body {
  background: #111;
  color: #fff;
  font-family: Arial, sans-serif;
  padding: 40px;
}

.box {
  max-width: 700px;
  margin: 0 auto;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 18px;
  padding: 30px;
  background: url('../bilder/bg-main.png') center/cover no-repeat;
  position: relative;
}

.box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
}

.box * {
  position: relative;
  z-index: 1;
}

h1 {
  margin-top: 20px;
}

.header-block {
  text-align: center;
  margin-bottom: 30px;
}

.demo-label {
  font-size: 13px;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
}

.header-subline {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  margin-top: 10px;
}

.grid {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 25px;
}

.card {
  display: block;
  padding: 15px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
  text-align: center;
  text-decoration: none;
  color: #fff;
  transition: all 0.2s;
}

.card:hover {
  background: rgba(255,255,255,0.05);
  border-color: #fff;
}
.back-btn {
  display: inline-block;
  padding: 10px 22px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 10px;
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  transition: all 0.25s ease;
}

.back-btn:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.05);
}
.center-title {
  text-align: center;
}

.card {
  cursor: pointer;
}

.card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.75);
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(255,255,255,0.08);
}