:root {
    --strong-cyan: hsl(172, 67%, 45%);
    --very-dark-cyan: hsl(183, 100%, 15%);
    --dark-grayish-cyan: hsl(186, 14%, 43%);
    --grayish-cyan: hsl(184, 14%, 56%);
    --light-grayish-cyan: hsl(185, 41%, 84%);
    --very-light-grayish-cyan: hsl(189, 41%, 97%);
    --white: hsl(0, 0%, 100%);
}
  
body,
h1,
h2,
h3,
h4,
figure,
p,
blockquote,
dl,
dd {
    margin: 0;
}
  
.main-message-container {
    font-size: 0.7rem;
    line-height: 1.2;
    display: flex;
    margin: auto;
    justify-content: center;
    color: var(--very-dark-cyan);
    margin-top: 1rem;
}

.main-message-container h1 {
    text-align: center;
}
  
.main-message {
    margin-top: 5vh;
    letter-spacing: 0.4rem
}
  
body {
    max-height: 100vh;
    background-color: var(--light-grayish-cyan);
    font-family: "Space Mono";
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}
  
.calc-container {
    margin-top: 5vh;
    margin-bottom: 10vh;
    background-color: var(--white);
    gap: 2rem;
    row-gap: 1rem;
    padding: 2rem;
    display: grid;
    border-radius: 1rem;
    grid-template-rows: [row1-start] 6rem [row1-end row2-start] 6rem [row2-end row3-start] 6rem [row3-end];
    grid-template-columns: repeat(2, 20rem);
}

.bill-container {
    display: flex;
    grid-row-start: 1;
    grid-row-end: 2;
    grid-column-start: 1;
    grid-column-end: 2;
}
  
.bill-message {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: baseline;
}
  
.bill-message > h3 {
    padding-bottom: 0.3rem;
    font-size: 0.8rem;
    color: var(--dark-grayish-cyan);
}
  
.input-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
  
.input-content > h3 {
    padding-bottom: 0.3rem;
    font-size: 0.8rem;
    color: var(--dark-grayish-cyan);
}
  
.input-content > input {
    color: var(--grayish-cyan);
}
  
  
  
.people-headers {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
}
  
.invisible {
    color: var(--white) !important;
}
  
.people-headers > h3 {
    padding-bottom: 0.3rem;
    font-size: 0.8rem;
    color: var(--dark-grayish-cyan);
}
  
#error-message {
    text-align: right;
}
  
.visible {
    color: red !important;
}
  
.error-display {
    outline: red auto 1rem !important;
    caret-color: red !important;
}
  
  /*.input-content > input {
    border-radius: .5rem .5rem .5rem .5rem;
    border: 0;
    background-color: var(--very-light-grayish-cyan);
    height: 33%;
  }*/
  
.input-container {
    position: relative;
    display: flex;
    border-radius: .5rem .5rem .5rem .5rem;
    border: 0;
    height: 33%;
}
  
  
.input-container > img {
    height: 1rem;
    position: absolute;
    left: 0.8rem;
    bottom: 0.1rem;
    z-index: 1;
}
  
.input-container > input {
    height: 1rem;
    color: var(--grayish-cyan);
    padding: 0.9rem;
    font-size: 1.5rem;
    font-family: "Space Mono";
    text-align: right;
    border: 0;
    width: 100%;
    background-color: var(--very-light-grayish-cyan);
    border-radius: .5rem .5rem .5rem .5rem;
    cursor: pointer;
    caret-color: var(--strong-cyan);
}
  
.input-container > input:focus-visible {
    outline: var(--strong-cyan) auto 1rem;
}
  
.input-container > input:hover {
    outline: var(--strong-cyan) auto 1rem;
}
  
.tip-buttons {
    display: grid;
    gap: 0.7rem;
    grid-template-rows: [row1-start] 2.5rem [row1-end row2-start] 2.5rem [row2-end];
    grid-template-columns: repeat(3, 6rem);
}
  
.tip-buttons > button {
    font-family: "Space Mono";
    font-size: 1.1rem;
    background-color: var(--very-dark-cyan);
    border-radius: 0.4rem 0.4rem 0.4rem 0.4rem;
    border: 0;
    color: var(--white);
    cursor: pointer;
}
  
