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

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #f5f5f5;
  background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
}

.logo {
  font-size: 3.2rem;
  letter-spacing: 2px;
  font-weight: 300;
}

.logo span {
  color: #4bc2c5;
  font-weight: 600;
}

.tagline {
  margin-top: 12px;
  font-size: 1.1rem;
  opacity: 0.85;
}

button {
  margin-top: 32px;
  padding: 12px 28px;
  font-size: 1rem;
  border: none;
  border-radius: 50px;
  background: #4bc2c5;
  color: #0f2027;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s;
}

button:hover {
  transform: translateY(-2px);
  background: #5fd0d3;
}

#message {
  margin-top: 16px;
  min-height: 1.4em;
  font-style: italic;
  opacity: 0;
  transition: opacity 0.5s;
}

footer {
  margin-top: 60px;
  font-size: 0.85rem;
  opacity: 0.6;
}