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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, sans-serif;
  color: #00ff9f;
  background: #000;
}

#matrix {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 30px 40px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 16px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(0, 255, 159, 0.25);
  max-width: 420px;
  width: 90%;
}

.logo {
  width: 160px;
  height: auto;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 10px #00ff9f);
}

h1 {
  font-size: 1.8rem;
  letter-spacing: 1px;
  margin-bottom: 6px;
  text-shadow: 0 0 8px #00ff9f;
}

.subtitle {
  color: #a0ffd0;
  margin-bottom: 18px;
  font-size: 0.95rem;
  opacity: 0.9;
}

.count {
  margin-bottom: 16px;
  font-family: monospace;
  color: #00ff9f;
  min-height: 1.2em;
  font-size: 0.95rem;
}

#startBtn {
  background: transparent;
  border: 2px solid #00ff9f;
  color: #00ff9f;
  padding: 10px 28px;
  font-size: 1rem;
  letter-spacing: 1.5px;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s;
}

#startBtn:hover {
  background: #00ff9f;
  color: #000;
  box-shadow: 0 0 15px #00ff9f;
}