body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 12%, rgba(255, 255, 255, 0.85), transparent 18%),
    radial-gradient(circle at 82% 25%, rgba(190, 240, 255, 0.85), transparent 20%),
    linear-gradient(180deg, #8ee6fb 0%, #4fc3e8 45%, #1596c6 100%);
  color: #07344c;
  font-family: "Courier New", monospace;
  text-align: center;
  overflow-x: hidden;
}

/* Grande carte centrale */
.box {
  max-width: 900px;
  margin: 18px auto;
  padding: 40px 35px;
  border-radius: 34px;

  background:
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.92) 0%,
      rgba(224, 250, 255, 0.88) 28%,
      rgba(181, 235, 246, 0.82) 65%,
      rgba(148, 222, 239, 0.85) 100%
    );

  border: 3px solid rgba(255, 255, 255, 0.9);
  box-shadow:
    inset 0 0 45px rgba(255, 255, 255, 0.65),
    inset 0 -35px 60px rgba(59, 183, 218, 0.25),
    0 0 0 4px rgba(93, 210, 240, 0.35),
    0 25px 60px rgba(0, 95, 130, 0.35);
}

/* Titre */
h1 {
  margin-top: 0;
  color: white;
  font-size: 64px;
  line-height: 0.95;
  letter-spacing: 3px;
  text-shadow:
    3px 3px 0 #159ed0,
    0 0 12px rgba(0, 130, 190, 0.85),
    0 8px 18px rgba(0, 50, 80, 0.35);
}

/* Logo */
img {
  max-width: 150px;
  border-radius: 28px;
  border: 5px solid white;
  box-shadow:
    0 0 0 4px #66cef0,
    0 15px 35px rgba(0, 80, 110, 0.35);
}

/* Les bulles de texte */
p {
  max-width: 650px;
  margin: 28px auto;
  padding: 18px 26px;

  color: #06344d;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;

  background:
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.82) 0%,
      rgba(219, 248, 255, 0.72) 48%,
      rgba(183, 232, 244, 0.82) 100%
    );

  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 18px;

  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -14px 24px rgba(76, 190, 220, 0.16),
    0 12px 28px rgba(0, 100, 135, 0.18);

  text-shadow: none;
}

/* Barre orange “site en construction” */
.marquee {
  display: inline-block;
  margin: 15px auto 35px;
  padding: 12px 28px;

  color: #5c3400;
  font-size: 18px;
  font-weight: 900;

  background:
    linear-gradient(180deg, #fff6c7 0%, #ffc04d 45%, #e88b10 100%);

  border: 3px solid white;
  border-radius: 999px;

  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.9),
    0 12px 28px rgba(120, 75, 0, 0.28);

  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.45);
}

/* Titres de sections */
h2 {
  margin: 35px auto 18px;
  padding: 10px 20px;
  max-width: 820px;

  color: white;
  font-size: 26px;
  letter-spacing: 2px;

  background:
    linear-gradient(180deg, #7feaff 0%, #18acd8 45%, #006fa8 100%);

  border: 3px solid white;
  border-radius: 999px;

  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.9),
    0 10px 25px rgba(0, 80, 120, 0.32);

  text-shadow:
    2px 2px 0 #006fa8,
    0 0 8px rgba(0, 70, 110, 0.65);
}

/* Boîte autour des liens */
.links-box {
  max-width: 650px;
  margin: 0 auto 30px;
  padding: 25px;

  background:
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.68),
      rgba(196, 239, 249, 0.78)
    );

  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 18px;

  box-shadow:
    inset 0 1px 0 white,
    0 12px 28px rgba(0, 100, 135, 0.18);
}

/* Bouton YouTube */
a {
  display: inline-block;
  padding: 13px 22px;

  color: white;
  font-weight: 900;
  text-decoration: none;

  background:
    linear-gradient(180deg, #ff9a9a 0%, #e92f3c 50%, #9d0010 100%);

  border-radius: 999px;
  border: 2px solid white;

  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.6),
    0 10px 22px rgba(150, 0, 0, 0.35);

  text-shadow: 1px 1px 0 #650000;
}

a:hover {
  transform: scale(1.05);
}