/* ===== Thai Postal Code — Shared Stylesheet ===== */
@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&display=swap');

:root {
  --yellow:  #f49c0b;
  --yellow-dk:  #d78601;
  --gold:    #f5a623;
  --bg:      #f7f7f5;
  --bg-card: #ffffff;
  --text:    #1a1a1a;
  --text-2:  #555555;
  --text-3:  #888888;
  --border:  #e0e0e0;
  --shadow:  0 2px 8px rgba(0,0,0,.08);
  --radius:  10px;
  --font:    'Sarabun', 'Noto Sans Thai', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.6; }
a { color: var(--yellow); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--yellow-dk); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

/* Header */
header { background: var(--yellow); color: #fff; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 12px rgba(0,0,0,.2); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; gap: 12px; }
.logo { font-size: 1.25rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 6px; }
.logo span { color: #1a1a1a; }
.logo:hover { text-decoration: none; }
nav { display: flex; gap: 4px; }
nav a { color: rgba(0, 0, 0, 0.9); padding: 6px 14px; border-radius: 20px; font-size: .9rem; font-weight: 500; transition: background .2s; }
nav a:hover, nav a.active { background: rgba(255,255,255,.2); text-decoration: none; color: #fff; }

/* Hero */
.hero { background: linear-gradient(135deg, var(--yellow) 0%, #d70000 100%); padding: 48px 16px 56px; text-align: center; color: #fff; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700; margin-bottom: 8px; }
.hero p { font-size: 1rem; opacity: .85; margin-bottom: 28px; }
.hero-sm { padding: 28px 16px 36px; }
.hero-sm h1 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 4px; }
.hero-sm p { margin-bottom: 0; font-size: .9rem; }

/* Search */
.search-wrap { max-width: 600px; margin: 0 auto; position: relative; }
.search-wrap input { width: 100%; padding: 16px 130px 16px 20px; border: 3px solid rgba(255,255,255,.3); border-radius: 50px; font-size: 1.05rem; font-family: var(--font); background: rgba(255,255,255,.95); color: var(--text); outline: none; transition: border .2s, box-shadow .2s; }
.search-wrap input:focus { border-color: var(--gold); box-shadow: 0 0 0 4px rgba(245,166,35,.25); }
.search-wrap input::placeholder { color: var(--text-3); }
.search-wrap button { position: absolute; right: 6px; top: 6px; bottom: 6px; padding: 0 22px; background: var(--gold); color: #fff; border: none; border-radius: 50px; font-size: .95rem; font-weight: 600; font-family: var(--font); cursor: pointer; transition: background .2s; white-space: nowrap; }
.search-wrap button:hover { background: #d4891e; }

/* Autocomplete */
.autocomplete-box { position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: #fff; border-radius: var(--radius); box-shadow: 0 8px 30px rgba(0,0,0,.18); max-height: 320px; overflow-y: auto; z-index: 200; display: none; text-align: left; }
.autocomplete-box.open { display: block; }
.ac-item { padding: 12px 18px; cursor: pointer; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 8px; transition: background .15s; }
.ac-item:last-child { border-bottom: none; }
.ac-item:hover, .ac-item.focused { background: #fff5f5; }
.ac-item .ac-name { font-weight: 500; color: var(--text); }
.ac-item .ac-sub { font-size: .83rem; color: var(--text-3); }
.ac-item .ac-code { font-weight: 700; color: var(--yellow); font-size: 1.1rem; white-space: nowrap; }

/* Ad */
.ad-banner { background: #fff; border-bottom: 1px solid var(--border); padding: 8px 0; text-align: center; }
.ad-label { font-size: .7rem; color: var(--text-3); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .05em; }

/* Main layout */
main { padding: 24px 0 48px; }
.main-grid { display: grid; grid-template-columns: 1fr 300px; gap: 24px; align-items: start; }

/* Breadcrumb */
.breadcrumb { padding: 0 0 20px; font-size: .85rem; color: var(--text-3); display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--yellow); text-decoration: none; }
.breadcrumb .sep { color: var(--border); }

/* Section title */
.section-title { font-size: 1.25rem; font-weight: 700; color: var(--yellow); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.section-title::after { content: ''; flex: 1; height: 2px; background: linear-gradient(to right, var(--border), transparent); }

