:root{
  --green:#22c55e;        /* header + primary buttons */
  --greenDark:#16a34a;    /* hover */
  --ink:#062436;          /* text */
  --bg:#f5fdf8;           /* page background (mint) */
  --card:#ffffff;         /* cards */
  --line:#e7eef9;         /* subtle borders */
}
*{box-sizing:border-box}
body{font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);margin:0}
header{background:var(--green);color:#fff;text-align:center;padding:1.2rem 0;font-size:1.6rem;font-weight:800}
main{max-width:960px;margin:1.5rem auto 2.5rem;padding:0 1.2rem}
h1,h2,h3{margin:.2rem 0 .6rem}
a{color:inherit}
.btn{display:inline-block;border:none;padding:.7rem 1rem;border-radius:14px;font-size:1rem;cursor:pointer;transition:.15s;text-decoration:none}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 6px 20px rgba(34,197,94,.3)}
.btn-primary:hover{background:var(--greenDark)}
.btn-ghost{background:#fff;border:1px solid #e5e7eb;color:var(--ink)}
.btn-ghost:hover{background:#ffffffcc}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:0 6px 18px rgba(2,23,34,.05)}
footer{margin:28px 0 40px;text-align:center;font-size:.95rem;opacity:.9}
footer a{color:inherit}