/* ===========================
   BUY ELECTRICITY
=========================== */

body {
  background: #f5f7fb;
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 20px;
}

.electricity-container {
  max-width: 450px;
  margin: 20px auto;
  background: #fff;
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.electricity-container h1 {
  text-align: center;
  color: #0066ff;
  font-size: 28px;
  margin-bottom: 25px;
}

.electricity-container h2 {
  font-size: 18px;
  color: #333;
  margin: 20px 0 15px;
}

.provider-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.provider-card {
  background: #fff;
  border: 2px solid #e6e6e6;
  border-radius: 15px;
  padding: 15px 10px;
  text-align: center;
  cursor: pointer;
  transition: .3s;
}

.provider-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 18px rgba(0, 102, 255, .15);
}

.provider-card.active {
  border-color: #0066ff;
  background: #eef5ff;
}

.provider-card img {
  width: 55px;
  height: 55px;
  object-fit: contain;
  margin: 0 auto 10px;
}

.provider-card span {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #333;
}
/* ===========================
   METER TYPE
=========================== */

.meter-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  margin-bottom: 20px;
}

.meter-card {
  background: #fff;
  border: 2px solid #e6e6e6;
  border-radius: 15px;
  padding: 18px 10px;
  text-align: center;
  cursor: pointer;
  transition: .3s;
}

.meter-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 18px rgba(0, 102, 255, .15);
}

.meter-card.active {
  border-color: #0066ff;
  background: #eef5ff;
}

.meter-card i {
  font-size: 28px;
  color: #0066ff;
  margin-bottom: 10px;
  display: block;
}

.meter-card span {
  font-size: 15px;
  font-weight: 600;
  color: #333;
}

/* ===========================
   INPUT FIELDS
=========================== */

#meter-number,
#customer-name,
#amount {
  width: 100%;
  box-sizing: border-box;
  padding: 15px;
  margin-bottom: 15px;
  border: 2px solid #e6e6e6;
  border-radius: 12px;
  font-size: 16px;
  outline: none;
  transition: .3s;
  background: #fff;
}

#meter-number:focus,
#customer-name:focus,
#amount:focus {
  border-color: #0066ff;
}

#customer-name {
  background: #f8f9fc;
}

/* ===========================
   BUTTON
=========================== */

#buy-electricity-btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 12px;
  background: #0066ff;
  color: #fff;
  font-size: 17px;
  font-weight: bold;
  cursor: pointer;
  transition: .3s;
  margin-top: 10px;
}

#buy-electricity-btn:hover {
  background: #0052cc;
  transform: translateY(-2px);
}

/* ===========================
   BACK BUTTON
=========================== */

.back-link {
  display: block;
  text-align: center;
  margin-top: 20px;
  color: #0066ff;
  text-decoration: none;
  font-weight: 600;
}

.back-link i {
  margin-right: 6px;
}

/* ===========================
   MOBILE
=========================== */

@media(max-width:480px) {
  
  .electricity-container {
    padding: 18px;
  }
  
  .provider-grid {
    gap: 12px;
  }
  
  .provider-card {
    padding: 12px 8px;
  }
  
  .provider-card img {
    width: 45px;
    height: 45px;
  }
}