/* CTF Hub Sandbox - Minimal Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

/* Loading Screen */
.loading-screen {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f172a;
}

.loading-content {
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(0, 132, 199, 0.2);
  border-top-color: #0084C7;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-size: 1.125rem;
  font-weight: 500;
  color: #f8fafc;
  margin-bottom: 0.5rem;
}

.loading-subtext {
  font-size: 0.875rem;
  color: #64748b;
}

/* Error Screen */
.error-screen {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f172a;
  padding: 2rem;
}

.error-content {
  max-width: 420px;
  text-align: center;
  background: #1e293b;
  border-radius: 16px;
  padding: 2.5rem;
  border: 1px solid #334155;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.error-content h2 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: #f8fafc;
}

.error-content p {
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.error-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: #0084C7;
  color: white;
}

.btn-primary:hover {
  background: #0073b1;
}

.btn-secondary {
  background: #334155;
  color: #e2e8f0;
}

.btn-secondary:hover {
  background: #475569;
}

/* Sandbox Container */
.sandbox-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.sandbox-frame {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
}