/* assets/style.css - giao diện đơn giản, dashboard */
:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --accent:#2563eb;
  --muted:#6b7280;
  --radius:10px;
  --maxw:980px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}
*{box-sizing:border-box}
body{background:var(--bg); color:#111827; margin:0; padding:24px; display:flex; justify-content:center;}
.container{width:100%; max-width:var(--maxw);}

.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.h-title{display:flex;gap:12px;align-items:center}
.h-title h1{font-size:20px;margin:0}
.h-sub{color:var(--muted);font-size:13px}

.card{background:var(--card); padding:16px;border-radius:var(--radius); box-shadow:0 6px 18px rgba(15,23,42,0.06);}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-top:14px}

.room-card{position:relative; overflow:hidden;border-radius:8px;min-height:140px; display:flex; flex-direction:column; justify-content:flex-end; color:white; padding:12px;}
.room-card .overlay{position:absolute;inset:0;background:linear-gradient(180deg, rgba(0,0,0,0.0), rgba(0,0,0,0.45));}
.room-info{position:relative; z-index:2}
.room-info h3{margin:0 0 6px 0;font-size:16px}
.room-info p{margin:0;font-size:13px;color:rgba(255,255,255,0.9)}

.btn{display:inline-block;padding:8px 12px;border-radius:8px;background:var(--accent);color:white;text-decoration:none;font-size:14px}
.btn.secondary{background:#efefef;color:#111}
.small{font-size:13px;padding:6px 8px;border-radius:6px}

.admin-panel{display:flex;gap:12px;flex-wrap:wrap}
.form{flex:1;min-width:320px}

.form label{display:block;font-size:13px;margin-top:8px;color:var(--muted)}
.form input[type="text"], .form textarea{width:100%; padding:8px;border-radius:6px;border:1px solid #e5e7eb;margin-top:6px}
.form textarea{min-height:100px; resize:vertical}
.actions{margin-top:10px;display:flex;gap:8px;align-items:center}

.list{width:320px;max-height:540px;overflow:auto}
.list .item{display:flex;gap:8px;align-items:center;padding:8px;border-bottom:1px solid #f3f4f6}
.list .item img{width:56px;height:40px;object-fit:cover;border-radius:6px}
.meta{flex:1}
.meta h4{margin:0;font-size:14px}
.meta p{margin:0;font-size:12px;color:var(--muted)}

.note{font-size:13px;color:var(--muted);margin-top:8px}

/* login */
.login-box{max-width:420px;margin:36px auto;padding:18px}
.login-box h2{margin:0 0 10px 0}

/* responsive */
@media (max-width:720px){
  .header{flex-direction:column;align-items:flex-start;gap:8px}
  body{padding:14px}
}