:root {
  color-scheme: light;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
    sans-serif;
  --bg: #f5f6fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #e0edff, var(--bg));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  color: var(--text);
}

.card {
  background: var(--card);
  border-radius: 24px;
  padding: 40px 32px;
  width: min(640px, 100%);
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
}

header {
  text-align: center;
  margin-bottom: 32px;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}

h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 12px;
}

.description {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.pix-block {
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  background: #f9fafb;
}

.label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 12px;
}

.copy {
  width: 100%;
  border: none;
  border-radius: 16px;
  padding: 20px;
  background: var(--card);
  box-shadow: inset 0 0 0 1px var(--border);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.copy:hover,
.copy:focus-visible {
  box-shadow: inset 0 0 0 2px var(--accent);
  outline: none;
  transform: translateY(-1px);
}

.pix-code {
  display: block;
  width: 100%;
  text-align: left;
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono',
    monospace;
  font-size: clamp(0.85rem, 2.6vw, 1rem);
  word-break: break-all;
  color: var(--text);
}

.copy-text {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  align-self: center;
}

.feedback {
  margin: 16px 0 0;
  min-height: 1em;
  font-size: 0.9rem;
  color: var(--muted);
}

.feedback.success {
  color: #059669;
}

.feedback.error {
  color: #dc2626;
}

@media (max-width: 480px) {
  .card {
    padding: 28px 20px;
  }

  .copy {
    padding: 16px;
  }
}