/* ==========================================================================
   Entrainement aux QCM - feuille de style
   Palette : gris sombre, bleu marine, gris clair, accents cyan.
   ========================================================================== */

:root {
  --bg: #12151b;            /* gris sombre, fond de page */
  --surface: #182031;       /* marine sombre, cartes */
  --surface-raised: #1e2a40;/* marine, éléments actifs */
  --border: #2b3852;        /* liseré marine */
  --text: #dde3ec;          /* gris clair */
  --muted: #92a0b8;         /* gris atténué */
  --cyan: #3ddcf3;          /* accent principal */
  --cyan-soft: rgba(61, 220, 243, 0.12);
  --danger: #ff6b7a;
  --ok: #55d68a;

  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 10px;
  --radius-sm: 6px;
  --content-width: 1060px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 700; }

p { margin: 0 0 1em; }

a { color: var(--cyan); }

button { font-family: inherit; }

/* --- Accessibilité ------------------------------------------------------ */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--cyan);
  color: #06222a;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}

/* --- En-tête ------------------------------------------------------------ */

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--cyan);
  border-radius: var(--radius-sm);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.1rem;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  position: relative;
}

.brand-name::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.main-nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover { color: var(--text); background: var(--surface); }

.main-nav a.active {
  color: var(--cyan);
  background: var(--cyan-soft);
}

.nav-admin { border: 1px solid var(--border); }

/* --- Mise en page ------------------------------------------------------- */

.page {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  min-height: 60vh;
}

.footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 1.5rem;
}

.page-intro { color: var(--muted); max-width: 60ch; }

.section { margin-top: 2.5rem; }

/* --- Héros (accueil) ---------------------------------------------------- */

.hero {
  padding: 2.5rem 0 1rem;
}

.hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 span { color: var(--cyan); }

.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-stats strong {
  display: block;
  color: var(--text);
  font-size: 1.6rem;
  font-weight: 500;
}

/* --- Cartes et listes --------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1rem;
}

.card h3 { margin-bottom: 0.3rem; }

.card .meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.card .desc { color: var(--muted); font-size: 0.95rem; }

.empty {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: var(--muted);
}

/* --- Boutons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  background: var(--surface-raised);
  color: var(--text);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 120ms ease, background 120ms ease;
}

.btn:hover { border-color: var(--cyan); }

.btn-primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #06222a;
  font-weight: 600;
}

.btn-primary:hover { background: #63e6f7; }

.btn-danger { color: var(--danger); }
.btn-danger:hover { border-color: var(--danger); }

.btn-small { padding: 0.3rem 0.7rem; font-size: 0.85rem; }

.btn-row { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1rem; }

/* --- Étiquettes de catégories ------------------------------------------- */

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  background: var(--cyan-soft);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.1rem 0.65rem;
  margin: 0 0.25rem 0.25rem 0;
  white-space: nowrap;
}

.tag-filter {
  cursor: pointer;
  color: var(--muted);
  background: transparent;
  border-color: var(--border);
  font-size: 0.85rem;
  padding: 0.3rem 0.9rem;
}

.tag-filter:hover { color: var(--text); border-color: var(--cyan); }

.tag-filter.selected {
  color: #06222a;
  background: var(--cyan);
  border-color: var(--cyan);
}

.tag-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 1rem 0; }

/* --- Banque de questions ------------------------------------------------ */

.question-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin-bottom: 0.8rem;
}

.question-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}

.question-item summary::-webkit-details-marker { display: none; }

.question-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--cyan);
  flex-shrink: 0;
}

.question-item[open] summary::after { content: "–"; }

.question-body { margin-top: 0.9rem; border-top: 1px solid var(--border); padding-top: 0.9rem; }

.answer-list { list-style: none; padding: 0; margin: 0 0 0.8rem; }

.answer-list li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.35rem 0;
  color: var(--muted);
}

.answer-list li.correct { color: var(--ok); }

.keycap {
  display: inline-grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-bottom-width: 3px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  background: var(--surface-raised);
}

li.correct .keycap { border-color: var(--ok); color: var(--ok); }

.explanation {
  border-left: 2px solid var(--cyan);
  padding: 0.2rem 0 0.2rem 0.9rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* --- Formulaires -------------------------------------------------------- */

.field { margin-bottom: 1.1rem; }

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.field .hint { font-weight: 400; color: var(--muted); }

input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 0.55rem 0.8rem;
  font-family: inherit;
  font-size: 0.95rem;
}

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

textarea { min-height: 90px; resize: vertical; }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0;
  font-size: 0.95rem;
}

.checkbox-row input { accent-color: var(--cyan); width: auto; }

.answer-input-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.6rem;
}

.answer-input-row input[type="radio"] { accent-color: var(--cyan); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 760px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* --- Quiz --------------------------------------------------------------- */

.progress-rail {
  display: flex;
  gap: 4px;
  margin: 1.5rem 0 2rem;
}

.progress-rail span {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
}

.progress-rail span.done { background: var(--cyan); }
.progress-rail span.current { background: var(--cyan); opacity: 0.45; }

.quiz-question {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.quiz-counter {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.85rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 1rem 1.2rem;
  margin-bottom: 0.7rem;
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease;
}

.quiz-option:hover:not(:disabled) { border-color: var(--cyan); transform: translateX(4px); }

.quiz-option:disabled { cursor: default; }

.quiz-option.correct { border-color: var(--ok); background: rgba(85, 214, 138, 0.08); }
.quiz-option.wrong { border-color: var(--danger); background: rgba(255, 107, 122, 0.08); }

.quiz-feedback { margin: 1.2rem 0; }

.verdict { font-weight: 700; }
.verdict.ok { color: var(--ok); }
.verdict.ko { color: var(--danger); }

.score-figure {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  margin: 1rem 0;
}

/* --- Administration ----------------------------------------------------- */

.admin-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.8rem;
}

.admin-tabs button {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
}

.admin-tabs button:hover { color: var(--text); }

.admin-tabs button.active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.admin-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  background: var(--surface);
}

.admin-list-item .item-label { flex: 1; min-width: 0; }

.admin-list-item .item-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }

.count-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.login-card { max-width: 420px; margin: 3rem auto; }

/* --- Toast -------------------------------------------------------------- */

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-raised);
  border: 1px solid var(--cyan);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 50;
}

.toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }