:root {
  /* --calculator-clr: #1d1d1d;
  --btn-clr-number: #303030;
  --btn-clr-operator: #f59115;
  --btn-clr-mod: #46332e;
   */
  
  --calculator-clr: #11100fe7;
  --screen-clr: #282726;
  --btn-clr-number: #302e35;
  --btn-clr-mod: #60b478ef;
  --btn-clr-operator: #6b50bf;
  
  --btn-clr-number-hover: #302e359b;
  --btn-clr-mod-hover: #60b478d4;
  --btn-clr-operator-hover: #6c50bfea;
  
  --ff-iOS: 'Helvetica Neue', Helvetica;

  --fs-13px: 0.8125rem;
  --fs-14px: 0.875rem;
  --fs-15px: 0.9375rem;
  --fs-16px: 1rem;
  --fs-18px: 1.125rem;
  --fs-20px: 1.25rem;
  --fs-24px: 1.5rem;
  --fs-30px: 1.875rem;
  --fs-35px: 2.1875rem;
  --fs-40px: 2.5rem;

  --fw-thin: 100;
  --fw-extraLight: 200;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semiBold: 600;
  --fw-bold: 700;
  --fw-extraBold: 800;
  --fw-black: 900;
}

* {
  font-family: var(--ff-iOS);
}

body {
  margin: 0;
  padding: 0;
}

input {
  border: none;
  outline: none;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: rgba(23, 82, 122, 0.701);
}

#calculator {
  background-color: var(--calculator-clr);
  box-shadow: 0 4px 30px rgba(17, 59, 86, 0.731);
  backdrop-filter: blur(8px);
  border-radius: 8px;
  border: 2px solid rgba(5, 28, 44, 0.907);
  max-width: 300px;
  max-height: 500px
}

.input-keys {
  display: grid;
  justify-content: center;
  grid-template-columns: 60px 60px 60px 60px;
  padding: 16px 16px 16px 16px;
  gap: 0.5rem;
}

.input-keys input{
  background-color: var(--btn-clr-number);
  color: #E1E5E9;
  font-size: var(--fs-20px);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  transition: background-color 0.25s linear;
}

.input-keys input:hover {
  background-color: var(--btn-clr-number-hover);
}

.input-keys input:active {
  opacity: 50%;
}

.screen-display {
  background-color: var(--screen-clr);
  color: #E1E5E9;
  padding-block: 48px 0;
  padding-inline: 32px;
  text-align: right;
  border-radius: 8px 8px 0 0;
}

/* 
.screen-last {
  min-height: 32px;
  font-size: var(--fs-40px);
}

.screen-current {
  min-height: 64px;
  font-weight: 100;
  font-size: var(--fs-40px);
} */

.screen-display #display {
  background-color: var(--screen-clr);
  /* font-size: var(--fs-40px); */
  font-size: 60px;
  color: #E1E5E9;
  width: 100%;
  text-align: right;
  word-wrap: break-word;
  word-break: break-all;
}

/* .input-keys .row .stretch {
  width: 120px;
  border-radius: 30px;
  text-align: start;
  padding-left: 22px;
} */

.input-keys .operator {
  background-color: var(--btn-clr-operator);
}

.input-keys .operator:hover {
  background-color: var(--btn-clr-operator-hover);
}

.input-keys .setmod {
  background-color: var(--btn-clr-mod);
}

.input-keys .setmod:hover {
  background-color: var(--btn-clr-mod-hover);
}