:root {
  --bg: #0f172a; --card: #1e293b; --txt: #e2e8f0; --accent: #38bdf8;
  --muted: #94a3b8; --border: #334155; --danger: #f87171; --ok: #34d399;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--txt); min-height: 100vh;
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.card {
  background: var(--card); border-radius: 16px; padding: 36px; width: 100%;
  max-width: 420px; box-shadow: 0 10px 40px rgba(0,0,0,.4);
}
.card.wide { max-width: 560px; text-align: center; }
h1 { margin: 0 0 4px; font-size: 1.5rem; }
.sub { color: var(--muted); font-size: .9rem; margin: 0 0 24px; }
label { display: block; font-size: .85rem; margin: 14px 0 6px; color: var(--muted); }
input[type=text], input[type=email], input[type=password] {
  width: 100%; padding: 11px 13px; border-radius: 9px; border: 1px solid var(--border);
  background: #0b1220; color: var(--txt); font-size: 1rem;
}
input:focus { outline: 2px solid var(--accent); border-color: transparent; }
button {
  width: 100%; margin-top: 20px; padding: 12px; border: 0; border-radius: 9px;
  background: var(--accent); color: #04263a; font-weight: 600; font-size: 1rem; cursor: pointer;
}
button:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.link { color: var(--accent); text-decoration: none; }
.foot { margin-top: 18px; font-size: .85rem; color: var(--muted); text-align: center; }
.alert { padding: 11px 13px; border-radius: 9px; font-size: .9rem; margin-bottom: 8px; }
.alert.err { background: rgba(248,113,113,.12); color: var(--danger); border: 1px solid rgba(248,113,113,.3); }
.alert.ok  { background: rgba(52,211,153,.12); color: var(--ok); border: 1px solid rgba(52,211,153,.3); }
.badge { display: inline-block; background: rgba(56,189,248,.15); color: var(--accent);
  padding: 4px 12px; border-radius: 999px; font-size: .8rem; margin-bottom: 14px; }
.qr { background: #fff; padding: 12px; border-radius: 12px; display: inline-block; margin: 12px 0; }
.secret { font-family: ui-monospace, monospace; background: #0b1220; border: 1px solid var(--border);
  padding: 8px 10px; border-radius: 8px; word-break: break-all; font-size: .85rem; }
.stack { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 18px; }
.chip { background: #0b1220; border: 1px solid var(--border); padding: 6px 12px; border-radius: 8px; font-size: .85rem; }
.row { display: flex; gap: 10px; }
.row > * { flex: 1; }

/* Menú de accesos (dashboard) */
.menu { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
.tile { display: flex; align-items: center; gap: 10px; padding: 14px; border-radius: 10px;
  background: #0b1220; border: 1px solid var(--border); color: var(--txt);
  text-decoration: none; font-weight: 500; }
.tile:hover { border-color: var(--accent); }
.tile span { font-size: 1.4rem; }

/* Listas y tablas */
.list { list-style: none; padding: 0; margin: 18px 0 0; text-align: left; }
.list li { padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 8px; background: #0b1220; }
.list a { color: var(--txt); text-decoration: none; }
table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: .9rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }

/* Barra de progreso */
.bar { background: #0b1220; border: 1px solid var(--border); border-radius: 999px;
  height: 10px; overflow: hidden; margin-top: 6px; }
.bar > i { display: block; height: 100%; background: var(--accent); }
.muted { color: var(--muted); font-size: .85rem; }
.section { text-align: left; margin-top: 26px; border-top: 1px solid var(--border); padding-top: 18px; }
.section h2 { font-size: 1.05rem; margin: 0 0 10px; }
.tag { font-size: .72rem; padding: 2px 8px; border-radius: 999px; }
.tag.on { background: rgba(52,211,153,.15); color: var(--ok); }
.tag.off { background: rgba(148,163,184,.15); color: var(--muted); }
.topbar { display:flex; justify-content:space-between; align-items:center; margin-bottom: 8px; }
.topbar a { color: var(--accent); text-decoration: none; font-size: .9rem; }
input[type=number], textarea, select {
  width: 100%; padding: 10px 12px; border-radius: 9px; border: 1px solid var(--border);
  background: #0b1220; color: var(--txt); font-size: .95rem; font-family: inherit; }
textarea { min-height: 70px; resize: vertical; }
button.small { width: auto; margin: 0; padding: 7px 14px; font-size: .85rem; }