:root {
  --violet: #6c5ce7;
  --violet-dark: #5a4bd0;
  --rose: #fd79a8;
  --jaune: #ffd23f;
  --vert: #00b894;
  --orange: #ff9f43;
  --rouge: #e74c3c;
  --gris: #f2f3f7;
  --texte: #2d3436;
  --ombre: 0 10px 30px rgba(45, 52, 54, 0.15);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "Comic Sans MS", "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
  color: var(--texte);
  background: linear-gradient(160deg, #a29bfe 0%, #6c5ce7 40%, #fd79a8 100%);
  -webkit-tap-highlight-color: transparent;
}

#app {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.screen { display: none; width: 100%; max-width: 620px; }
.screen.active { display: block; animation: pop 0.25s ease; }

@keyframes pop {
  from { transform: scale(0.96); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.card {
  background: #fff;
  border-radius: 26px;
  padding: 28px 24px;
  box-shadow: var(--ombre);
  text-align: center;
}

h1 { font-size: 2rem; margin: 6px 0 2px; color: var(--violet); }
h2 { font-size: 1.5rem; margin: 6px 0; color: var(--violet-dark); }
.subtitle { color: #636e72; margin: 4px 0 18px; }
.logo { font-size: 3.4rem; line-height: 1; }

/* ---------- Boutons ---------- */
.btn {
  border: none;
  border-radius: 16px;
  padding: 14px 20px;
  font-size: 1.05rem;
  font-family: inherit;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.15s ease, opacity 0.15s;
  display: inline-block;
  margin: 6px 4px;
}
.btn:active { transform: scale(0.96); }
.btn-primary { background: var(--violet); color: #fff; }
.btn-primary:hover { background: var(--violet-dark); }
.btn-secondary { background: var(--gris); color: var(--texte); }
.btn-ghost { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.7); padding: 8px 14px; }
.btn-listen { background: var(--jaune); color: #5a4bd0; margin: 10px 0 4px; }
.btn-big { display: block; width: 100%; padding: 18px; font-size: 1.25rem; margin: 14px 0 6px; }

/* ---------- Connexion ---------- */
.login-card input {
  width: 100%;
  padding: 14px;
  margin: 6px 0 12px;
  border: 2px solid #dfe6e9;
  border-radius: 14px;
  font-size: 1.1rem;
  font-family: inherit;
}
.login-card label { display: block; text-align: left; font-weight: bold; color: #636e72; }
.error { color: #e74c3c; font-weight: bold; margin-top: 8px; }

/* ---------- Barre du haut ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #fff;
  margin-bottom: 12px;
  padding: 0 6px;
  flex-wrap: wrap;
}
.hello { font-size: 1.2rem; font-weight: bold; }
.cal-title { color: #fff; margin: 0; }

.progress-wrap { flex: 1; min-width: 120px; }
.progress-text { color: #fff; font-weight: bold; margin-bottom: 4px; }
.progress-bar { background: rgba(255,255,255,0.35); border-radius: 10px; height: 12px; overflow: hidden; }
#progress-fill { background: var(--jaune); height: 100%; width: 0%; transition: width 0.3s ease; }
.timer { background: rgba(255,255,255,0.25); color: #fff; font-weight: bold; padding: 8px 12px; border-radius: 12px; font-variant-numeric: tabular-nums; }

/* ---------- Exercice ---------- */
.exo-subject {
  display: inline-block;
  background: var(--rose);
  color: #fff;
  padding: 6px 16px;
  border-radius: 999px;
  font-weight: bold;
  margin-bottom: 10px;
}
.exo-instruction { color: #636e72; font-size: 1rem; margin-bottom: 10px; }
.exo-question { font-size: 1.9rem; font-weight: bold; margin: 12px 0; color: var(--texte); line-height: 1.35; }
.answer-input {
  width: 100%;
  padding: 16px;
  font-size: 1.5rem;
  text-align: center;
  border: 3px solid var(--violet);
  border-radius: 16px;
  font-family: inherit;
  margin: 8px 0;
}
.choices { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 8px 0; }
.choice-btn {
  background: var(--gris);
  border: 3px solid transparent;
  border-radius: 16px;
  padding: 16px 22px;
  font-size: 1.6rem;
  font-weight: bold;
  cursor: pointer;
  font-family: inherit;
  min-width: 64px;
}
.choice-btn.selected { border-color: var(--violet); background: #ece9ff; }
.exo-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 6px; }
.hint-box { background: #fff7db; border: 2px dashed var(--jaune); border-radius: 14px; padding: 12px; margin-top: 12px; color: #7a6a1f; }

/* ---------- Feedback ---------- */
.feedback { margin-top: 16px; border-top: 2px dashed #dfe6e9; padding-top: 16px; }
.feedback-smiley { font-size: 4rem; line-height: 1; animation: bounce 0.5s ease; }
@keyframes bounce {
  0% { transform: scale(0.3); }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); }
}
.feedback-grade { font-size: 1.3rem; font-weight: bold; margin: 6px 0; }
.feedback-answer { font-size: 1.2rem; margin: 8px 0; }
.feedback-answer .ok { color: var(--vert); font-weight: bold; }
.feedback-answer .bad { color: #e74c3c; font-weight: bold; }
.feedback-explanation { background: var(--gris); border-radius: 14px; padding: 12px; margin: 10px 0; color: #2d3436; }
.grade-4 { color: var(--vert); }
.grade-3 { color: var(--violet); }
.grade-2 { color: var(--orange); }
.grade-1 { color: #e74c3c; }

