:root{--bg: #0f172a;--bg-elev: #1e293b;--bg-elev-2: #334155;--border: #334155;--text: #e2e8f0;--text-dim: #94a3b8;--accent: #6366f1;--accent-hover: #818cf8;--danger: #ef4444;--radius: 10px;--header-h: 52px;--sidebar-w: 240px;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overflow:hidden;overscroll-behavior:none}#app,body>div{height:100%}button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}input,textarea,select{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.55rem .7rem;width:100%}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);outline-offset:-1px}.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem .85rem;border-radius:8px;background:var(--bg-elev-2);color:var(--text);font-weight:500;transition:background .12s ease}.btn:hover{background:#3f4f66}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-danger{background:transparent;color:var(--danger)}.btn-icon{padding:.35rem .5rem;border-radius:6px}.muted{color:var(--text-dim)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}