:root {
  --bg-color: #050b16;
  --deep-blue: #0a192f;
  --glass-light: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.25);
  --accent-yellow: #fcd53f;
  --accent-blue: #3ecaf8;
}

body {
  font-family: 'Noto Sans', sans-serif;
  background-color: var(--bg-color);
  background-image:
    radial-gradient(at 10% 10%, rgba(10, 25, 47, 0.8) 0px, transparent 50%),
    radial-gradient(at 90% 90%, rgba(62, 202, 248, 0.15) 0px, transparent 50%),
    linear-gradient(135deg, #050b16 0%, #1a3c6f 100%);
  color: #e6f1ff;
  min-height: 100vh;
  margin: 0;
  padding: 20px;
}

/* --- Conteneurs principaux avec Réfraction --- */
.container {
  background: rgba(10, 25, 47, 0.08);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 1;
  overflow: hidden;
  width: 80%;
  margin: 40px auto;
  padding: 40px;
}

/* Le cœur de la réfraction : seulement pour .container */
.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  filter: blur(5px) brightness(1.1) contrast(0.9);
  transform: scale(1.05) translate(-2px, -2px);
  z-index: -1;
  border-radius: inherit;
}

/* --- Footer : style simplifié (sans réfraction) pour éviter le cadre --- */
div.footer {
  background: rgba(10, 25, 47, 0.2); /* Fond un peu plus opaque pour compenser */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  /* Pas d'ombre, pas de ::before de réfraction */
  position: relative;
  width: 80%;
  margin: 40px auto;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* --- Video Container : PROPRE 16:9 --- */
.video-container {
  margin: 40px auto;
  width: 80%;
  /* IMPORTANT : On garde le ratio 16:9 et on supprime la réfraction */
  position: relative;
  overflow: hidden;
  height: 0;
  padding-bottom: 56.25%; /* Ratio 16:9 */
  border-radius: 25px;
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.5);
  /* PAS de ::before de réfraction pour ne pas casser le ratio ni créer de cadre */
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* --- Header & Logo --- */
header {
  text-align: left;
  margin-bottom: 40px;
  padding-left: 10%;
}

.logo {
  /* Logo beaucoup plus gros */
  height: 128px;
  width: 128px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 20px;
  /* Style verre */
  background: var(--glass-light);
  backdrop-filter: blur(10px);
  border-radius: 25px;
  border: 1px solid var(--glass-border);
  padding: 10px;
}

.title {
  display: inline-block;
  /* Titre ajusté en conséquence */
  font-size: 64px;
  line-height: 128px; /* Aligné sur la hauteur du logo */
  vertical-align: middle;
  color: #fff;
  font-weight: 800;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* --- Navigation (inchangé, parfait selon vos dires) --- */
.nav {
  text-align: center;
  margin: 40px 0;
}

.nav a {
  text-decoration: none;
  color: #fff;
  padding: 15px 35px;
  margin: 0 10px;
  border: 4px solid transparent;
  border-image: repeating-linear-gradient(45deg, var(--accent-yellow) 0%, var(--accent-blue) 10%, var(--accent-yellow) 20%) 1;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.3),
    inset 0 -2px 0 rgba(0, 0, 0, 0.2),
    0 5px 15px rgba(0, 0, 0, 0.3);
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  font-weight: 600;
  display: inline-block;
}

.nav a:hover {
  background-color: var(--accent-yellow);
  color: var(--deep-blue);
  border-color: transparent;
  box-shadow:
    0 0 30px var(--accent-yellow),
    inset 0 0 10px rgba(255, 255, 255, 0.5);
  transform: translateY(-3px);
  cursor: pointer;
}

/* --- Image Flash --- */
img.flash {
  display: inline-block;
  width: 128px;
  transition: 0.6s cubic-bezier(0.23, 1, 0.32, 1);
  border-radius: 15px;
  filter: drop-shadow(0 0 0px var(--accent-yellow));
}

img.flash:hover {
  width: 800px;
  filter: drop-shadow(0 10px 30px var(--accent-yellow));
}