:root{--bg:#0b1120;--panel:#131c2e;--border:#243049;--text:#e6ecf5;--muted:#8a99b3;--accent:#3b82f6;--accent-hover:#2563eb;--ok:#22c55e;--warn:#f59e0b}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.center-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:32px;width:100%}.center-screen .card{max-width:400px}.card h1{margin:0 0 4px;font-size:22px}.card .sub{color:var(--muted);margin:0 0 24px;font-size:14px}.card label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}input{width:100%;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:14px}input:focus{outline:none;border-color:var(--accent)}button{width:100%;margin-top:20px;padding:11px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer}button:hover{background:var(--accent-hover)}button:disabled{opacity:.6;cursor:not-allowed}.error{color:#f87171;margin-top:14px}.error,.foot{font-size:13px}.foot{margin-top:20px;color:var(--muted);text-align:center}.layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--panel);border-right:1px solid var(--border);padding:24px 16px}.sidebar .brand{font-weight:700;font-size:18px;padding:0 8px 24px}.nav-item{display:block;padding:10px 12px;border-radius:8px;color:var(--muted)}.nav-item:hover{background:var(--bg);text-decoration:none;color:var(--text)}.main{flex:1 1;padding:32px 40px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.logout{width:auto;margin:0;padding:8px 14px;background:transparent;border:1px solid var(--border);color:var(--muted);font-weight:500}.logout:hover{background:var(--panel);color:var(--text)}.empty{color:var(--muted);border:1px dashed var(--border);border-radius:12px;padding:48px;text-align:center}.opt{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:13px;cursor:pointer;text-align:left}.opt input[type=checkbox]{flex-shrink:0;width:16px;height:16px;margin:0}.opt span{flex:1 1;text-align:left}.nav-item.activo{background:var(--bg);color:var(--text)}.grupo-principal{display:block;padding:10px 12px;margin:3px 0;border-radius:8px;font-size:14px;font-weight:600;color:var(--text);text-decoration:none}.grupo-principal:hover{background:rgba(59,130,246,.12);text-decoration:none}