/* ---------- Resultat ---------- */
.result-smiley { font-size: 5rem; animation: bounce 0.6s ease; }
.result-note { font-size: 2.6rem; font-weight: bold; color: var(--violet); margin: 6px 0; }
.result-grade { font-size: 1.3rem; font-weight: bold; margin-bottom: 12px; }
.result-breakdown { text-align: left; background: var(--gris); border-radius: 14px; padding: 12px; margin: 12px 0; font-size: 0.95rem; }
.result-breakdown .row { display: flex; justify-content: space-between; padding: 3px 0; }

/* ---------- Calendrier ---------- */
.cal-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.cal-month { font-weight: bold; font-size: 1.2rem; text-transform: capitalize; }
.cal-grid-head, .cal-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; }
.cal-grid-head { font-weight: bold; color: #636e72; margin-bottom: 6px; }
.cal-cell {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  background: var(--gris);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  position: relative;
}
.cal-cell.empty { background: transparent; }
.cal-cell .day-num { position: absolute; top: 3px; left: 5px; font-size: 0.7rem; color: #b2bec3; }
.cal-cell .day-smiley { font-size: 1.4rem; line-height: 1.1; text-align: center; }
.cal-cell { min-width: 0; overflow: hidden; }
.cal-cell.today { outline: 3px solid var(--violet); }
.cal-legend { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 14px; font-size: 0.85rem; color: #636e72; }

/* ---------- Onglets connexion / creation ---------- */
.tabs { display: flex; background: var(--gris); border-radius: 16px; padding: 4px; margin: 6px 0 16px; }
.tab {
  flex: 1; border: none; background: transparent; border-radius: 12px; padding: 10px 8px;
  font-family: inherit; font-weight: bold; font-size: 1rem; color: #636e72; cursor: pointer;
}
.tab.active { background: #fff; color: var(--violet); box-shadow: 0 2px 8px rgba(45, 52, 54, 0.12); }
.tab[hidden] { display: none; }
.info { background: #ece9ff; color: var(--violet-dark); border-radius: 14px; padding: 10px 12px; text-align: left; margin: 0 0 12px; }
.hint { color: #636e72; font-size: 0.85rem; text-align: left; margin: -6px 0 10px; }
.btn-link { background: transparent; color: #636e72; font-weight: normal; font-size: 0.95rem; text-decoration: underline; }
.btn-small { padding: 8px 12px; font-size: 0.9rem; border-radius: 12px; margin: 3px 2px; }
.btn-danger { background: #ffe3e0; color: #c0392b; }
.btn-danger:hover { background: #ffd0cb; }

/* ---------- Administration ---------- */
.admin-card { text-align: left; }
.admin-toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.admin-toolbar .btn { margin: 0; }
.switch-row { display: flex; gap: 8px; align-items: center; color: #636e72; font-size: 0.9rem; cursor: pointer; max-width: 320px; }
.switch-row input { width: 20px; height: 20px; accent-color: var(--violet); flex-shrink: 0; }
.user-list { list-style: none; padding: 0; margin: 0; }
.user-row {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between;
  padding: 12px 0; border-top: 1px solid #eef0f4;
}
.user-row:first-child { border-top: none; }
.user-main { min-width: 0; flex: 1 1 220px; }
.user-name { font-weight: bold; font-size: 1.1rem; }
.user-meta { color: #636e72; font-size: 0.85rem; margin-top: 2px; overflow-wrap: anywhere; }
.user-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; }
.badge { display: inline-block; font-size: 0.7rem; padding: 2px 8px; border-radius: 999px; vertical-align: middle; margin-left: 4px; }
.badge-admin { background: var(--violet); color: #fff; }
.badge-eleve { background: #d6f5ec; color: #00876a; }
.badge-me { background: #fff1c1; color: #8a6d00; }

/* ---------- Fenetres ---------- */
.dialog {
  border: none; border-radius: 22px; padding: 22px 20px; width: min(440px, calc(100vw - 32px));
  box-shadow: var(--ombre); color: var(--texte); font-family: inherit;
}
.dialog::backdrop { background: rgba(45, 52, 54, 0.45); }
.dialog h2 { margin-top: 0; }
.dialog label { display: block; font-weight: bold; color: #636e72; }
.dialog input, .dialog select, .login-card select {
  width: 100%; padding: 12px; margin: 6px 0 12px; border: 2px solid #dfe6e9; border-radius: 12px;
  font-size: 1rem; font-family: inherit; background: #fff;
}
.dialog input:disabled { background: var(--gris); color: #636e72; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 6px; margin-top: 6px; }

@media (max-width: 480px) {
  .user-actions { justify-content: flex-start; }
  .exo-question { font-size: 1.5rem; }
  .card { padding: 20px 16px; }
  .cal-grid-head, .cal-grid { gap: 4px; }
  .cal-cell .day-smiley { font-size: 1rem; }
}