:root {
  --surface-bg: #f7f9fa;
  --card-bg: #ffffff;
  --task-bg: #ccd0cf;

  --text-primary: #06141b;
  --text-secondary: #253745;
  --text-tertiary: #4a5c6a;

  --accent-todo: #d0e7ff;
  --accent-progress: #fff6cc;
  --accent-complete: #d2f8d2;

  --danger: #f85149;
  --grid-line: rgba(0, 0, 0, 0.05);
  --shadow-md: 1px 3px 6px rgba(0, 0, 0, 0.1);
  --glow-shadow: 0 0 1px rgb(1, 16, 32);
}

:root.dark {
  /* Backgrounds */
  --surface-bg: #1e1e2f;
  --card-bg: #2a2a40;
  --task-bg: #33334d;

  /* Text */
  --text-primary: #f4f4f8;
  --text-secondary: #c0c4cc;
  --text-tertiary: #888ca1;

  /* Accent Colors */
  --accent-todo: #4a90e2;
  --accent-progress: #f5a623;
  --accent-complete: #2ecc71;

  --danger: #ff5c5c;

  --grid-line: rgba(255, 255, 255, 0.03);
  --shadow-md: 0 3px 6px rgba(0, 0, 0, 0.2);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background 0.2s ease, color 0.2s ease, border 0.2s ease;
}

body {
  background: var(--card-bg);
  font-family: "Inter", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.grid {
  background-image: linear-gradient(
      to right,
      var(--grid-line) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 20px 20px;
}

.main {
  margin: 1rem;
  color: var(--text-primary);
  position: sticky;
  top: 1rem;
  left: 0;
  display: flex;
  justify-content: space-between;
}
.main > h1 {
  text-shadow: var(--shadow-md);
}

.column {
  border-radius: 6px;
  padding: 1rem;
  margin: 0.5rem;
}

.column-container {
  margin: 0px 1vw;
  display: grid;
  /* grid-template-columns: auto auto auto; */
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  grid-template-rows: auto;
  gap: 1rem;
  height: 90vh;
  overflow: hidden;
}

.column-head {
  display: flex;
  justify-content: space-between;
  margin: 0.5rem;
  color: var(--text-secondary);
}

.btn {
  width: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.btn:hover {
  transform: scale(1.5) rotate(15deg);
  transition: transform 0.2s ease;
  border: none;
}
.icon-btns .bi {
  font-size: 1rem;
}
.bi {
  color: var(--text-primary);
  display: inline-block;
}

.icon-btns {
  margin-right: 1vw;
  padding: 0.5rem;
}
.column-head .bi {
  font-size: 1.5rem;
}
.task {
  margin: 0.5rem;
  padding: 5px;
  cursor: grab;
  border-radius: 4px;
  border: 0.5px solid var(--surface-bg);
  box-shadow: var(--shadow-md);
}

.task-input {
  width: 100%;
  resize: none;
  overflow: hidden;
  box-sizing: border-box;
  min-height: 2em;
  font: inherit;
  padding: 0.5em;
  border: none;
  outline: none;
  background: var(--card-bg);
  color: var(--text-secondary);
  border-radius: 4px;
  transition: height 0.2s ease;
}

.task-input:focus {
  outline: 1px solid var(--text-secondary);
}

menu {
  display: flex;
  justify-content: right;
}

.task .de-btn {
  padding: 3px;
  background: none;
}

.bi-trash {
  font-size: 0.8rem;
  color: var(--text-primary);
  background: none;
  border: none;
}

.dragging {
  opacity: 0.5;
}

.task:active {
  cursor: move;
}

.task:hover {
  box-shadow: var(--glow-shadow);
  border: 1px solid var(--text-secondary);
  transition: box-shadow 0.2s ease;
}

.task:hover .bi-trash {
  color: var(--danger);
}

.column:nth-of-type(1) .task {
  background: var(--accent-todo);
}

.column:nth-of-type(2) .task {
  background: var(--accent-progress);
}

.column:nth-of-type(3) .task {
  background: var(--accent-complete);
}

@media screen and (max-width: 530px) {
  .task-input {
    font-size: 0.8rem;
  }
  .column-container {
    grid-template-columns: 1fr;
    grid-auto-flow: row;
  }
}
@media (min-width: 900px) {
  .column-container {
    grid-template-columns: repeat(3, 1fr);
  }
}