:root{--bg:#eaf7ff;--card:#fff;--ink:#1d1f3a;--muted:#5a5f7a;--accent:#2fb84a;--line:#d7e6f2}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:linear-gradient(180deg,#bfe9ff 0%,#eaf7ff 100%);color:var(--ink);line-height:1.6}
.wrap{max-width:760px;margin:0 auto;padding:40px 20px 60px}
header{display:flex;align-items:center;gap:14px;margin-bottom:28px}header .logo{width:56px;height:56px;border-radius:14px;background:var(--accent);display:grid;place-items:center;color:#fff;font-size:28px;font-weight:800;box-shadow:0 4px 0 #1d1f3a}
header h1{margin:0;font-size:1.6rem}header p{margin:0;color:var(--muted)}
nav a{margin-right:16px;color:#1b6fb3;text-decoration:none;font-weight:600}nav a:hover{text-decoration:underline}
.card{background:var(--card);border:2px solid var(--ink);border-radius:16px;padding:24px 26px;box-shadow:0 6px 0 var(--ink);margin:22px 0}
h2{margin-top:0;font-size:1.25rem}h3{margin-bottom:6px}
ul{padding-left:20px}footer{color:var(--muted);font-size:.9rem;margin-top:30px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:10px 18px;border-radius:12px;border:2px solid var(--ink);box-shadow:0 4px 0 var(--ink);text-decoration:none;font-weight:700}