/* =====================================================
   STYLE GLOBAL – À UTILISER SUR TOUTES LES PAGES
   (index.html, publications.html, etc.)
   ===================================================== */

/* ---------- Variables globales ---------- */
:root {
  --bg-dark: #0c0c0c;
  --text-light: #f2f2f2;
  --accent-green: #00ff7f;
  --card-dark: #1a1a1a;
}

/* ---------- Reset & base ---------- */
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;
  background: var(--bg-dark);
  color: var(--text-light);
}

/* ---------- Header commun ---------- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  backdrop-filter: blur(20px);
  background: rgba(0, 0, 0, 0.6);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
}

header a:hover {
  color: var(--accent-green);
}

/* ---------- Header navigation ---------- */
header nav {
  display: flex;
  gap: 30px; /* espace entre chaque lien */
}

header nav a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

header nav a:hover {
  color: var(--accent-green);
}


/* ---------- Titres ---------- */
h1 {
  font-size: 3rem;
  text-align: center;
  margin: 40px 0;
}

h2.section-title {
  font-size: 2.5rem;
  margin: 80px 0 40px;
  text-align: center;
}

.subtitle {
  display: block;
  max-width: 900px;
  margin: 0 auto 40px auto;
  text-align: center;
  font-size: 1.2rem;
  opacity: 0.85;
  line-height: 1.5;
}

/* ---------- Projets / cartes ---------- */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  padding: 0 40px 80px;
}

.project-card,
.pub-item {
  background: var(--card-dark);
  padding: 20px;
  border-radius: 15px;
  border: 1px solid #222;
}

.project-card h3,
.pub-item h3 {
  color: var(--accent-green);
  margin-top: 0;
}

/* ---------- Publications ---------- */
.pub-list {
  max-width: 900px;
  margin: auto;
  display: flex;
  flex-direction: column;
  gap: 25px;
}

/* ---------- Bouton téléchargement ---------- */
.download-btn {
  align-self: flex-start;
  padding: 10px 20px;
  background: var(--accent-green);
  color: #000;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: 0.2s;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,255,127,0.4);
}

.download-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  position: relative;
  top: -2px;
}

/* ---------- Footer ---------- */
footer {
  text-align: center;
  padding: 40px;
  opacity: 0.6;
}