:root {
  --bg: #0f1320;
  --surface: #1a1f2e;
  --surface-2: #232a3d;
  --border: #2c3450;
  --text: #ecedf1;
  --text-dim: #9aa3b8;
  --accent: #d4a373;
  --accent-soft: #d4a37322;
  --success: #5bbf7d;
  --error: #e26d6d;
  --radius: 14px;
  --tab-h: 64px;
  --top-h: 56px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

input, select {
  font: inherit;
  color: inherit;
}

.hidden { display: none !important; }
.muted { color: var(--text-dim); font-size: .9rem; }

/* TOPBAR */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: calc(var(--top-h) + var(--safe-top));
  padding: var(--safe-top) 16px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
}
.topbar h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.icon-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px;
  color: var(--text-dim);
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

/* MAIN */
#app {
  padding: calc(var(--top-h) + var(--safe-top) + 16px) 16px calc(var(--tab-h) + var(--safe-bot) + 24px);
  min-height: 100vh;
}

.screen { display: none; }
.screen.active { display: block; animation: fade .25s ease; }

@keyframes fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* HOME — HERO */
.hero { margin-bottom: 28px; }
.kicker {
  margin: 0 0 4px;
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
}
.hero h2 { margin: 0 0 12px; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }

.daily { border-left: 3px solid var(--accent); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  cursor: pointer;
  transition: transform .15s, border-color .15s;
}
.card:active { transform: scale(.99); }
.card:hover { border-color: var(--accent); }
.card-cat {
  margin: 0 0 6px;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.card h3 { margin: 0 0 8px; font-size: 1.1rem; font-weight: 600; }
.card-body { margin: 0; color: var(--text-dim); font-size: .92rem; }

.section-title {
  margin: 24px 0 12px;
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 600;
}

/* GRID OF TILES */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  text-align: left;
  transition: transform .12s, border-color .15s;
  min-height: 110px;
}
.tile:active { transform: scale(.98); }
.tile:hover { border-color: var(--accent); }
.tile-emoji { font-size: 1.6rem; }
.tile-label { font-weight: 600; font-size: 1rem; }
.tile-count { color: var(--text-dim); font-size: .82rem; margin-top: auto; }
.tile.accent { background: var(--accent-soft); border-color: var(--accent); }

/* LIST */
.search-bar { margin-bottom: 16px; }
#list-search {
  width: 100%;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: none;
}
#list-search:focus { border-color: var(--accent); }

.list { list-style: none; margin: 0; padding: 0; }
.list-item {
  display: block;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color .15s;
}
.list-item:hover { border-color: var(--accent); }
.list-item-title { font-weight: 600; }
.list-item-sub { color: var(--text-dim); font-size: .85rem; margin-top: 4px; }

/* FICHE */
.fiche { max-width: 720px; margin: 0 auto; }
.fiche-cat {
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 6px;
}
.fiche h2 {
  margin: 0 0 4px;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}
.fiche-meta { color: var(--text-dim); margin: 0 0 18px; font-size: .9rem; }
#fiche-body { font-size: 1rem; line-height: 1.65; }
#fiche-body h3 { margin: 22px 0 8px; font-size: 1.05rem; color: var(--accent); }
#fiche-body p { margin: 0 0 12px; }
#fiche-body ul { padding-left: 20px; margin: 0 0 12px; }
#fiche-body li { margin-bottom: 4px; }
#fiche-body blockquote {
  border-left: 3px solid var(--accent);
  margin: 16px 0;
  padding: 4px 0 4px 14px;
  color: var(--text-dim);
  font-style: italic;
}
.fiche-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
.tag {
  font-size: .75rem;
  padding: 4px 10px;
  background: var(--surface-2);
  border-radius: 999px;
  color: var(--text-dim);
}

/* QUIZ */
.quiz-setup { display: flex; flex-direction: column; gap: 14px; max-width: 420px; margin: 0 auto; }
.quiz-setup h2 { margin: 0; }
.quiz-setup label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: .9rem;
  color: var(--text-dim);
}
.quiz-setup select {
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
}

.btn-primary {
  padding: 14px 20px;
  background: var(--accent);
  color: #1a1f2e;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  transition: filter .15s;
}
.btn-primary:active { filter: brightness(.92); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-secondary {
  padding: 12px 18px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-weight: 500;
}
.btn-secondary:hover { border-color: var(--accent); }

.quiz-play { max-width: 560px; margin: 0 auto; }
.quiz-progress { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; font-size: .85rem; color: var(--text-dim); }
.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}
#quiz-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width .3s;
}
.quiz-play h2 { font-size: 1.15rem; line-height: 1.5; margin: 0 0 18px; font-weight: 600; }

.choices { list-style: none; padding: 0; margin: 0 0 18px; display: flex; flex-direction: column; gap: 10px; }
.choice {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color .12s, background .12s;
}
.choice:hover { border-color: var(--accent); }
.choice.selected { border-color: var(--accent); background: var(--accent-soft); }
.choice.correct { border-color: var(--success); background: rgba(91, 191, 125, .14); }
.choice.wrong { border-color: var(--error); background: rgba(226, 109, 109, .14); }
.choice.disabled { cursor: default; }

.explanation {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  padding: 12px 14px;
  border-radius: 8px;
  font-size: .92rem;
  margin: 0 0 18px;
  color: var(--text-dim);
  line-height: 1.55;
}

.quiz-result { max-width: 420px; margin: 0 auto; text-align: center; }
.quiz-result h2 { font-size: 1.4rem; margin: 0 0 16px; }
.score { font-size: 3rem; font-weight: 700; margin: 0 0 8px; }
.verdict { color: var(--text-dim); margin: 0 0 24px; }
.quiz-result button { width: 100%; margin-bottom: 10px; }

/* FLASHCARDS */
.flash-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 16px 0;
}
.flash-card {
  width: 100%;
  max-width: 480px;
  min-height: 280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: transform .25s;
}
.flash-card:active { transform: scale(.99); }
.flash-front, .flash-back {
  width: 100%;
  text-align: center;
}
.flash-back { display: none; }
.flash-card.revealed .flash-front { display: none; }
.flash-card.revealed .flash-back { display: block; }
.flash-quote {
  font-size: 1.15rem;
  line-height: 1.55;
  font-style: italic;
  margin: 0 0 14px;
}
.flash-quote::before { content: "« "; color: var(--accent); }
.flash-quote::after { content: " »"; color: var(--accent); }
.flash-hint { font-size: .75rem; color: var(--text-dim); letter-spacing: .12em; text-transform: uppercase; }
.flash-author { font-weight: 700; font-size: 1.1rem; margin: 0 0 8px; color: var(--accent); }
.flash-context { color: var(--text-dim); font-size: .92rem; line-height: 1.55; margin: 0; }
.flash-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 16px;
}
.flash-controls button { width: 56px; }

/* TABBAR */
.tabbar {
  position: fixed;
  inset: auto 0 0 0;
  height: calc(var(--tab-h) + var(--safe-bot));
  padding: 0 0 var(--safe-bot);
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  z-index: 100;
}
.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--text-dim);
  font-size: .72rem;
  font-weight: 500;
  transition: color .12s;
}
.tab.active { color: var(--accent); }
.tab svg { transition: stroke .12s; }

/* RESPONSIVE — larger screens */
@media (min-width: 720px) {
  #app { padding-left: 24px; padding-right: 24px; max-width: 920px; margin: 0 auto; }
  .grid { grid-template-columns: repeat(4, 1fr); }
}