/* -------------------------
   Base variables
------------------------- */
:root {
  --spacing-sm: 10px;
  --spacing-lg: 15px;
  --primary: #0077cc;
  --primary-hover: #005fa3;
  --danger: #d32f2f;
  --review-explanation: #555;
  --text-lg: 16px;
  --text-xl: 20px;
  --font-bold: 700;
}

/* 🌞 Light Theme (default) */
:root[data-theme="light"] {
  --bg: #f0f2f5;
  --text: #000;
  --card-bg: #fff;
  --border: #ccc;
  --progress-bg: #2e7d32;
  --time-bg: #cf7200;
  --input-bg: #fff;
  --input-border: #ccc;
  --link: #0077cc;
  --link-hover: #005fa3;
  --link-visited: #551a8b;
  --review-correct: #2e7d32;
  --review-wrong: #c62828;
}

/* 🌙 Dark Theme */
:root[data-theme="dark"] {
  --bg: #121212;
  --text: #eee;
  --card-bg: #1e1e1e;
  --border: #444;
  --progress-bg: #4caf50;
  --time-bg: #ff9800;
  --input-bg: #2a2a2a;
  --input-border: #555;
  --link: #4dabf7;
  --link-hover: #82c7ff;
  --link-visited: #a97fff;
  --review-correct: #81c784;
  --review-wrong: #ef5350;
}

/* -------------------------
   Global styles
------------------------- */
html, body {
  min-height: 100%;
  margin: 0;
  overflow-x: hidden; /* prevents horizontal scrolling */
}

body {
  display: flex;
  flex-direction: column;
  justify-content: flex-start; /* avoids clipping the top when centering vertically */
  align-items: center;     /* horizontally center */
  font-size: 16px;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 20px;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

h1 {
  text-align: center;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
}

/* -------------------------
   Quiz container
------------------------- */
.quiz-box {
  width: 100%;
  max-width: 760px;
  margin: 18px auto;
  padding: clamp(12px, 2vw, 24px);
  box-sizing: border-box;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  overflow-wrap: break-word;
}

.question {
  font-size: clamp(1.125rem, 3.5vw, 1.5rem); /* 18–24px fluide */
  font-weight: var(--font-bold);
  margin-bottom: var(--spacing-lg);
}

.options {
  display: flex;
  flex-direction: column; /* toujours vertical */
  gap: 8px;
}

.options label {
  font-size: clamp(1rem, 3vw, 1.25rem); /* 16–20px fluid */
  display: block;
  margin-bottom: var(--spacing-sm);
  overflow-wrap: break-word;
}

/* top container (numQuestions, timer, mode, checkbox, button) */
.quiz-box .mb {
  display: flex;
  flex-wrap: wrap;        /* permet de passer à la ligne si manque de place */
  align-items: center;    /* aligne verticalement les items */
  gap: 10px;              /* espace régulier entre eux */
}

/* inputs/selects/buttons never overflow their container */
.quiz-box input,
.quiz-box select,
.quiz-box button {
  max-width: 100%;
  box-sizing: border-box;
}

/* timer + questions + select use flexible space */
.quiz-box input[type="number"],
.quiz-box select {
  flex: 1 1 auto;
  min-width: 80px;        /* minimum to prevent them from shrinking too much */
}

/* bouton Start Session bien visible */
#startSessionBtn {
  flex: 1 1 100%;         /* button takes full width on small screens */
  max-width: 240px;       /* limit on large screens */
  margin-top: 10px;
  align-self: flex-start;
}

/* checkbox + label sur une seule ligne */
.quiz-box label[for="freeTraining"] {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}

/* -------------------------
   Buttons
------------------------- */
button {
  font-size: clamp(1rem, 3vw, 1.25rem);
  padding: clamp(10px, 2vw, 14px) clamp(16px, 4vw, 24px);
  border-radius: 8px;
  margin-top: var(--spacing-sm);
  border: none;
  background: var(--primary);
  color: white;
  cursor: pointer;
  transition: background 0.25s ease;
}

button:hover {
  background: var(--primary-hover);
}

/* Boutons Next et Submit : larges, carrés, centrés */
#submitBtn,
#nextBtn {
  display: block;
  margin: 20px auto 0 auto; /* centrés */
  width: 100%;             /* occupe toute la largeur de la quiz-box */
  font-size: 1.2rem;
  padding: 14px 0;         /* bien hauts et larges */
  border-radius: 8px;
  box-sizing: border-box;  /* padding inclus dans la largeur */
}


/* -------------------------
   Results & score
------------------------- */
.result {
  font-size: clamp(1rem, 2.8vw, 1.25rem);
  font-weight: var(--font-bold);
  margin-top: var(--spacing-sm);
}

.score-box {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  text-align: center;
  font-weight: var(--font-bold);
  margin-top: var(--spacing-lg);
}

/* -------------------------
   Utilities
------------------------- */
.hidden { display: none !important; }
.m-sm { margin-bottom: var(--spacing-sm); }
.m-lg { margin-bottom: var(--spacing-lg); }
.mb { margin-bottom: var(--spacing-lg); }
.ml-lg { margin-left: var(--spacing-lg); }
.centered { text-align: center; }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.font-bold { font-weight: var(--font-bold); }

/* accessibility helper for screen-reader-only text */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; /* prevent line breaks */
  border: 0;
}

/* small utility aliases used in HTML */
.spaced { margin-right: var(--spacing-sm); }
.large { font-size: var(--text-xl); }
.bold { font-weight: var(--font-bold); }

/* -------------------------
   Modal (import chooser)
------------------------- */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.5);
  z-index: 1200;
}
.modal.hidden { display: none; }

.modal-content {
  background: var(--card-bg);
  color: var(--text);
  padding: 18px 20px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  min-width: 280px;
  max-width: 90%;
  animation: fadeIn 0.18s ease-out;
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
}
.modal-actions button {
  margin: 0;
  padding: 8px 14px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
}
.modal-actions button:hover { filter: brightness(0.95); }

/* -------------------------
   Review styles
------------------------- */
.review-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.review-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  overflow-wrap: break-word;
}

.review-item .question {
  font-size: clamp(1rem, 3vw, 1.3rem);
  margin-bottom: 8px;
}

.review-item .explanation {
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  line-height: 1.4;
  margin-top: 6px;
  color: var(--review-explanation);
}

/* -------------------------
------------------------- */
.timer {
  font-size: 18px;
  color: var(--danger);
  text-align: right;
  margin-bottom: var(--spacing-sm);
}

.double-bar-container {
  width: 100%;
  max-width: 100%; /* ne dépasse jamais la boîte parente */
  margin: 10px 0;  /* petit espace vertical */
  box-sizing: border-box; /* padding inclus dans la largeur */
}

.progress-container,
.time-container {
  width: 100%;
  background: #e0e0e0;
  overflow: hidden;
  margin-bottom: 0px;
}

.progress-container {
  height: 18px;
  border-radius: 10px 10px 0 0;
}

.time-container {
  height: 14px;
  border-radius: 0 0 10px 10px;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--progress-bg) !important;
  transition: width 0.4s ease;
}

.time-bar {
  height: 100%;
  width: 0%;
  background: var(--time-bg) !important;
  transition: width 1s linear;
}

/* -------------------------
   Input styles
------------------------- */
input, select, textarea {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 10px;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
}

input[type="checkbox"], input[type="radio"] {
  accent-color: var(--primary);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
}

/* -------------------------
   Link styles
------------------------- */
a {
  color: var(--link);
  text-decoration: underline;
}
a:hover { color: var(--link-hover); }
a:visited { color: var(--link-visited); }

/* -------------------------
   Responsive helpers
------------------------- */
.app-container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
  box-sizing: border-box;
}

button, input[type="text"], input[type="number"], select, textarea {
  width: auto;
  min-width: 0;
}

@media (max-width: 600px) {
  .quiz-box { padding: 12px; border-radius: 10px; }
  .options label { font-size: 0.95rem; }
  button { width: 100%; display: block; margin-bottom: 10px; }
  .double-bar-container { height: 36px; }

