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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  min-height: 100vh;
  background: rgb(142, 219, 255);
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.outer-body {
  width: 690px;
  min-height: 525px;
  background-color: rgb(136, 136, 136);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-evenly;
  border-radius: 40px;
}

.heading {
  font-family: "DSEG7Classic-Regular", monospace;
  font-size: 40px;
  width: 650px;
  text-align: center;
  color: white;
  border-radius: 15px;
  padding: 1rem 2rem;
  margin-bottom: 5px;
  text-shadow: 5px 2px 2px red;
}
.clock {
  width: 650px;
  height: 350px;
  background-color: rgb(1, 0, 41);
  border-radius: 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.format {
  display: flex;
  gap: 10px;
}
.clock .btn {
  padding: 0.5rem 2rem;
  border: none;
  background: none;
  font-size: 20px;
  border-radius: 5px;
  color: white;
}
.clock .btn:hover {
  background: #c0ccff;
  color: rgb(51, 51, 51);
}
.clock .btn.active {
  background: #4265ff;
}
.time {
  font-family: "DSEG7Classic-Regular", monospace;
  font-size: 90px;
  font-weight: 900;
  color: #0099ff;
  text-shadow: 2px 2px 2px white;
}
.date {
  font-size: 32px;
  color: white;
}
.period {
  font-size: 40px;
  margin-left: 10px;
}