* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f7f8fb 0%, #eceff5 100%);
  color: #111827;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.08);
}

h1 {
  margin: 0 0 4px;
  font-size: 1.75rem;
}

.subtitle {
  margin: 0 0 20px;
  color: #6b7280;
  font-size: 0.95rem;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

input[type="text"] {
  width: 100%;
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 1rem;
}

#pin {
  text-align: center;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
}

.hint {
  margin: -8px 0 14px;
  color: #6b7280;
  font-size: 0.85rem;
}

.count-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

#count {
  width: 100%;
  margin-bottom: 18px;
}

button {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#join {
  background: #46178f;
  color: #ffffff;
  margin-bottom: 10px;
}

#join:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#disconnect {
  background: #f3f4f6;
  color: #111827;
}

#disconnect:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin: 16px 0 0;
  text-align: center;
  color: #4b5563;
  font-size: 0.95rem;
  min-height: 2.5rem;
}