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

:root {
  --hover: #ffb8b8;
  --main: #ff6b6b;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

body {
  font-family: "Noto Sans Thai", sans-serif;
  background: #f8f9fb;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

#scrollTopBtn {
  display: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  width: 50px;
  height: 50px;
  background-color: var(--main);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  transition: background-color 0.3s;
}

#scrollTopBtn:hover {
  background-color: #e55a5a;
}