:root {
  --primary-color: #6366f1;
  --secondary-color: #1e293b;
  --background-color: #0f172a;
  --text-color: #e2e8f0;
  --sub-text-color: #94a3b8;
  --input-bg: #1e293b;
  --input-focus: #6366f1;
  --button-bg: #6366f1;
  --button-hover: #4f46e5;
  --completed-opacity: 0.5;
  --completed-text-decoration: line-through;
  --filtres-bg: #1e293b;
  --filtres-hover-bg: #8c8c8d49;
  --clear-btn-bg: #dc1626;
  --clear-btn-hover-bg: #dc2626;
  --edit-btn-hover-color: rgba(99, 102, 241, 0.774);
  --del-btn-color: tomato;
  --del-btn-hover-color: rgba(180, 54, 54, 0.774);
}

/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* HTML */

html {
  scroll-behavior: smooth;
}

/* BODY */
body {
  font-family: 'Inter', sans-serif;
  background: radial-gradient(circle, var(--background-color), var(--input-bg));
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: start;
  min-height: 100vh;
  padding: 40px 20px;
}

/* CONTAINER */
.container {
  width: 100%;
  max-width: 600px;
}

/* HEADER */
.title {
  font-size: 2rem;
  font-weight: bold;
}

.sub-title {
  font-size: 0.9rem;
  color: var(--sub-text-color);
  margin-bottom: 20px;
}

/* INPUT */
.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

input {
  flex: 1;
  padding: 12px;
  border-radius: 10px;
  border: none;
  outline: none;
  background: var(--input-bg);
  color: var(--text-color);
}

input[type="text"]:hover {
  outline: 2px solid var(--primary-color);
}

input:focus {
  box-shadow: 0 0 0 2px var(--input-focus);
}

button {
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  background: var(--button-bg);
  color: var(--text-color);
  transition: 0.2s;
}

button:hover {
  background: var(--button-hover);
  transform: scale(1.05);
}

button:focus,
input:focus {
  outline: 2px solid var(--primary-color);
}

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding: 10px;
  background-color: var(--background-color);
  border: 1px solid var(--input-bg);
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1) inset;
}

.filtres {
  display: flex;
  gap: 10px;
}

.filtres button {
  background: var(--filtres-bg);
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease-in-out;
}

.filtres button::before {
  content: '';
  display: block;
  width: 0;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border-radius: 10px;
  background: var(--filtres-hover-bg);
  transition: width 0.3s ease-in-out;
}

.filtres button:hover::before,
button.active:hover::before {
  width: 100%;
}

.filtres button.active::before {
  width: 100%;
  border-right: 1px solid var(--primary-color);
}

#clearBtn {
  background: var(--clear-btn-bg);
  transition: all 0.3s ease;
}

#clearBtn:hover {
  background: var(--clear-btn-hover-bg);
}

#clearBtn:focus {
  outline: 2px solid var(--clear-btn-hover-bg);
}

.controls-task {
  display: none;
  transition: all 0.3s ease-in-out;
}

.controls-task.show {
  font-size: 0.9rem;
  margin-bottom: 10px;
  padding: 10px;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.controls-task .delBtnTaskCompleted,
.controls-task .delBtnTaskActive {
  background: var(--del-btn-color);
  color: #fff;
  padding: 5px 10px;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.controls-task .delBtnTaskCompleted:hover,
.controls-task .delBtnTaskActive:hover {
  background: var(--del-btn-hover-color);
  transform: scale(1.1);
}

.controls-task .delBtnTaskCompleted:focus,
.controls-task .delBtnTaskActive:focus {
  outline: 2px solid var(--del-btn-hover-color);
}

ul {
  list-style: none;
}

li {
  background: rgba(30, 41, 59, 0.8);
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  backdrop-filter: blur(10px);
  animation: fadeIn 0.3s ease;
}

li:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  transition: 0.3s;
}

li.dragging {
  opacity: 0.5;
  transform: scale(0.95) rotateZ(2deg);
  cursor: grabbing;
}

li:last-child {
  margin-bottom: 0;
}

li input[type="checkbox"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary-color);
  border-radius: 4px;
  background: transparent;
  z-index: 1;
  position: relative;
  cursor: pointer;
  user-select: none;
}

