* { box-sizing: border-box; margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #f4f6f8; color: #1c2733;
  min-height: 100vh;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 24px 16px; }
.card {
  background: #fff; border: 1px solid #e2e8f0; border-radius: 12px;
  padding: 24px; box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
h1 { font-size: 1.4rem; margin-bottom: 4px; }
.sub { color: #5b6b7b; margin-bottom: 20px; font-size: .95rem; }
button {
  background: #16a34a; color: #fff; border: 0; border-radius: 8px;
  padding: 10px 18px; font-size: 1rem; cursor: pointer;
}
button:hover { background: #15803d; }
button:disabled { background: #9ca3af; cursor: wait; }
button.ghost { background: #fff; color: #1c2733; border: 1px solid #cbd5e1; padding: 6px 12px; font-size: .85rem; }
button.ghost:hover { background: #f1f5f9; }
button.danger { background: #fff; color: #b91c1c; border: 1px solid #fecaca; padding: 6px 12px; font-size: .85rem; }
input[type=password], input[type=text] {
  width: 100%; padding: 10px 12px; border: 1px solid #cbd5e1; border-radius: 8px;
  font-size: 1rem; margin-bottom: 14px;
}
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid #eef2f6; vertical-align: top; }
th { color: #5b6b7b; font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; }
.badge.pendiente { background: #e2e8f0; color: #475569; }
.badge.conectado { background: #dcfce7; color: #166534; }
.badge.atencion { background: #fef3c7; color: #92400e; }
.badge.error { background: #fee2e2; color: #991b1b; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.msg { margin-top: 14px; color: #b91c1c; min-height: 1.2em; }
.ok { color: #166534; }
.small { font-size: .8rem; color: #5b6b7b; }
.center { text-align: center; }
.big-icon { font-size: 3rem; margin-bottom: 12px; }