*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Inter,Arial,sans-serif;color:#0f172a;background:#f8fafc}
.topbar{position:sticky;top:0;background:#ffffff;border-bottom:1px solid #e2e8f0;display:flex;align-items:center;justify-content:space-between;padding:12px 16px}
.brand{display:flex;align-items:center;gap:10px}
.logo{height:36px}
.nav a{margin:0 8px;text-decoration:none;color:#334155;padding:8px;border-radius:8px}
.nav a.active,.nav a:hover{background:#f1f5f9}
main{max-width:1100px;margin:24px auto;padding:0 16px}
.view{display:none}
.view.visible{display:block}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:14px;padding:16px;box-shadow:0 1px 8px rgba(0,0,0,.04)}
.form{display:flex;gap:8px;margin:12px 0}
input{padding:10px;border:1px solid #cbd5e1;border-radius:10px;flex:1}
button{padding:10px 14px;border:0;border-radius:10px;background:#ec407a;color:#fff;cursor:pointer}
button:hover{opacity:.9}
ul{list-style:none;padding:0}
li{background:#fff;border:1px solid #e2e8f0;margin:6px 0;padding:10px;border-radius:10px}
.footer{text-align:center;color:#64748b;padding:40px 0}
@media (max-width:900px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}