* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: poppins, sans-serif;
}
.container {
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(135deg, #153677, #4e085f);
  padding: 10px;
}
.todo-app {
  width: 100%;
  max-width: 540px;
  background: #fff;
  margin: 100px auto 20px;
  padding: 40px 30px 70px;
  border-radius: 10px;
}
.todo-app h2 {
  color: #002765;
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}
.todo-app h2 img {
  width: 30px;
  margin-left: 10px;
}

body.dark-mode {
  background: #121212;
}

body.dark-mode .container {
  background: linear-gradient(135deg, #0f172a, #1e293b);
}

body.dark-mode .todo-app {
  background: #2c2c2c;
  color: white;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  border: 1px solid #444;
}

body.dark-mode .todo-app h2 {
  color: white;
}

body.dark-mode .row {
  background: #333;
}

body.dark-mode input {
  color: white;
}

body.dark-mode ul li {
  color: white;
}

body.dark-mode ul li.checked {
  color: #cbd5e1;
  text-decoration: line-through;
}
body.dark-mode ul li .delete-btn {
  color: #f8fafc;
  font-weight: bold;
}

body.dark-mode ul li span:hover {
  background: #475569;
  color: white;
}

#theme-toggle {
  width: 100%;
  margin-bottom: 15px;
  padding: 12px;
  background: #002765;
  color: white;
  border-radius: 10px;
  cursor: pointer;
}

#theme-toggle:hover {
  opacity: 0.9;
}
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #edeef0;
  padding-left: 20px;
  border-radius: 25px;
}
input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 10px;
  font-size: 14px;
}
button {
  border: none;
  outline: none;
  padding: 16px 50px;
  cursor: pointer;
  background: #ff5945;
  font-size: 16px;
  border-radius: 40px;
}
ul li {
  list-style: none;
  font-size: 17px;
  padding: 12px 8px 12px 50px;
  user-select: none;
  cursor: pointer;
  position: relative;
}
ul li::before {
  content: "";
  position: absolute;
  height: 28px;
  width: 28px;
  border-radius: 50%;
  background-image: url(images/unchecked.png);
  background-size: cover;
  background-position: center;
  top: 12px;
  left: 8px;
}
ul li.checked {
  text-decoration: line-through;
  color: #555;
}
ul li.checked::before {
  background-image: url(images/checked.png);
}
ul li .delete-btn {
  position: absolute;
  right: 0;
  top: 5px;
  width: 40px;
  height: 40px;
  font-size: 22px;
  color: #555;
  line-height: 40px;
  text-align: center;
  border-radius: 50%;
}
ul li span:hover {
  background: #edeef0;
}
#task-count {
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 600;
  align-items: center;
}
.task-stats {
  display: flex;
  /* align-items: center; */
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 600;
}
.count-color {
  color: #ff5945;
}
#search-box {
  width: 100%;
  margin-bottom: 15px;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: #edeef0;
  font-size: 14px;
}
body.dark-mode #search-box {
  background: #334155;
  color: #f8fafc;
}

body.dark-mode #search-box::placeholder {
  color: #cbd5e1;
}

.delete-btn {
  right: 0;
}

.delete-btn:hover {
  background: #ff5945;
  color: white;
}

ul li input {
  background: transparent;
  border: none;
  outline: none;
  color: inherit;
  font-size: 17px;
  width: 70%;
}

@media (max-width: 500px) {
  .todo-app {
    margin: 30px auto 20px;
    padding: 24px 16px 40px;
    border-radius: 12px;
  }
  .todo-app h2 {
    font-size: 22px;
  }
  .row {
    padding-left: 14px;
  }
  .row input {
    font-size: 13px;
    padding: 8px;
  }
  button#add-btn {
    padding: 12px 24px;
    font-size: 14px;
  }
  ul li {
    font-size: 15px;
    padding: 10px 45px 10px 44px;
    word-break: break-word;
  }
  ul li::before {
    top: 9px;
    left: 6px;
    width: 24px;
    height: 24px;
  }
}