:root{
  --bg: #ffffff;
  --text: #111111;
  --primary: #f5c400; /* yellow */
  --accent: #000000; /* black */
  --card: #ffffff;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0b0b;
    --text: #f5f5f5;
    --card: #111111;
  }
}
*{box-sizing:border-box;font-family:Poppins,system-ui,-apple-system,Segoe UI,Roboto,'Helvetica Neue',Arial}
html,body,#wp-edu-app-root{height:100%;margin:0;padding:0}
body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}
.app-wrap{max-width:1100px;margin:28px auto;padding:16px}
.header{display:flex;align-items:center;justify-content:space-between;gap:12px}
.title{font-size:1.6rem;font-weight:700;color:var(--accent)}
.controls{display:flex;gap:8px;align-items:center}
.btn{background:var(--accent);color:var(--primary);border:none;padding:8px 12px;border-radius:8px;font-weight:600;cursor:pointer}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid rgba(0,0,0,0.06)}
.layout{display:grid;grid-template-columns:1fr 420px;gap:18px;margin-top:18px}
.card{background:var(--card);border-radius:12px;padding:14px;box-shadow:0 6px 18px rgba(0,0,0,0.06)}
.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}
input[type=text],textarea{width:100%;padding:10px;border-radius:8px;border:1px solid #ddd;background:transparent;color:var(--text)}
.list-item{display:flex;flex-direction:column;gap:6px;padding:10px;border-radius:8px;border:1px solid rgba(0,0,0,0.05);cursor:pointer}
.list-item h4{margin:0;color:var(--accent)}
.detail{padding:8px}
.list-item img{width:100%;height:140px;object-fit:cover;border-radius:8px;margin-bottom:8px}

/* Hero / feature cards similar to attached design */
.hero-cards{display:flex;gap:16px;margin:18px 0;padding:18px;background:linear-gradient(180deg,rgba(0,0,0,0.02),transparent);border-radius:14px}
.feature-card{flex:1;background:var(--card);border-radius:12px;padding:18px;box-shadow:0 6px 18px rgba(0,0,0,0.04);border:1px solid rgba(0,0,0,0.06);display:flex;flex-direction:column;justify-content:space-between;min-height:160px}
.feature-card.selected{outline:3px solid var(--primary);}
.feature-card .fc-top{display:flex;gap:12px;align-items:flex-start}
.feature-card .fc-title{font-size:1.1rem;font-weight:700;color:var(--accent);margin-bottom:6px}
.feature-card .fc-desc{color:rgba(0,0,0,0.6);font-size:0.95rem}
.feature-card .fc-action{align-self:flex-end;margin-top:12px}
.feature-cta{width:36px;height:36px;border-radius:50%;background:linear-gradient(180deg,var(--primary),#e6b600);display:flex;align-items:center;justify-content:center;color:var(--accent);box-shadow:0 4px 10px rgba(0,0,0,0.08)}

/* Responsive */
@media (max-width:900px){
  .layout{grid-template-columns:1fr;}
  .controls{flex-wrap:wrap}
  .hero-cards{flex-direction:column}
}

/* theme toggle */
.theme-toggle{display:flex;align-items:center;gap:8px}