/*
Theme Name: 카스테라
Theme URI: https://carstera.com
Author: 카스테라
Description: 자동차 생활 데이터 서비스 카스테라 전용 커스텀 테마. 전국 주유소 유가·전기차 충전소·자동차검사 데이터 페이지에 최적화된 클래식 테마.
Version: 0.1.0
Requires PHP: 8.3
License: GNU General Public License v2 or later
Text Domain: carstera
*/

/* ==========================================================================
   1. 디자인 토큰 (CSS 변수)
   ========================================================================== */
:root {
  /* 색상 */
  --c-bg: #f5f6f8;
  --c-surface: #ffffff;
  --c-text: #1b1f27;
  --c-text-muted: #5b6472;
  --c-border: #e3e7ec;
  --c-primary: #1b5fd8;
  --c-primary-dark: #14459e;
  --c-primary-soft: #eaf1fd;
  --c-accent: #f59e0b;
  --c-accent-soft: #fef3e0;
  --c-success: #0f9d58;
  --c-danger: #d93025;

  /* 연료 구분색 */
  --fuel-gasoline: #e07b00;
  --fuel-premium: #c2410c;
  --fuel-diesel: #0f766e;
  --fuel-lpg: #6d28d9;
  --fuel-ev: #0284c7;

  /* 타이포그래피 — 시스템 폰트 스택 (웹폰트 금지) */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto,
    "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --font-num: "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  /* 크기 */
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(27, 31, 39, 0.08), 0 4px 14px rgba(27, 31, 39, 0.06);
  --container: 1080px;
  --header-h: 56px;
}

/* ==========================================================================
   2. 리셋·베이스
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  word-break: keep-all;
}
img { max-width: 100%; height: auto; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 0.6em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
table { border-collapse: collapse; width: 100%; }
button { font-family: inherit; }

.screen-reader-text {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0);
}
.skip-link:focus {
  position: fixed; top: 8px; left: 8px; z-index: 999;
  width: auto; height: auto; clip: auto;
  background: var(--c-surface); padding: 10px 16px; border-radius: var(--radius-sm);
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 16px; }

/* ==========================================================================
   3. 헤더·내비게이션 (모바일 퍼스트)
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h);
}
.site-logo {
  font-size: 1.25rem; font-weight: 800; color: var(--c-text);
  display: flex; align-items: center; gap: 6px;
}
.site-logo:hover { text-decoration: none; }
.site-logo .logo-mark { color: var(--c-accent); }

.nav-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: none; border: 0; cursor: pointer;
  color: var(--c-text);
}
.nav-toggle svg { width: 24px; height: 24px; }

.site-nav {
  display: none;
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow);
}
.site-nav.is-open { display: block; }
.site-nav ul { list-style: none; margin: 0; padding: 8px 0; }
.site-nav a {
  display: block; padding: 12px 20px;
  color: var(--c-text); font-weight: 600;
  min-height: 44px;
}
.site-nav a:hover { background: var(--c-primary-soft); text-decoration: none; }

@media (min-width: 960px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: block; position: static;
    background: none; border: 0; box-shadow: none;
  }
  .site-nav ul { display: flex; gap: 4px; padding: 0; }
  .site-nav a { padding: 8px 12px; border-radius: var(--radius-sm); font-size: 0.95rem; }
}

/* ==========================================================================
   4. 히어로 + 검색 도구 (프론트 최상단)
   ========================================================================== */
.hero {
  background: linear-gradient(160deg, var(--c-primary-dark), var(--c-primary));
  color: #fff;
  padding: 36px 0 48px;
}
.hero h1 { font-size: 1.5rem; margin-bottom: 4px; }
.hero .hero-sub { color: rgba(255, 255, 255, 0.85); margin-bottom: 20px; font-size: 0.95rem; }

.search-tool {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  color: var(--c-text);
}
.search-tool .fields { display: grid; gap: 10px; }
.search-tool label { font-size: 0.85rem; font-weight: 700; color: var(--c-text-muted); display: block; margin-bottom: 4px; }
.search-tool select {
  width: 100%; min-height: 44px;
  padding: 8px 12px;
  font-size: 1rem; font-family: inherit;
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  background: var(--c-surface); color: var(--c-text);
}
.search-tool select:focus { outline: 2px solid var(--c-primary); outline-offset: -1px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 10px 20px;
  font-size: 1rem; font-weight: 700;
  border: 0; border-radius: var(--radius-sm);
  background: var(--c-primary); color: #fff;
  cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--c-primary-dark); text-decoration: none; color: #fff; }
.btn-block { width: 100%; }
.btn-ghost { background: var(--c-primary-soft); color: var(--c-primary); }
.btn-ghost:hover { background: #dbe8fb; color: var(--c-primary-dark); }