/* Province selector */
.province-select-wrap { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); padding: 20px; margin-bottom: 24px; }
.province-select-wrap label { display: block; font-weight: 600; margin-bottom: 10px; color: var(--text-2); }
.province-select-wrap select { width: 100%; padding: 12px 16px; border: 2px solid var(--border); border-radius: 8px; font-size: 1rem; font-family: var(--font); color: var(--text); background: #fff; cursor: pointer; outline: none; transition: border .2s; }
.province-select-wrap select:focus { border-color: var(--yellow); }
.province-select-wrap .select-btn { display: inline-block; margin-top: 10px; padding: 10px 24px; background: var(--yellow); color: #fff; border: none; border-radius: 8px; font-size: 1rem; font-family: var(--font); font-weight: 600; cursor: pointer; transition: background .2s; }
.province-select-wrap .select-btn:hover { background: var(--yellow-dk); }

/* Region accordion */
.regions { display: flex; flex-direction: column; gap: 12px; }
.region-card { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); overflow: hidden; }
.region-header { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; cursor: pointer; background: #fff; user-select: none; transition: background .2s; }
.region-header:hover { background: #fff8f8; }
.region-header.open { background: var(--yellow); color: #fff; }
.region-name { font-weight: 600; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.region-count { font-size: .8rem; opacity: .7; margin-left: 4px; }
.region-arrow { font-size: .8rem; transition: transform .25s; }
.region-header.open .region-arrow { transform: rotate(180deg); }
.province-list { display: none; padding: 16px 18px; background: #fafafa; border-top: 1px solid var(--border); }
.province-list.open { display: block; }
.province-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; }
.province-link { display: block; padding: 8px 12px; background: #fff; border: 1px solid var(--border); border-radius: 6px; font-size: .9rem; color: var(--text); text-align: center; transition: all .2s; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.province-link:hover { background: var(--yellow); color: #fff; border-color: var(--yellow); text-decoration: none; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(204,0,0,.2); }

/* Province table page */
.filter-bar { margin-bottom: 14px; }
.filter-bar input { width: 100%; padding: 12px 16px; border: 2px solid var(--border); border-radius: 8px; font-size: 1rem; font-family: var(--font); outline: none; transition: border .2s; background: #fff; }
.filter-bar input:focus { border-color: var(--yellow); }
.table-wrap { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); overflow: hidden; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead { background: var(--yellow); color: #fff; }
thead th { padding: 14px 16px; text-align: left; font-weight: 600; font-size: .95rem; }
tbody tr { border-bottom: 1px solid var(--border); transition: background .15s; }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #fff5f5; }
tbody td { padding: 12px 16px; font-size: .95rem; }
tbody td.code { font-weight: 700; color: var(--yellow); font-size: 1.05rem; letter-spacing: .05em; }

/* Region hero */
.region-hero{background:linear-gradient(135deg,var(--yellow) 0%,#8b0000 100%);padding:36px 16px 48px;text-align:center;color:#fff;}
.region-hero h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:700;margin-bottom:6px}
.stats{display:inline-flex;gap:20px;margin-top:14px;background:rgba(255,255,255,.15);border-radius:50px;padding:9px 22px;font-size:.88rem}
.stat{display:flex;flex-direction:column;align-items:center}.stat strong{font-size:1.3rem;font-weight:700;line-height:1}
.prov-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px;margin-bottom:24px}
.prov-card{display:block;background:#fff;border:1.5px solid var(--border);border-radius:var(--radius);padding:14px;text-decoration:none;transition:all .2s;position:relative}
.prov-card::after{content:'→';position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--border);transition:all .2s}
.prov-card:hover{border-color:var(--yellow);box-shadow:0 4px 16px rgba(204,0,0,.12);transform:translateY(-2px);text-decoration:none}
.prov-card:hover::after{color:var(--yellow);right:8px}
.prov-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:5px}
.prov-name{font-weight:700;font-size:.95rem;color:var(--text)}.prov-code{font-size:.72rem;color:#fff;background:var(--yellow);border-radius:20px;padding:2px 7px;white-space:nowrap}
.prov-note{font-size:.8rem;color:var(--text-3);margin-bottom:3px}.prov-meta{font-size:.78rem;color:var(--yellow);font-weight:600}
.view-toggle{display:flex;gap:8px;margin-bottom:14px}
.view-btn{padding:7px 16px;border-radius:8px;border:2px solid var(--border);background:#fff;font-family:var(--font);font-size:.88rem;cursor:pointer;transition:all .2s;font-weight:500}
.view-btn.active,.view-btn:hover{border-color:var(--yellow);background:var(--yellow);color:#fff}
.other-regions{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px}
.other-region-link{display:flex;align-items:center;gap:6px;padding:10px 12px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);font-size:.88rem;color:var(--text);font-weight:500;transition:all .2s;text-decoration:none}
.other-region-link:hover{border-color:var(--yellow);color:var(--yellow);box-shadow:0 2px 8px rgba(204,0,0,.1)}

