/* ========================================================================
   Design Tokens — power operations console
   ======================================================================== */
:root {
  /* Surfaces */
  --bg:         #0d0f12;
  --surface:    #15191e;
  --surface-2:  #1d2329;
  --surface-3:  #273039;
  --border:     #303942;
  --border-hi:  #50606e;

  /* Text */
  --text:       #f2f4ef;
  --text-muted: #b6c0b9;
  --text-dim:   #7f8b88;

  /* Brand / accent */
  --accent:         #f4b860;
  --accent-hover:   #d9922e;
  --accent-dim:     #49331a;

  /* Semantic */
  --success:    #38d07a;
  --success-bg: #102f21;
  --warning:    #f4b860;
  --warning-bg: #3d2a12;
  --danger:     #ff5a5f;
  --danger-bg:  #3e181b;
  --info:       #4cc9c0;
  --info-bg:    #102f31;

  /* Elevation */
  --shadow-sm:  0 1px 2px rgba(0,0,0,.3);
  --shadow-md:  0 2px 8px rgba(0,0,0,.35);
  --shadow-lg:  0 8px 24px rgba(0,0,0,.45);

  /* Radii & spacing */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
}

/* ========================================================================
   Reset & base
   ======================================================================== */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  background:
    linear-gradient(90deg, rgba(244, 184, 96, .045) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(0deg, rgba(76, 201, 192, .035) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(180deg, #101317 0%, var(--bg) 42%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 { margin: 0 0 0.5rem 0; font-weight: 600; color: var(--text); }
h1 { font-size: 1.4rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }

hr { border: 0; border-top: 1px solid var(--border); margin: 1rem 0; }

code, pre { font-family: var(--font-mono); }

/* ========================================================================
   Header & nav
   ======================================================================== */
.site-header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
  background: rgba(21, 25, 30, .94);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.site-header .brand a {
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.site-header .brand a:hover { text-decoration: none; color: var(--text); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 26px;
  border: 1px solid rgba(244, 184, 96, .65);
  border-radius: var(--radius-sm);
  color: var(--accent);
  background: rgba(244, 184, 96, .08);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}
.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand-title { font-weight: 700; font-size: 15px; }
.brand-subtitle {
  color: var(--text-dim);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .8px;
  margin-top: 4px;
}

.main-nav {
  display: flex;
  gap: 4px;
  flex: 1;
  flex-wrap: wrap;
}
.main-nav a {
  color: var(--text-muted);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.main-nav a:hover {
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
}
.main-nav a.active {
  background: rgba(244, 184, 96, .12);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(244, 184, 96, .25);
}

.user-menu { display: flex; align-items: center; gap: 10px; }
.user-menu .username {
  font-size: 13px;
  color: var(--text-muted);
  padding: 4px 8px;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
}
.btn-logout {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: background .15s, color .15s, border-color .15s;
}
.btn-logout:hover {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger);
}

.site-main { padding: 22px 24px 32px; max-width: 1600px; margin: 0 auto; }

/* ========================================================================
   Page scaffolding
   ======================================================================== */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 16px;
  flex-wrap: wrap;
}
.page-header h1 { margin: 0; font-size: 22px; }

.dashboard-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}
.dashboard-header h1 {
  margin: 0;
  font-size: 26px;
  line-height: 1.15;
}
.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .8px;
  text-transform: uppercase;
}
.dashboard-clock {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(21, 25, 30, .86);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  box-shadow: 0 0 0 0 rgba(76, 201, 192, .35);
}
.dashboard-clock.live .pulse-dot {
  background: var(--success);
  animation: statusPulse 1.8s ease-out infinite;
}
@keyframes statusPulse {
  0% { box-shadow: 0 0 0 0 rgba(56, 208, 122, .32); }
  70% { box-shadow: 0 0 0 8px rgba(56, 208, 122, 0); }
  100% { box-shadow: 0 0 0 0 rgba(56, 208, 122, 0); }
}

.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters select, .filters input {
  padding: 7px 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.filters select:focus, .filters input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.15);
}

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

/* ========================================================================
   Tables
   ======================================================================== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.data-table th, .data-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text);
}
.data-table th {
  background: var(--surface-2);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: .5px;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface-2); }

/* Severity pills */
.sev {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.sev.CRITICAL { background: var(--danger-bg);  color: var(--danger);  border: 1px solid var(--danger); }
.sev.WARNING  { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--warning); }
.sev.INFO     { background: var(--info-bg);    color: var(--info);    border: 1px solid var(--info); }

