html {
  box-sizing: border-box;
  height: 100%;
}

*,
*::before,
*::after {
  box-sizing: inherit;
  margin: 0;
  padding: 0;
}

body {
  align-items: center;
  background: linear-gradient(145deg, #1e1e2f, #12121a);
  display: flex;
  font-family: 'Dosis', sans-serif;
  height: 100%;
  justify-content: center;
  color: #f0f0f0;
}

.wrapper {
  background: #1e1e2f;
  border-radius: 20px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.4);
  padding: 25px 30px;
  flex-basis: 400px;
  height: 540px;
  border: 1px solid #2c2c3c;
}

.screen {
  background: #29293d;
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 36px;
  padding: 20px;
  text-align: right;
  margin-bottom: 20px;
  width: 100%;
  box-shadow: inset 0 0 10px #00000080;
}

.calc-button-row {
  display: flex;
  justify-content: space-between;
  margin: 5% 0;
}

.calc-button {
  background: #2f2f45;
  border: none;
  border-radius: 12px;
  color: #f0f0f0;
  flex-basis: 20%;
  font-family: inherit;
  font-size: 24px;
  height: 65px;
  transition: all 0.2s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.calc-button:hover {
  background: #3b3b55;
  transform: scale(1.05);
  cursor: pointer;
}

.calc-button:active {
  background-color: white;
  color: #000;
  box-shadow: inset 0 0 10px white;
}

.calc-button:last-child {
  background: #d72880;
  color: #fff;
}

.calc-button:last-child:hover {
  background: #e14191;
}

.double {
  flex-basis: 47%;
}

.triple {
  flex-basis: 73%;
}

.footer {
  padding: 15px 0;
  text-align: center;
  position: absolute;
  bottom: 0;
  width: 100%;
  font-family: 'Dosis', sans-serif;
  color: white;
}

body {
  position: relative;
  min-height: 100vh;
  padding-bottom: 60px; 
}