:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --surface-2: #fafaf8;
  --border: #e8e7e1;
  --border-strong: #d8d7d1;
  --fg: #131720;
  --fg-muted: #5a6172;
  --fg-subtle: #8b91a1;
  --accent: #10b981;
  --accent-soft: rgba(16,185,129,.12);
  --solar: #10b981;
  --grid-imp: #f87171;
  --grid-exp: #34d399;
  --battery: #a78bfa;
  --home: #60a5fa;
  --warn: #f5b942;
  --alarm: #ef4444;
  --info: #60a5fa;
  --ring: rgba(16,185,129,.35);
  color-scheme: light;
}

.dark {
  --bg: #050810;
  --surface: #0f1524;
  --surface-2: #161d2f;
  --border: #232c42;
  --border-strong: #2f3a55;
  --fg: #eaedf5;
  --fg-muted: #a2acc2;
  --fg-subtle: #768097;
  --accent: #22d39a;
  --accent-soft: rgba(34,211,154,.14);
  --solar: #22d39a;
  --grid-imp: #fb7185;
  --grid-exp: #4ade80;
  --battery: #c084fc;
  --home: #8aa6ff;
  --warn: #fbbf24;
  --alarm: #f87171;
  --info: #8aa6ff;
  --ring: rgba(34,211,154,.4);
  color-scheme: dark;
}

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "cv11", "ss01";
}

/* Surfaces */
.surface { background: var(--surface); border: 1px solid var(--border); }
.surface-2 { background: var(--surface-2); border: 1px solid var(--border); }
.divider { border-color: var(--border); }
.subtle { color: var(--fg-muted); }
.faint { color: var(--fg-subtle); }
.tabular { font-variant-numeric: tabular-nums; }

/* Scrollbars */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 6px; }
*::-webkit-scrollbar-track { background: transparent; }

/* Focus */
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Flow diagram */
.flow-svg .flow-line {
  stroke-width: 2.5;
  fill: none;
  stroke-linecap: round;
}
.flow-svg .flow-line.dashed {
  stroke-dasharray: 4 8;
  animation: dash 1.6s linear infinite;
}
.flow-svg .flow-line.reverse {
  animation-direction: reverse;
}
@keyframes dash {
  to { stroke-dashoffset: -24; }
}

/* Sparkline + tiny chart */
.sparkline { width: 100%; height: 100%; }

/* Highcharts container styling */
.hc-wrap { width: 100%; }
.hc-wrap .highcharts-background { fill: transparent !important; }
.hc-wrap text { font-family: Inter, sans-serif !important; }

/* Toast / pulse */
.pulse-dot {
  position: relative;
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--solar);
  border-radius: 999px;
}
.pulse-dot::after {
  content: '';
  position: absolute; inset: -4px;
  border-radius: 999px;
  border: 2px solid var(--solar);
  opacity: .5;
  animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse {
  0%   { transform: scale(.6); opacity: .6; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* Soft elevation card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}
.card-h {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: border-color .15s, transform .15s;
}
.card-h:hover { border-color: var(--border-strong); }

/* Chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--fg-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg);
  transition: background .12s, border-color .12s;
}
.btn:hover { background: var(--surface-2); border-color: var(--border-strong); }
.btn-primary {
  background: var(--accent);
  color: #0a1410;
  border-color: transparent;
}
.dark .btn-primary { color: #061410; }
.btn-primary:hover { filter: brightness(1.05); background: var(--accent); }
.btn-ghost {
  background: transparent;
  border-color: transparent;
}
.btn-ghost:hover { background: var(--surface-2); }

/* Inputs */
.input {
  width: 100%;
  padding: 10px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  font-size: 14px;
}
.input::placeholder { color: var(--fg-subtle); }
.input:focus { border-color: var(--accent); }

/* Segmented */
.segmented {
  display: inline-flex;
  padding: 3px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  gap: 2px;
}
.segmented button {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-muted);
  border-radius: 7px;
  white-space: nowrap;
}
.segmented button.active {
  background: var(--surface);
  color: var(--fg);
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.dark .segmented button.active { box-shadow: 0 1px 0 rgba(255,255,255,.04) inset; }

/* Tables */
.tbl { width: 100%; border-collapse: separate; border-spacing: 0; }
.tbl th, .tbl td {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
}
.tbl th {
  font-weight: 500;
  color: var(--fg-muted);
  background: var(--surface-2);
  position: sticky; top: 0;
}
.tbl tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover { background: var(--surface-2); }

/* Sidebar */
.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--fg-muted);
  font-weight: 500;
  cursor: pointer;
  transition: background .12s, color .12s;
}
.nav-link:hover { background: var(--surface-2); color: var(--fg); }
.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent);
}
.nav-link.active svg { color: var(--accent); }
.nav-section {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  padding: 0 12px;
  margin: 16px 0 6px;
}

/* Bottom mobile nav */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0;
  display: none;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
  z-index: 40;
}
.bottom-nav button {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; gap: 2px;
  padding: 6px 0;
  font-size: 10px;
  color: var(--fg-muted);
}
.bottom-nav button.active { color: var(--accent); }

@media (max-width: 900px) {
  .sidebar { display: none; }
  .bottom-nav { display: flex; }
  .main-pad { padding-bottom: 80px; }
}

/* Subtle gradient backgrounds for hero KPI */
.hero-bg {
  background:
    radial-gradient(120% 80% at 0% 0%, var(--accent-soft) 0%, transparent 60%),
    var(--surface);
}

/* Status dots */
.dot { width: 6px; height: 6px; border-radius: 999px; display: inline-block; }
.dot-solar  { background: var(--solar); }
.dot-grid   { background: var(--grid-imp); }
.dot-battery{ background: var(--battery); }
.dot-home   { background: var(--home); }
.dot-warn   { background: var(--warn); }
.dot-alarm  { background: var(--alarm); }
.dot-info   { background: var(--info); }

/* Smooth view transition */
.screen-enter {
  animation: fadeIn .25s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: none; }
}

/* Login bg */
.login-bg {
  background:
    radial-gradient(60% 50% at 50% 0%, var(--accent-soft) 0%, transparent 60%),
    var(--bg);
}

/* Misc */
.kbd {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--fg-muted);
}