/* ============================================
   郵便番号検索 - style.css
   Design: 実用的・高速・信頼感
   Color: 日本郵便の赤 + ニュートラル
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --red: #cc0000;
  --red-dark: #a00000;
  --red-light: #fff0f0;
  --bg: #ffffff;
  --bg-alt: #f7f7f8;
  --bg-card: #ffffff;
  --text: #1a1a1a;
  --text-sub: #666666;
  --text-light: #999999;
  --border: #e0e0e0;
  --border-light: #eeeeee;
  --link: #0055aa;
  --link-hover: #003d7a;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
  --max-w: 960px;
  --font-body: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'IBM Plex Sans', 'Noto Sans JP', sans-serif;
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

img { max-width: 100%; height: auto; }

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

/* --- Header --- */
.site-header {
  background: var(--bg);
  border-bottom: 3px solid var(--red);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  font-size: 1.5rem;
  color: var(--red);
  font-weight: 700;
  line-height: 1;
}
.logo-text {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.header-search { flex: 1; max-width: 400px; }

/* --- Search Form --- */
.search-form {
  display: flex;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}
.search-form:focus-within { border-color: var(--red); }
.search-form input[type="search"] {
  flex: 1;
  border: none;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-family: var(--font-body);
  outline: none;
  min-width: 0;
  background: transparent;
}
.search-form input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: none; }
.search-form button {
  background: var(--red);
  color: #fff;
  border: none;
  padding: 8px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}
.search-form button:hover { background: var(--red-dark); }

.search-form--large {
  border-width: 2px;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
}
.search-form--large input[type="search"] {
  padding: 14px 18px;
  font-size: 1rem;
}
.search-form--large button {
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-body);
}

/* --- Breadcrumb --- */
.breadcrumb {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border-light);
}
.breadcrumb-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 8px 16px;
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--text-sub);
}
.breadcrumb li:not(:last-child)::after {
  content: '>';
  margin-left: 4px;
  color: var(--text-light);
}
.breadcrumb a { color: var(--text-sub); }
.breadcrumb a:hover { color: var(--link); }

/* --- Main Content --- */
.main-content { padding: 24px 0 48px; min-height: 60vh; }

h1 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}
h2 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--red);
  line-height: 1.3;
}
.page-summary {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

/* --- Top Page: Hero --- */
.hero {
  text-align: center;
  padding: 40px 0 32px;
}
.hero h1 {
  font-size: 1.8rem;
  margin-bottom: 4px;
}
.hero-sub {
  color: var(--text-sub);
  margin-bottom: 24px;
  font-size: 0.95rem;
}
.hero-search {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}
.search-preview {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow-md);
  max-height: 320px;
  overflow-y: auto;
  z-index: 50;
}

/* --- Top Page: Prefecture Grid --- */
.pref-section { margin-top: 8px; }
.pref-grid { display: flex; flex-direction: column; gap: 16px; }
.pref-region {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 16px 20px;
}
.region-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 8px;
  border-bottom: none;
  padding-bottom: 0;
}
.pref-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.pref-link {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  font-size: 0.88rem;
  transition: all 0.12s;
}
.pref-link:hover {
  border-color: var(--red);
  background: var(--red-light);
  text-decoration: none;
}
.pref-count {
  font-size: 0.72rem;
  color: var(--text-light);
}

/* --- Top Page: Usage Cards --- */
.about-section h2 { text-align: center; border-bottom: none; }
.usage-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.usage-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.usage-icon { font-size: 1.8rem; margin-bottom: 8px; }
.usage-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  border-bottom: none;
  padding-bottom: 0;
}
.usage-card p { font-size: 0.82rem; color: var(--text-sub); }

/* --- Filter --- */
.filter-section { margin-bottom: 16px; }
.filter-input {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: var(--font-body);
  transition: border-color 0.15s;
  outline: none;
}
.filter-input:focus { border-color: var(--red); }

/* --- Data Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.data-table thead { background: var(--bg-alt); }
.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-sub);
  border-bottom: 2px solid var(--border);
}
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-light);
}
.data-table tbody tr:hover { background: var(--red-light); }
.col-count { text-align: right; white-space: nowrap; }
.col-zip { white-space: nowrap; font-feature-settings: 'tnum'; }
.col-kana { color: var(--text-sub); font-size: 0.82rem; }
.note-badge {
  display: inline-block;
  margin-left: 4px;
  color: var(--red);
  font-weight: 700;
  cursor: help;
  font-size: 0.78rem;
}

