@charset "utf-8";

/* ==========================================================================
   우리집 전기요금 (happyharus.com)
   주택용 전기요금 계산기 · 텍스트 중심, 이미지 미사용
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7f6;
  --bg-sunken: #eaeeec;
  --line: #dee4e1;
  --line-strong: #c3ccc8;
  --text: #1a201d;
  --text-soft: #566159;
  --text-faint: #838f88;
  --accent: #17705a;
  --accent-soft: #e7f2ee;
  --accent-line: #b3d6cb;
  --warn: #a8511b;
  --warn-soft: #fdf1e7;
  --warn-line: #f0cfb2;
  --radius: 10px;
  --maxw: 1000px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141816;
    --bg-soft: #1b201e;
    --bg-sunken: #232a27;
    --line: #2d3532;
    --line-strong: #3e4844;
    --text: #e7ebe9;
    --text-soft: #a6b0ab;
    --text-faint: #7a857f;
    --accent: #5cbfa2;
    --accent-soft: #172722;
    --accent-line: #2b4840;
    --warn: #e0a074;
    --warn-soft: #2b1f16;
    --warn-line: #503524;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
    "Malgun Gothic", "맑은 고딕", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  word-break: keep-all;
  overflow-wrap: break-word;
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus {
  left: 12px; top: 12px; z-index: 100;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: var(--radius);
}

/* ------------------------------------------------------------- 헤더/푸터 */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky; top: 0; z-index: 30;
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 62px; flex-wrap: wrap;
}

.brand {
  color: var(--text); font-weight: 700; font-size: 1.12rem;
  letter-spacing: -0.02em; padding: 12px 0;
}
.brand:hover { text-decoration: none; }
.brand span { color: var(--accent); }

.site-nav ul {
  display: flex; align-items: center; gap: 4px;
  list-style: none; margin: 0; padding: 0 0 12px; flex-wrap: wrap;
}
.site-nav a {
  display: block; padding: 7px 12px; border-radius: var(--radius);
  color: var(--text-soft); font-size: 0.94rem; font-weight: 500;
}
.site-nav a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.site-nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

@media (min-width: 641px) { .site-nav ul { padding-bottom: 0; } }

.site-footer {
  border-top: 1px solid var(--line); background: var(--bg-soft);
  padding: 32px 0; font-size: 0.9rem; color: var(--text-soft);
}
.footer-nav ul {
  display: flex; gap: 6px 20px; flex-wrap: wrap;
  list-style: none; margin: 0 0 16px; padding: 0;
}
.footer-nav a { color: var(--text-soft); }
.footer-nav a:hover { color: var(--accent); }
.site-footer p { margin: 0 0 8px; max-width: 70ch; }
.disclaimer {
  font-size: 0.85rem; color: var(--text-faint);
  border-top: 1px solid var(--line); padding-top: 16px; margin-top: 16px;
}

/* ------------------------------------------------------------- 본문 공통 */

main { display: block; padding: 34px 0 64px; }

.page-head { margin: 0 0 26px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.page-head h1 { margin: 0 0 10px; font-size: 1.74rem; line-height: 1.35; letter-spacing: -0.025em; }
.page-head p { margin: 0; color: var(--text-soft); max-width: 62ch; }

.breadcrumb { margin: 0 0 14px; font-size: 0.86rem; color: var(--text-faint); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "›"; margin-right: 6px; color: var(--line-strong); }

h2 { font-size: 1.3rem; letter-spacing: -0.02em; margin: 2.2em 0 0.7em; line-height: 1.4; }
h3 { font-size: 1.06rem; letter-spacing: -0.015em; margin: 1.8em 0 0.6em; line-height: 1.5; }
p { margin: 0 0 1.05em; }
ul, ol { margin: 0 0 1.05em; padding-left: 1.35em; }
li { margin-bottom: 0.4em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }

.note {
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  background: var(--bg-soft); border-radius: var(--radius);
  padding: 16px 18px; margin: 1.6em 0; font-size: 0.95rem;
}
.note :last-child { margin-bottom: 0; }
.note > strong:first-child { display: block; margin-bottom: 4px; }
.note.caution { border-left-color: var(--warn); background: var(--warn-soft); }

