* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px;
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #222222;
}

a {
  color: #2f5d8a;
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

button {
  margin: 5px;
  padding: 10px 18px;
  cursor: pointer;
  border: 1px solid #bdbdbd;
  border-radius: 4px;
  background-color: #ffffff;
  color: #222222;
  font-size: 14px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

button:hover,
button:focus {
  background-color: #e9e9e9;
  border-color: #999999;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

input {
  padding: 10px 12px;
  border: 1px solid #bdbdbd;
  border-radius: 4px;
  background-color: #ffffff;
  color: #222222;
  font-size: 14px;
  outline: none;
}

input:focus {
  border-color: #2f5d8a;
}

.timer {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.field {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 90px;
  padding: 14px 10px;
  border: 1px solid #d6d6d6;
  border-radius: 6px;
  background-color: #ffffff;
}

.value {
  font-size: 30px;
  font-weight: bold;
  line-height: 1.1;
  margin-bottom: 6px;
}

.label {
  font-size: 13px;
  text-transform: uppercase;
  color: #666666;
}

@media screen and (max-width: 600px) {
  body {
    padding: 16px;
  }

  .timer {
    gap: 12px;
  }

  .field {
    min-width: 75px;
    padding: 12px 8px;
  }

  .value {
    font-size: 24px;
  }
}