* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  background: #f0f2f5;
  color: #333;
}

/* =========================================
   GLOBAL STYLES (Header, Layout, Utility)
========================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

header.main-header {
  text-align: center;
  margin-bottom: 40px;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

header.main-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: #388e3c;
  margin-bottom: 10px;
  letter-spacing: -1px;
}

header.main-header .subtitle {
  color: #666;
  font-size: 1.1rem;
}

.top-nav {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  padding: 15px 0;
}
.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}
.nav-container .logo {
  color: #388e3c;
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
}
.nav-container .menus a {
  text-decoration: none;
  color: #666;
  margin-left: 20px;
  font-size: 0.95rem;
}

/* =========================================
   INDEX PAGE (Sáng, chuẩn WordPress)
========================================= */
.regions {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.region-section {
  background: #fff;
  border-radius: 12px;
  padding: 30px;
  border: 1px solid #eaeaea;
  box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}

.region-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #d32f2f;
  border-bottom: 2px solid #eee;
  padding-bottom: 15px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 15px;
}

.card {
  background: #fcfcfc;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 15px;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  color: #333;
}

.card:hover {
  transform: translateY(-3px);
  background: #fff;
  border-color: #388e3c;
  box-shadow: 0 5px 15px rgba(56, 142, 60, 0.1);
  color: #388e3c;
}

/* =========================================
   DETAILS PAGE
========================================= */
.white-container {
  background: #fff;
  max-width: 900px;
  margin: 40px auto;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  padding: 50px;
}

.red-title {
  color: #d32f2f;
  text-align: center;
  font-size: 2.8rem;
  margin-bottom: 10px;
  font-weight: 600;
}

.yellow-price {
  color: #fbc02d;
  text-align: center;
  font-size: 1.6rem;
  margin-bottom: 25px;
  font-weight: 500;
}

.intro-text {
  color: #777;
  text-align: center;
  font-size: 1rem;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

.guide-title {
  color: #fbc02d;
  text-align: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.guide-list {
  list-style: none;
  padding: 0;
  max-width: 600px;
  margin: 0 auto 40px auto;
}

.guide-list li {
  color: #d32f2f;
  font-size: 1.1rem;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.icon-i {
  background: #fbc02d;
  color: #fff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-size: 0.9rem;
  margin-right: 15px;
  flex-shrink: 0;
}

.centered-form {
  max-width: 450px;
  margin: 0 auto;
}

.centered-form .form-group {
  margin-bottom: 15px;
}

.centered-form .form-group label {
  color: #333;
  font-size: 0.9rem;
  margin-bottom: 8px;
  display: block;
  font-weight: 500;
}

.centered-form .form-control, .form-box .form-control {
  background: #fcfcfc;
  border: 1px solid #eaeaea;
  color: #333;
  width: 100%;
  padding: 12px 15px;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: all 0.3s;
}

.centered-form .form-control:focus, .form-box .form-control:focus {
  background: #fff;
  border-color: #fbc02d;
  box-shadow: 0 0 0 3px rgba(251, 192, 45, 0.1);
}

.btn-submit {
  background: #d32f2f;
  color: #fff;
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 10px;
  transition: background 0.3s;
}

.btn-submit:hover {
  background: #b71c1c;
}

.two-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.data-box, .form-box {
  background: #f9f9f9;
  padding: 25px;
  border-radius: 12px;
  border: 1px solid #eee;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.white-table {
  width: 100%;
  border-collapse: collapse;
}

.white-table th, .white-table td {
  padding: 12px;
  border: 1px solid #eee;
  color: #333;
  text-align: left;
}

.white-table th {
  background: #f1f1f1;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.ketqua-none {
  display: none;
}

@media (max-width: 768px) {
  .white-container {
      padding: 20px;
      margin: 20px;
  }
  .red-title {
      font-size: 2rem;
  }
  .two-cols {
      grid-template-columns: 1fr;
  }
  header.main-header h1 {
      font-size: 1.8rem;
  }
}