body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  font-weight: 900;
  margin: 0;
  padding: 0;
  background-color: #fafafa;
  color: #333;
  line-height: clamp(1.5, 2.2vw, 1.7);
}

header{
  background:#ff4d6d; color:#fff;
  padding: clamp(16px, 5vw, 40px) clamp(12px, 4vw, 20px);
  text-align:center;
  position: relative; /* for #closeBtn */
}
header h1{ margin:0; font-size: clamp(20px, 4.8vw, 32px); line-height:1.2; }

.title{
  color:red;
  font-family: inherit;
  font-weight: 900;
  font-size: clamp(24px, 5vw, 36px);
  letter-spacing: clamp(.2px, .6vw, 2px);
}

.brand b{ font-size: clamp(16px, 2.8vw, 20px); letter-spacing:.3px; }

main{
  max-width: clamp(720px, 92vw, 900px);
  margin: clamp(20px, 6vw, 40px) auto;
  padding: 0 clamp(12px, 4vw, 20px);
}

h2{
  margin-top: clamp(18px, 5vw, 30px);
  color:#222;
  border-bottom: 2px solid #ddd;
  padding-bottom: clamp(4px, 1.6vw, 8px);
  font-size: clamp(18px, 3.6vw, 26px);
}

ul{ padding-left: clamp(14px, 3.6vw, 20px); }
li{ margin-bottom: clamp(6px, 2vw, 10px); }

footer{
  text-align:center;
  padding: clamp(16px, 5vw, 30px);
  font-size: clamp(.85rem, 1.9vw, .95rem);
  color:#777;
  margin-top: clamp(24px, 6vw, 40px);
}

a{ color:#0077cc; text-decoration:none; }
a:hover{ text-decoration:underline; }

table{ border-collapse: collapse; width:100%; font-size: clamp(13px, 2.6vw, 16px); }
th, td{ border:1px solid #000; padding: clamp(6px, 1.8vw, 12px); text-align:left; }

#closeBtn{
  position:absolute;
  top: clamp(6px, 2.5vw, 10px);
  right: clamp(10px, 5vw, 20px);
  font-size: clamp(16px, 4.2vw, 20px);
  background:transparent; border:none; cursor:pointer; line-height:1;
}