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*,
*::after,
*::before {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
font-size: 16px;
line-height: 1.618;
display: flex;
flex-flow: column nowrap;
min-height: 100vh;
}
.header,
.main,
.footer {
width: min(calc(100vw - 2rem), 350px);
margin-left: auto;
margin-right: auto;
}
.header,
.main {
border: 3px solid hsl(219, 64%, 35%);
border-radius: 5px;
box-shadow: 2px 2px 0 0 hsl(219, 64%, 35%), 2px 2px 2px 0 hsl(219, 64%, 30%),
3px 3px 3px 0 hsla(219, 64%, 25%, 0.65);
}
.header {
background: hsl(219, 64%, 35%);
border-bottom-left-radius: 0;
border-bottom-right-radius: 0;
color: hsl(0, 0%, 100%);
margin-top: 2rem;
padding: 0.5rem 1rem;
}
.branding {
font-size: 1.5rem;
font-variant: small-caps;
letter-spacing: 1px;
text-align: center;
text-shadow: 1px 1px 0 hsl(0, 0%, 65%), 2px 2px 2px hsl(0, 0%, 0%);
}
.main {
background: hsl(0, 0%, 97%);
border-top-left-radius: 0;
border-top-right-radius: 0;
margin-bottom: 1rem;
}
.footer {
font-size: 0.9rem;
text-align: center;
margin-top: auto;
padding: 1rem 0;
}
.calculator {
padding: 1rem;
}
.calculator__display {
background: hsl(0, 0%, 100%);
border: 1px solid hsl(0, 0%, 60%);
border-radius: 2px;
box-shadow: inset 0 0 2px 0 hsl(0, 0%, 70%), 0 0 0 1px hsl(0, 0%, 75%);
font-size: clamp(2rem, 3vw, 2.5rem);
font-weight: 600;
text-align: right;
width: 100%;
margin-bottom: 1rem;
padding: 0.2rem 1rem;
}
.calculator__entry-pad {
display: grid;
grid-template-columns: repeat(4, 1fr);
grid-template-rows: 1fr 6fr;
gap: 1rem;
justify-items: end;
}
.calculator__clear {
grid-column: 3 / 5;
grid-row: 1;
display: flex;
flex-flow: row nowrap;
justify-content: flex-end;
gap: 1rem;
}
.calculator__digits {
grid-column: 1 / 4;
grid-row: 2;
display: grid;
grid-template-columns: repeat(3, minmax(0, 1fr));
gap: 1rem;
}
.calculator__operations {
grid-column: 4;
grid-row: 2;
display: flex;
flex-flow: column nowrap;
gap: 1rem;
}
.btn {
display: block;
padding: clamp(0.1rem, 5vw, 0.3rem) clamp(1rem, 6vw, 1.5rem);
background: hsl(0, 0%, 95%);
border: 1px solid hsl(0, 0%, 85%);
border-radius: 3px;
box-shadow: 0 0 2px hsl(0, 0%, 80%), 0 0 0 2px hsl(0, 0%, 60%),
1px 1px 0 3px hsl(0, 0%, 50%);
font-family: inherit;
font-size: inherit;
line-height: inherit;
cursor: pointer;
transition: all 0.15s ease-in-out 0s;
}
.btn:hover,
.btn:focus {
background: hsl(0, 0%, 100%);
}
.btn:focus {
outline: 3px solid hsl(219, 64%, 35%);
}
.btn:active {
background: hsl(0, 0%, 90%);
box-shadow: 0 0 0 hsl(0, 0%, 80%), 0 0 0 2px hsl(0, 0%, 80%),
0 0 0 3px hsl(0, 0%, 50%);
outline: none;
transform: translateX(2px) translateY(2px) scale(0.96);
}
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