:root {
  --bg: #0f172a;
  --card: #1e293b;
  --border: #334155;
  --green: #22c55e;
  --green-dark: #16a34a;
  --red: #ef4444;
  --yellow: #f59e0b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --nav-h: 60px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
  min-height: 100vh;
}

/* ── Navbar ───────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 24px;
  gap: 8px; z-index: 100;
}

.navbar-brand {
  font-weight: 700; font-size: 17px; color: var(--green);
  text-decoration: none; margin-right: 16px;
  display: flex; align-items: center; gap: 8px;
}

.nav-link {
  color: var(--muted); text-decoration: none;
  padding: 6px 14px; border-radius: 6px;
  font-size: 14px; transition: all .15s;
}
.nav-link:hover, .nav-link.ativo { color: var(--text); background: var(--border); }

.navbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }

.dot-status {
  width: 9px; height: 9px; border-radius: 50%; display: inline-block;
  background: var(--red);
}
.dot-status.conectado { background: var(--green); }
.dot-status.aguardando { background: var(--yellow); animation: pulse 1.2s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; } 50% { opacity: .3; }
}

.btn-logout {
  background: none; border: 1px solid var(--border);
  color: var(--muted); padding: 5px 12px; border-radius: 6px;
  cursor: pointer; font-size: 13px; transition: all .15s;
}
.btn-logout:hover { border-color: var(--red); color: var(--red); }

/* ── Layout principal ─────────────────────────────────────────── */
.main {
  padding: calc(var(--nav-h) + 32px) 24px 40px;
  max-width: 1100px; margin: 0 auto;
}

h1 { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
h2 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }

/* ── Cards ────────────────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 32px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 24px;
}

.card-label { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.card-value { font-size: 32px; font-weight: 700; }
.card-value.verde { color: var(--green); }
.card-value.azul { color: #60a5fa; }

/* ── Gráfico ──────────────────────────────────────────────────── */
.chart-wrap {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 24px; margin-bottom: 32px;
}

/* ── Tabela ───────────────────────────────────────────────────── */
.tabela-wrap {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
}

table { width: 100%; border-collapse: collapse; }
thead th {
  padding: 12px 16px; text-align: left; font-size: 12px;
  color: var(--muted); text-transform: uppercase; letter-spacing: .05em;
  border-bottom: 1px solid var(--border);
}
tbody td { padding: 12px 16px; font-size: 14px; border-bottom: 1px solid #1e293b; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: #263344; }

.badge {
  display: inline-block; padding: 2px 10px; border-radius: 20px;
  font-size: 12px; font-weight: 600;
}
.badge-enviada { background: #1d4ed8; color: #bfdbfe; }
.badge-recebida { background: #166534; color: #bbf7d0; }

/* ── Página de Conexão ────────────────────────────────────────── */
.conexao-wrap {
  display: flex; flex-direction: column; align-items: center;
  gap: 24px; padding-top: 16px;
}

.status-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px 48px;
  text-align: center; min-width: 340px;
}

.status-icon { font-size: 48px; margin-bottom: 16px; }
.status-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.status-desc { color: var(--muted); font-size: 14px; }
.status-numero { font-size: 22px; font-weight: 700; color: var(--green); margin-top: 12px; }

.qr-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px; text-align: center;
}
.qr-card img { border-radius: 8px; }
.qr-instrucao {
  margin-top: 16px; color: var(--muted); font-size: 14px; line-height: 1.6;
}

.btn-primary {
  background: var(--green); color: #fff; border: none;
  padding: 10px 24px; border-radius: 8px; cursor: pointer;
  font-size: 15px; font-weight: 600; margin-top: 16px; transition: all .15s;
}
.btn-primary:hover { background: var(--green-dark); }

.btn-danger {
  background: none; border: 1px solid var(--red);
  color: var(--red); padding: 10px 24px; border-radius: 8px;
  cursor: pointer; font-size: 15px; font-weight: 600;
  margin-top: 16px; transition: all .15s;
}
.btn-danger:hover { background: var(--red); color: #fff; }

/* ── Login ────────────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh; display: flex;
  align-items: center; justify-content: center; padding: 24px;
}

.login-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 40px; width: 100%; max-width: 380px;
}

.login-logo {
  text-align: center; margin-bottom: 32px;
}
.login-logo .icon { font-size: 48px; }
.login-logo h1 { font-size: 22px; font-weight: 700; margin-top: 12px; }
.login-logo p { color: var(--muted); font-size: 14px; margin-top: 4px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%; background: var(--bg);
  border: 1px solid var(--border); color: var(--text);
  padding: 10px 14px; border-radius: 8px; font-size: 15px; outline: none;
  transition: border-color .15s;
}
.field input:focus { border-color: var(--green); }

.btn-submit {
  width: 100%; background: var(--green); color: #fff;
  border: none; padding: 12px; border-radius: 8px;
  font-size: 16px; font-weight: 700; cursor: pointer;
  margin-top: 8px; transition: background .15s;
}
.btn-submit:hover { background: var(--green-dark); }

.erro-msg {
  background: #450a0a; border: 1px solid var(--red);
  color: #fca5a5; border-radius: 8px; padding: 10px 14px;
  font-size: 14px; margin-bottom: 16px; text-align: center;
}

/* ── Responsivo ───────────────────────────────────────────────── */
@media (max-width: 640px) {
  .main { padding-left: 16px; padding-right: 16px; }
  .status-card { padding: 24px; min-width: unset; width: 100%; }
  .nav-link span { display: none; }
}