/* Reset rapide */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: #f5f5f5;
  background: #000;
}

/* Vidéo hero en fond */
.hero-video {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.videos-container {
  margin-top: 380px; /* ajuste selon ta hauteur du hero */
}

/* Coquille de page par-dessus la vidéo */
.page-shell {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* Header + bannière */
.site-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  letter-spacing: 0.03em;
}

.site-header .sub {
  margin: 0.5rem 0 1rem;
  font-size: 0.95rem;
  color: #c0ffc0;
}

.banner {
  margin: 0 auto 1.5rem;
  max-width: 960px;
  border-radius: 12px;

}

.banner img {
  display: block;
  width: 50%;
  height: auto;
  margin-left: auto;
  margin-right: auto;
  margin-top: 40px; /* teste 40, 60, 80 selon ton ressenti */
  animation: irradiate 3s ease-in-out infinite;
}

/* Intro */
.intro {
  font-family: 'Orbitron', sans-serif;
  line-height: 1.7;
  font-size: 1.05rem;
  color: #ddd;            /* gris clair lisible */
  max-width: 760px;       /* largeur idéale pour un long texte */
  margin: 40px auto 60px; /* centre + espace autour */
  padding: 0 20px;        /* petit padding pour mobile */
  text-align: justify;    /* ou "center" si tu préfères */
}
.intro strong {
  color: #9ef78a;         /* petit accent vert ufomotion */
}


/* Vidéos */
.videos-container iframe {
  width: 100%;
  max-width: 640px;
  height: 360px;
  display: block;
  margin: 1.5rem auto;
  border: none;

  /* Glow bleu autour de la vidéo */
  box-shadow:
    0 0 20px rgba(0, 150, 255, 0.6),
    0 0 40px rgba(0, 150, 255, 0.35),
    0 0 60px rgba(0, 150, 255, 0.20);

  opacity: 0.92;
  mix-blend-mode: screen;
  transition: opacity 0.2s ease, box-shadow 0.3s ease;
}

.videos-container iframe:hover {
  opacity: 1;
  box-shadow:
    0 0 25px rgba(0, 170, 255, 0.8),
    0 0 55px rgba(0, 170, 255, 0.5),
    0 0 80px rgba(0, 170, 255, 0.35);
}

.video-title {
  text-align: center;
  color: #e0e0e0;
  font-family: "Orbitron", system-ui;
  font-size: 1rem;
  margin: 40px 0 10px;
  letter-spacing: 1px;
  opacity: 0.9;
}


@keyframes irradiate {
  0% {
    filter:
      drop-shadow(0 0 15px #00c8ff)
      drop-shadow(0 0 35px #00a4ff)
      drop-shadow(0 0 55px #007fff);
  }

  50% {
    filter:
      drop-shadow(0 0 30px #39e0ff)
      drop-shadow(0 0 70px #00b3ff)
      drop-shadow(0 0 110px #0082ff);
  }

  100% {
    filter:
      drop-shadow(0 0 15px #00c8ff)
      drop-shadow(0 0 35px #00a4ff)
      drop-shadow(0 0 55px #007fff);
  }
}

.scroll-buttons {
  position: fixed;
  left: 50%;
  bottom: 40px;  /* pas trop bas */
  transform: translateX(-50%);
  display: flex;
  flex-direction: row; /* boutons côte à côte */
  gap: 12px;
  z-index: 9999;
}

.scroll-buttons button {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid #00c8ff;
  background: rgba(0, 0, 0, 0.65);
  color: #e8faff;
  font-size: 1.3rem;
  cursor: pointer;
  transition: 
    transform 0.15s ease, 
    box-shadow 0.15s ease, 
    background 0.15s ease;
}

.scroll-buttons button:hover {
  background: rgba(0, 40, 80, 0.95);
  box-shadow: 0 0 12px #00c8ff;
  transform: translateY(-2px);
}

.intro .source {
  display: block;
  text-align: center;
  margin-top: 1rem;
  font-size: 0.95rem;
  opacity: 0.85;
}

.intro .source a {
  color: #66d9ff;
  text-decoration: none;
}

.intro .source a:hover {
  text-decoration: underline;
}