/* Content box */
.content-box { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); padding: 24px; margin-top: 0; }
.content-box h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.content-box p { font-size: .95rem; color: var(--text-2); margin-bottom: 10px; line-height: 1.75; }
.content-box p:last-child { margin-bottom: 0; }

/* FAQ */
.faq-section { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); padding: 24px; margin-top: 24px; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-q { padding: 16px 0; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; user-select: none; }
.faq-q:hover { color: var(--yellow); }
.faq-q .faq-icon { flex-shrink: 0; transition: transform .2s; }
.faq-q.open .faq-icon { transform: rotate(45deg); }
.faq-a { display: none; padding: 0 0 16px; color: var(--text-2); font-size: .95rem; line-height: 1.75; }
.faq-a.open { display: block; }

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 20px; }
.sticky-ad { position: sticky; top: 72px; display: flex; flex-direction: column; gap: 20px; }
.sidebar-card { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); overflow: hidden; }
.sidebar-card-title { background: var(--yellow); color: #fff; padding: 12px 16px; font-weight: 600; font-size: .95rem; }
.sidebar-card-body { padding: 16px; }
.quick-links { display: flex; flex-direction: column; gap: 4px; }
.quick-link { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 6px; color: var(--text); font-size: .9rem; transition: background .15s; }
.quick-link:hover { background: #fff0f0; text-decoration: none; color: var(--yellow); }

/* Info box */
.info-box { background: #fff8f0; border-left: 4px solid var(--gold); border-radius: 0 var(--radius) var(--radius) 0; padding: 16px 18px; margin-top: 24px; font-size: .95rem; color: var(--text-2); line-height: 1.7; }

/* Footer */
footer { background: #1a1a1a; color: rgba(255,255,255,.7); padding: 32px 16px 24px; margin-top: 48px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; margin-bottom: 24px; }
.footer-col h3 { color: #fff; font-size: 1rem; margin-bottom: 12px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 6px; }
.footer-col ul li a { color: rgba(255,255,255,.6); font-size: .9rem; }
.footer-col ul li a:hover { color: #fff; text-decoration: none; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; text-align: center; font-size: .85rem; }
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: #fff; }

/* ===== Hamburger Menu ===== */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  /* Layout */
  .main-grid { grid-template-columns: 1fr; }

  /* Sidebar — แสดงใต้ content แทนซ่อน */
  .sidebar { display: flex; }
  .sticky-ad { position: static; }

  /* Nav — hamburger */
  .nav-toggle { display: block; }
  #mainNav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--yellow-dk);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,.2);
    z-index: 99;
  }
  #mainNav.open { display: flex; }
  #mainNav a {
    border-radius: 0;
    padding: 12px 20px;
    font-size: 1rem;
  }
  #mainNav a:hover, #mainNav a.active { background: rgba(0,0,0,.15); }

  /* Header ต้องเป็น relative เพื่อให้ nav absolute ทำงาน */
  header { position: sticky; top: 0; }
  .header-inner { position: relative; }

  /* Search bar */
  .search-wrap input { padding: 14px 56px 14px 16px; font-size: 1rem; }
  .search-wrap button { padding: 0 14px; font-size: 0; }
  .search-wrap button::before { content: '🔍'; font-size: 1.1rem; }

  /* Province grid */
  .province-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }

  /* Prov grid (region page) */
  .prov-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }

  /* Stats strip */
  .stats { flex-wrap: wrap; gap: 12px; }

  /* Table — ข้อความย่อลงนิดหน่อย */
  thead th, tbody td { padding: 10px 12px; font-size: .88rem; }

  /* Footer grid */
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .hero { padding: 36px 12px 44px; }
  .hero h1 { font-size: 1.4rem; }
  .prov-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .other-regions { grid-template-columns: 1fr 1fr; }
  .view-toggle { flex-wrap: wrap; }
}