:root {
    --background-color: rgb(240, 239, 234);                 /* Contrast ratio vs black: 18 */
    --main-button-color: rgb(44, 119, 166);                 /* Contrast ratio vs white font: 4.8 */
    --dark-main-button-color: rgb(31, 96, 136);              /* Contrast ratio vs white font: 6.8 */
    --secondary-button-color: rgb(109, 106, 106);           /* Contrast ratio vs white font: 4.9 */
    --dark-secondary-button-color: rgb(81, 77, 77);         /* Contrast ratio vs white font: 8.3 */
    --third-color: rgb(225, 225, 225);                      /* Contrast ratio vs black font: 16 */
    --warning-color: rgba(228, 175, 175, 0.816);            /* Contrast ratio vs white font: 9.9 */
    --light-font: white;
    --dark-font: black;
    --border-color: rgb(95, 92, 92);
}

body {
    margin: 1em;
    background-color: var(--background-color);
    font-family: Verdana, sans-serif;
    font-size: 1.3em;
}

button {
    font-size: inherit;
    padding: 5px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    display: inline-block; 
    background-color: var(--main-button-color);   
    color: var(--light-font);
    width: 150px;
}

button:not(#repeat), .alert {
    margin: 5px;
}

button:hover {
    background-color: var(--dark-main-button-color);
}

#filter-title {
    background-color: var(--secondary-button-color);
}

#filter-title:hover {
    background-color: var(--dark-secondary-button-color);
}

#logout {
    background-color: var(--background-color);
    color: var(--dark-secondary-button-color);
}

#logout:hover {
    background-color: var(--third-color);
}

a {
    text-decoration: none;
    color: var(--dark-font);
}

#idea {
    text-align: center;
    margin: 1em auto;
    min-height: 3em;
    display: table;
}

#idea-alert {
    display: none;
}

#filter-title {
    display: block;
}

#filters {
    display: none;
    margin-left: 1rem;
}

input[type="checkbox"] {
    transform: scale(1.5);
    margin-bottom: 5px;
    accent-color: var(--main-button-color);
}

input[type="checkbox"]:first-of-type {
    margin-top: 7px;
}

input[type="checkbox"]:last-of-type {
    margin-bottom: 7px;
}

input[type="text"], input[type="password"] {
    font-size: inherit;
}

form {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
} /* Inspired by https://stackoverflow.com/questions/66767802/ */

form label {
    margin: 4px;
}

#reset-button {
    display: none;
}

.alert {
    display: table;   /* Thanks to https://stackoverflow.com/questions/14310154/ */
    background-color: var(--warning-color);
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid var(--warning-color);
    border-radius: 5px;
}