body {
  font-family: 'Segoe UI', Arial, sans-serif;
  font-size: 1.5rem;
  background: url("background.jpg") no-repeat center center fixed;
  background-size: cover;
  margin: 0;
  min-height: 100vh;
  color: #222;
  overflow-x: hidden;
}

.link {
  text-align: center;
  margin-top: 2rem;
}

.link img {
  width: 36px;
  vertical-align: middle;
  filter: grayscale(0.3);
  transition: filter 0.2s;
}

.link img:hover {
  filter: grayscale(0) drop-shadow(0 0 6px #228B22);
}

.center {
  background: rgba(255, 255, 255, 0.18);
  box-shadow:
    0 28px 56px 0 rgba(0, 0, 0, 0.55),     /* Strong, deep black bottom shadow */
    -18px 0 36px -8px rgba(0, 0, 0, 0.22), /* More pronounced left shadow */
    18px 0 36px -8px rgba(0, 0, 0, 0.22);  /* More pronounced right shadow */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  max-width: 400px;
  margin: 60px auto 0;
  padding: 2.5rem 2rem 2rem;
  text-align: center;
}

h4 {
  color: #222;
  margin-bottom: 0.7rem;
  letter-spacing: 2px;
  font-weight: 600;
}

.counter-display, h1 {
  color: #228B22;
  font-size: 3rem;
  margin: 1.2rem 0;
  font-weight: bold;
}

button, .counter-btn {
  height: 40px;
  min-width: 120px;
  background-color: #0d2c54;
  color: #fff;
  border: none;
  border-radius: 6px;
  margin: 0.5rem;
  font-size: 1.1rem;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(39,39,47,0.10);
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

button:active, .counter-btn:active {
  background-color: #092043;
  transform: scale(0.97);
}

button:focus, .counter-btn:focus {
  outline: 2px solid #228B22;
  outline-offset: 2px;
}