/* ============================================
   PAINEL — Estilos globais
   ============================================ */

:root {
  --verde: #25D366;
  --verde-escuro: #128C7E;
  --verde-claro: #DCF8C6;
  --cinza-bg: #f4f6f8;
  --cinza-card: #ffffff;
  --cinza-borda: #e5e8eb;
  --texto: #1a202c;
  --texto-secundario: #64748b;
  --erro: #e53e3e;
  --sucesso: #16a34a;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
  font-family: var(--font);
  font-size: 15px;
  color: var(--texto);
  background-color: var(--cinza-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--verde-escuro); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: 15px;
}

/* -------- Layout com sidebar -------- */
.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background-color: #111827;
  color: #e2e8f0;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-logo {
  font-size: 18px;
  font-weight: 700;
  padding: 4px 12px 20px;
  border-bottom: 1px solid #1f2937;
  margin-bottom: 12px;
  color: var(--verde);
}

.sidebar a {
  color: #cbd5e1;
  padding: 10px 12px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
}

.sidebar a:hover {
  background-color: #1f2937;
  color: #fff;
  text-decoration: none;
}

.sidebar a.ativo {
  background-color: var(--verde-escuro);
  color: #fff;
}

.sidebar-bottom {
  margin-top: auto;
  border-top: 1px solid #1f2937;
  padding-top: 12px;
}

.main {
  padding: 28px 32px;
  overflow-x: hidden;
}

.main-titulo {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 6px;
}

.main-subtitulo {
  color: var(--texto-secundario);
  margin-bottom: 24px;
  font-size: 14px;
}

/* -------- Cards -------- */
.card {
  background-color: var(--cinza-card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--cinza-borda);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background-color: var(--cinza-card);
  border-radius: var(--radius);
  padding: 18px 20px;
  border: 1px solid var(--cinza-borda);
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--texto-secundario);
  font-weight: 600;
  margin-bottom: 8px;
}

.stat-valor {
  font-size: 28px;
  font-weight: 700;
  color: var(--texto);
}

.stat-valor.verde { color: var(--verde-escuro); }
.stat-valor.vermelho { color: var(--erro); }

/* -------- Tabela -------- */
.tabela {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.tabela th {
  text-align: left;
  padding: 12px;
  background-color: #f8fafc;
  color: var(--texto-secundario);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--cinza-borda);
}

.tabela td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--cinza-borda);
}

.tabela tbody tr:hover {
  background-color: #fafbfc;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-conectado {
  background-color: var(--verde-claro);
  color: var(--verde-escuro);
}

.badge-desconectado {
  background-color: #fee;
  color: var(--erro);
}

.badge-neutro {
  background-color: #f1f5f9;
  color: var(--texto-secundario);
}

/* -------- Botões -------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  min-height: 40px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.15s;
}

.btn-primario {
  background-color: var(--verde);
  color: #fff;
}

.btn-primario:hover {
  background-color: var(--verde-escuro);
}

.btn-secundario {
  background-color: #f1f5f9;
  color: var(--texto);
}

.btn-secundario:hover {
  background-color: #e2e8f0;
}

.btn-perigo {
  background-color: #fee;
  color: var(--erro);
}

.btn-perigo:hover {
  background-color: #fcc;
}

.btn-bloco {
  width: 100%;
}

/* -------- Login -------- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  padding: 20px;
}

.login-card {
  background-color: #fff;
  padding: 36px 32px;
  border-radius: 14px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.25);
  width: 100%;
  max-width: 380px;
}

.login-titulo {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
}

.login-sub {
  text-align: center;
  color: var(--texto-secundario);
  font-size: 14px;
  margin-bottom: 24px;
}

.form-grupo {
  margin-bottom: 16px;
}

.form-grupo label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--texto);
}

.form-grupo input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--cinza-borda);
  border-radius: 8px;
  transition: border-color 0.15s;
}

.form-grupo input:focus {
  outline: none;
  border-color: var(--verde);
}

.form-erro {
  background-color: #fff0f0;
  color: var(--erro);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 14px;
  border: 1px solid #fac;
}

.form-sucesso {
  background-color: #e9fbe5;
  color: var(--sucesso);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 14px;
  border: 1px solid #bfe8b5;
}

/* -------- Spinner -------- */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: girar 0.8s linear infinite;
}

@keyframes girar {
  to { transform: rotate(360deg); }
}

.text-muted {
  color: var(--texto-secundario);
  font-size: 13px;
}

/* -------- Responsivo -------- */
@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    flex-direction: row;
    padding: 12px;
    overflow-x: auto;
  }
  .sidebar-logo { border: none; padding: 4px 12px; white-space: nowrap; }
  .sidebar a { flex-shrink: 0; }
  .sidebar-bottom { margin-top: 0; border: none; padding: 0; }
  .main { padding: 20px 16px; }
}