:root {
  --bg: #0f141f;
  --card: #1c2433;
  --text: #f0f4f8;
  --muted: #a0a8b8;
  --primary: #00d4ff;
  --secondary: #ff6f61;
  --shadow: rgba(0,0,0,0.5);
  --transition: all 0.3s ease;
}

* { box-sizing:border-box; margin:0; padding:0; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

header, footer {
  background: var(--card);
  width:100%;
  box-shadow:0 4px 12px var(--shadow);
}

header {
  padding:20px 0;
  margin-bottom: 20px;
  display:flex;
  justify-content: space-between;
  align-items: center;
}

header h1 { font-size:28px; margin-left:20px; }

header nav { margin-right:20px; }
header nav a {
  color: var(--text);
  text-decoration:none;
  margin-left:18px;
  font-weight:500;
  transition: var(--transition);
}
header nav a:hover { color: var(--primary); }

footer {
  text-align:center;
  font-size:14px;
  color: var(--muted);
  margin-top:auto;
  padding:20px 0;
}

.container {
  max-width:980px;
  margin:auto;
  padding:0 16px;
  display:flex;
  flex-direction:column;
  gap:30px;
}

/* Page wrapper pour centrer accueil */
#page-wrapper {
  flex: 1;
  display: flex;
  justify-content: center; /* horizontal */
  align-items: center;     /* vertical */
  padding: 20px;
}

main.container {
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:30px;
}

/* Card général */
.card {
  background: var(--card);
  padding:25px;
  border-radius:14px;
  box-shadow: 0 8px 24px var(--shadow);
  transition: transform .3s, box-shadow .3s;
  width:100%;
  max-width:500px;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 12px 28px var(--shadow); }

.card h2 {
  margin-bottom:15px;
  color: var(--primary);
  text-align:center;
}

.grid {
  display:grid;
  grid-template-columns: repeat(auto-fit,minmax(150px,1fr));
  gap:20px;
  width:100%;
}

a.card {
  display:flex;
  justify-content:center;
  align-items:center;
  height:70px;
  font-weight:600;
  font-size:16px;
  text-decoration:none;
  color: var(--text);
  border:2px solid transparent;
  transition: var(--transition);
}
a.card:hover {
  border:2px solid var(--primary);
  transform: scale(1.05);
}

/* Form inputs */
input, select, button, textarea {
  padding:10px 14px;
  border-radius:8px;
  border:none;
  outline:none;
  background: #0b1120;
  color: var(--text);
  font-size:14px;
  transition: var(--transition);
  margin:5px 0;
  width:100%;
  box-sizing:border-box;
}
input:focus, select:focus, textarea:focus { box-shadow:0 0 8px var(--primary); }

button {
  cursor:pointer;
  background: var(--primary);
  color:#0f141f;
  font-weight:600;
  border:none;
  margin-top:10px;
}
button:hover { background: var(--secondary); color:#fff; }

pre {
  background:#0b1120;
  padding:15px;
  border-radius:8px;
  color:var(--muted);
  font-size:13px;
  white-space:pre-wrap;
  margin-top:10px;
}

/* Form spacing */
form > * { margin-bottom:10px; }

/* Intro text */
.intro { margin-bottom:30px; text-align:center; animation: fadeIn 0.8s ease; }

/* Animations */
@keyframes fadeIn {
  from { opacity:0; transform: translateY(-10px);}
  to { opacity:1; transform: translateY(0);}
}

/* Media Queries */
@media screen and (max-width:600px){
  .grid { grid-template-columns: 1fr; gap:15px; }
  header h1 { font-size:22px; }
  header nav { margin-top:10px; display:flex; justify-content:center; gap:10px; }
  .card { padding:20px; }
  input, select, button, textarea { font-size:13px; }
}