* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  background: radial-gradient(circle at center, #111 0%, #000 70%);
  font-family: "Segoe UI", sans-serif;
  overflow: hidden;
}

/* ========== MENUS ========== */
.menu {
  position: fixed;
  background: rgba(255, 140, 0, 0.09);
  border: 1px solid #ff8c00;
  color: #ffae42;
  text-align: center;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.35s ease;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 15px rgba(255, 140, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== MENU HAUT ===== */
.menu-top {
  top: 0;
  left: 50%;
  width: 90%;
  height: 40px;
  transform: translateX(-50%);
  border-radius: 0 0 16px 16px;
}
.menu-top:hover {
  height: 160px;
}

/* ===== MENU BAS ===== */
.menu-bottom {
  bottom: 0;
  left: 50%;
  width: 90%;
  height: 40px;
  transform: translateX(-50%);
  border-radius: 16px 16px 0 0;
}
.menu-bottom:hover {
  height: 160px;
}

/* ===== MENU GAUCHE ===== */
.menu-left {
  top: 50%;
  left: 0;
  width: 40px;
  height: 90%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border-radius: 0 16px 16px 0;
}
.menu-left:hover {
  width: 220px;
}

/* ===== MENU DROIT ===== */
.menu-right {
  top: 50%;
  right: 0;
  width: 40px;
  height: 90%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border-radius: 16px 0 0 16px;
}
.menu-right:hover {
  width: 220px;
}

/* ========== COINS FUTURISTES ========== */
.corner {
  position: fixed;
  width: 26px;
  height: 26px;
  pointer-events: auto;
  transition:
    transform 0.4s ease,
    filter 0.4s ease;
  background: #111; /* couleur interne du carré */
  border: 2px solid #ff8c00;
  box-shadow: 0 0 10px rgba(255, 140, 0, 0.6);
}

/* Arrondis côté coin de l'écran */
.corner.tl { border-radius: 8px 0 0 0; top: 12px; left: 12px; }
.corner.tr { border-radius: 0 8px 0 0; top: 12px; right: 12px; }
.corner.bl { border-radius: 0 0 0 8px; bottom: 12px; left: 12px; }
.corner.br { border-radius: 0 0 8px 0; bottom: 12px; right: 12px; }

/* Hover stylisé */
.corner:hover {
  transform: scale(1.2) rotate(8deg);
  filter: drop-shadow(0 0 12px rgba(255, 160, 60, 0.9));
  background: #222;
  border-color: #ffae42;
  box-shadow: 0 0 18px rgba(255, 170, 80, 1);
}