/* style.css - VSCode-like web theme with resizable right panel */
:root{
  --bg-primary:#0b1220;
  --bg-secondary:#0f1724;
  --bg-tertiary:#172033;
  --accent-blue:#3aa0ff;
  --accent-blue-dark:#0056d6;
  --text:#e6eef8;
  --muted:#99b3c6;
  --border:rgba(255,255,255,0.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial;
  background:var(--bg-primary);color:var(--text);overflow:hidden;
  display:flex;flex-direction:column;
}
/* topbar */
.topbar{
  height:56px;display:flex;align-items:center;padding:0 14px;
  background:var(--bg-secondary);border-bottom:1px solid var(--border);
}
.logo{font-weight:700;color:var(--accent-blue);margin-right:12px}
.topbar-center{flex:1;display:flex;justify-content:center}
.controls{display:flex;gap:8px}
.btn{background:transparent;border:1px solid var(--border);padding:8px 12px;border-radius:8px;color:var(--text);cursor:pointer;font-size:13px}
.btn.primary{background:linear-gradient(135deg,var(--accent-blue),var(--accent-blue-dark));border:none;color:#fff}
.btn:hover{transform:translateY(-1px)}

/* layout */
#main{flex:1;display:grid;grid-template-columns:260px 1fr 420px;min-height:0;position:relative}
#explorer{background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column}
.explorer-header{padding:12px;border-bottom:1px solid var(--border);font-size:13px;color:var(--muted)}
#files{list-style:none;padding:8px;overflow:auto;flex:1}
#files li{padding:10px;border-radius:6px;display:flex;justify-content:space-between;align-items:center;color:var(--text);cursor:pointer}
#files li .file-name{flex:1}
#files li .file-actions{margin-left:8px;display:flex;gap:6px}
#files li.active{background:rgba(58,160,255,0.08);border-left:3px solid var(--accent-blue)}
.explorer-footer{padding:10px;border-top:1px solid var(--border)}

/* editor area */
#editor-area{display:flex;flex-direction:column;background:var(--bg-primary)}
#tabs{display:flex;background:var(--bg-secondary);padding:6px;gap:6px;overflow:auto;border-bottom:1px solid var(--border)}
.tab{padding:8px 12px;border-radius:6px;background:transparent;border:1px solid transparent;display:flex;gap:8px;align-items:center;cursor:pointer}
.tab .close-btn{margin-left:8px;background:transparent;border:none;color:var(--muted);cursor:pointer}
.tab.active{background:var(--bg-primary);border-bottom:2px solid var(--accent-blue)}
.editor-host{flex:1;min-height:0}
.editor-status{height:28px;background:var(--bg-secondary);border-top:1px solid var(--border);display:flex;gap:16px;align-items:center;padding:0 12px;font-size:12px;color:var(--muted)}

/* right panel */
#right-panel{background:var(--bg-secondary);border-left:1px solid var(--border);display:flex;flex-direction:column;position:relative}
.panel-header{padding:10px;border-bottom:1px solid var(--border);color:var(--muted);font-size:12px;text-transform:uppercase;display:flex;justify-content:space-between;align-items:center}
#preview{flex:1;border:none;background:white;height:50%}
#console{padding:10px;font-family:monospace;font-size:13px;overflow:auto;flex:1;color:var(--muted);height:50%}
.panel-actions button{background:transparent;border:1px solid var(--border);padding:4px 8px;border-radius:6px;cursor:pointer;color:var(--muted)}
.resizer{width:6px;cursor:ew-resize;position:absolute;left:-3px;top:0;bottom:0;background:transparent}
.resizer:hover{background:rgba(58,160,255,0.06)}

/* responsive */
@media (max-width:1000px){
  #main{grid-template-columns:1fr;grid-template-rows:auto 1fr auto}
  #explorer,#right-panel{display:none}
}

/* utility */
.hidden{display:none !important}
.empty{padding:14px;color:var(--muted);text-align:center}