:root {
  --background: #101114;
  --primary-color: #1c1d20;
  --secondary-color: #4a4d57;
  --accent-color: #00ffc4;
  --text-color: #f9f9f9;
  --sub-bg: #16171a;
  --sub-indent: 28px;
}
* {
  margin: 0;
  padding: 0;
}
html {
  font-family:
    "Lucida Sans", "Lucida Sans Regular", "Lucida Grande",
    "Lucida Sans Unicode", Geneva, Verdana, sans-serif;
  font-size: 16pt;
  color: var(--text-color);
}
body {
  min-height: 100vh;
  padding: 10px;
  background-color: var(--background);
  display: flex;
  flex-direction: column;
  align-items: center;
}
h1 {
  margin-top: 100px;
  margin-bottom: 20px;
  font-size: 3rem;
  font-weight: 800;
  text-transform: uppercase;
  text-align: center;
  color: var(--accent-color);
}
.wrapper {
  width: 700px;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
#todo-input {
  box-sizing: border-box;
  padding: 12px 20px;
  width: 100%;
  background: none;
  border: 2px solid var(--secondary-color);
  border-radius: 1000px;
  font: inherit;
  color: var(--text-color);
  caret-color: var(--accent-color);
}
#todo-input:focus {
  outline: none;
}
form {
  position: relative;
}
#add-button {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--accent-color);
  height: 100%;
  padding: 0 30px;
  border: none;
  border-radius: 1000px;
  font: inherit;
  font-weight: 600;
  color: var(--background);
  cursor: pointer;
}

/* ── TASK ITEM ─────────────────────────────────────────────────────────────── */
.todo {
  margin-bottom: 10px;
  padding: 0 16px;
  background-color: var(--primary-color);
  border-radius: 15px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  transition:
    opacity 200ms ease,
    box-shadow 200ms ease;
  position: relative;
  user-select: none;
  -webkit-user-select: none;
}
.todo.dragging {
  opacity: 0.4;
}
.todo.drag-over {
  box-shadow: 0 -3px 0 0 var(--accent-color);
}

/* ── DRAG HANDLE ───────────────────────────────────────────────────────────── */
.drag-handle {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary-color);
  cursor: grab;
  padding: 4px 6px 4px 0;
  flex-shrink: 0;
  touch-action: none;
  transition: color 200ms ease;
}
.drag-handle:hover,
.drag-handle:active {
  color: var(--accent-color);
  cursor: grab;
}
.drag-handle--sub {
  padding: 3px 4px 3px 0;
}

/* ── TASK NUMBER ───────────────────────────────────────────────────────────── */
.task-number {
  font-size: 0.8em;
  color: var(--secondary-color);
  min-width: 26px;
  flex-shrink: 0;
  margin-right: 4px;
}
.task-number--sub {
  font-size: 0.75em;
  min-width: 22px;
}

/* ── TODO TEXT ─────────────────────────────────────────────────────────────── */
.todo .todo-text {
  padding: 15px 0 15px 10px;
  flex-grow: 1;
  transition: 500ms ease;
  word-break: break-word;
  cursor: default;
}
.todo input[type="checkbox"] {
  display: none;
}
.todo input[type="checkbox"]:checked ~ .custom-checkbox {
  background-color: var(--accent-color);
}
.todo input[type="checkbox"]:checked ~ .custom-checkbox svg {
  fill: var(--primary-color);
}
.todo input[type="checkbox"]:checked ~ .todo-text {
  text-decoration: line-through;
  color: var(--secondary-color);
}

/* ── BUTTONS ───────────────────────────────────────────────────────────────── */
.delete-button {
  padding: 3px;
  background: none;
  border: none;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  flex-shrink: 0;
}
.delete-button svg {
  transition: 1000ms ease;
}
.delete-button:hover svg {
  fill: #ff0033 !important;
}
.add-sub-button {
  width: 32px;
  height: 32px;
  background-color: var(--accent-color);
  border: none;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  color: var(--background);
  flex-shrink: 0;
  transition:
    transform 200ms ease,
    background-color 200ms ease;
  margin: 0 6px;
}
.add-sub-button:hover {
  transform: scale(1.15);
  background-color: var(--accent-color);
}
.add-sub-button svg {
  fill: currentColor;
}

.sub-cancel-btn {
  padding: 6px 14px;
  background: none;
  border: 1px solid var(--secondary-color);
  border-radius: 1000px;
  font: inherit;
  font-size: 0.75em;
  color: var(--secondary-color);
  cursor: pointer;
  white-space: nowrap;
  transition: 300ms ease;
}
.sub-cancel-btn:hover {
  border-color: #ff0033;
  color: #ff0033;
}
/* ── CUSTOM CHECKBOX ───────────────────────────────────────────────────────── */
.custom-checkbox {
  border: 3px solid var(--accent-color);
  border-radius: 50%;
  min-height: 20px;
  min-width: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  transition: 500ms ease;
  cursor: pointer;
}
.custom-checkbox--sub {
  min-height: 16px;
  min-width: 16px;
  border-width: 2px;
}

