* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Geo', monospace;
  color: white;
  background: black;
  overflow-x: hidden;
}

/* Vidéo de fond */
.bg-video {
  position: fixed;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(14px) brightness(0.35);
  z-index: -2;
}

.bg-overlay {
  position: fixed;
  background: radial-gradient(circle at center, rgba(0,0,0,0.3), #000 80%);
  z-index: -1;
}

/* Titre */
.site-title {
  text-align: center;
  font-size: 7rem;
  letter-spacing: 0.1em;
  margin: 2rem 0 3rem;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 5%;
  top: 160px;
  width: 240px;

  border: 3px solid #6bbcff;
  padding: 1.5rem;

  background: rgba(5, 10, 20, 0.4);
  backdrop-filter: blur(2px);
}

.nav-section {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  font-size: 24px;
}

.nav-section li {
  margin: 0.4rem 0;
  cursor: pointer;
  transition: text-shadow 0.2s, opacity 0.2s;
}

.nav-section li:hover {
  opacity: 0.8;
}

.nav-section li.active {
  text-shadow: 0 0 10px currentColor;
}

.blue li { color: #6bbcff; }
.orange li { color: #ffb347; }
.red li { color: #ff6b6b; }
.purple li { color: #c77dff; }

hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.3);
  margin: 1rem 0;
}

/* Social icons */

.socials {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
}

.social {
  width: 48px;
  height: 48px;

  border: 1px solid rgba(255,255,255,0.5);
  background: rgba(0,0,0,0.3);

  display: flex;
  align-items: center;
  justify-content: center;

  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}

.social svg {
  width: 60%;
  height: 60%;
  fill: white;

  opacity: 0.85;
  transition: opacity 0.2s, transform 0.2s;
}

.social:hover svg {
  opacity: 1;
  transform: scale(1.1);
}

/* Contenu principal */
.content {
  margin-left: calc(5% + 260px + 20px);
  width: calc(90% - 260px);
  border: 3px solid #6bbcff;
  padding: 2rem;
  min-height: 60vh;
}

/* Sections */
.panel {
  display: none;
  animation: fade 0.3s ease;
}

.panel.active {
  display: block;
}

/* Vidéo centrale */
.video-frame {
  background: #0b1a33;
  padding: 1rem;
  border: 1px solid rgba(255,255,255,0.25);
}

.video-frame video {
  width: 100%;
  height: auto;
}

@keyframes fade {
  from { opacity: 0; }
  to { opacity: 1; }
}