/* ========================================================================
   Settings
   ======================================================================== */
.settings-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  max-width: 860px;
}
.settings-section h2 {
  margin-top: 0;
  font-size: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}

.settings-form { display: flex; flex-direction: column; gap: 18px; }

/* ---- Toggle grid (tabular on/off switches) ---- */
.toggle-grid {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface-2);
}
.toggle-grid.compact .toggle-row { padding: 10px 14px; }
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  transition: background .15s;
}
.toggle-row:last-child { border-bottom: none; }
.toggle-row:hover { background: var(--surface-3); }
.toggle-label { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.toggle-title { font-size: 14px; color: var(--text); font-weight: 500; }
.toggle-help  { font-size: 12px; color: var(--text-dim); }

/* iOS-style switch */
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.switch .slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--surface-3);
  border: 1px solid var(--border-hi);
  border-radius: 22px;
  transition: background .2s, border-color .2s;
}
.switch .slider::before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  top: 2px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform .2s, background .2s;
}
.switch input:checked + .slider {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.switch input:checked + .slider::before {
  transform: translateX(18px);
  background: #fff;
}
.switch input:focus-visible + .slider {
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.25);
}

/* ---- Labeled input rows ---- */
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
}
.field-row { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field-row.wide { grid-column: 1 / -1; }
.field-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  font-weight: 600;
}
.field-input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.field-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.15);
}
.field-input::placeholder { color: var(--text-dim); }

/* Inline (non-grid) single field row */
.settings-form > .field-row { max-width: 280px; }

.form-bar {
  display: flex;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

@media (max-width: 640px) {
  .field-grid { grid-template-columns: 1fr; }
  .toggle-row { padding: 12px 14px; }
}

/* ========================================================================
   Buttons (global)
   ======================================================================== */
.btn-primary {
  background: var(--accent-hover);
  color: #fff;
  border: 0;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background .15s;
}
.btn-primary:hover { background: var(--accent); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-block { width: 100%; }

/* ========================================================================
   Fleet overview
   ======================================================================== */
.fleet-overview { margin-bottom: 20px; }
.fleet-card {
  background: linear-gradient(180deg, rgba(29, 35, 41, .94), rgba(21, 25, 30, .94));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0;
  box-shadow: var(--shadow-sm);
}
.fleet-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding: 2px 18px;
  border-left: 1px solid rgba(80, 96, 110, .42);
}
.fleet-stat:first-child { border-left: 0; padding-left: 0; }
.fleet-stat-label {
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  font-weight: 600;
}
.fleet-stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}
.fleet-stat-value.online  { color: var(--success); }
.fleet-stat-value.onbatt  { color: var(--warning); }
.fleet-stat-value.offline { color: var(--danger); }

/* ========================================================================
   State indicators (shared)
   ======================================================================== */
.state-dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--text-dim);
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 0 2px rgba(255,255,255,.05);
}
.state-dot.online  { background: var(--success); box-shadow: 0 0 6px rgba(16,185,129,.5); }
.state-dot.onbatt  { background: var(--warning); box-shadow: 0 0 6px rgba(245,158,11,.5); }
.state-dot.offline { background: var(--danger);  box-shadow: 0 0 6px rgba(239,68,68,.5); }

/* ========================================================================
   Empty state
   ======================================================================== */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  width: 100%;
}
.empty-state h3 { color: var(--text); margin-bottom: 0.5rem; }
.empty-state a { color: var(--accent); }

/* ========================================================================
   Scrollbars
   ======================================================================== */
* { scrollbar-width: thin; scrollbar-color: var(--border-hi) var(--bg); }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--bg); }
*::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 5px; border: 2px solid var(--bg); }
*::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ========================================================================
   Responsive
   ======================================================================== */
@media (max-width: 768px) {
  .site-header { flex-direction: column; align-items: flex-start; gap: 12px; padding: 12px 16px; }
  .main-nav { width: 100%; }
  .site-main { padding: 16px; }
  .dashboard-header { align-items: flex-start; flex-direction: column; }
  .dashboard-header h1 { font-size: 22px; }
  .fleet-card { grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); padding: 14px 16px; }
  .fleet-stat { border-left: 0; padding: 8px 0; }
  .fleet-stat-value { font-size: 20px; }
}