:root {
  --bg: #fff;
  --card: #f4f7fd;
  --text: #000;
  --highlight: rgb(107, 15, 150);
}
body.dark {
  --bg: #20212c;
  --card: #2b2c37;
  --text: #fff;
}
body {
  margin: 0;
  font-family: sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}
aside {
  width: 220px;
  background: var(--card);
  padding: 1rem;
  display: flex;
  flex-direction: column;
}
#sidebar h2 {
  font-size: 1.5em;
  margin: 0;
}
#allBoardsCount {
  font-size: 0.9em;
  color: gray;
  margin-bottom: 1rem;
  display: block;
}
aside ul {
  list-style: none;
  padding: 0;
}
aside li {
  padding: 10px;
  cursor: pointer;
  border-radius: 5px;
}
aside li:hover {
  background:rgb(107, 15, 150);
  color: white;
  border-top-right-radius: 15px;
  border-bottom-right-radius: 15px;
}
.bottom {
  margin-top: auto;
}
.switch input { display: none; }
.slider {
  width: 40px; height: 20px;
  background:rgb(107, 15, 150);
  border-radius: 20px;
  display: inline-block;
  position: relative;
}
.slider::before {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  left: 1px; top: 1px;
  background: #fff;
  border-radius: 50%;
  transition: 0.4s;
}
input:checked + .slider::before { transform: translateX(20px); }
#hideSidebar, #showSidebar {
  margin-top: 10px;
  background: #888;
  color: white;
  border: none;
  padding: 8px;
  cursor: pointer;
  border-radius: 5px;
}
#showSidebar {
  position: fixed; bottom: 10px; left: 10px;
}
main {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.header {
  padding: 1rem;
  display: flex;
  justify-content: space-between;
}
#addTaskBtn, #editBoardBtn {
  background: rgb(107, 15, 150);
  color: white;
  padding: 6px 14px;
  border: none;
 border-bottom-right-radius: 15px;
 border-bottom-left-radius: 15px;
 border-top-left-radius: 15px;
 border-top-right-radius: 15px;
  cursor: pointer;
  margin-left: 8px;
}
#editBoardBtn {
  background: transparent;
  color: var(--text);
}
#editBoardBtn:hover {
  color: var(--highlight);
}
.board {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  overflow-x: auto;
}
.column {
  background: var(--card);
  padding: 1rem;
  min-width: 200px;
  border-radius: 8px;
  flex: 0 0 auto;
}
.tasks .task {
  background: var(--bg);
  margin: 5px 0;
  padding: 8px;
  border-radius: 4px;
  cursor: grab;
}
.add-column button {
  background:var(--bg);
  color:var(--text);
  padding: 20px;
  cursor: pointer;
  border-radius: 8px;
}
.modal {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center;
  justify-content: center;
}
.modal-content {
  background: var(--card);
  padding: 2rem;
  border-radius: 8px;
}
.modal-content input, .modal-content select, .modal-content button {
  margin-top: 10px; width: 100%; padding: 8px;
}
aside.collapsed {
  width: 0; padding: 0; overflow: hidden;
}