html, body {
  margin: 0;
  width: 100%;
  height: 100%;
}

body {
  background: #fff;
  font-family: Arial, Helvetica, sans-serif;
  color: #222;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: 100%;
}

header {
  width: 100%;
  height: 96px;
  flex: 0 0 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0 auto;
}

.logo {
  display: block;
  width: min(42vw, 300px);
  height: auto;
  margin: 0 auto;
}

main {
  width: 100%;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0 auto;
}

.countdown {
  display: block;
  width: 100%;
  margin: 0;
  text-align: center;
  font-size: clamp(30px, 6vw, 76px);
  font-weight: 300;
  letter-spacing: 0.06em;
  color: #d8a9c5;
  font-variant-numeric: tabular-nums;
}

footer {
  width: 100%;
  height: 42px;
  flex: 0 0 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0 auto;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #888;
}
.menu {
  width: 100%;
  height: 42px;
  flex: 0 0 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  border-top: 1px solid #eee;
  border-bottom: 1px solid #eee;
}

.menu a {
  color: #d8a9c5;
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.menu a:hover {
  color: #0000ff;
}
@media (max-width: 600px) {
  header {
    height: 80px;
    flex-basis: 80px;
  }

  .logo {
    width: min(65vw, 260px);
  }

  .countdown {
    font-size: clamp(28px, 10vw, 58px);
  }
}