@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

body {
  padding: 0;
  margin: 0;
  width: 100vw;
  height: 100vh;
  background-color: #eeeeee;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* TIP CALCULATOR HEADER */
.app {
  position: relative;
  width: 100%;
  max-width: 475px;
  background: #fff;
  border-radius: 16px;
  overflow-x: hidden;
  overflow-y: scroll;
  box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.2);
}
.app::after {
  content: "";
  display: block;
  padding-top: calc(100% / (3 / 4));
}

.calculator {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  height: 100%;
  overflow-y: hidden;
  display: flex;
  flex-direction: column;
}

header {
  background-color: #31383f;
  padding: 10px 15px;
  box-shadow: 0px 3px 12px rgba(0, 0, 0, 0.2);
}

h1 {
  color: #fff;
  text-transform: uppercase;
  font-size: 24px;
  text-align: center;
}

/* BILL AMOUNT */
main {
  flex: 1 1 100%;
  overflow: scroll;
  padding: 20px 15px;
}

.input-group {
  display: flex;
  margin-bottom: 30px;
}

.pre {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 15px;
  color: #31383f;
  font-size: 18px;
  border-bottom: 2px solid #31383f;
  background: #eeeeee;
  border-radius: 8px 0px 0px 0px;
}

/* TIP CALCULATOR HEADER */
input[type="number"] {
  appearance: none;
  border: none;
  outline: none;
  background: none;
  display: block;
  width: 100%;
  padding: 10px 15px;
  border-bottom: 2px solid #31383f;
  color: #31383f;
  font-size: 18px;
}

input::placeholder {
  color: #8e959e;
  font-size: 14px;
}

p.srv {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #31383f;
  width: 100%;
  font-size: 18px;
  padding: 10px 15px;
}

.service {
  border: none;
  outline: none;
  background: none;
  display: block;
  width: 100%;
  padding: 10px 15px 10px 15px;
  height: 165px;
}

input[type="radio"] {
  display: none;
  padding: 0;
  margin: 0;
}

label {
  position: relative;
  color: #31383f;
  font-size: 14px;
  padding: 2px 10px;
  display: flex;
  align-items: center;
  cursor: pointer;
  margin-top: -10px;
}

label::before {
  content: "";
  height: 10px;
  width: 10px;
  color: #5cdb95;
  border: 2px solid #31383f;
  border-radius: 12px;
  margin-right: 4px;
}

input[type="radio"]:checked + label {
  color: #5cdb95;
  font-size: 16px;
}

input[type="radio"]:checked + label::before {
  height: 9px;
  width: 9px;
  border: 3px solid #5cdb95;
  color: #5cdb95;
}

select {
  -webkit-appearance: none;
  appearance: none;
  border: none;
  outline: none;
  background: none;
  display: block;
  width: 100%;
  border-bottom: 2px solid #31383f;
  border-radius: 0px;
  color: #8e959e;
  font-size: 14px;
  padding: 10px 15px;
  cursor: pointer;
}

.tip-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

p.mdl {
  color: #31383f;
  font-size: 18px;
  margin-bottom: 15px;
}

.tip {
  padding: 15px 25px;
  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.2);
  background-color: #31383f;
  color: #fff;
  cursor: default;
}

footer {
  box-shadow: 0px -3px 12px rgba(0, 0, 0, 0.2);
}

button {
  appearance: none;
  border: none;
  outline: none;
  display: block;
  width: 100%;
  padding: 10px 15px;
  background-color: #5cdb95;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
}