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

body {
  margin: 0;
  min-height: 100dvh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: #1a1a1a;
  background: #f4f4f5;
}

.wrap {
  max-width: 28rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 650;
}

.hint {
  margin: 0 0 1.25rem;
  font-size: 0.875rem;
  color: #52525b;
}

textarea {
  display: block;
  width: 100%;
  padding: 0.75rem 0.875rem;
  border: 1px solid #d4d4d8;
  border-radius: 0.5rem;
  background: #fff;
  resize: vertical;
  font: inherit;
}

textarea:focus {
  outline: 2px solid #2563eb;
  outline-offset: 1px;
  border-color: #2563eb;
}

.input-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.err {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: #b91c1c;
}

.qr-box {
  margin: 1.5rem 0 0;
  padding: 1rem;
  background: #fff;
  border-radius: 0.75rem;
  border: 1px solid #e4e4e7;
  text-align: center;
}

#qr {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.btn {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.5rem;
  background: #2563eb;
  color: #fff;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}

.input-actions .btn {
  margin-top: 0;
}

.btn-secondary {
  background: #fff;
  color: #1a1a1a;
  border: 1px solid #d4d4d8;
}

.btn-secondary:hover {
  background: #f4f4f5;
}

.btn:hover {
  background: #1d4ed8;
}

.btn-secondary:hover {
  background: #f4f4f5;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn:disabled:hover {
  background: inherit;
}

.btn-secondary:disabled:hover {
  background: #fff;
}

.btn:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #fafafa;
    background: #18181b;
  }

  .hint {
    color: #a1a1aa;
  }

  textarea {
    background: #27272a;
    border-color: #3f3f46;
    color: inherit;
  }

  .qr-box {
    background: #27272a;
    border-color: #3f3f46;
  }

  .btn-secondary {
    background: #27272a;
    color: inherit;
    border-color: #3f3f46;
  }

  .btn-secondary:hover {
    background: #3f3f46;
  }

  .btn-secondary:disabled:hover {
    background: #27272a;
  }
}