/* --- Zipcode Detail --- */
.zipcode-detail { margin-bottom: 16px; }
.detail-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  border-left: 4px solid var(--red);
  padding: 24px;
  margin-bottom: 12px;
}
.detail-address { margin-bottom: 20px; }
.detail-zip-label {
  font-size: 0.9rem;
  color: var(--text-sub);
}
.detail-zip-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--red);
  letter-spacing: 0.02em;
}
.detail-full-address {
  font-size: 1.15rem;
  font-weight: 500;
  margin-top: 4px;
}
.detail-list { display: flex; flex-direction: column; gap: 0; }
.detail-row {
  display: flex;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}
.detail-row:last-child { border-bottom: none; }
.detail-row dt {
  flex: 0 0 160px;
  font-size: 0.82rem;
  color: var(--text-sub);
  padding-top: 2px;
}
.detail-row dd { flex: 1; font-size: 0.9rem; }
.detail-note {
  font-size: 0.82rem;
  color: var(--text-sub);
  line-height: 1.5;
}

/* --- Copy Buttons --- */
.copy-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.82rem;
  font-family: var(--font-body);
  cursor: pointer;
  color: var(--text-sub);
  transition: all 0.12s;
}
.copy-btn:hover {
  border-color: var(--red);
  color: var(--red);
}
.copy-btn.copied {
  border-color: #22c55e;
  color: #16a34a;
  background: #f0fdf4;
}

/* --- Same City Grid --- */
.same-city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 6px;
}
.same-city-link {
  display: flex;
  flex-direction: column;
  padding: 8px 12px;
  background: var(--bg-alt);
  border-radius: 4px;
  font-size: 0.82rem;
  transition: background 0.12s;
}
.same-city-link:hover {
  background: var(--red-light);
  text-decoration: none;
}
.same-city-link.is-current {
  background: var(--red);
  color: #fff;
}
.same-city-link.is-current .sc-zip,
.same-city-link.is-current .sc-name { color: #fff; }
.sc-zip {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text);
}
.sc-name { color: var(--text-sub); font-size: 0.78rem; }
.see-all {
  margin-top: 12px;
  font-size: 0.88rem;
}

/* --- Prev/Next Nav --- */
.nav-prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.nav-link {
  display: flex;
  flex-direction: column;
  padding: 14px 16px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all 0.12s;
}
.nav-link:hover {
  border-color: var(--red);
  background: var(--red-light);
  text-decoration: none;
}
.nav-next { text-align: right; }
.nav-dir { font-size: 0.75rem; color: var(--text-light); }
.nav-zip {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
}
.nav-addr { font-size: 0.78rem; color: var(--text-sub); }
.nav-disabled { visibility: hidden; }

/* --- Nearby / Info --- */
.nearby-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.nearby-list li {
  font-size: 0.85rem;
}
.info-list { display: flex; flex-wrap: wrap; gap: 16px; }
.info-item {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 12px 16px;
  flex: 1;
  min-width: 140px;
}
.info-item dt { font-size: 0.75rem; color: var(--text-sub); }
.info-item dd { font-size: 1rem; font-weight: 600; }
.alternates-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.alternates-list li {
  font-size: 0.88rem;
  padding: 6px 12px;
  background: var(--bg-alt);
  border-radius: 4px;
}

/* --- Ad Slots --- */
.ad-slot {
  margin: 20px 0;
  min-height: 0;
  text-align: center;
}
.ad-slot:empty { display: none; }

/* --- Footer --- */
.site-footer {
  background: var(--text);
  color: #ccc;
  padding: 32px 0 24px;
  margin-top: 48px;
  font-size: 0.8rem;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 16px;
}
.footer-prefectures h3 {
  color: #fff;
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.footer-pref-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 24px;
}
.footer-region {
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.region-label {
  flex: 0 0 70px;
  color: var(--red);
  font-weight: 600;
  font-size: 0.78rem;
}
.region-links { display: flex; flex-wrap: wrap; gap: 4px 10px; }
.region-links a { color: #aaa; font-size: 0.78rem; }
.region-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #444;
  padding-top: 16px;
}
.footer-disclaimer {
  font-size: 0.72rem;
  color: #888;
  margin-bottom: 8px;
  line-height: 1.6;
}
.footer-disclaimer a { color: #aaa; }
.footer-copyright {
  font-size: 0.72rem;
  color: #666;
}

/* --- Mobile --- */
@media (max-width: 640px) {
  .header-inner { padding: 8px 12px; gap: 10px; }
  .logo-text { font-size: 0.9rem; }
  .hero { padding: 28px 0 24px; }
  .hero h1 { font-size: 1.4rem; }
  h1 { font-size: 1.25rem; }
  .detail-zip-number { font-size: 1.5rem; }
  .detail-row { flex-direction: column; gap: 2px; }
  .detail-row dt { flex: none; }
  .nav-prev-next { grid-template-columns: 1fr; }
  .same-city-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .col-kana { display: none; }
  .data-table { font-size: 0.85rem; }
  .data-table th, .data-table td { padding: 8px; }
  .footer-region { flex-direction: column; gap: 2px; }
  .region-label { flex: none; }
}