* {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

:root {
  --primary-color: #011640;
  --secondary-color: #ffffff;
  --tertiary-color: #03318c;
  --button-color1: #6c55bd;
  --button-color2: #04adbf;
  --dark-background: #6c55bd;
  --background-secondary: #000000;
  --background-tertiary: #ffffff8b;
  --text-color: #1d0c59;
  --danger-bg: #ff000017;
  --hover-delete: #8704042d;
  --border-radius: 0.5rem;
  --gap-medium: 1rem;
  --gap-small: 0.5rem;
}

body {
  background: linear-gradient(
    155deg,
    var(--primary-color),
    var(--background-secondary)
  );
  min-height: 100vh;
}

.todo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: clamp(2rem, 5vw, 3rem) 1rem;
}

header {
  background-size: cover;
  border: 2px solid var(--button-color1);
  border-radius: 1rem;
  padding: 1.4rem;
}

header,
.form-container,
.tasks-container {
  margin-left: auto;
  margin-right: auto;
}

h1 {
  display: inline-block;
  color: var(--secondary-color);
  font-size: clamp(1.9rem, 5vw, 2.5rem);
}

img {
  height: clamp(1.9rem, 4vw, 2rem);
}

form {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.form-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin: 2rem 0 0 0;
}

#task-input {
  color: var(--secondary-color);
  padding: var(--gap-small);
  border: 2px solid var(--button-color1);
  font-size: clamp(0.9rem, 3vw, 1.1rem);
  border-radius: var(--gap-medium);
  background: none;
}

#task-input::placeholder {
  font-size: 0.9rem;
  color: var(--background-tertiary);
  opacity: 1;
}

#task-input:focus {
  outline: 2px solid var(--button-color1);
}

#task-message {
  color: #ff5555;
  font-size: 0.9rem;
  margin-top: var(--gap-small);
}

#add-button {
  background: url("../assets/icons/add.webp") no-repeat center;
  background-size: cover;
  width: 2.25rem;
  height: 2.25rem;
  border: 2px solid var(--button-color1);
  border-radius: 50%;
  cursor: pointer;
  transition: 0.5s;
}

#add-button:hover {
  box-shadow: 2px 2px 5px #0000005e;
  transform: scale(1.1);
}

#add-button:active {
  transform: scale(0.95);
  box-shadow: 0px 0px 2px #0000005e;
}

.tasks-container {
  border: 2px solid var(--button-color1);
  margin-top: 2rem;
  border-radius: 0.5rem;
  width: 70vw;
  min-height: 20vh;
  max-width: 500px;
}

.tasks-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-small);
  background-color: #ffffff4e;
  color: var(--secondary-color);
  border-radius: var(--border-radius);
  margin: var(--gap-small);
  padding: var(--gap-small) var(--gap-medium);
  font-size: clamp(0.9rem, 3vw, 1rem);
  text-transform: capitalize;
  cursor: pointer;
}

.task-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

div.task-actions {
  display: flex;
  gap: 2rem;
}

.checkbox-list {
  width: 19px;
  height: 20px;
  -webkit-appearance: none;
  appearance: none;
  border: 2px solid #000000;
  margin: 0.2rem;
  border-radius: 5px;
  cursor: pointer;
  position: relative;
}

.checkbox-list:checked {
  background-color: #4f752a;
  border-color: var(--dark-background);
}

.checkbox-list:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 4px;
  height: 10px;
  border: 1px solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.completed {
  text-decoration: line-through;
  color: var(--primary-color);
}

.edit-button {
  background: url("../assets/icons/editar.svg") no-repeat center;
  background-size: cover;
  border: none;
  cursor: pointer;
  height: 24px;
  width: 24px;
}

.edit-button:hover {
  background-color: var(--secondary-color);
  border-radius: 0.3rem;
}

.delete-button {
  background: url("../assets/icons/lixeira.png") no-repeat center;
  background-size: contain;
  width: 1.5rem;
  height: 1.5rem;
  border: none;
  cursor: pointer;
}

.delete-button:hover {
  background-color: var(--secondary-color);
  border-radius: 0.3rem;
}

footer {
  margin-top: 3rem;
  color: #ffffff;
}

@media (max-width: 600px) {
  .tasks-list li {
    font-size: 1rem;
  }
  div.task-actions {
    gap: 5px;
  }
}