:root{
  --bg:#08101a;
  --panel:#0f1720cc;
  --glass: rgba(255,255,255,0.06);
  --accent:#6ee7b7;
  --muted:#9aa7b8;
  --text:#e6eef8;
  --glass-border: rgba(255,255,255,0.08);
}

/* Reset & layout */
* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent; /* Désactive surbrillance tap globale WebKit */
}

html, body {
  height: 100%;
  margin: 0;
  background: linear-gradient(180deg, var(--bg), #061016);
  color: var(--text);
  font-family: Inter, system-ui, Arial, sans-serif;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* Lien style global */
a {
  color: #49c5a3;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}


/* Container */
#app {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* Pages (full viewport) */
.page {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3.5rem;
  transition: opacity 360ms ease, transform 360ms ease, visibility 360ms;
  opacity: 0;
  transform: translateY(6vh) scale(0.995);
  visibility: hidden;
  -webkit-tap-highlight-color: transparent;
}
.page.current {
  opacity: 1;
  transform: none;
  visibility: visible;
}

/* Center content */
.center {
  width: min(1100px, 94%);
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}

/* Typography */
h1 {
  font-size: 3.2rem;
  margin: 0.2rem 0 0.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
h2 {
  font-size: 2.2rem;
  margin: 0 0 0.6rem;
  font-weight: 700;
}
.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}
.meta {
  margin-top: 1.2rem;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: 1.2px solid var(--glass-border);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  margin: 0.25rem;
  box-shadow: 0 6px 18px rgba(2,6,23,0.45), inset 0 1px 0 rgba(255,255,255,0.02);
  transition: transform 160ms ease, background 200ms;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover {
  transform: translateY(-4px);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.06));
}
.btn.big {
  padding: 1rem 1.6rem;
  font-size: 1.05rem;
  border-radius: 14px;
}
.btn.primary {
  background: linear-gradient(90deg, var(--accent), #49c5a3);
  color: #042826;
  border: 0;
}
.btn.ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.06);
}

/* File list & notes */
.file-list {
  list-style: disc;
  margin: 0 auto 1rem 1.2rem;
  color: #cfe3e9;
}
.notes {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Contact extra text */
.extra {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Bottom navigation - glass bar */
#bottom-nav {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 28px;
  z-index: 40;
  padding: 6px;
  pointer-events: auto;
  backdrop-filter: blur(10px) saturate(110%);
  -webkit-backdrop-filter: blur(10px) saturate(110%);
  border-radius: 48px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(9,18,25,0.18));
  box-shadow: 0 10px 30px rgba(2,8,18,0.6);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 360px;
  max-width: 760px;
  -webkit-tap-highlight-color: transparent;
}

/* The inner list is compact, items centered */
#bottom-nav ul {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 6px 14px;
  align-items: center;
  justify-content: center;
}
.nav-item {
  padding: 10px 20px;
  border-radius: 28px;
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
  transition: background 220ms, color 220ms, transform 160ms;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}
.nav-item.active {
  background: linear-gradient(90deg, rgba(110,231,183,0.12), rgba(73,197,163,0.08));
  color: var(--accent);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}
.nav-item:hover {
  transform: translateY(-3px);
  color: var(--text);
  background: rgba(255,255,255,0.02);
}

/* === Responsive adjustments === */
@media (max-width: 820px) {
  h1 {
    font-size: 2.4rem;
  }
  #bottom-nav {
    left: 50%;
    transform: translateX(-50%);
    min-width: 300px;
    padding: 4px;
  }
  .nav-item {
    min-width: 80px;
    padding: 8px 12px;
    font-size: 0.95rem;
  }
  .readme {
    padding: 8px;
  }
}

/* Responsive */
@media (max-width: 600px) {
  /* Pages padding less on small devices */
  .page {
    padding: 1.5rem 1rem 5rem;
  }
  /* Center width smaller and text center */
  .center {
    width: 90vw;
    max-width: none;
    text-align: center;
  }
  /* Headings smaller */
  h1 {
    font-size: 1.8rem;
  }
  h2 {
    font-size: 1.3rem;
  }
  h3 {
    font-size: 1.1rem;
  }
  /* Buttons full width block */
  .btn {
    display: block;
    width: 100%;
    margin: 0.5rem 0;
    padding: 0.6rem 0;
    font-size: 0.95rem;
  }
  /* Navigation bar shrinks, smaller gaps */
  #bottom-nav {
    min-width: 260px;
    max-width: 95vw;
    padding: 4px 8px;
    bottom: 12px;
  }
  #bottom-nav ul {
    gap: 4px;
    padding: 4px 8px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .nav-item {
    min-width: 70px;
    padding: 6px 10px;
    font-size: 0.85rem;
  }

  /* Suppression animation hover flèches README en responsive */
  #readme .arrow {
    transition: none !important;
  }
  #readme .arrow:hover {
    transform: none !important;
    background: transparent !important;
    cursor: pointer;
  }

  /* Supprimer effet focus (halo vert) sur flèches README */
  #readme .arrow:focus,
  #readme .arrow:active {
    outline: none !important;
    box-shadow: none !important;
    background: transparent !important;
  }

  /* Supprime surbrillance tactile WebKit sur les flèches */
  #readme .arrow {
    -webkit-tap-highlight-color: transparent !important;
    -webkit-user-select: none; /* Empêche sélection texte par accident */
    user-select: none;
  }

  /* === Responsive pour boutons GitHub du contact === */
  #contact .btn {
    display: block !important;
    width: 100% !important;
    margin: 0.3rem 0 !important;
    box-sizing: border-box;
  }
  /* Supprime position absolute pour les boutons GitHub afin qu'ils s'empilent */
  #contact div[style*="position: relative;"] a {
    position: static !important;
  }
}

/* Saut de ligne visible uniquement sur grands écrans */
.responsive-br {
  display: inline-block;  /* comme un <br> visuel */
  content: "";
  width: 100%;
  height: 0;
}

/* Masqué sur écrans ≤600px */
@media (max-width: 600px) {
  .responsive-br {
    display: none;
  }
}