:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,'Helvetica Neue',Arial;color:#222}
body{margin:0;padding:0;background:#f6f7fb}
header{background:#4064f5;color:#fff;padding:20px 24px}
.container{max-width:1000px;margin:20px auto;padding:0 16px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.card{background:#fff;border-radius:8px;padding:16px;box-shadow:0 6px 18px rgba(20,30,80,0.06)}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0 0 12px;color:#555}
.btn{display:inline-block;padding:8px 12px;border-radius:6px;text-decoration:none;color:#fff;background:#4064f5;border:none;cursor:pointer}
nav a{color:#fff;margin-right:12px;text-decoration:none}
footer{padding:16px;text-align:center;color:#666}
.small{font-size:13px;color:#888}

/* listing/detail styles */
body{color:#222}
.list{display:grid;gap:12px}
.item{background:#fff;padding:12px;border-radius:8px;box-shadow:0 6px 18px rgba(20,30,80,0.06);display:flex;justify-content:space-between}
.meta{color:#666;font-size:13px}
.toprow{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.filter{display:flex;gap:8px}

.purchase-btn{background:#20a020}
.feedback-btn{background:#ff8c42}

/* modal root basic reset */
#modalRoot .modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,0.4);display:flex;align-items:center;justify-content:center;z-index:9999}
#modalRoot .modal-card{background:#fff;padding:18px;border-radius:10px;min-width:320px;max-width:92%}