/* Page base */
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: "Segoe UI", Arial, sans-serif;
  color: #ffffff;
  background: linear-gradient(135deg, #ff4500 0%, #8b2500 40%, #1a0c00 100%);
}

/* Card */
.card {
  background: rgba(0, 0, 0, 0.7);
  padding: 32px 40px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.6);
  max-width: 420px;
  width: 90%;
}

h1 {
  margin: 0 0 10px;
  font-size: 2.6rem;
  letter-spacing: 1px;
  color: #ff9260;
  text-shadow: 0 0 8px rgba(255, 130, 80, 0.9);
}

p.subtitle {
  margin: 0 0 28px;
  font-size: 1rem;
  opacity: 0.85;
}

/* Buttons */
.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.btn {
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.5);
  color: #ffffff;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  background: #ff5b22;
  box-shadow: 0 0 10px rgba(255, 90, 30, 0.8);
  transform: translateY(-2px);
}

.hint {
  margin-top: 14px;
  font-size: 0.85rem;
  opacity: 0.75;
}

.copied {
  color: #8aff8a;
  font-weight: 600;
}