body {
  margin:0;
  padding:0;
  min-height:100vh;
  background: linear-gradient(135deg, #f6f7f2 0%, #dcefe7 100%);
  font-family: 'Segoe UI', 'Arial', sans-serif;
  color:#333;
  display: flex;
  align-items: center;
  justify-content: center;
}
.start-container {
  background: rgba(255,255,255,0.8);
  box-shadow: 0 8px 36px #b4c0bd33;
  border-radius: 16px;
  padding: 2.2rem 2.8rem 1.6rem 2.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  width: 92vw;
  max-width: 420px;
}
h1 {
  font-size:2.5rem;
  color: #67aea0;
  margin:0;
  letter-spacing: 1px;
  font-weight: bold;
}
.desc {
  font-size: 1.15rem;
  color: #557072;
  text-align: center;
  margin: 0 0 1em 0;
}
.beta {
  font-size: 1em;
  color: #dcae5a;
  font-weight: bold;
}
.start-btn {
  padding: 1.1em 2.6em;
  background: linear-gradient(90deg, #bde1c6 40%, #9ad6cc 100%);
  color: #385550;
  border-radius: 10px;
  text-decoration: none;
  font-size: 1.14em;
  font-weight: 600;
  box-shadow: 0 2px 16px #aaa4;
  border: none;
  transition: background 0.22s, transform 0.18s;
  position: relative;
}
.start-btn:hover {
  background: linear-gradient(90deg, #8ccba1 30%, #6ec1b5 100%);
  color: #fff;
  transform: scale(1.07) translateY(-2px);
}
footer {
  text-align: center;
  font-size: 0.95em;
  color: #99aaa7;
  margin-top: .7em;
}
@media (max-width: 600px) {
  .start-container { padding:1.1rem 0.7rem; }
  h1 { font-size:2rem; }
  .desc { font-size:1em; }
}