@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,700;1,400;1,700&display=swap");

/* VARIABLES */

:root {
  --primary-color: #333;
}

/* MAIN ELEMENTS */

body {
  font-size: 14px;
  font-family: Arial, Helvetica, sans-serif;
  padding: 80px 0;
}

main {
  margin: 0px auto;
  display: flex;
  flex-direction: row;
  gap: 30px;
  width: 70vw;
}

main > section {
  padding: 40px 50px;
  border-radius: 10px;
  background: #f9f9f9;
  border: 1px solid #e9e9e9;
  box-shadow: 0 0 8px 3px #f9f9f9;
}

h1 {
  font-size: 30px;
}

h1,
h1 a,
h2,
h3,
h4 {
  font-family: "JetBrains Mono" !important;
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* NAV */

nav {
  text-align: center;
  margin: 0 0 60px 0;
}

main > section > div {
  margin-bottom: 30px;
}

main > section > div:last-child {
  margin-bottom: 0;
}

a {
  color: #6c5ce7;
  text-decoration: none;
}

a:hover {
  border-bottom: 2px solid #6c5ce7;
}

input[type="text"],
input[type="button"] {
  padding: 7px 10px;
  border: 1px solid #aaa;
  border-radius: 3px;
}

input:hover {
  border: 1px solid var(--primary-color);
}

/* ADD TASKS */

#add-task {
  display: flex;
  flex-direction: row;
  gap: 8px;
}

#add-task input[type="text"] {
  flex-grow: 1;
}

/* DESCRIPTION */

#description {
  line-height: 23px;
}

/* CHECKBOXES */

.checkbox-group {
  display: flex;
  flex-direction: row;
  gap: 8px;
  margin-bottom: 10px;
  cursor: pointer;
}

.checkbox {
  height: 20px;
  width: 20px;
  border: 1px solid var(--primary-color);
  border-radius: 3px;
  padding: 3px;
  opacity: 0.5;
  flex-shrink: 0;
}

.checkbox-group:hover .checkbox {
  opacity: 1;
}

.checkbox::after {
  content: "";
  display: block;
  height: 100%;
  width: 100%;
  border-radius: 2px;
}

.checkbox.half::after {
  background: linear-gradient(
    135deg,
    var(--primary-color) 50%,
    transparent 50%
  );
}

.checkbox.full::after {
  background: var(--primary-color);
}

.checkbox-group label {
  cursor: pointer;
  user-select: none;
}

/* FOOTER */

footer {
  background: #f9f9f9;
  position: fixed;
  bottom: 0;
  text-align: center;
  width: 100vw;
  padding: 10px 0;
}

/* MOBILE & SMALL SCREENS */

@media (max-width: 1000px) {
  main {
    flex-direction: column;
  }
  #add-task {
    flex-wrap: wrap;
  }
}