:root {
  --bg: #0f1419;
  --card: #1a2129;
  --line: #2a333d;
  --txt: #e6edf3;
  --mut: #8b949e;
  --l1: #f0883e;
  --l2: #3fb950;
  --l3: #58a6ff;
  --ok: #3fb950;
  --danger: #f85149;
  --warn: #d29922;
  --radius: 10px;
}

* { box-sizing: border-box; }
/* display:grid/flex on .grid/.alarms would otherwise override the hidden attribute */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--txt);
}

.muted { color: var(--mut); }
.small { font-size: 13px; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; flex-wrap: wrap; gap: 12px;
  align-items: center; justify-content: space-between;
  padding: 0 0 14px; margin-bottom: 16px; border-bottom: 1px solid var(--line);
}
.topbar h1 { font-size: 18px; margin: 0; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.topbar h1 .muted { font-size: 13px; font-weight: 500; }
.topbar-right { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

select {
  background: var(--card); color: var(--txt);
  border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px;
  font: inherit; font-size: 13px;
}

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 99px; background: var(--card); font-size: 13px;
}
.pill.stale { background: #3d1d1d; color: #ffb4ae; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--danger); }
.dot.on { background: var(--ok); box-shadow: 0 0 8px var(--ok); }

/* ---------- layout ---------- */
main { padding: 16px 20px; max-width: 1300px; margin: auto; }
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-bottom: 14px;
}
.wide { grid-column: 1 / -1; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px;
}
.card h2 {
  font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--mut); margin: 0 0 10px; display: flex; align-items: center; gap: 6px;
}
.card h2 .ti { font-size: 15px; }

.big { font-size: 34px; font-weight: 600; font-variant-numeric: tabular-nums; }
.unit { font-size: 15px; color: var(--mut); margin-left: 4px; font-weight: 500; }

/* ---------- tables / key-value ---------- */
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 6px 4px; text-align: right; border-bottom: 1px solid var(--line); font-size: 14px; }
th:first-child, td:first-child { text-align: left; color: var(--mut); font-weight: 500; }
th.l1 { color: var(--l1); } th.l2 { color: var(--l2); } th.l3 { color: var(--l3); }

.kv { display: flex; justify-content: space-between; padding: 4px 0; font-size: 14px; font-variant-numeric: tabular-nums; }
.kv span:first-child { color: var(--mut); }

.chart { height: 260px; }

/* ---------- Sankey (grid -> phases) ---------- */
.sankey { width: 100%; height: auto; display: block; }
.sankey .sk-ribbon { opacity: .38; transition: d .6s ease, opacity .2s; }
.sankey .sk-ribbon:hover { opacity: .6; }
.sankey .sk-node { transition: y .6s ease, height .6s ease; }
.sankey .sk-label { fill: var(--txt); font-size: 15px; font-weight: 600; }
.sankey .sk-value { fill: var(--mut); font-size: 13px; font-variant-numeric: tabular-nums; }
.sankey .sk-value.sk-export { fill: var(--warn); }
.sankey .sk-exp-tag { fill: var(--warn); font-size: .8em; font-weight: 600; }
.sankey .sk-leader { fill: none; stroke-width: 1.5; opacity: .55; transition: d .6s ease; }
.sankey text { transition: y .6s ease; }
@media (max-width: 600px) {
  .sankey .sk-label { font-size: 22px; }
  .sankey .sk-value { font-size: 19px; }
}
@media (prefers-reduced-motion: reduce) {
  .sankey .sk-ribbon, .sankey .sk-node, .sankey .sk-leader, .sankey text { transition: none; }
}

/* ---------- real-time chart ---------- */
.live-badge {
  margin-left: auto; display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; letter-spacing: .08em; color: var(--ok);
}
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); animation: live 1.2s ease-in-out infinite; }
@keyframes live { 50% { opacity: .25; } }
#app.stale ~ #trends .live-badge, .live-badge.off { color: var(--mut); }
.live-badge.off .live-dot { background: var(--mut); animation: none; }

/* ---------- daily min / max ---------- */
.mm-day { text-transform: none; letter-spacing: 0; font-weight: 500; margin-left: auto; }
table.minmax th.mm-time, table.minmax td.mm-time { color: var(--mut); font-size: 12px; width: 70px; }
table.minmax td.mm-min { color: var(--l3); }
table.minmax td.mm-max { color: var(--l1); }
table.minmax tr.mm-group td { border-top: 1px solid var(--line); }
table.minmax .ph { font-weight: 600; margin-left: 4px; }
table.minmax .ph.l1 { color: var(--l1); } table.minmax .ph.l2 { color: var(--l2); } table.minmax .ph.l3 { color: var(--l3); }
@media (max-width: 600px) {
  table.minmax th.mm-time, table.minmax td.mm-time { width: auto; font-size: 11px; }
}

.empty { color: var(--mut); text-align: center; padding: 60px 0; }

/* ---------- live / stale feedback ---------- */
.flash { animation: flash .6s; }
@keyframes flash { from { color: #fff; text-shadow: 0 0 6px #fff; } to {} }
#app.stale .big, #app.stale td, #app.stale .kv b { opacity: .45; }

/* ---------- connection error (same as solar-mqtt-dashboard) ---------- */
.conn-error {
  max-width: 420px;
  margin: 3rem auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 3rem 1.5rem;
  text-align: center;
}
.conn-error-icon {
  color: var(--danger);
  margin-bottom: .75rem;
  animation: conn-error-pulse 1.4s ease-in-out infinite;
}
@keyframes conn-error-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}
.conn-error-title { font-weight: 600; font-size: 1.05rem; margin-bottom: .35rem; }
.conn-error-sub { color: var(--mut); font-size: .85rem; line-height: 1.5; }

/* ---------- alarms ---------- */
.alarms { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.alarm-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius);
  border: 1px solid; font-size: 14px;
}
.alarm-item .ti { font-size: 18px; }
.alarm-item .since { margin-left: auto; font-size: 12px; opacity: .8; white-space: nowrap; }
.alarm-item.crit { background: #3d1d1d; border-color: var(--danger); color: #ffb4ae; }
.alarm-item.warn { background: #3a2c12; border-color: var(--warn); color: #f5d38a; }

/* highlighted values */
.card.alarm-crit { --ac: var(--danger); }
.card.alarm-warn { --ac: var(--warn); }
.card.alarm-crit, .card.alarm-warn { border-color: var(--ac); box-shadow: 0 0 0 1px var(--ac) inset; }
td.alarm-crit, b.alarm-crit, span.alarm-crit { color: var(--danger) !important; font-weight: 700; }
td.alarm-warn, b.alarm-warn, span.alarm-warn { color: var(--warn) !important; font-weight: 700; }
.card.alarm-crit, .card.alarm-warn { animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 1px var(--ac) inset, 0 0 14px -2px var(--ac); } }

footer { text-align: center; padding: 20px; }

@media (max-width: 600px) {
  main { padding-left: 16px; padding-right: 16px; }
  .big { font-size: 28px; }
  th, td { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .flash, .card.alarm-crit, .card.alarm-warn, .conn-error-icon, .live-dot { animation: none; }
}