button {
  padding: 12px 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  margin: 6px 4px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #0b1224;
  box-shadow: 0 12px 30px rgba(14, 165, 233, 0.32);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgba(14, 165, 233, 0.38);
  filter: brightness(1.03);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 10px 20px rgba(14, 165, 233, 0.28);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

button.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
  box-shadow: none;
}

button.ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: none;
  filter: none;
}

button.ghost.danger {
  color: #ef4444;
  border-color: #ef4444;
}

button.ghost.danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border-color: #ef4444;
}