.table-scroll {
  overflow-x: auto; margin: 1.4em 0;
  border: 1px solid var(--line); border-radius: var(--radius);
}
table { border-collapse: collapse; width: 100%; min-width: 420px; font-size: 0.94rem; }
caption {
  text-align: left; padding: 12px 14px; color: var(--text-soft); font-size: 0.88rem;
  border-bottom: 1px solid var(--line); background: var(--bg-soft);
}
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--bg-soft); font-weight: 600; font-size: 0.88rem; color: var(--text-soft); white-space: nowrap; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ------------------------------------------------------------- 계산기 */

.calc {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-soft); padding: 20px; margin-bottom: 24px;
}

.calc-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }

.field { display: flex; flex-direction: column; gap: 5px; flex: 1 1 200px; min-width: 0; }
.field label { font-size: 0.86rem; font-weight: 600; color: var(--text-soft); }
.field .hint { font-size: 0.8rem; color: var(--text-faint); font-weight: 400; }

input[type="number"], input[type="text"], select {
  width: 100%; font: inherit; font-size: 1rem; color: var(--text);
  background: var(--bg); border: 1px solid var(--line-strong);
  border-radius: var(--radius); padding: 10px 12px;
}
input:focus, select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}

.calc-presets { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 14px; align-items: center; }
.calc-presets .label { font-size: 0.84rem; color: var(--text-faint); margin-right: 2px; }
.preset {
  font: inherit; font-size: 0.88rem; cursor: pointer;
  border: 1px solid var(--line-strong); background: var(--bg); color: var(--text-soft);
  border-radius: 999px; padding: 5px 13px;
}
.preset:hover { border-color: var(--accent-line); color: var(--text); }

/* 결과 */

.result { border: 1px solid var(--accent-line); border-radius: var(--radius); overflow: hidden; }

.result-head {
  background: var(--accent-soft); padding: 20px;
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.result-head .label { font-size: 0.92rem; color: var(--text-soft); }
.result-amount {
  font-size: 2.1rem; font-weight: 700; letter-spacing: -0.03em;
  color: var(--accent); font-variant-numeric: tabular-nums;
}
.result-sub { font-size: 0.88rem; color: var(--text-soft); }

.result-body { padding: 4px 20px 18px; background: var(--bg); }

.breakdown { width: 100%; border-collapse: collapse; font-size: 0.93rem; min-width: 0; }
.breakdown th, .breakdown td { padding: 9px 0; border-bottom: 1px solid var(--line); }
.breakdown th { text-align: left; font-weight: 500; color: var(--text-soft); }
.breakdown td { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.breakdown tr.sum th, .breakdown tr.sum td { font-weight: 700; color: var(--text); border-bottom: 2px solid var(--line-strong); }
.breakdown tr.total th, .breakdown tr.total td { font-weight: 700; font-size: 1.05rem; border-bottom: 0; padding-top: 13px; }
.breakdown .detail { font-size: 0.85rem; color: var(--text-faint); font-weight: 400; display: block; }

.tier-list { list-style: none; margin: 0; padding: 0; font-size: 0.88rem; color: var(--text-soft); }
.tier-list li { display: flex; justify-content: space-between; gap: 10px; margin: 0 0 2px; }
.tier-list .amt { font-variant-numeric: tabular-nums; white-space: nowrap; }

.cliff {
  margin-top: 14px; border: 1px solid var(--warn-line); background: var(--warn-soft);
  border-radius: var(--radius); padding: 13px 16px; font-size: 0.92rem; color: var(--text);
}
.cliff strong { color: var(--warn); }

/* ------------------------------------------------------------- 글 */

.article { max-width: 720px; }
.article-meta {
  font-size: 0.88rem; color: var(--text-faint);
  margin: 0 0 24px; padding-bottom: 18px; border-bottom: 1px solid var(--line);
}

.card-grid {
  list-style: none; margin: 0; padding: 0; display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 17px 18px; background: var(--bg); margin: 0;
}
.card h3 { margin: 0 0 7px; font-size: 1.02rem; }
.card p { margin: 0; font-size: 0.93rem; color: var(--text-soft); }
.card-date { display: block; margin-top: 10px; font-size: 0.84rem; color: var(--text-faint); }

/* ------------------------------------------------------------- 반응형 */

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .page-head h1 { font-size: 1.42rem; }
  main { padding: 26px 0 52px; }
  .calc { padding: 16px; }
  .result-head { padding: 16px; }
  .result-body { padding: 4px 16px 16px; }
  .result-amount { font-size: 1.8rem; }
}