li input[type="checkbox"]:focus {
  outline: none;
}

li input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 6px;
  width: 5px;
  height: 10px;
  border: solid transparent;
  border-width: 0 2px 2px 0;
  transform: translate(2.5px, 0.2px) rotate(45deg);
}

li input[type="checkbox"]:checked::after {
  border-color: #fff;
}

li input[type="checkbox"]:checked {
  background: var(--primary-color);
}

li span {
  width: 100%;
  padding: 20px 10px;
  margin-left: 8px;
  margin-right: 5px;
  border-radius: 8px;
  background-color: var(--input-bg);
  text-align: left;
  z-index: 1;
  user-select: none;
  word-break: break-all;
  word-wrap: break-word;
}

li::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(to right, rgba(99, 102, 241, 0.3), rgba(99, 102, 241, 0.1));
  border-left: 2px solid rgba(99, 101, 241, 0.562);
  border-radius: 12px;
  opacity: 0;
  transition: width 0.3s ease-in-out, height 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

li:hover::before {
  width: calc(100% - 1px);
  height: 100%;
  opacity: 1;
}

/* COMPLETED */
.completed {
  text-decoration: var(--completed-text-decoration) var(--clear-btn-hover-bg, red) wavy;
  opacity: 0.5;
}

li.completed::before {
  background: linear-gradient(to right, rgba(239, 68, 68, 0.3), rgba(239, 68, 68, 0.1));
  border-left: 2px solid rgba(239, 68, 68, 0.562);
}

.drag-handle {
  width: 5px !important;
  height: 5px !important;
  position: fixed;
  left: -5px;
  top: -10px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
  border: none;
  border-radius: 0;
  background-color: transparent;
}

.drag-handle img {
  width: 20px;
  object-fit: contain;
}

.drag-handle img:hover {
  cursor: grab;
}

.drag-handle img:active {
  cursor: grabbing;
  opacity: 0.5;
}

.editBtn {
  padding: 5px 8px;
  background: transparent !important;
  font-size: 16px;
  z-index: 1;
  transition: all 0.3s ease-in-out;
}

.editBtn:hover {
  color: var(--button-hover);
  transform: scale(1.2) rotate(42deg);
}

.delBtn {
  color: var(--del-btn-color);
  padding: 5px 8px;
  background: transparent !important;
  font-size: 16px;
  z-index: 1;
}

.delBtn:hover {
  color: var(--del-btn-hover-color);
  transform: scale(1.2) rotate(45deg);
}

/* ANIMATIONS */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  50% {
    opacity: 0.5;
    transform: translateY(-5px);
  }

  100% {
    opacity: 0.2;
    transform: translateY(0);
  }
}

/* media queries */
@media (max-width: 540px) {
  .container {
    min-width: 100%;
  }

  .controls {
    justify-content: center !important;
    gap: 10px;
  }

  .filtres {
    gap: 30px;
  }

  .filtres button {
    padding: 0.8rem 0.98rem;
    font-size: 0.8rem;
  }

  #clearBtn {
    display: none;
  }

  li {
    position: relative;
  }


  li span {
    width: calc(100% - 100px);
    margin-left: 10px;
    margin-right: 50px;
    border: none !important;
    background-color: transparent !important;
  }

  li span[contenteditable="true"] {
    outline: 1px solid var(--primary-color);
  }

  li input[type="checkbox"] {
    margin-left: 20px;
  }

  .editBtn {
    display: none;
  }

  .drag-handle {
    width: 100px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2 !important;
    position: absolute;
    left: -5px;
    top: -5px;
  }

  .drag-handle img {
    transform: rotate(140deg);
  }

  .drag-handle:hover {
    cursor: grab;
  }

}

@media (max-width: 1024px) and (orientation: portrait)  {
  .controls {
    flex-direction: row;
    justify-content: space-between;
  }

  .controls #clearBtn {
    visibility: visible;
  }

  li span {
    width: calc(100% - 50px);
    margin-left: 10px;
    margin-right: 10px;
    border: none !important;
    background-color: transparent !important;
  }
}