body {
  background-color: #f5f5f5;
  margin: 0px;
  min-height: 100vh;
}
.topnav {
  background-color: #415a77;
  overflow: hidden;
  height: 11.5vh;
}

.links a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

/* Change the color of links on hover */
.links a:hover {
  background-color: #1b263b;
  color: #778da9;
}

/* Add a color to the active/current link */
.links a.active {
  background-color: #0d1b2a;
  color: white;
}

.links {
  display: flex;
  justify-content: center;
  align-items: center;
}
.logo {
  display: flex;
  justify-content: center;
  align-items: center;
}
.logo a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.todo {
  width: 33%;
  border: 1px solid #778da9;
  min-height: 40vh;
  max-height: 80vh;
  border-radius: 15px;
  padding: 20px;
  /* box-shadow: 0 10px 0px rgba(0, 0, 0, 0.1); */
  box-shadow:
    rgba(50, 50, 93, 0.25) 0px 13px 10px -5px,
    rgba(0, 0, 0, 0.3) 0px 8px 16px -8px;
  z-index: 100;
  overflow-y: scroll;
}

.inProgress {
  width: 33%;
  border: 1px solid #778da9;
  min-height: 40vh;
  max-height: 80vh;
  border-radius: 15px;
  padding: 20px;
  box-shadow:
    rgba(50, 50, 93, 0.25) 0px 13px 10px -5px,
    rgba(0, 0, 0, 0.3) 0px 8px 16px -8px;
  z-index: 100;
  overflow-y: scroll;
}
.complete {
  width: 33%;
  border: 1px solid #778da9;
  min-height: 40vh;
  max-height: 80vh;
  border-radius: 15px;
  padding: 20px;
  box-shadow:
    rgba(50, 50, 93, 0.25) 0px 13px 10px -5px,
    rgba(0, 0, 0, 0.3) 0px 8px 16px -8px;
  z-index: 100;
  overflow-y: scroll;
}

.main {
  display: flex;
  padding: 10px 50px 10px 50px;
  height: 100%;
  background-color: #f5f5f5;
  min-height: 40vh;
  max-height: 88.5vh;
}
#popup {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: white;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}
#popup:target {
  display: block;
}
#overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
}
#popup:target + #overlay {
  display: block;
}

.category_title {
  text-align: center;
}

.task_item {
  border-radius: 10px;
  border: 1px solid #778da9;
  padding-top: 10px;
  padding-bottom: 10px;
  padding: 20px;
  box-shadow: 0 4px 2px rgba(0, 0, 0, 0.15);
  z-index: 200;
  margin-bottom: 5px;
}

.task_title {
  font-size: 24px;
  padding-left: 10px;
  text-align: center;
  width 80%;
}

.task_buttons_right {
  float: right;
}
.task_buttons_left {
  float: left;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.fa {
  font-size: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
}

button {
  z-index: 300;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}