:root {
  /* --- Color --- */
  --bg: #0B0E11;
  --surface: #12161B;
  --surface-raised: #171C22;
  --border: #1E252B;
  --border-light: #2A3239;
  --text: #E6EDF3;
  --text-muted: #8B98A5;
  --text-dim: #5B6672;

  --accent: #2DD4BF;        /* fibra / acciones primarias */
  --accent-dim: #1B4B45;
  --success: #34D399;       /* online */
  --warning: #FBBF24;       /* bloqueado / degradado */
  --critical: #F87171;      /* offline / error */

  /* --- Type --- */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 8px;
  --radius-sm: 5px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

h1, h2, h3 {
  font-family: var(--font-display);
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; }

input[type="text"],
input[type="password"],
input[type="number"] {
  background: var(--bg);
  border: 1px solid var(--border-light);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  font-family: var(--font-body);
  font-size: 13.5px;
  width: 100%;
  outline: none;
  transition: border-color .15s ease;
}
input:focus {
  border-color: var(--accent);
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
.checkbox-label input { width: auto; }

/* --- Buttons --- */
.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 9px 16px;
  cursor: pointer;
  transition: all .15s ease;
}
.btn-block { width: 100%; }
.btn-primary {
  background: var(--accent);
  color: #06201C;
}
.btn-primary:hover { background: #4EE3D0; }
.btn-secondary {
  background: var(--surface-raised);
  color: var(--text);
  border-color: var(--border-light);
}
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border-light);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }
.btn-warning {
  background: rgba(251, 191, 36, 0.12);
  color: var(--warning);
  border-color: rgba(251, 191, 36, 0.3);
}
.btn-warning:hover { background: rgba(251, 191, 36, 0.2); }
.btn-danger {
  background: rgba(248, 113, 113, 0.12);
  color: var(--critical);
  border-color: rgba(248, 113, 113, 0.3);
}
.btn-danger:hover { background: rgba(248, 113, 113, 0.2); }

/* --- Brand --- */
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #0E7C6F);
  position: relative;
  flex-shrink: 0;
}
.brand-mark::after {
  content: '';
  position: absolute;
  inset: 9px;
  border-radius: 3px;
  background: var(--bg);
  box-shadow: 0 0 0 2px var(--accent) inset;
}
.brand h1 { font-size: 17px; }
.brand-sub { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); margin-top: 2px; }

/* --- Login --- */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 20% 20%, rgba(45,212,191,0.06), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(45,212,191,0.04), transparent 40%),
    var(--bg);
}
.login-card {
  width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.login-card .brand { margin-bottom: 28px; }
.form-error {
  color: var(--critical);
  font-size: 12.5px;
  min-height: 16px;
  margin: 4px 0 12px;
}

/* --- App layout --- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}
.brand-sidebar { margin-bottom: 32px; padding: 0 8px; }

.sidebar-scroll { flex: 1; overflow-y: auto; }
.sidebar-section-label {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-dim); padding: 0 8px; margin-bottom: 8px; font-weight: 600;
}

/* --- OLT tree (sidebar) --- */
.olt-tree { display: flex; flex-direction: column; gap: 2px; }
.olt-node-row {
  display: flex; align-items: center; gap: 4px;
  border-radius: var(--radius-sm);
}
.olt-node-row:hover { background: var(--surface-raised); }
.olt-node-selected { background: var(--accent-dim); }
.olt-node-toggle {
  background: transparent; border: none; color: var(--text-dim);
  font-size: 10px; width: 20px; padding: 8px 0; cursor: pointer; text-align: center;
}
.olt-node-name {
  flex: 1; text-align: left; background: transparent; border: none;
  color: var(--text); font-family: var(--font-body); font-weight: 600;
  font-size: 13px; padding: 8px 0; cursor: pointer;
}
.olt-node-selected .olt-node-name { color: var(--accent); }
.olt-node-edit {
  background: transparent; border: none; color: var(--text-dim);
  font-size: 12px; padding: 6px 8px; cursor: pointer; opacity: 0;
  transition: opacity .1s ease;
}
.olt-node-row:hover .olt-node-edit { opacity: 1; }
.olt-node-edit:hover { color: var(--text); }
.olt-node-menu {
  display: flex; flex-direction: column; gap: 1px;
  padding: 2px 0 4px 24px;
}
.olt-menu-item {
  text-align: left; background: transparent; border: none;
  color: var(--text-muted); font-family: var(--font-body); font-size: 12.5px;
  padding: 7px 10px; border-radius: var(--radius-sm); cursor: pointer;
}
.olt-menu-item:hover { background: var(--surface-raised); color: var(--text); }
.olt-menu-item.active { color: var(--accent); font-weight: 600; }

/* --- OLT banner (main content header) --- */
.olt-banner {
  display: flex; align-items: center; gap: 14px;
  padding-bottom: 16px; margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.olt-banner-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 0 3px rgba(52,211,153,0.2); flex-shrink: 0;
}
#oltBannerName { font-size: 13px; color: var(--text-muted); }
.olt-banner-nav { display: flex; gap: 4px; margin-left: auto; }
.olt-banner-nav .nav-item {
  background: transparent; border: none; color: var(--text-muted);
  font-family: var(--font-body); font-weight: 600; font-size: 13px;
  padding: 7px 14px; border-radius: 100px; cursor: pointer;
}
.olt-banner-nav .nav-item:hover { background: var(--surface-raised); color: var(--text); }
.olt-banner-nav .nav-item.active { background: var(--accent-dim); color: var(--accent); }


.sidebar-footer { border-top: 1px solid var(--border); padding-top: 16px; }
.user-chip { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; padding: 0 4px; }
.user-avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent-dim); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  flex-shrink: 0;
}
.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--text-dim); text-transform: capitalize; }

.main { flex: 1; padding: 32px 40px; overflow-y: auto; }
.view-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 24px;
}
.view-sub { color: var(--text-muted); font-size: 13px; margin-top: 6px; }

/* --- Table --- */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.onu-table { width: 100%; border-collapse: collapse; }
.onu-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.onu-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  vertical-align: middle;
}
.onu-table tr:last-child td { border-bottom: none; }
.onu-table tr:hover { background: rgba(255,255,255,0.015); }
.mono { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-muted); }

.search-bar { margin-bottom: 14px; }
.search-bar input {
  max-width: 420px;
}

.empty-state { padding: 48px; text-align: center; color: var(--text-muted); }
.empty-state-sub { font-size: 12.5px; color: var(--text-dim); margin-top: 6px; }

/* --- Signal bars (elemento de firma) --- */
.signal-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 16px;
}
.signal-bars i {
  display: block;
  width: 3px;
  background: var(--border-light);
  border-radius: 1px;
}
.signal-bars i:nth-child(1) { height: 5px; }
.signal-bars i:nth-child(2) { height: 8px; }
.signal-bars i:nth-child(3) { height: 11px; }
.signal-bars i:nth-child(4) { height: 16px; }
.signal-bars.level-4 i { background: var(--success); }
.signal-bars.level-3 i:nth-child(-n+3) { background: var(--success); }
.signal-bars.level-2 i:nth-child(-n+2) { background: var(--warning); }
.signal-bars.level-1 i:nth-child(1) { background: var(--critical); }
.signal-bars.level-0 i { background: var(--border-light); }

/* --- Status pill --- */
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 100px;
}
.status-pill::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
}
.status-online { background: rgba(52,211,153,0.1); color: var(--success); }
.status-online::before { background: var(--success); box-shadow: 0 0 0 3px rgba(52,211,153,0.2); }
.status-blocked { background: rgba(251,191,36,0.1); color: var(--warning); }
.status-blocked::before { background: var(--warning); box-shadow: 0 0 0 3px rgba(251,191,36,0.2); }
.status-offline { background: rgba(248,113,113,0.1); color: var(--critical); }
.status-offline::before { background: var(--critical); box-shadow: 0 0 0 3px rgba(248,113,113,0.2); }
.status-unknown { background: rgba(139,152,165,0.1); color: var(--text-muted); }
.status-unknown::before { background: var(--text-dim); }

.row-actions { display: flex; gap: 6px; justify-content: flex-end; }
.row-actions .btn { padding: 6px 10px; font-size: 12px; }

/* --- Inline form (autofind) --- */
.inline-form {
  display: flex; align-items: flex-end; gap: 16px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 20px;
}
.inline-form label { margin-bottom: 0; width: 100px; }

.raw-output {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow-y: auto;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(5,7,9,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  width: 480px; max-width: 100%;
  max-height: 88vh;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.modal-wide { width: 620px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-close {
  background: transparent; border: none; color: var(--text-muted);
  font-size: 20px; cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--text); }
.pppoe-section {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 14px;
}

.modal-form, .modal-body { padding: 20px 22px; overflow-y: auto; }
.modal-footer {
  padding: 16px 22px; border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 6px; }
.modal-actions #btnDeleteOlt { margin-right: auto; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.danger-zone { display: flex; gap: 10px; justify-content: flex-end; }

.detail-tabs { display: flex; gap: 4px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.tab-btn {
  background: transparent; border: none; color: var(--text-muted);
  font-family: var(--font-body); font-weight: 600; font-size: 13px;
  padding: 8px 4px; margin-right: 20px; cursor: pointer;
  border-bottom: 2px solid transparent;
}
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.fb-tab-btn {
  background: transparent; border: none; color: var(--text-muted);
  font-family: var(--font-body); font-weight: 600; font-size: 13px;
  padding: 8px 4px; margin-right: 20px; cursor: pointer;
  border-bottom: 2px solid transparent;
}
.fb-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel .btn { margin-bottom: 12px; }

/* --- Toast --- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--surface-raised); border: 1px solid var(--border-light);
  color: var(--text); padding: 12px 20px; border-radius: var(--radius-sm);
  font-size: 13px; z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.toast.toast-error { border-color: rgba(248,113,113,0.4); color: var(--critical); }
.toast.toast-success { border-color: rgba(52,211,153,0.4); color: var(--success); }

/* --- Traffic chart --- */
.traffic-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.traffic-legend { display: flex; gap: 16px; font-size: 12.5px; color: var(--text-muted); }
.legend-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  margin-right: 6px;
}
.legend-down { background: var(--accent); }
.legend-up { background: var(--warning); }
.traffic-readout { display: flex; gap: 14px; }
.traffic-value {
  font-family: var(--font-mono); font-size: 14px; font-weight: 600;
  color: var(--accent);
}
.traffic-value-up { color: var(--warning); }
#trafficCanvas {
  width: 100%; height: 200px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* --- WAN connection cards --- */
.wan-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 10px;
}
.wan-card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px;
}
.conn-badge {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 100px;
  margin-bottom: 10px;
}
.conn-up { background: rgba(52,211,153,0.1); color: var(--success); }
.conn-down { background: rgba(248,113,113,0.1); color: var(--critical); }
.wan-card-grid {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 6px 12px;
  font-size: 12.5px;
}

/* --- Stats bar (dashboard semaforo) --- */
.stats-bar { display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.stat-card {
  flex: 1; min-width: 110px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat-card .stat-value { font-family: var(--font-mono); font-size: 22px; font-weight: 600; }
.stat-card .stat-label { font-size: 11.5px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em; margin-top: 4px; }
.stat-card.stat-total .stat-value { color: var(--text); }
.stat-card.stat-online .stat-value { color: var(--success); }
.stat-card.stat-offline .stat-value { color: var(--critical); }
.stat-card.stat-blocked .stat-value { color: var(--warning); }
.stat-card.stat-suspended .stat-value { color: var(--warning); }

/* --- Semaforo de primer bloqueo en la lista --- */
.suspended-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 600;
  padding: 3px 8px; border-radius: 100px;
  background: rgba(251,191,36,0.12); color: var(--warning);
  margin-left: 6px;
}

/* --- Tree (topologia) --- */
.tree { display: flex; flex-direction: column; gap: 8px; }
.tree-slot {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.tree-slot-header, .tree-port-header {
  display: flex; align-items: center; gap: 12px;
  width: 100%; text-align: left;
  background: transparent; border: none;
  color: var(--text); cursor: pointer;
  padding: 14px 16px; font-size: 13.5px; font-family: var(--font-body);
}
.tree-slot-header:hover, .tree-port-header:hover { background: rgba(255,255,255,0.02); }
.tree-toggle { color: var(--text-dim); font-size: 11px; width: 10px; }
.tree-board-name { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); }
.tree-ports { border-top: 1px solid var(--border); padding: 6px 12px 6px 32px; }
.tree-port { border-bottom: 1px solid var(--border); }
.tree-port:last-child { border-bottom: none; }
.tree-port-header { padding: 10px 8px; font-size: 13px; }
.tree-onus { padding: 4px 8px 10px 24px; display: flex; flex-direction: column; gap: 6px; }
.tree-onu-row {
  display: grid;
  grid-template-columns: 70px 150px 1fr 100px auto;
  align-items: center; gap: 12px;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
}
.tree-onu-row .btn { padding: 5px 10px; font-size: 11.5px; }
.tree-port-empty { color: var(--text-dim); font-size: 12.5px; padding: 6px 10px; }

@media (max-width: 720px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; padding: 12px 16px; }
  .nav { flex-direction: row; }
  .sidebar-footer { display: none; }
  .main { padding: 20px; }
  .form-grid { grid-template-columns: 1fr; }
}