style.css

/* Import fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap');

/* Root variables */
:root {
  /* Colors */
  --gradient: linear-gradient(180deg, rgba(45, 112, 253, 0.73) 0%, #163e92 100%);
  --dark: #001747;
  --grey: #b1bacb;
  --grey-border: rgba(210, 210, 210, 0.75);
  --grey-light: #eeeeee;
  --grey-dark: #405175;
  --blue: #2d70fd;
  --green: #00d8a7;
  --white: #ffffff;
  --text: black;
  --red: #ff4d4d;

  /* Layout */
  --border-radius: 0.5rem;
  --box-shadow: 0 1rem 3rem 1rem rgba(0, 23, 71, 0.15);
  --transition: all 0.3s ease;
  --transition-fast: all 0.2s ease;
  --gradient-1: rgba(45, 112, 253, 0.73);
  --gradient-2: #163e92;
  --gradient-3: #2d70fd;
  --gradient-4: #001747;
}

/* Dark mode styles */
body.dark-mode {
  --gradient: linear-gradient(180deg, #192734, #22364f);
  --dark: #ffffff;
  --grey: #6c757d;
  --grey-border: rgba(110, 110, 110, 0.75);
  --grey-light: #373f52;
  --grey-dark: #202c3d;
  --blue: #6bb1e1;
  --green: #00d8a7;
  --white: #1a1a1a;
  --text: white;
  --gradient-1: #192734;
  --gradient-2: #22364f;
  --gradient-3: #2c3e50;
  --gradient-4: #34495e;
}

/* Animations */
@keyframes gradientAnimation {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes float {
  0% { transform: translatey(0px); }
  50% { transform: translatey(-20px); }
  100% { transform: translatey(0px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { transform: scale(0.9); }
  to { transform: scale(1); }
}

/* Global styles */
body, h1, h2, h3, h4, h5, h6, p, ul {
  margin: 0;
  padding: 0;
}

body {
  background: var(--gradient);
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
  font-family: "Poppins", sans-serif;
  transition: background 0.5s ease-in-out, color 0.5s ease-in-out;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(-45deg, var(--gradient-1), var(--gradient-2), var(--gradient-3), var(--gradient-4));
  background-size: 400% 400%;
  animation: gradientAnimation 15s ease infinite;
  z-index: -2;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='40' fill='rgba(255,255,255,0.1)'/%3E%3C/svg%3E");
  background-size: 100px 100px;
  opacity: 0.5;
  z-index: -1;
  animation: float 6s ease-in-out infinite;
}

/* Typography */
h2 {
  text-transform: uppercase;
  height: 3rem;
  color: var(--dark);
  text-align: center;
}

/* Layout components */
.todo {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  border-radius: 2rem;
  background: var(--white);
  padding: 3rem;
  height: 50%;
  width: 60%;
  box-shadow: var(--box-shadow);
  max-width: 35rem;
  transition: var(--transition), transform 0.3s ease-in-out;
  animation: fadeIn 0.5s ease-out;
}

.todo:hover {
  transform: translateY(-5px);
  box-shadow: 0 1.5rem 4rem 1.5rem rgba(0, 23, 71, 0.2);
}

.header {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Form elements */
.input {
  position: relative;
  display: flex;
  margin-bottom: 1.5rem;
}

.input-field {
  width: 100%;
  border: 0.06rem solid var(--grey-border);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  font-size: 1rem;
  transition: var(--transition), transform 0.2s ease-in-out;
}

.input-field:focus {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-color: var(--blue);
  transform: scale(1.02);
}

input[type="text"]::placeholder {
  color: var(--grey);
}

/* Buttons */
.btn, .btn-delete, .counter-container button {
  cursor: pointer;
  border-radius: var(--border-radius);
  transition: var(--transition-fast), transform 0.2s ease-in-out;
  animation: scaleIn 0.3s ease-out;
}

.btn {
  color: var(--white);
  font-size: 1.1rem;
  padding: 0.7rem 1.5rem;
  background-color: var(--blue);
  border: none;
  position: absolute;
  right: 0.5rem;
  bottom: 0.5rem;
}

.btn-delete {
  background-color: var(--grey-light);
  color: var(--grey-dark);
  font-size: 0.9rem;
  padding: 0.4rem 0.8rem;
}

.btn:hover, .btn-delete:hover, .counter-container button:hover {
  opacity: 0.9;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.btn:active, .btn-delete:active, .counter-container button:active {
  transform: translateY(1px) scale(0.98);
}

.btn-delete:hover {
  background-color: var(--red);
  color: var(--white);
}

/* Todo list */
.todo-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
}

ul {
  overflow-y: scroll;
}

li {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  padding: 1.3rem;
  transition: var(--transition-fast);
  animation: fadeIn 0.3s ease-out;
}

li:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

#todoList p {
  display: flex;
  align-items: center;
  color: var(--dark);
  margin: 0;
  flex-grow: 1;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

