:root {
  --bg: #0E1416;
  --panel: #151C1F;
  --panel-2: #1B2327;
  --border: #26302F;
  --text: #E6ECEA;
  --muted: #7E8C8A;
  --signal: #3ED9A0;     /* verde sinal de fibra - estados ok/ativo */
  --amber: #F0A857;      /* simulação / atenção */
  --danger: #E9555C;     /* erro / exclusão */
  --font-ui: "Inter", -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.5;
}

.mono { font-family: var(--font-mono); }

/* ---------- shell / sidebar ---------- */

.shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
}

.brand-mark {
  color: var(--signal);
  font-size: 20px;
  line-height: 1;
}

.brand-title {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
}

.brand-sub {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.nav-section {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 16px 0 6px 12px;
  font-weight: 700;
  opacity: 0.7;
}
.nav-link {
  color: var(--muted);
  text-decoration: none;
  padding: 9px 10px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 500;
}

.nav-link:hover { background: var(--panel-2); color: var(--text); }
.nav-link.active { background: var(--panel-2); color: var(--signal); }

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 14px;
  font-size: 12px;
  color: var(--muted);
}

.operator strong { color: var(--text); }

.logout-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--muted);
  text-decoration: none;
}
.logout-link:hover { color: var(--danger); }

.content {
  padding: 36px 44px;
  max-width: 1100px;
}

/* ---------- headers ---------- */

.page-header { margin-bottom: 28px; }

.page-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.eyebrow {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 6px;
}

.back-link { color: var(--muted); text-decoration: none; }
.back-link:hover { color: var(--signal); }

h1 {
  font-size: 26px;
  margin: 0 0 6px 0;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-sub { color: var(--muted); margin: 0; font-size: 13px; }

/* ---------- device grid ---------- */

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.device-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--signal);
  border-radius: 8px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.08s ease, border-color 0.15s ease;
}

.device-card:hover {
  border-color: var(--signal);
  transform: translateY(-1px);
}

.device-card-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.device-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  flex-shrink: 0;
}

.device-name { font-weight: 600; font-size: 14.5px; }

.device-meta {
  color: var(--muted);
  font-size: 12.5px;
  margin-bottom: 8px;
}

.device-profile {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  background: var(--panel-2);
  padding: 3px 8px;
  border-radius: 4px;
}

/* ---------- panels ---------- */

.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.panel-title {
  font-weight: 600;
  font-size: 13.5px;
  margin-bottom: 14px;
}

.panel-info { border-left: 3px solid var(--amber); }

/* ---------- forms ---------- */

.form { display: flex; flex-direction: column; gap: 12px; }

label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12.5px;
  color: var(--muted);
}

input[type="text"],
input[type="password"] {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 11px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
}

input:focus {
  outline: none;
  border-color: var(--signal);
}

.code-editor {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  resize: vertical;
  min-height: 400px;
  white-space: pre;
}

.code-editor:focus {
  outline: none;
  border-color: var(--signal);
}

.checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
}

.checkbox-row input { width: auto; }

.checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 6px;
  max-height: 280px;
  overflow-y: auto;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-2);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  font-family: var(--font-ui);
}

.btn-primary { background: var(--signal); color: #06231A; }
.btn-primary:hover { filter: brightness(1.08); }

.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: rgba(233, 85, 92, 0.1); }

.btn-small { padding: 5px 10px; font-size: 12px; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.btn-small:hover { border-color: var(--signal); }

.btn-block { width: 100%; margin-top: 6px; }

/* ---------- table ---------- */

.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th {
  text-align: left;
  color: var(--muted);
  font-weight: 500;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.table td {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

/* ---------- misc ---------- */

.muted { color: var(--muted); }

.code-block {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--signal);
  overflow-x: auto;
  white-space: pre-wrap;
}

.log-block { color: var(--muted); font-size: 12px; max-height: 70vh; overflow-y: auto; }

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 32px;
  text-align: center;
  color: var(--muted);
}

.empty-state code {
  background: var(--panel-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

/* ---------- flash messages ---------- */

.flash-stack { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }

.flash {
  padding: 11px 14px;
  border-radius: 6px;
  font-size: 13px;
  border: 1px solid var(--border);
}

.flash-success { border-color: var(--signal); color: var(--signal); background: rgba(62, 217, 160, 0.08); }
.flash-error { border-color: var(--danger); color: var(--danger); background: rgba(233, 85, 92, 0.08); }
.flash-info { border-color: var(--amber); color: var(--amber); background: rgba(240, 168, 87, 0.08); }

/* ---------- login ---------- */

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 20% 20%, rgba(62, 217, 160, 0.06), transparent 40%),
    var(--bg);
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 36px 34px;
  width: 100%;
  max-width: 340px;
}

.brand-center { margin-bottom: 24px; }

.login-hint {
  margin-top: 18px;
  font-size: 11.5px;
  color: var(--muted);
  text-align: center;
}

/* ---------- responsive ---------- */

@media (max-width: 800px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; flex-direction: row; align-items: center; }
  .content { padding: 24px 20px; }
}

/* ============================================================
   Overlay de carregamento + modais de resultado (UI pro)
   ============================================================ */

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 13, 0.72);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
  z-index: 1000;
}
.loading-overlay.visible { opacity: 1; pointer-events: all; }

.loading-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 30px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.spinner {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--signal);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* ---- Modal de resultado ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 13, 0.75);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
  z-index: 1100;
  padding: 20px;
}
.modal-overlay.visible { opacity: 1; pointer-events: all; }

.modal-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 30px 26px;
  max-width: 440px;
  width: 100%;
  text-align: center;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
  transform: translateY(8px) scale(0.98);
  transition: transform 0.18s ease;
}
.modal-overlay.visible .modal-card { transform: translateY(0) scale(1); }

.modal-icon {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: 700;
  margin: 0 auto 18px;
}
.modal-success { background: rgba(62, 217, 160, 0.14); color: var(--signal); }
.modal-error   { background: rgba(233, 85, 92, 0.14);  color: var(--danger); }
.modal-info    { background: rgba(126, 140, 138, 0.16); color: var(--muted); }
.modal-warning { background: rgba(240, 168, 87, 0.15);  color: var(--amber); }

.modal-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.modal-body {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
  margin-bottom: 22px;
  white-space: pre-line;
  word-break: break-word;
}
.modal-card .btn { min-width: 120px; }

/* botão com estado de carregando embutido */
.btn[disabled] { opacity: 0.6; cursor: progress; }