body {
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 850px;
  margin: 40px auto;
  padding: 40px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.8;
  color: #333;
  background: #fff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  border-bottom: 3px solid #333;
  padding-bottom: 15px;
  margin-bottom: 40px;
  font-size: 28px;
}

h2 {
  font-size: 20px;
  border-left: 5px solid #ff4d00;
  margin-top: 40px;
  margin-bottom: 20px;
  background: #f9f9f9;
  padding: 5px 0 5px 15px;
}

h3 {
  font-size: 18px;
  margin-top: 25px;
  color: #ff4d00;
}

p,
li {
  font-size: 15px;
}

ul,
ol {
  padding-left: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 40px;
  border: 1px solid #ddd;
}

th {
  width: 30%;
  background-color: #f8f9fa;
  padding: 15px;
  text-align: left;
  vertical-align: top;
  border: 1px solid #ddd;
  font-weight: bold;
}

td {
  padding: 15px;
  vertical-align: top;
  border: 1px solid #ddd;
}

.text-right {
  text-align: right;
  color: #666;
  font-size: 14px;
}

.text-center {
  text-align: center;
  margin-top: 50px;
}

.back-btn {
  display: inline-block;
  padding: 12px 24px;
  background-color: #333;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  transition: background 0.3s;
}

.back-btn:hover {
  background-color: #555;
}

.important,
.important-note {
  color: #d9534f;
  font-weight: bold;
}

.price-note {
  font-size: 0.9em;
  color: #666;
}

@media (max-width: 600px) {
  .container {
    margin: 0;
    padding: 28px 20px;
  }

  th,
  td {
    display: block;
    width: 100%;
  }

  th {
    border-bottom: none;
  }
}