@media (min-width: 640px) {
  .hero h1 { font-size: 1.9rem; }
  .search-tool { padding: 20px; }
  .search-tool .fields { grid-template-columns: 1fr 1fr 1fr auto; align-items: end; }
  .search-tool .btn { min-width: 120px; }
}

/* ==========================================================================
   5. 카드·섹션
   ========================================================================== */
.section { padding: 32px 0; }
.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.section-title h2 { margin: 0; }
.section-title .more { font-size: 0.9rem; white-space: nowrap; }

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
}
.card-grid { display: grid; gap: 12px; }
@media (min-width: 640px) { .card-grid.cols-2 { grid-template-columns: 1fr 1fr; } .card-grid.cols-4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); } .card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); } }

/* 전국 평균 유가 카드 */
.price-board { margin-top: -28px; }
.price-board .card { box-shadow: var(--shadow); }
.price-board-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.price-board-head h2 { margin: 0; font-size: 1.05rem; }
.price-items { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (min-width: 640px) { .price-items { grid-template-columns: repeat(4, 1fr); } }
.price-item {
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  padding: 12px; text-align: center;
}
.price-item .fuel-name { font-size: 0.85rem; font-weight: 700; color: var(--c-text-muted); display: block; }
.price-item .fuel-price { font-size: 1.3rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.price-item .fuel-unit { font-size: 0.75rem; color: var(--c-text-muted); }
.price-item .fuel-diff { display: block; font-size: 0.8rem; font-weight: 700; }
.diff-up { color: var(--c-danger); }
.diff-down { color: var(--c-primary); }
.diff-flat { color: var(--c-text-muted); }
.price-item[data-fuel="gasoline"] { border-top: 3px solid var(--fuel-gasoline); }
.price-item[data-fuel="premium"] { border-top: 3px solid var(--fuel-premium); }
.price-item[data-fuel="diesel"] { border-top: 3px solid var(--fuel-diesel); }
.price-item[data-fuel="lpg"] { border-top: 3px solid var(--fuel-lpg); }
.price-item[data-fuel="ev"] { border-top: 3px solid var(--fuel-ev); }

/* 신선도 신호 표기 */
.updated-at {
  font-size: 0.8rem; color: var(--c-text-muted);
  display: inline-flex; align-items: center; gap: 4px;
}
.updated-at::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-success); flex: none;
}
.updated-at.is-stale::before { background: var(--c-text-muted); }

/* 서비스 바로가기 카드 */
.feature-card { display: block; color: var(--c-text); }
.feature-card:hover { text-decoration: none; border-color: var(--c-primary); }
.feature-card .feature-icon { font-size: 1.6rem; display: block; margin-bottom: 8px; }
.feature-card h3 { margin-bottom: 4px; }
.feature-card p { margin: 0; font-size: 0.9rem; color: var(--c-text-muted); }

/* ==========================================================================
   6. 데이터 표 (유가·충전소·검사소 목록)
   ========================================================================== */
.data-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.data-table th, .data-table td {
  padding: 10px 12px; text-align: left;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.92rem; white-space: nowrap;
}
.data-table th { background: var(--c-bg); font-weight: 700; color: var(--c-text-muted); font-size: 0.82rem; }
.data-table td.num { font-variant-numeric: tabular-nums; font-weight: 700; text-align: right; }
.data-table tr:hover td { background: var(--c-primary-soft); }

.badge {
  display: inline-block; padding: 2px 8px;
  font-size: 0.75rem; font-weight: 700;
  border-radius: 99px; background: var(--c-primary-soft); color: var(--c-primary);
  vertical-align: middle;
}
.badge-accent { background: var(--c-accent-soft); color: #b45309; }
.badge-muted { background: var(--c-bg); color: var(--c-text-muted); }

/* 유가 기준일 배지 (숫자 옆 부착) */
.price-age {
  display: inline-block; margin-left: 4px; padding: 1px 6px;
  font-size: 0.72rem; font-weight: 700; vertical-align: middle;
  border-radius: 99px; background: #e6f4ec; color: var(--c-success);
}
.price-age.is-old { background: #fdf0e4; color: #b45309; }