/* ── SUBTASK INPUT ROW ─────────────────────────────────────────────────────── */
.sub-input-row {
  width: 100%;
  display: flex;
  gap: 8px;
  padding: 8px 0 12px var(--sub-indent);
  box-sizing: border-box;
}
.sub-input-row.hidden {
  display: none;
}
.subtask-input {
  flex: 1;
  padding: 8px 14px;
  background: none;
  border: 1.5px solid var(--secondary-color);
  border-radius: 1000px;
  font: inherit;
  font-size: 0.8em;
  color: var(--text-color);
  caret-color: var(--accent-color);
}
.subtask-input:focus {
  outline: none;
  border-color: var(--accent-color);
}
.sub-add-confirm {
  padding: 6px 16px;
  background-color: var(--accent-color);
  border: none;
  border-radius: 1000px;
  font: inherit;
  font-size: 0.75em;
  font-weight: 700;
  color: var(--background);
  cursor: pointer;
  white-space: nowrap;
}

/* ── SUBTASK LIST ──────────────────────────────────────────────────────────── */
.subtask-list {
  list-style: none;
  width: 100%;
  padding: 4px 0 8px var(--sub-indent);
  box-sizing: border-box;
  border-left: 2px solid var(--secondary-color);
  margin-left: calc(var(--sub-indent) - 2px);
}

/* ── SUBTASK ITEM ──────────────────────────────────────────────────────────── */
.subtask {
  display: flex;
  align-items: center;
  padding: 4px 8px 4px 0;
  border-radius: 10px;
  transition:
    opacity 200ms ease,
    box-shadow 200ms ease;
  user-select: none;
  -webkit-user-select: none;
}
.subtask.dragging {
  opacity: 0.35;
}
.subtask.drag-over {
  box-shadow: 0 -2px 0 0 var(--accent-color);
}
.subtask-text {
  font-size: 0.85em;
  padding: 8px 0 8px 8px !important;
  color: var(--text-color);
  opacity: 0.85;
  cursor: default;
}
.subtask input[type="checkbox"] {
  display: none;
}
.subtask input[type="checkbox"]:checked ~ .custom-checkbox {
  background-color: var(--accent-color);
}
.subtask input[type="checkbox"]:checked ~ .custom-checkbox svg {
  fill: var(--primary-color);
}
.subtask input[type="checkbox"]:checked ~ .subtask-text {
  text-decoration: line-through;
  color: var(--secondary-color);
  opacity: 0.6;
}
.delete-button--sub svg {
  width: 18px;
  height: 18px;
}

/* ── TOUCH DRAG CLONE ──────────────────────────────────────────────────────── */
.touch-drag-clone {
  position: absolute;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.85;
  border-radius: 15px;
  background-color: var(--primary-color);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  padding: 0 16px;
  display: flex;
  align-items: center;
}

/* ── RESPONSIVE ────────────────────────────────────────────────────────────── */
@media (max-width: 500px) {
  html {
    font-size: 12pt;
  }
  #add-button {
    position: unset;
    width: 100%;
    margin-top: 10px;
    padding: 15px;
    height: auto;
  }
  h1 {
    margin-top: 50px;
    font-size: 15vw;
  }
  .subtask-list {
    padding-left: 18px;
    margin-left: 16px;
  }
  .sub-input-row {
    padding-left: 18px;
  }
}

/* ── AUTH ───────────────────────────────────────────────────────────────────── */
#login-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 20px;
  box-sizing: border-box;
}
.login-box {
  width: 700px;
  max-width: 100%;
  background-color: var(--primary-color);
  border-radius: 15px;
  padding: 40px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.login-subtitle {
  color: var(--secondary-color);
  font-size: 0.85em;
  text-align: center;
}
.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
#email-input {
  box-sizing: border-box;
  padding: 12px 20px;
  width: 100%;
  background: none;
  border: 2px solid var(--secondary-color);
  border-radius: 1000px;
  font: inherit;
  color: var(--text-color);
  caret-color: var(--accent-color);
}
#email-input:focus {
  outline: none;
  border-color: var(--accent-color);
}
#magic-link-button {
  width: 100%;
  padding: 14px;
  background-color: var(--accent-color);
  border: none;
  border-radius: 1000px;
  font: inherit;
  font-weight: 600;
  color: var(--background);
  cursor: pointer;
}
.login-message {
  text-align: center;
  font-size: 0.85em;
  color: var(--accent-color);
}
.login-message.error {
  color: #ff0033;
}

/* ── LOGOUT ─────────────────────────────────────────────────────────────────── */
#logout-button {
  position: fixed;
  top: 16px;
  right: 16px;
  background: none;
  border: 1px solid var(--secondary-color);
  border-radius: 1000px;
  color: var(--secondary-color);
  font: inherit;
  font-size: 0.65em;
  padding: 6px 14px;
  cursor: pointer;
  transition: 300ms ease;
  z-index: 100;
}
#logout-button:hover {
  border-color: #ff0033;
  color: #ff0033;
}

/* ── UTILITY ─────────────────────────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ── APP WRAPPER ─────────────────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}