:root{
  --bg:#0b0e12; --panel:#12171f; --border:#1e2632; --muted:#9aa6b2; --text:#e8edf5;
  --accent:#39d98a; --danger:#ff6b6b; --warn:#f5a524; --ok:#39d98a;
  --radius:16px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial;
}
.topbar{
  position:sticky; top:0; z-index:10; display:flex; align-items:center; justify-content:space-between;
  padding:14px 16px; background:rgba(11,14,18,.8); backdrop-filter: blur(8px); border-bottom:1px solid var(--border);
}
.brand{display:flex; gap:12px; align-items:center}
.logo{width:22px;height:22px;background:#24a0ed;border-radius:6px;display:grid;place-items:center;font-size:0.8rem}
.stack{display:flex; flex-direction:column}
.title{font-weight:600; font-size:15px}
.subtitle{font-size:12px; color:var(--muted)}
.controls{display:flex; gap:12px; align-items:center}
.layout-group{display:flex; gap:8px; align-items:center}
.select,.btn{
  background:var(--panel); color:var(--text); border:1px solid var(--border);
  border-radius:10px; padding:8px 10px; font-size:13px;
}
.btn{cursor:pointer}
.toolbar{display:flex; gap:8px}
.shell{max-width:1800px; margin:20px auto; padding:0 16px}
.grid{display:grid; gap:12px}

/* Layout presets */
.grid-2x2{grid-template-columns:repeat(2,1fr)}
.grid-1x4{grid-template-columns:1fr}
.grid-4x1{grid-template-columns:repeat(4,1fr)}
.grid-3x3{grid-template-columns:repeat(3,1fr)}
@media (max-width: 1100px){ .grid-4x1{grid-template-columns:repeat(2,1fr)} }
@media (max-width: 780px){ .grid-2x2,.grid-3x3{grid-template-columns:1fr} }

.card{
  background:var(--panel); border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; display:flex; flex-direction:column; min-height:300px
}
.card-header{
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 12px; border-bottom:1px solid var(--border)
}
.title-row{display:flex; align-items:center; gap:8px; min-width:0}
.title-input{
  background:transparent; border:none; color:var(--text); font-weight:600; font-size:14px; width:100%;
  outline:none
}
.badge{
  font-size:11px; border:1px solid var(--border); border-radius:999px; padding:2px 8px; color:var(--muted)
}
.badge.live{border-color:#264; color:#9f9}
.badge.health[data-health="ok"]{border-color:#264; color:#9f9}
.badge.health[data-health="warn"]{border-color:#664; color:#ffde8b}
.badge.health[data-health="down"]{border-color:#633; color:#ff9da4}

.actions{display:flex; gap:6px}
.icon-btn{
  background:transparent; border:1px solid var(--border); color:var(--text);
  width:30px; height:30px; border-radius:8px; cursor:pointer; display:grid; place-items:center; font-size:13px;
}

.card-body{position:relative; aspect-ratio:16/9; background:#000}
.player{position:absolute; inset:0; width:100%; height:100%; border:0; background:#000}

.overlay{
  position:absolute; inset:0; display:grid; place-items:center;
  background:linear-gradient(180deg, rgba(0,0,0,.6), rgba(0,0,0,.8));
}
.overlay.hidden{display:none}
.overlay-msg{color:#cbd5e1; font-size:14px}

.card-footer{
  display:flex; align-items:center; justify-content:space-between;
  padding:8px 12px; border-top:1px solid var(--border); color:var(--muted); font-size:12px
}
.foot-label{opacity:.8}
.footer{
  margin:8px 16px 20px; padding-top:10px; border-top:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between; font-size:12px; color:var(--muted)
}

/* Drag and drop affordance */
.card[draggable="true"]{user-select:none}
.card.dragging{opacity:.5; outline:2px dashed var(--border)}