@import url("https://fonts.googleapis.com/css2?family=Fredoka:wght@500;600;700&family=Inter:wght@400;500;600;700&display=swap");

:root {
  --bg: #10151a;
  --bg-glow-1: #1a2e22;
  --bg-glow-2: #14202b;
  --card: #1b2521;
  --card-border: #2e3f36;
  --ink: #eaf2ea;
  --ink-muted: #9fb3a8;
  --ink-sub: #6f8478;

  --green: #4fd18b;
  --amber: #f4c95d;
  --blue: #6fb8ff;
  --orange: #ff9f5a;
  --red: #ff6b6b;

  --radius-lg: 22px;
  --radius-md: 14px;
  --font-display: "Fredoka", -apple-system, sans-serif;
  --font-body: "Inter", -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at 15% 0%, var(--bg-glow-1), transparent 55%),
              radial-gradient(circle at 100% 20%, var(--bg-glow-2), transparent 45%),
              var(--bg);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: max(1rem, env(safe-area-inset-top)) 1rem max(1.5rem, env(safe-area-inset-bottom));
  gap: 1rem;
}

.stage {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: .85rem;
}

/* ---------- header ---------- */
.topbar {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .25rem .1rem;
}
.brand { display: flex; align-items: center; gap: .6rem; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.brand h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  margin: 0;
  letter-spacing: .01em;
}
.topbar a.icon-link {
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  padding: .4rem;
  border-radius: 10px;
}
.topbar a.icon-link:active { background: var(--card); }

/* ---------- status banner ---------- */
.status-banner {
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--card-border);
  background: linear-gradient(160deg, rgba(255,255,255,.03), rgba(255,255,255,0));
  display: flex;
  flex-direction: column;
  gap: .35rem;
}
.status-banner .headline {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.status-banner .dot {
  width: 11px; height: 11px; border-radius: 50%;
  flex: none;
  background: currentColor;
}
.status-banner.charging { color: var(--green); }
.status-banner.steady { color: var(--amber); }
.status-banner.discharging-ok { color: var(--blue); }
.status-banner.discharging-moderate { color: var(--orange); }
.status-banner.discharging-low { color: var(--red); }
.status-banner .detail { color: var(--ink-muted); font-size: .92rem; line-height: 1.4; }
.status-banner .headroom-hint { color: var(--ink-sub); font-size: .8rem; margin-top: .2rem; }

/* ---------- flow + cards ---------- */
.flow-track {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.2rem;
}
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
}
.card-title {
  display: flex;
  align-items: center;
  gap: .55rem;
  color: var(--ink-muted);
  font-size: .95rem;
}
.card-title svg { width: 19px; height: 19px; }
.card-value {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 600;
  margin-top: .15rem;
}
.card-sub { color: var(--ink-sub); font-size: .82rem; margin-top: .1rem; }

.soc-bar-track {
  width: 100%; height: 10px; border-radius: 6px;
  background: #10221a;
  overflow: hidden;
  margin-top: .7rem;
}
.soc-bar-fill {
  height: 100%; border-radius: 6px;
  background: linear-gradient(90deg, var(--amber), var(--green));
  transition: width .6s ease;
}

.details-toggle {
  border: none;
  background: none;
  color: var(--ink-sub);
  font-size: .82rem;
  display: flex;
  align-items: center;
  gap: .3rem;
  padding: 0;
  margin-top: .55rem;
  cursor: pointer;
}
.details-toggle svg { width: 14px; height: 14px; transition: transform .25s ease; }
.details-toggle.open svg { transform: rotate(180deg); }

.details-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .55rem .8rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, opacity .3s ease, margin-top .3s ease;
  opacity: 0;
}
.details-panel.open {
  max-height: 300px;
  opacity: 1;
  margin-top: .7rem;
  padding-top: .7rem;
  border-top: 1px solid var(--card-border);
}
.detail-row { display: flex; flex-direction: column; }
.detail-row .k { font-size: .72rem; color: var(--ink-sub); text-transform: uppercase; letter-spacing: .04em; }
.detail-row .v { font-size: .98rem; color: var(--ink); font-weight: 500; }
.detail-row.full { grid-column: 1 / -1; }

.alarm-chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  background: rgba(255,107,107,.12);
  color: var(--red);
  border-radius: 8px;
  padding: .25rem .5rem;
  font-size: .78rem;
  margin-top: .5rem;
}

/* connector between cards */
.connector {
  display: flex;
  justify-content: center;
  height: 34px;
  position: relative;
}
.connector svg { height: 100%; }
.connector path {
  fill: none;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 9 9;
  opacity: .85;
  animation: dash 1s linear infinite;
}
.connector.off path { opacity: .1; animation-play-state: paused; }
.connector.solar path { stroke: var(--amber); }
.connector.charge path { stroke: var(--green); }
.connector.discharge path { stroke: var(--orange); animation-direction: reverse; }
.connector.load path { stroke: var(--blue); }
@keyframes dash { to { stroke-dashoffset: -18; } }

.footer-links {
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-sub);
  font-size: .82rem;
  padding: .2rem .3rem;
}
.footer-links a { color: var(--ink-muted); text-decoration: none; display: flex; align-items: center; gap: .3rem; }
.footer-links svg { width: 15px; height: 15px; }

.updated-row {
  display: flex;
  align-items: center;
  gap: .35rem;
}
.updated-row.stale { color: var(--red); }

@media (min-width: 560px) {
  .stage, .footer-links { max-width: 560px; }
}