/* ===== Global ===== */
:root {
  --bg: #f4f5f7;
  --fg: #111;
  --link: #004aad;
  --card-bg: #fff;
  --card-border: #d0d4db;
  --accent: #35a854;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;
}

/* ===== Layout ===== */
.wrap { max-width: 900px; margin: 0 auto; padding: 32px; }

/* ===== Header / Nav ===== */
header { background: #fff; border-bottom: 1px solid #e6e9ef; }
header .wrap { display: flex; gap: 16px; align-items: center; justify-content: space-between; }
nav a {
  text-decoration: none;
  color: var(--fg);
  padding: 10px 8px;
  border-radius: 10px;
}
nav a:hover { background: #eef2f7; }

.brand { font-weight: 700; letter-spacing: .2px; }

/* ===== Content ===== */
a { color: var(--link); }
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px;
  margin: 16px 0;
  box-shadow: 0 2px 6px rgba(0,0,0,.06);
}
.button, button {
  display: inline-block;
  background: var(--accent);
  color: #000;
  padding: 10px 16px;
  border: 0;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

/* ===== Footer ===== */
footer { border-top: 1px solid #e6e9ef; background:#fff; }
footer p { margin: 0; padding: 24px; text-align: center; }

/* ===== Utilities ===== */
.grid { display: grid; gap: 16px; }
@media (min-width: 720px) { .grid-2 { grid-template-columns: 1fr 1fr; } }