/* Color palettes */
.todo-app {
    --primary-color: #00003D;
    --secondary-color: #92BCEA;
    --tertiary-color: #F4F4F4;
    --background-color: #F4F4F4;
    --text-color: #333;
    --text-secondary-color: #555;
    --text-muted-color: #666;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --hover-color: #84a8d1;

    /* Fonts */
    --font-size-category: 1rem;
    
    --pill-border-thickness: 3px;
    --pill-border-color: #ddd;
    --pill-fill-color: #F4F4F4;
    --accessory-color: #00003D;

    max-width: 1200px;
    min-height: 0;
    margin: auto;
    padding: var(--padding-medium);
    border-radius: 32px;
    background-color: var(--background-color);
    box-shadow: 0 4px 10px var(--shadow-color);
    display: flex;
    flex-direction: column;

    overflow: hidden;
}

/* Halloween palette */
.todo-app.palette-halloween {
    --primary-color: #f9ea9a;
    --secondary-color: #f4442e;
    --tertiary-color: #f9ea9a;
    --background-color: #1a1a1a;
    --border-color: #efd79b;
    --shadow-color: rgba(0,0,0,0.5);
    --text-color: #fbfffc;
    --text-secondary-color: #fbfffc;
    --pill-border-color: #ff9b3e;
    --pill-fill-color: #ff7037;
    --accessory-color: #1a1a1a;
}

.todo-app #greeting {
  margin-top: 0;
  padding-top: 0;
}

/* Grid / Categories */
.todo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--gap-medium);
  justify-content: center;
  margin-top: var(--margin-medium);
  padding: var(--padding-small);
  padding-top: 0;
}

.category {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--pill-fill-color);
  border: var(--pill-border-thickness) solid var(--pill-border-color);
  border-radius: 16px;
  padding: var(--padding-medium);
  box-shadow: 0 2px 5px var(--shadow-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  min-width: 180px;
  height: 100%;
}

.category:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 10px var(--shadow-color);
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--secondary-color);
  padding-bottom: 0.25rem;
  margin-bottom: 0.5rem;
}

.category-header h2 {
  margin: 0;
  font-family: var(--font-primary);
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  border-bottom: none;
  padding-bottom: 0;
}

.category-header .count {
  font-size: var(--font-size-body);
  color: var(--text-secondary-color);
  font-weight: normal;
}

.category {
  cursor: pointer;
  transition: all 0.2s ease;
  opacity: 0.9;
}

.category:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 10px var(--shadow-color);
  opacity: 1;
}

/* Active state */
.category.active {
  background-color: var(--secondary-color);
  border-color: var(--primary-color);
  color: var(--tertiary-color);
  opacity: 1;
}

.category.active .category-header h2,
.category.active .count {
  color: var(--tertiary-color);
}

/* Add Button */
.category p {
  font-family: var(--font-secondary);
  font-size: var(--font-size-body);
  color: var(--text-secondary-color);
  margin-bottom: var(--margin-medium);
  flex-grow: 1;
}

.circle-add {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.circle-add-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--accessory-color);
  background-color: var(--pill-fill-color);
  color: var(--accessory-color);
  font-size: 20px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
  box-sizing: border-box;
}

.circle-add-btn:hover {
  background-color: var(--accessory-color);
  color: var(--tertiary-color);
}

/* Add Pill */
.pill-add {
  display: flex;
  align-items: center;
  background-color: var(--pill-fill-color);
  border-radius: 50px;
  border: var(--pill-border-thickness) dashed var(--pill-border-color);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  padding: 0.5rem 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pill-add:hover {
  transform: translate3d(0, -2px, 0);
  box-shadow: 0 3px 6px rgba(0,0,0,0.15);
}

/* Tasks */
#todo-list {
  list-style: none;
  padding: 0;
  margin: var(--margin-medium) 0;
  margin-bottom: 0;
}

#todo-list li {
  justify-content: center;
  list-style: none;
  margin-bottom: var(--margin-small);
}

.add-todo-item {
  margin-bottom: var(--margin-small);
}

.pill-container {
  display: flex;
  align-items: center;
  background-color: var(--pill-fill-color);
  border-radius: 50px;
  border: var(--pill-border-thickness) solid var(--pill-border-color);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  padding: 0.5rem 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pill-container:hover {
  transform: translate3d(0, -2px, 0);
  box-shadow: 0 3px 6px rgba(0,0,0,0.15);
}

.circle-checkbox {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.circle-checkbox input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  pointer-events: all;
}

.circle-checkbox .checkmark {
  width: 30px;
  height: 30px;
  border: 2px solid var(--accessory-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-sizing: border-box;
}

.circle-checkbox .checkmark::after {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--accessory-color);
  transform: scale(0);
  transition: transform 0.12s ease;
}

.circle-checkbox input:checked + .checkmark::after {
  transform: scale(1);
}

.task-wrapper {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  width: 100%;
}

.task-wrapper .todo-due {
  font-size: 0.8rem;
  color: var(--text-secondary-color);
  margin: 0.25rem;
}

.task-wrapper input[type="text"] {
  border: none;
  background: transparent;
  font-size: var(--font-size-body);
  color: var(--text-color);
  width: 100%;
  padding: 0;
  margin: 0;
}

#todo-list li button:not(.circle-add-btn) {
  background: none;
  border: none;
  color: var(--checkbox-color);
  cursor: pointer;
  font-weight: bold;
  font-size: 1rem;
  padding: 0 0.5rem;
}

/* Media Queries */

/* Laptops/Desktops */
@media screen and (min-width: 960px) and (max-width: 1439px) {
    
}

/* Tablets */
@media screen and (min-width: 600px) and (max-width: 959px) {
    
}

/* Phones */
@media screen and (max-width: 599px) {
  .category-header h2 {
    font-size: var(--font-size-category);
  }

  .todo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--gap-small);
  }

  .category {
    text-align: center;
    padding: var(--padding-small);
    border-radius: var(--border-radius + 16px);
    box-shadow: 0 2px 5px var(--shadow-color);
    min-width: 140px;
  }
}