:root {
    /* colors */
    --color-primary: #336699;
    --color-secondary: #86BBD8;
    --color-tertiary: #721c24;
    --color-tertiary-light: #f8d7da;
    /* font */
    --main-font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; 
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 62.5%;
}

body {
    min-height: 100vh;
    font-family: var(--main-font-stack);
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--color-secondary);
    padding: 2rem;
    line-height: 1.5;
}

.container {
    position: relative;
    width: 73rem;
    min-height: 45rem;
    overflow: hidden;
    border-radius: 8px;
}

/* heading */
.heading {
    background-color: var(--color-primary);
    padding: 1rem;
    text-align: center;
}

.heading h1 {
    font-size: 2.8rem;
    font-weight: 600;
    color: white;
}

/* main content */
.main {
    background-color: white;
    padding: 3rem;
}

/* error messages */
.error-messages {
    position: relative;
    color: var(--color-tertiary);
    background-color: var(--color-tertiary-light);
    padding: 1.3rem;
    border-radius: 4px;
    border: 1px solid #f5c6cb;
    text-align: center;
    font-size: 1.6rem;
    margin-bottom: 2rem;
}

.close {
    position: absolute;
    top: 4px;
    right: 1.2rem;
    cursor: pointer;
    font-size: 1.3rem;
}

/* entry */
.entry-row:not(:first-child) {
    margin: 2rem 0;
}

h3 {
    font-size: 2rem;
    font-weight: 500;
}

.entry {
    display: flex;
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.icon-box {
    width: 4.5rem;
    text-align: center;
    padding: 1rem;
    font-size: 1.6rem;
    font-weight: 700;
    background-color: var(--color-primary);
    color: white;
}

.icon-box i {
    padding-top: 4px;
}

.input {
    display: block;
    width: 100%;
    outline: 0;
    border: 1px solid var(--color-gray-dark);
    padding: 1rem;
    font-size: 1.7rem;
    border: 1px solid rgb(189, 189, 189);
    height: 4.5rem;
}

select {
    width: 100%;
    margin-top: 8px;
}

input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}

.btn {
    margin: 3rem auto 0;
    width: 70%;
    background-color: var(--color-primary);
    color: white;
    border-radius: 3px;
    font-size: 1.9rem;
    border: 0;
    outline: 0;
    padding: 1.4rem 2.5rem;
    cursor: pointer;
}

/* loading bars */
.loading-bars {
    display: block;
    text-align: center;
    margin: 5rem;
}

.loading-bar {
    display: inline-block;
    background-color: var(--color-primary);
    width: 2.5rem;
    height: 10rem;
    margin: 0 1rem;
    animation: loadingbars .7s ease-in-out infinite;
}

.bar-1 {animation-delay: 0.1s;}
.bar-2 {animation-delay: 0.2s;}
.bar-3 {animation-delay: 0.3s;}

/* results */
.results {
    text-align: center;
    margin: 2rem;
    font-size: 2.7rem;
}

/* hidden elements */
.btn {display: none;}
.error-messages {display: none;}
.error-message {display: none;}
.loading-bars {display: none;}

/* displays */
.show {display: block;}


@keyframes loadingbars {
    0% {
        transform: scaleY(1)
    }

    50% {
        transform: scaleY(1.2)
    }

    100% {
        transform: scaleY(1)
    }
}