:root {
  --bg:          #f5f5f5;
  --card-bg:     #fff;
  --primary:     #111;
  --text:        #111;
  --muted:       #888;
  --radius-card: 20px;
  --radius-btn:  10px;
}

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

body {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.card {
  text-align: center;
  padding: 48px 32px;
  background: var(--card-bg);
  border-radius: var(--radius-card);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.07);
  max-width: 340px;
  width: 90%;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid color-mix(in srgb, var(--primary) 15%, transparent);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 28px;
}

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

h1 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.actions {
  display: none;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}

.btn {
  display: block;
  padding: 13px 20px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.15s;
  background: var(--primary);
  color: var(--card-bg);
}

.btn:active { opacity: 0.75; }