:root {
  --acc: #d9605a;
  --acc2: #4ea7a1;
  --line: #c9ced6;
  --card: #f6f7fa;
  --text: #111;
}

body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f8fafc;
  color: var(--text);
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px;
}

.site-header,
.site-footer {
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.tile {
  display: block;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  transition: 0.2s;
}

.tile:hover {
  border-color: var(--acc);
}

.frac {
  display: inline-block;
  vertical-align: middle;
  text-align: center;
  font-size: 1.1em;
}

.frac .num {
  display: block;
  border-bottom: 1px solid var(--text);
  padding: 0 2px;
}

.frac .den {
  display: block;
  padding: 0 2px;
}

.btn {
  padding: 8px 14px;
  background: var(--acc);
  border: none;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
}

.btn.ghost {
  background: transparent;
  border: 1px solid var(--acc);
  color: var(--acc);
}