:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --border: #e7e9f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #4f46e5;
  --primary-soft: #eef2ff;
  --green: #059669;
  --green-soft: #ecfdf5;
  --red: #dc2626;
  --red-soft: #fef2f2;
  --amber: #b45309;
  --amber-soft: #fffbeb;
  --blue: #2563eb;
  --blue-soft: #eff6ff;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);
  --sidebar: 248px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
svg.i { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* ---------- layout ---------- */
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: var(--sidebar); background: var(--surface);
  border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 20px 14px; z-index: 20;
  transition: transform .2s ease;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 10px 22px; font-weight: 700; font-size: 16px; letter-spacing: -.01em; }
.brand .logo { width: 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg, #6366f1, #4f46e5); color: #fff; display: grid; place-items: center; }
.brand small { display: block; font-weight: 500; font-size: 12px; color: var(--muted); }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a, .nav button {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 10px; color: var(--muted);
  font-weight: 500; font-size: 14px; border: 0; background: none; cursor: pointer; text-align: left; width: 100%; font-family: inherit;
}
.nav a:hover, .nav button:hover { background: var(--bg); color: var(--text); }
.nav a.active { background: var(--primary-soft); color: var(--primary); }
.nav .spacer { flex: 1; }
.sidebar .bottom { margin-top: auto; border-top: 1px solid var(--border); padding-top: 12px; }
.user-chip { font-size: 12px; color: var(--muted); padding: 4px 12px 8px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.main { margin-left: var(--sidebar); padding: 28px 32px 48px; min-height: 100vh; max-width: calc(1280px + var(--sidebar)); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.topbar h1 { font-size: 22px; margin: 0; letter-spacing: -.02em; }
.topbar p { margin: 2px 0 0; color: var(--muted); }
.btn.menu-btn { display: none; }

/* ---------- componentes ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.card-h h2 { font-size: 15px; margin: 0; }
.card-b { padding: 20px; }
.grid { display: grid; gap: 16px; }
.stats { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 16px; }
.two { grid-template-columns: 2fr 1fr; }
.stat { padding: 18px 20px; display: flex; gap: 14px; align-items: center; }
.stat .ic { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; }
.stat .v { font-size: 24px; font-weight: 700; letter-spacing: -.02em; line-height: 1.1; }
.stat .l { color: var(--muted); font-size: 13px; }
.ic.indigo { background: var(--primary-soft); color: var(--primary); }
.ic.green { background: var(--green-soft); color: var(--green); }
.ic.blue { background: var(--blue-soft); color: var(--blue); }
.ic.amber { background: var(--amber-soft); color: var(--amber); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 38px; padding: 0 16px;
  border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font: 500 14px/1 inherit; font-family: inherit; cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--bg); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: #4338ca; }
.btn.danger { color: var(--red); }
.btn.danger:hover { background: var(--red-soft); border-color: #fecaca; }
.btn.sm { height: 32px; padding: 0 12px; font-size: 13px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--bg); color: var(--muted); white-space: nowrap; }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.green { background: var(--green-soft); color: var(--green); }
.badge.red { background: var(--red-soft); color: var(--red); }
.badge.amber { background: var(--amber-soft); color: var(--amber); }
.badge.blue { background: var(--blue-soft); color: var(--blue); }
.badge.indigo { background: var(--primary-soft); color: var(--primary); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; padding: 12px 20px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 14px 20px; border-bottom: 1px solid var(--border); vertical-align: middle; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td .sub { color: var(--muted); font-size: 12px; }
.dir { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; }
.dir.in { color: var(--blue); }
.dir.out { color: var(--primary); }
audio { height: 34px; width: 240px; }
.empty { text-align: center; color: var(--muted); padding: 40px 20px; }

label.f { display: block; font-weight: 600; font-size: 13px; margin-bottom: 6px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; height: 40px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface);
  font: inherit; color: var(--text); outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea { height: auto; padding: 10px 12px; resize: vertical; min-height: 96px; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); }
.field { margin-bottom: 18px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.row3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.switch { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 0; border-top: 1px solid var(--border); }
.switch:first-of-type { border-top: 0; }
.switch b { display: block; font-size: 14px; }
.switch span { color: var(--muted); font-size: 13px; }
.toggle { position: relative; width: 44px; height: 24px; flex: none; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle i { position: absolute; inset: 0; background: #cbd5e1; border-radius: 999px; cursor: pointer; transition: .2s; }
.toggle i::after { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .2s; box-shadow: 0 1px 2px rgba(0,0,0,.2); }
.toggle input:checked + i { background: var(--primary); }
.toggle input:checked + i::after { transform: translateX(20px); }

.seg { display: inline-flex; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.seg button { border: 0; background: none; padding: 6px 14px; border-radius: 8px; font: 500 13px inherit; font-family: inherit; color: var(--muted); cursor: pointer; }
.seg button.on { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

.conn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 16px; }
.conn { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.conn .top { display: flex; align-items: center; gap: 12px; }
.conn .av { width: 44px; height: 44px; border-radius: 12px; background: var(--green-soft); color: var(--green); display: grid; place-items: center; }
.conn .name { font-weight: 600; }
.conn .phone { color: var(--muted); font-size: 13px; }
.conn .actions { display: flex; gap: 8px; flex-wrap: wrap; }
.qr { display: grid; place-items: center; padding: 12px; background: var(--bg); border-radius: 12px; text-align: center; color: var(--muted); font-size: 13px; }
.qr img { width: 220px; height: 220px; border-radius: 8px; background: #fff; padding: 6px; }

.status-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-top: 1px solid var(--border); gap: 12px; }
.status-row:first-child { border-top: 0; padding-top: 0; }
.status-row .k { display: flex; align-items: center; gap: 10px; font-weight: 500; }
.progress { height: 6px; background: var(--bg); border-radius: 999px; overflow: hidden; width: 140px; }
.progress span { display: block; height: 100%; background: var(--primary); }

.toast { position: fixed; right: 20px; bottom: 20px; background: var(--text); color: #fff; padding: 12px 16px; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.2); z-index: 100; max-width: 380px; transform: translateY(20px); opacity: 0; transition: .2s; pointer-events: none; }
.toast.show { transform: none; opacity: 1; }
.toast.err { background: var(--red); }

.modal-bg { position: fixed; inset: 0; background: rgba(15, 23, 42, .4); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal { width: 100%; max-width: 440px; }
.modal pre { white-space: pre-wrap; font: 13px/1.6 inherit; font-family: inherit; margin: 0; max-height: 60vh; overflow: auto; }

/* ---------- login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; background: radial-gradient(1200px 600px at 10% -10%, #e0e7ff 0, transparent 60%), radial-gradient(900px 500px at 110% 110%, #dcfce7 0, transparent 55%), var(--bg); }
.login { width: 100%; max-width: 400px; padding: 36px 32px; }
.login .brand { padding: 0 0 24px; }
.login h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -.02em; }
.login p.sub { margin: 0 0 24px; color: var(--muted); }
.login .btn { width: 100%; height: 42px; }
.err-msg { color: var(--red); font-size: 13px; min-height: 20px; margin-bottom: 8px; }

/* ---------- responsivo ---------- */
@media (max-width: 1100px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } .two { grid-template-columns: 1fr; } }
@media (max-width: 860px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: none; box-shadow: 0 0 40px rgba(0,0,0,.15); }
  .main { margin-left: 0; padding: 20px 16px 40px; }
  .btn.menu-btn { display: inline-flex; }
  .row, .row3 { grid-template-columns: 1fr; }
}
@media (max-width: 520px) { .stats { grid-template-columns: 1fr; } }