.tip-buttons > button:hover {
    filter: brightness(1.1);
    background-color: var(--light-grayish-cyan);
    color: var(--very-dark-cyan);
}
  
.mobile-tip-buttons:focus-visible {
    background-color: var(--strong-cyan);
}
  
#custom-input {
    display: block;
    font-size: 1.1rem;
    text-align: right;
    border: 0;
    font-family: 'Space Mono';
    padding: 0.3rem;
    background-color: var(--very-light-grayish-cyan);
    caret-color: var(--strong-cyan);
    cursor: pointer;
}
  
input::first-letter {
    letter-spacing: 1rem !important;
}
  
#custom-input:focus-visible {
    outline: var(--strong-cyan) auto 1rem;
}
  
#custom-input::placeholder {
    color: var(--very-dark-cyan);
    text-align: center;
}
  
#custom-input:hover {
    outline: var(--strong-cyan) auto 1rem;
}
  
.result-content {
    display: flex;
    flex-direction: row;
    margin-bottom: 2rem;
}
  
.per-person-message {
    font-size: 0.8rem;
    color: var(--grayish-cyan);
}
  
.message-container {
    display: flex;
    flex-direction: column;
}
  
.result-message {
    font-size: 1.25rem;
    color: var(--white);
    width: 50%;
}
  
.result-display {
    font-size: 1.5rem;
    color: var(--strong-cyan);
    flex-grow: 1;
    text-align: right;
}
  
.button-container {
    position: absolute;
    bottom: 0;
    left: 0;
    margin: 2rem;
    position: absolute;
    left: 0;
    bottom: 0;
    right: 0;
    max-width: inherit;
    margin: 2rem;
}
  
.shake {
    animation: shake 0.82s cubic-bezier(.36,.07,.19,.97) both;
}
  
@keyframes shake {
    10%, 90% {
      transform: translate3d(-.1rem, 0, 0);
    }
    20%, 80% {
      transform: translate3d(.1rem, 0, 0);
    }
    30%, 50%, 70% {
      transform: translate3d(-.1rem, 0, 0);
    }
    40%, 60% {
      transform: translate3d(.1rem, 0, 0);
    }
}
  
.button-container > button {
    opacity: 0.4;
    font-family: "Space Mono";
    font-size: 1rem;
    width: 100%;
    border: 0;
    background-color: var(--strong-cyan);
    color: var(--dark-grayish-cyan);
    border-radius: 0.2rem 0.2rem 0.2rem 0.2rem;
    padding: 0.5rem;
    cursor: pointer;
}
  
.button-container > button:hover {
    filter: brightness(1.1);
    opacity: 1;
    background-color: var(--strong-cyan);
    color: var(--very-dark-cyan);
}
  
.result-container {
    border-radius: 0.5rem;
    background-color: var(--very-dark-cyan);
    position: relative;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    grid-row-start: 1;
    grid-row-end: 4;
    grid-column-start: 2;
    grid-column-end: 3;
}
  

@media only screen and (max-width: 990px) {

    .main-message-container {
        margin-top: 4rem;
    }

    body {
        min-height: 100vh;
        max-height: 135vh;
    }
    
    .calc-container {
        display: flex;
        flex-direction: column;
        padding: 2.5rem;
        gap: 1rem;
    }

    .bill-container,
    .tip-container,
    .people-container,
    .result-container {
        margin-bottom: 1rem;
    }

    .bill-container,
    .tip-container,
    .people-container {
        grid-template-columns: 1fr;
    }

    .result-container {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .result-content {
        margin-bottom: 1rem;
    }

    .input-container > img {
        bottom: 0.9rem;
    }

    .button-container {
        position: relative;
        margin: 0;
      }
    
    .button-container > button {
        background-color: var(--strong-cyan);
        color: var(--very-dark-cyan);
        opacity: 1;
    }

    .tip-container {
        margin-bottom: 0.5rem;
    }

    .tip-buttons {
        gap: 0.8rem;
        grid-template-rows: [row1-start] 2.8rem [row1-end row2-start] 2.8rem [row2-end row3-start] 2.8rem [row3-end];
        grid-template-columns: repeat(2, 9rem);
        row-gap: 0.5rem;
        column-gap: 1rem;
    }

    .attribution {
        margin-bottom: 2rem;
    }
}