈와트 — 공통 스타일 */
:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1a202c;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --accent-dark: #115e59;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --danger: #b91c1c;
  --danger-soft: #fee2e2;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 18px; }

/* 헤더 */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}
.logo {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--accent-dark);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo .watt { color: var(--accent); }
.gnb { display: flex; gap: 14px; }
.gnb a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
}
.gnb a:hover { color: var(--accent-dark); }

/* 본문 */
main { padding: 28px 0 48px; }
h1 { font-size: 1.5rem; letter-spacing: -0.02em; margin: 0 0 6px; }
.subtitle { color: var(--muted); margin: 0 0 24px; font-size: 0.95rem; }
h2 { font-size: 1.15rem; margin: 36px 0 12px; letter-spacing: -0.01em; }
h3 { font-size: 1rem; margin: 24px 0 8px; }
p { margin: 10px 0; }
small, .fineprint { color: var(--muted); font-size: 0.8rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin: 16px 0;
}

/* 폼 */
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 6px;
}
.field .hint { font-weight: 400; color: var(--muted); font-size: 0.8rem; margin-left: 4px; }
input[type="number"], select {
  width: 100%;
  padding: 11px 12px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
input[type="number"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
.field-row { display: flex; gap: 12px; }
.field-row .field { flex: 1; }

/* 토글형 라디오 */
.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.seg input[type="radio"] { display: none; }
.seg label {
  padding: 9px 14px;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  background: #fff;
  margin: 0;
}
.seg input[type="radio"]:checked + label {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 800;
  font-family: inherit;
  cursor: pointer;
  margin-top: 6px;
}
.btn:hover { background: var(--accent-dark); }

/* 결과 */
.result {
  display: none;
  background: var(--accent-soft);
  border: 1.5px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 18px;
}
.result.show { display: block; }
.result .big {
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--accent-dark);
  letter-spacing: -0.02em;
  margin: 2px 0;
}
.result .row {
  display: flex;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(15, 118, 110, 0.25);
  font-size: 0.92rem;
}
.result .row:last-child { border-bottom: none; }
.result .row b { font-weight: 800; }

.notice {
  background: var(--warn-soft);
  border-left: 4px solid var(--warn);
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin: 14px 0;
}
.notice.red { background: var(--danger-soft); border-left-color: var(--danger); }

/* 누진 구간 시각화 바 */
.tier-bar {
  display: flex;
  height: 34px;
  border-radius: 8px;
  overflow: hidden;
  margin: 12px 0 4px;
  border: 1px solid var(--line);
}
.tier-bar .seg1 { background: #99f6e4; }
.tier-bar .seg2 { background: #fcd34d; }
.tier-bar .seg3 { background: #fca5a5; }
.tier-bar > div {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: #334155;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
}
.tier-legend { display: flex; gap: 14px; font-size: 0.75rem; color: var(--muted); flex-wrap: wrap; }
.tier-legend i {
  display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 4px;
}

/* 표 */
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin: 12px 0; }
th, td { padding: 9px 10px; border: 1px solid var(--line); text-align: left; }
th { background: #f1f5f9; font-weight: 700; }
td.num, th.num { text-align: right; }

/* 도구 목록 (허브) */
.tool-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 20px 0; }
@media (min-width: 560px) { .tool-grid { grid-template-columns: 1fr 1fr; } }
.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}
.tool-card:hover { border-color: var(--accent); }
.tool-card .emoji { font-size: 1.6rem; }
.tool-card b { display: block; margin: 6px 0 4px; font-size: 1rem; }
.tool-card span { color: var(--muted); font-size: 0.84rem; }
.tool-card .badge {
  display: inline-block;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 6px;
}

/* 광고/제휴 슬롯 */
.ad-slot {
  min-height: 90px;
  border: 1.5px dashed var(--line);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #cbd5e1;
  font-size: 0.75rem;
  margin: 22px 0;
}
.partner-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 18px 0;
}
.partner-box b { font-size: 0.95rem; }
.partner-box ul { margin: 8px 0 4px; padding-left: 18px; font-size: 0.9rem; }
.partner-box .disclosure { color: var(--muted); font-size: 0.72rem; margin-top: 8px; }

/* FAQ */
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 4px 16px;
  margin: 8px 0;
}
.faq summary { font-weight: 700; cursor: pointer; padding: 10px 0; font-size: 0.95rem; }
.faq details p { font-size: 0.9rem; color: #334155; }

/* 푸터 */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 26px 0 34px;
  font-size: 0.8rem;
  color: var(--muted);
}
.site-footer nav { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; }
.site-footer a { color: var(--muted); text-decoration: none; font-weight: 600; }
.site-footer a:hover { color: var(--accent-dark); }

@media (max-width: 480px) {
  h1 { font-size: 1.3rem; }
  .gnb { display: none; }
}