#todoList .disabled {
  color: #8f98a8;
  text-decoration: line-through;
  transition: color 0.3s ease, text-decoration 0.3s ease;
}

/* Checkbox styles */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
}

input[type="checkbox"]::before {
  content: "\f00c";
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 2rem;
  height: 2rem;
  font-size: 1.2rem;
  border: 0.06rem solid var(--grey-border);
  border-radius: 50%;
  color: transparent;
  transition: var(--transition-fast), transform 0.2s ease-in-out;
}

input[type="checkbox"]:checked::before {
  color: var(--white);
  background-color: var(--green);
  border-color: var(--green);
  transform: scale(1.1);
}

input[type="checkbox"]:hover::before {
  border-color: var(--blue);
}

input[type="checkbox"]:focus {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* Counter styles */
.counter-container {
  height: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--grey);
}

.counter-container p {
  margin: 0;
}

.counter-container button {
  border: none;
  background-color: transparent;
  color: var(--grey);
  font-size: 1rem;
  padding: 0.5rem 1rem;
}

/* Footer styles */
footer {
  text-align: center;
  padding: 15px 0;
  background-color: var(--dark);
  color: var(--white);
  font-size: 0.9rem;
  position: fixed;
  bottom: 0;
  width: 100%;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

footer a {
  color: var(--blue);
  text-decoration: none;
  transition: var(--transition);
  font-weight: 600;
}

footer a:hover {
  color: var(--green);
  text-decoration: none;
}

footer i {
  margin-right: 5px;
  font-size: 1.1rem;
}

.made-by, .author {
  font-size: 0.9rem;
}

.made-by {
  color: var(--grey-dark);
}

.author {
  color: var(--blue);
  font-weight: bold;
}

.author a {
  color: var(--blue);
  font-weight: bold;
  text-decoration: none;
  transition: var(--transition);
}

.author a:hover {
  text-decoration: underline;
}

/* Scroll styles */
.scroll {
  overflow-y: auto;
  height: 15rem;
  scrollbar-width: thin;
  margin-bottom: 1.5rem;
  transition: scrollbar-color 0.3s ease;
}

.scroll::-webkit-scrollbar {
  width: 0.6rem;
}

.scroll::-webkit-scrollbar-thumb {
  background-color: var(--blue);
  border-radius: var(--border-radius);
}

.scroll::-webkit-scrollbar-track {
  display: none;
}

.scroll.scrollbar-visible::-webkit-scrollbar-track {
  display: block;
}

/* Dark mode specific styles */
body.dark-mode .btn,
body.dark-mode h2,
body.dark-mode .input-field,
body.dark-mode #todoList p {
  color: var(--text);
}

body.dark-mode .input-field {
  border-color: var(--grey-border);
}

body.dark-mode input[type="text"]::placeholder {
  color: var(--grey);
}

body.dark-mode .disabled {
  color: #8f98a8;
}

body.dark-mode input[type="checkbox"]::before {
  border-color: var(--grey-border);
}

body.dark-mode input[type="checkbox"]:checked::before {
  color: var(--white);
  background-color: var(--green);
  border-color: var(--green);
}

body.dark-mode .btn-delete {
  background-color: var(--grey-dark);
  color: var(--grey-light);
}

body.dark-mode .btn-delete:hover {
  background-color: var(--red);
  color: var(--white);
}

/* Focus styles */
.btn:focus,
.btn-delete:focus,
.counter-container button:focus,
.input-field:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(45, 112, 253, 0.5);
}

/* Task item buttons */
.delete-item,
.edit-item,
.confirm-edit,
.cancel-edit {
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast), transform 0.2s ease-in-out;
  padding: 0.5rem;
  font-size: 1.2rem;
}

.delete-item,
.edit-item {
  color: var(--grey);
  margin-left: auto;
}

.delete-item:hover {
  color: var(--red);
}

.edit-item:hover {
  color: var(--blue);
}

.confirm-edit {
  color: var(--green);
}

.cancel-edit {
  color: var(--red);
}

.delete-item:hover,
.edit-item:hover,
.confirm-edit:hover,
.cancel-edit:hover {
  transform: scale(1.2);
}

.delete-item:active,
.edit-item:active,
.confirm-edit:active,
.cancel-edit:active {
  transform: scale(0.95);
}

.edit-input {
  flex-grow: 1;
  font-size: 1.1rem;
  padding: 0.3rem;
  border: 1px solid var(--grey-border);
  border-radius: var(--border-radius);
}

/* Floating shapes */
.floating-shape {
  position: fixed;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: float 8s ease-in-out infinite;
}

.floating-shape:nth-child(1) {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.floating-shape:nth-child(2) {
  top: 20%;
  right: 10%;
.todo {
  animation: fadeIn 0.5s ease-out;
}

li {
  animation: fadeIn 0.3s ease-out;
}

.btn, .btn-delete {
  animation: scaleIn 0.3s ease-out;
}
}