:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, p {
  margin-top: 0;
}

.muted {
  color: var(--muted);
}

.button-link {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

.button-link:hover {
  text-decoration: none;
}