body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #fff;
  color: #333;
}
header {
  background: #fff;
  border-bottom: 3px solid #009fe3;
  padding: 12px 32px;
}
header img {
  height: 40px;
  display: block;
}
main {
  max-width: 400px;
  margin: 80px auto;
  padding: 0 24px;
  text-align: center;
}
h1 {
  color: #1b3a5c;
  font-size: 1.5rem;
  margin-bottom: 16px;
  margin-left: 35px;
}
p {
  line-height: 1.6;
  margin-bottom: 16px;
}
a {
  color: #009fe3;
}
.sds-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sds-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.sds-lang {
  width: 28px;
  text-align: right;
  font-weight: 700;
  color: #1b3a5c;
}
.sds-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 20px;
  background-color: #009fe3;
  color: #fff;
  font-weight: 500;
  font-size: 16px;
  text-decoration: none;
  border: none;
  cursor: pointer;
}
.sds-btn:hover {
  background-color: #0087c2;
}
.sds-btn--disabled {
  background-color: #e5e5e5;
  color: #999;
  cursor: not-allowed;
}