/* 빈 데이터 상태 */
.empty-state {
  text-align: center; padding: 32px 16px;
  color: var(--c-text-muted); font-size: 0.95rem;
  border: 1px dashed var(--c-border); border-radius: var(--radius);
  background: var(--c-surface);
}

/* ==========================================================================
   7. 본문 (매거진·허브 글)
   ========================================================================== */
.content-main { padding: 28px 0 48px; }
.entry {
  background: var(--c-surface);
  border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 24px 18px;
}
@media (min-width: 640px) { .entry { padding: 36px 40px; } }
.entry-header { margin-bottom: 20px; }
.entry-meta { font-size: 0.85rem; color: var(--c-text-muted); display: flex; gap: 12px; flex-wrap: wrap; }
.entry-content { font-size: 1.02rem; }
.entry-content h2 { margin-top: 1.8em; padding-bottom: 0.3em; border-bottom: 2px solid var(--c-border); }
.entry-content h3 { margin-top: 1.5em; }
.entry-content img { border-radius: var(--radius-sm); }
.entry-content table th, .entry-content table td { padding: 8px 10px; border: 1px solid var(--c-border); font-size: 0.92rem; }
.entry-content table th { background: var(--c-bg); }
.entry-content blockquote {
  margin: 1em 0; padding: 12px 16px;
  border-left: 4px solid var(--c-primary); background: var(--c-primary-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 글 목록 카드 */
.post-card { display: block; color: var(--c-text); }
.post-card:hover { text-decoration: none; border-color: var(--c-primary); }
.post-card h3 { margin-bottom: 6px; font-size: 1.02rem; }
.post-card .excerpt { font-size: 0.88rem; color: var(--c-text-muted); margin: 0 0 8px; }

/* 페이지네이션 */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 24px; flex-wrap: wrap; }
.pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 44px; min-height: 44px; padding: 0 8px;
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  background: var(--c-surface); color: var(--c-text); font-weight: 600;
}
.pagination .page-numbers.current { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.pagination a.page-numbers:hover { border-color: var(--c-primary); text-decoration: none; }

/* ==========================================================================
   8. 주유소 상세·지역 허브 전용
   ========================================================================== */
.station-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 4px; }
.station-head h1 { margin: 0; }
.info-table th { width: 110px; font-weight: 700; color: var(--c-text-muted); text-align: left; }
.info-table th, .info-table td { padding: 8px 10px; border-bottom: 1px solid var(--c-border); font-size: 0.95rem; }

.breadcrumb { font-size: 0.85rem; color: var(--c-text-muted); margin: 16px 0; }
.breadcrumb a { color: var(--c-text-muted); }
.breadcrumb .sep { margin: 0 6px; }

/* 도구 페이지 */
.tool-panel { margin-bottom: 28px; }
.tool-panel .field-row { margin-bottom: 14px; }
.tool-panel label { font-weight: 700; font-size: 0.9rem; display: block; margin-bottom: 4px; }
.tool-panel input[type="number"], .tool-panel input[type="text"], .tool-panel select {
  width: 100%; min-height: 44px; padding: 8px 12px;
  font-size: 1rem; font-family: inherit;
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
}
.tool-result {
  background: var(--c-primary-soft); border-radius: var(--radius);
  padding: 16px; margin-top: 16px;
}
.tool-result .result-value { font-size: 1.5rem; font-weight: 800; font-variant-numeric: tabular-nums; }

/* ==========================================================================
   9. 푸터
   ========================================================================== */
.site-footer {
  margin-top: 48px;
  background: #20242c; color: #b8bec8;
  padding: 32px 0;
  font-size: 0.88rem;
}
.site-footer a { color: #dfe3ea; }
.footer-menu ul { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-source {
  padding: 12px 14px; margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.06); border-radius: var(--radius-sm);
  line-height: 1.7;
}
.footer-copy { color: #9aa3b0; font-size: 0.82rem; }

/* ==========================================================================
   10. 404·유틸리티
   ========================================================================== */
.page-404 { text-align: center; padding: 64px 16px; }
.page-404 .code { font-size: 3.5rem; font-weight: 800; color: var(--c-primary); line-height: 1; }
.text-muted { color: var(--c-text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }