/* =======================================================
   Monitor PON · i-TIC · estilos
   Mobile-first, dark theme, dashboard layout
   ======================================================= */

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

:root {
  --bg: #0b1220;
  --bg-2: #111a2e;
  --bg-3: #16213a;
  --panel: #111a2e;
  --panel-2: #182441;
  --border: #223055;
  --text: #e6ecff;
  --text-dim: #9aa7c7;
  --text-mute: #6b7896;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --ok: #22c55e;
  --warn: #eab308;
  --err: #ef4444;
  --critical: #f97316;
  --shadow: 0 6px 18px rgba(0,0,0,0.35);
  --radius: 10px;
  --radius-sm: 6px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  min-height: 100vh;
}

.screen { min-height: 100vh; }
[hidden] { display: none !important; }

/* ============ LOGIN ============ */
.screen-login {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(ellipse at top, #1a2547 0%, #0b1220 70%);
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
  box-shadow: var(--shadow);
}
.brand {
  text-align: center;
  margin-bottom: 24px;
}
.brand-mark {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--primary);
}
.brand-sub {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-top: 4px;
}
.login-title {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 6px;
  text-align: center;
}
.login-help {
  text-align: center;
  color: var(--text-dim);
  margin: 0 0 22px;
  font-size: 13px;
}
.login-field {
  margin-bottom: 16px;
}
.login-field label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.login-field input {
  width: 100%;
  padding: 11px 12px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  outline: none;
  transition: border-color 0.15s;
}
.login-field input:focus {
  border-color: var(--primary);
}
.login-error {
  margin-top: 12px;
  padding: 10px 12px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fecaca;
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.login-footer {
  margin-top: 22px;
  text-align: center;
  color: var(--text-mute);
  font-size: 11px;
}

/* ============ BOTONES ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-family: inherit;
  color: var(--text);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary {
  background: var(--panel-2);
  border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-3); }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-dim);
}
.btn-ghost:hover { color: var(--text); background: var(--panel-2); }
.btn-block { width: 100%; padding: 11px 16px; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}
.icon-btn:hover { color: var(--text); background: var(--panel-2); }

/* ============ TOPBAR ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  height: 54px;
}
.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-brand { display: flex; flex-direction: column; line-height: 1.1; }
.topbar-title { font-weight: 700; letter-spacing: -0.01em; }
.topbar-sub { color: var(--primary); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; }
#menuToggle { display: none; }

.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  font-size: 12px;
  color: var(--text-dim);
}
.switch input { display: none; }
.switch-slider {
  width: 34px;
  height: 18px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  position: relative;
  transition: background 0.2s;
}
.switch-slider::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 1px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: transform 0.2s, background 0.2s;
}
.switch input:checked + .switch-slider { background: var(--primary); border-color: var(--primary); }
.switch input:checked + .switch-slider::after { transform: translateX(16px); background: #fff; }

/* ============ LAYOUT ============ */
.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 54px);
}

/* ============ SIDEBAR ============ */
.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 16px 12px;
  overflow-y: auto;
  max-height: calc(100vh - 54px);
  position: sticky;
  top: 54px;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  font-weight: 600;
}
.olt-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.olt-placeholder {
  padding: 10px;
  color: var(--text-mute);
  font-size: 13px;
  text-align: center;
}
.olt-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.12s, border-color 0.12s;
}
.olt-item:hover { background: var(--panel-2); }
.olt-item.active {
  background: var(--panel-2);
  border-color: var(--primary);
}
.olt-item-name {
  font-weight: 600;
  font-size: 13px;
}
.olt-item-meta {
  font-size: 11px;
  color: var(--text-mute);
  margin-top: 2px;
  display: flex;
  gap: 8px;
}
.olt-item.unreachable .olt-item-name::after {
  content: " ⚠";
  color: var(--err);
}

/* ============ MAIN ============ */
.main {
  padding: 20px;
  overflow-x: hidden;
  max-width: 100%;
}

/* ============ OLT SUMMARY ============ */
.olt-summary {
  margin-bottom: 22px;
}
.summary-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.summary-head h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.stat-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.stat-value {
  font-size: 22px;
  font-weight: 700;
  margin-top: 4px;
}
.stat-online .stat-value { color: var(--ok); }
.stat-offline .stat-value { color: var(--err); }
.stat-warn .stat-value { color: var(--critical); }

/* ============ BADGES ============ */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-ok { background: rgba(34, 197, 94, 0.15); color: var(--ok); border: 1px solid rgba(34,197,94,0.35); }
.badge-err { background: rgba(239, 68, 68, 0.15); color: var(--err); border: 1px solid rgba(239,68,68,0.35); }
.badge-warn { background: rgba(234, 179, 8, 0.15); color: var(--warn); border: 1px solid rgba(234,179,8,0.35); }
.badge-critical { background: rgba(249, 115, 22, 0.15); color: var(--critical); border: 1px solid rgba(249,115,22,0.35); }
.badge-neutral { background: var(--bg-3); color: var(--text-dim); border: 1px solid var(--border); }

/* ============ PON GRID ============ */
.pon-grid { margin-bottom: 22px; }
.section-title {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  font-weight: 600;
}
.section-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.section-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.pon-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}
.pon-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}
.pon-card:hover { border-color: var(--primary); }
.pon-card.active {
  border-color: var(--primary);
  background: var(--panel-2);
}
.pon-card-title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
}
.pon-card-stats {
  display: flex;
  gap: 10px;
  font-size: 12px;
  color: var(--text-dim);
}
.pon-card-stats .ok { color: var(--ok); }
.pon-card-stats .err { color: var(--err); }

/* ============ INPUT ============ */
.input {
  padding: 8px 11px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  outline: none;
  min-width: 220px;
  font-family: inherit;
}
.input:focus { border-color: var(--primary); }

/* ============ ONT TABLE ============ */
.ont-section { margin-bottom: 30px; }
.table-wrap {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.ont-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.ont-table thead {
  background: var(--panel-2);
  position: sticky;
  top: 0;
}
.ont-table th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 11px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.ont-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.ont-table tbody tr:hover { background: var(--panel-2); }
.ont-table tbody tr.row-empty td,
.ont-table tbody tr.row-loading td {
  text-align: center;
  color: var(--text-mute);
  padding: 26px;
  font-style: italic;
}
.ont-table .mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}
.rx-ok { color: var(--ok); }
.rx-warn { color: var(--warn); }
.rx-critical { color: var(--critical); }
.rx-err { color: var(--err); }

.temp-warn { color: var(--warn); }
.temp-critical { color: var(--critical); }
.volt-err { color: var(--err); }

/* ============ WELCOME ============ */
.welcome {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}
.welcome-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 36px;
  text-align: center;
  max-width: 420px;
}
.welcome-card h2 { margin: 0 0 8px; font-size: 20px; }
.welcome-card p { margin: 0; color: var(--text-dim); }

/* ============ TOAST ============ */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 18px;
  font-size: 13px;
  box-shadow: var(--shadow);
  z-index: 100;
}
.toast.toast-err { border-color: rgba(239,68,68,0.45); color: #fecaca; }
.toast.toast-ok { border-color: rgba(34,197,94,0.45); color: #bbf7d0; }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  #menuToggle { display: inline-flex; }
  .sidebar {
    position: fixed;
    top: 54px;
    left: 0;
    bottom: 0;
    width: 260px;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 15;
    max-height: none;
  }
  .sidebar.open { transform: translateX(0); }
  .main { padding: 14px; }
  .ont-table th:nth-child(7),
  .ont-table td:nth-child(7),
  .ont-table th:nth-child(8),
  .ont-table td:nth-child(8) { display: none; }
}

@media (max-width: 560px) {
  .summary-head h2 { font-size: 18px; }
  .stat-value { font-size: 18px; }
  .ont-table th:nth-child(2),
  .ont-table td:nth-child(2) { display: none; }
  .ont-table th:nth-child(9),
  .ont-table td:nth-child(9) { display: none; }
  .section-actions { width: 100%; }
  .input { flex: 1; min-width: 0; }
}

/* ===== SPEC-90: Staleness + última caída ===== */
.text-dim { color: var(--text-dim); }

.cause-power    { background: rgba(59,130,246,0.15); color: #93c5fd; border: 1px solid rgba(59,130,246,0.35); }
.cause-los      { background: rgba(239,68,68,0.18);  color: #fecaca; border: 1px solid rgba(239,68,68,0.45);  }
.cause-lofi     { background: rgba(234,179,8,0.15);  color: #fde68a; border: 1px solid rgba(234,179,8,0.35);  }
.cause-sf       { background: rgba(249,115,22,0.15); color: #fed7aa; border: 1px solid rgba(249,115,22,0.35); }
.cause-sd       { background: rgba(234,179,8,0.10);  color: #fef3c7; border: 1px solid rgba(234,179,8,0.25);  }
.cause-admin    { background: rgba(148,163,184,0.18); color: #e2e8f0; border: 1px solid rgba(148,163,184,0.35); }