:root {
  --bg: #0e1117;
  --bg-soft: #151b24;
  --card: #161d27;
  --card-head: #1b2430;
  --border: #243040;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #4aa3ff;
  --accent-2: #ffb13b;
  --good: #2ec27e;
  --bad: #ff5c5c;
  --warn: #f1c40f;
  --grid: #20293570;
  --obs: #4aa3ff;     /* observed / actual */
  --fc: #ffb13b;      /* forecast */
  --fc2: #b07bff;     /* secondary forecast */
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 80% -10%, #16233355, transparent), var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  min-height: 100vh;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; padding: 14px 22px;
  background: linear-gradient(180deg, #131a23, #0f141b);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 28px; filter: drop-shadow(0 0 8px #ffb13b88); }
.brand h1 { font-size: 18px; margin: 0; letter-spacing: .2px; }
.subtitle { color: var(--muted); font-size: 12px; }

.controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.loc { position: relative; }
.loc input {
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  padding: 8px 12px; border-radius: 8px; width: 200px; outline: none;
}
.loc input:focus { border-color: var(--accent); }
.loc-current {
  position: absolute; right: -2px; top: -16px; font-size: 11px; color: var(--muted);
}
.loc-results {
  position: absolute; top: 40px; left: 0; right: 0; z-index: 100;
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: var(--shadow); overflow: hidden;
}
.loc-results div { padding: 8px 12px; cursor: pointer; }
.loc-results div:hover { background: var(--card-head); }
.loc-results small { color: var(--muted); }

.seg { display: inline-flex; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { background: transparent; border: none; color: var(--muted); padding: 8px 12px; cursor: pointer; font-size: 13px; }
.seg button.active { background: var(--accent); color: #04101e; font-weight: 600; }

.auto { color: var(--muted); display: flex; align-items: center; gap: 5px; font-size: 13px; cursor: pointer; }

.btn {
  background: var(--accent); color: #04101e; border: none; border-radius: 8px;
  padding: 8px 14px; cursor: pointer; font-weight: 600; font-size: 13px;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 4px; padding: 10px 22px 0; border-bottom: 1px solid var(--border); }
.tab {
  background: transparent; border: 1px solid transparent; border-bottom: none;
  color: var(--muted); padding: 9px 18px; cursor: pointer; font-size: 14px; font-weight: 600;
  border-radius: 10px 10px 0 0;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); background: var(--card); border-color: var(--border); }

/* ---------- Battery sub-tabs ---------- */
.subtabs { display: flex; gap: 6px; padding: 14px 22px 0; }
.subtab {
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--muted);
  padding: 7px 16px; cursor: pointer; font-size: 13px; font-weight: 600; border-radius: 8px;
}
.subtab:hover { color: var(--text); }
.subtab.active { background: var(--accent); color: #04101e; border-color: var(--accent); }

/* ---------- Battery summary cards ---------- */
.bat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 16px 22px; }
.bat-cards.single { grid-template-columns: minmax(280px, 440px); }
.bat-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.bat-card .bc-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; background: var(--card-head); border-bottom: 1px solid var(--border); }
.bat-card .bc-head h3 { margin: 0; font-size: 16px; }
.bat-card .bc-tag { font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }
.bat-card .bc-tag.fcr-on { color: var(--good); border-color: #1c5a39; background: #10311f; }
.bat-card .bc-body { padding: 14px 16px; }
.soc-bar { height: 12px; border-radius: 6px; background: var(--bg-soft); border: 1px solid var(--border); overflow: hidden; margin: 6px 0 4px; }
.soc-fill { height: 100%; background: linear-gradient(90deg, #2ec27e, #4aa3ff); }
.bc-soc-val { font-size: 22px; font-weight: 700; }
.bc-rows { margin-top: 12px; display: grid; gap: 7px; }
.bc-row { display: flex; align-items: center; justify-content: space-between; font-size: 13px; }
.bc-row .lbl { color: var(--muted); }
.bc-row .val { font-weight: 600; }
.bc-row .val small { color: var(--muted); font-weight: 500; }

/* ---------- Status ---------- */
.statusbar { display: flex; align-items: center; gap: 10px; padding: 10px 22px 0; flex-wrap: wrap; }
.pill { font-size: 12px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); }
.pill-ok { background: #10311f; color: var(--good); border-color: #1c5a39; }
.pill-bad { background: #3a1515; color: var(--bad); border-color: #6a2a2a; }
.pill-unknown { background: var(--bg-soft); color: var(--muted); }
.win-range { color: var(--text); font-size: 12px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 3px 10px; }
.updated { color: var(--muted); font-size: 12px; margin-left: auto; }

/* ---------- KPIs ---------- */
.kpis {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px; padding: 14px 22px;
}
.kpi {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 14px; box-shadow: var(--shadow);
}
.kpi .k-label { color: var(--muted); font-size: 12px; }
.kpi .k-value { font-size: 24px; font-weight: 700; margin-top: 4px; }
.kpi .k-unit { font-size: 13px; color: var(--muted); font-weight: 500; margin-left: 4px; }
.kpi .k-sub { color: var(--muted); font-size: 11px; margin-top: 2px; }

/* ---------- Grid of cards ---------- */
.grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; padding: 4px 22px 24px;
}
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden;
}
.card.span2 { grid-column: span 2; }
.card-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: var(--card-head); border-bottom: 1px solid var(--border);
}
.card-head h2 { font-size: 14px; margin: 0; font-weight: 600; }
.card-head .src { color: var(--muted); font-size: 11px; }
.chart-wrap { position: relative; height: 280px; padding: 12px 14px 16px; }

.empty-note {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 13px; text-align: center; padding: 20px;
}

.foot { color: var(--muted); font-size: 12px; padding: 8px 22px 28px; text-align: center; }

.hidden { display: none !important; }

@media (max-width: 1100px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .card.span2 { grid-column: span 2; }
}
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .card.span2 { grid-column: span 1; }
  .topbar { flex-direction: column; align-items: stretch; }
}