  .double-bar-container.stack-vertical {
    display: flex;
    flex-direction: column;
    height: 40px;
  }
  .double-bar-container.stack-vertical .progress-bar,
  .double-bar-container.stack-vertical .time-bar {
    height: 50%;
    width: 100%;
    transition: width 0.35s linear;
  }

  /* MODIFICATION: exclure les checkboxes/radios */
  .quiz-box input:not([type="checkbox"]):not([type="radio"]),
  .quiz-box select {
    display: block;
    width: 100%;
    margin-bottom: 10px;
  }
  .quiz-box .input--short { max-width: 100%; }
}

@media (min-width: 601px) and (max-width: 900px) {
  .quiz-box { max-width: 680px; }
  button { padding: 10px 14px; }
}

/* images / media responsive */
img, video { max-width: 100%; height: auto; display: block; }

/* utilities useful for responsive layout */
.row { display: flex; flex-wrap: wrap; gap: 12px; }
.col { flex: 1 1 0; min-width: 0; }
.col-50 { flex: 1 1 48%; }
.col-100 { flex: 1 1 100%; }

.form-row {
  display: flex;
  flex-wrap: wrap; /* passe à la ligne si trop serré */
  gap: 12px;       /* espace entre eux */
  align-items: center;
  margin-bottom: 12px;
}

.form-row label {
  flex: 1; /* les labels s’adaptent à l’espace */
  min-width: 120px;
}

.form-row input {
  flex: 2; /* les inputs prennent plus de place */
  min-width: 80px;
}

/* Empêche inputs + labels de déborder */
.quiz-box label,
.quiz-box input,
.quiz-box select {
  max-width: 100%;
  box-sizing: border-box;
}

/* Garder No timer + case à cocher sur la même ligne */
.inline-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}

.inline-checkbox input[type="checkbox"] {
  width: auto;
  flex-shrink: 0;
}

/* empêche tout débordement de texte sur petits écrans */
.quiz-box,
.question,
.options label,
.review-item,
button {
  word-wrap: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
  max-width: 100%; /* ne jamais dépasser la largeur de l'écran */
}

.review-correct {
  color: var(--review-correct);
  font-weight: bold;
}

.review-wrong {
  color: var(--review-wrong);
  font-weight: bold;
}

@media (min-width: 901px) {
  .quiz-box {
    width: clamp(50%, 65%, 70%); /* fluide entre 50 et 70% */
    margin: 20px auto;
  }
}


/* Forcer la checkbox et son texte à rester collés */
.inline-checkbox,
.quiz-box label[for="freeTraining"] {
  display: inline-flex;
  align-items: center;
  gap: 6px;          /* petit espace régulier */
  white-space: normal;  /* autorise le texte long à passer à la ligne */
}

.inline-checkbox input[type="checkbox"],
.quiz-box label[for="freeTraining"] input[type="checkbox"] {
  flex-shrink: 0; /* la case ne rétrécit jamais */
}

/* Règle générale pour toutes les cases à cocher et radios */
input[type="checkbox"],
input[type="radio"] {
  margin: 0;                /* enlève les marges par défaut */
  vertical-align: middle;   /* bien aligné avec le texte */
}

/* Le label garde la case et son texte collés */
label {
  display: inline-flex;
  align-items: center;
  gap: 4px;              /* petit espace entre case et texte */
  white-space: normal;   /* permet le retour à la ligne si texte trop long */
}

/* Conteneur des paramètres */
.session-params {
  background: var(--card-bg);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 16px;
  transition: all 0.3s ease;
  overflow: hidden;
}

/* Version compacte */
.session-params.compact {
  height: 40px; /* hauteur fixe pour le ruban */
  padding: 4px 12px;
  cursor: pointer;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* cache tout sauf le ruban */
.session-params.compact > * {
  display: none; /* tout enfant est caché */
}

/* texte du ruban */
.session-params.compact::before {
  content: "⚙️ Session Parameters (click to expand)";
  display: block;
  line-height: 40px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.centered {
  display: flex;
  flex-direction: column; /* empile les labels + inputs */
  align-items: flex-start;
  gap: 6px;
  width: 100%;
  max-width: 760px; /* même que quiz-box */
}

.centered input,
.centered select {
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
}

.centered label {
  white-space: normal;
  overflow-wrap: break-word;
}