/* ─────────── VARIABLES DE COULEUR ─────────── */
:root {
  --bg: #f4f7f9;
  --text: #333;
  --card: #ffffff;
  --card-border: #dddddd;
  --input-bg: #ffffff;
  --primary: #0099ff;
  --primary-hov: #0030b3;
  --danger: #dc3545;
  --danger-hov: #c82333;
  --done-bg: #e0e0e0;
  --done-text: #999999;
}

[data-theme="dark"] {
  --bg: #121212;
  --text: #f0f0f0;
  --card: #1e1e1e;
  --card-border: #444444;
  --input-bg: #2c2c2c;
  --primary: #0d6efd;
  --primary-hov: #0b5ed7;
  --danger: #ff6b6b;
  --danger-hov: #ff4c4c;
  --done-bg: #3a3a3a;
  --done-text: #888888;
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 0 1rem;
  transition: background .3s, color .3s;
}

/* ─────────── CONTENEUR ─────────── */
.container {
  width: 100%;
  max-width: 500px;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--card);
  border-radius: 12px;
  border: 1px solid var(--card-border);
  box-shadow: 0 8px 16px rgba(0, 0, 0, .1);
  position: relative;
}

/* ─────────── EN‑TÊTE & SWITCH ─────────── */
h1 {
  font-weight: 600;
  text-align: center;
  margin-bottom: 1rem
}

#theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text);
  cursor: pointer;
  transition: color .2s;
}

/* ─────────── FORMULAIRE ─────────── */
form {
  display: flex;
  gap: .5rem;
  margin-bottom: 1rem
}

input[type="text"] {
  flex: 1;
  padding: .75rem;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text);
  font-size: 1rem;
}

input::placeholder {
  color: #aaa
}

.btn {
  padding: .75rem 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 600;
  transition: background .2s, filter .2s;
}

.btn-primary {
  background: var(--primary);
  color: #fff
}

.btn-primary:hover {
  background: var(--primary-hov)
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  margin: 1rem auto 0
}

.btn-danger:hover {
  background: var(--danger-hov)
}

/* ─────────── LISTE ─────────── */
ul {
  list-style: none;
  padding: 0;
  margin: 0
}

li {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: .75rem 1rem;
  margin-bottom: .5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background .2s, color .2s;
}

li.done {
  background: var(--done-bg);
  color: var(--done-text);
  text-decoration: line-through
}

.trash-btn {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 1.1rem;
  cursor: pointer
}