:root {
  color-scheme: dark;
  --bg: #0b1220;
  --bg-2: #10182c;
  --card: rgba(23, 30, 51, 0.6);
  --card-border: rgba(148, 178, 214, 0.14);
  --text: #eef2f8;
  --muted: #8996ac;
  --cyan: #22d3ee;
  --amber: #ffb703;
  --violet: #a78bfa;
  --good: #34e0a1;
  --bad: #ff5a7a;
  --waiting: #ffb703;
}

* { box-sizing: border-box; }

form { margin: 0; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(120% 140% at 15% -10%, #16224a 0%, var(--bg) 45%) fixed;
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------- decorative background ---------- */

.bg-fx {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bg-glow {
  position: absolute;
  width: 60vmax;
  height: 60vmax;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.22;
}

.bg-glow-cyan {
  top: -20vmax;
  left: -15vmax;
  background: var(--cyan);
  animation: drift 22s ease-in-out infinite alternate;
}

.bg-glow-amber {
  bottom: -25vmax;
  right: -15vmax;
  background: var(--amber);
  opacity: 0.14;
  animation: drift 26s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(4vmax, 3vmax) scale(1.08); }
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(148, 178, 214, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 178, 214, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(80% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* ---------- layout ---------- */

main {
  max-width: 960px;
  margin: 0 auto;
  padding: calc(24px + env(safe-area-inset-top)) calc(16px + env(safe-area-inset-right))
    calc(64px + env(safe-area-inset-bottom)) calc(16px + env(safe-area-inset-left));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 28px;
}

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

.brand-icon {
  border-radius: 22%;
  box-shadow: 0 4px 18px rgba(34, 211, 238, 0.35);
  display: block;
}

.brand-text h1 {
  font-size: 1.25rem;
  margin: 0;
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.conn {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--muted);
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 rgba(0,0,0,0);
}
.dot-on { background: var(--good); box-shadow: 0 0 10px 2px rgba(52, 224, 161, 0.7); }
.dot-off { background: var(--bad); box-shadow: 0 0 10px 2px rgba(255, 90, 122, 0.5); }

/* ---------- power flow hero ---------- */

.flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 26px 12px;
  margin-bottom: 20px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 84px;
}

.flow-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.flow-icon-sun { color: var(--amber); box-shadow: 0 0 22px -4px rgba(255, 183, 3, 0.6); }
.flow-icon-house { color: #b8c4da; }
.flow-icon-bolt { color: var(--cyan); box-shadow: 0 0 22px -4px rgba(34, 211, 238, 0.6); }

.flow-value {
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.flow-label {
  font-size: 0.68rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.flow-line {
  flex: 1;
  min-width: 24px;
  max-width: 90px;
  height: 2px;
  margin: 0 4px 22px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.flow-line i {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  width: 40%;
  transform: translateX(-100%);
  opacity: 0;
}

.flow-line.active i {
  opacity: 1;
  animation: flow-move 1.6s linear infinite;
}

@keyframes flow-move {
  from { transform: translateX(-100%); }
  to { transform: translateX(350%); }
}

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-left: 3px solid transparent;
  border-radius: 16px;
  padding: 18px 20px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: relative;
}

.card-accent-cyan { border-left-color: var(--cyan); }
.card-accent-amber { border-left-color: var(--amber); }
.card-accent-violet { border-left-color: var(--violet); }

.card h2 {
  margin: 0 0 14px;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

dl {
  display: grid;
  grid-template-columns: 1fr auto;
  row-gap: 9px;
  margin: 0;
}

dt { color: var(--muted); font-size: 0.88rem; }
dd { margin: 0; font-weight: 600; text-align: right; font-variant-numeric: tabular-nums; }

.error {
  color: var(--bad);
  font-size: 0.85rem;
}

.decision-pill {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: capitalize;
  letter-spacing: 0.02em;
  background: rgba(137, 150, 172, 0.15);
  color: var(--muted);
}

.decision-pill.charging {
  background: rgba(34, 211, 238, 0.15);
  color: var(--cyan);
  box-shadow: 0 0 16px -6px rgba(34, 211, 238, 0.8);
}

.decision-pill.idle {
  background: rgba(137, 150, 172, 0.15);
  color: #b8c4da;
}

.decision-pill.waiting_for_stability {
  background: rgba(255, 183, 3, 0.15);
  color: var(--waiting);
}

.decision-pill.unavailable {
  background: rgba(255, 90, 122, 0.15);
  color: var(--bad);
}

/* battery gauge */

.battery-gauge {
  position: relative;
  height: 22px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 16px;
  overflow: hidden;
}

.battery-gauge-fill {
  position: absolute;
  inset: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--bad), var(--waiting) 55%, var(--good));
  transition: width 0.6s ease;
}

.battery-gauge-label {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.65);
}

/* ---------- override / controls ---------- */

.glass {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 18px 20px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.override h2 {
  margin-top: 0;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.buffer-row label {
  display: block;
  margin-bottom: 8px;
}

.buffer-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.buffer-controls input[type="range"] {
  flex: 1;
  min-width: 140px;
  accent-color: var(--cyan);
}

.buffer-unit {
  color: var(--muted);
  font-size: 0.85rem;
}

button {
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  color: var(--text);
  border: 1px solid rgba(148, 178, 214, 0.25);
  border-radius: 10px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

button:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 14px -6px rgba(34, 211, 238, 0.7);
}

input {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(148, 178, 214, 0.25);
  border-radius: 8px;
  color: var(--text);
  padding: 7px 10px;
  width: 90px;
  font-size: 16px; /* iOS Safari zooms on focus for inputs below 16px */
}

select {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(148, 178, 214, 0.25);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
  width: 100%;
  font-size: 16px; /* iOS Safari zooms on focus for selects below 16px */
}

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--muted);
}

.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 26px;
  flex-shrink: 0;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
  position: absolute;
  inset: 0;
  background: rgba(148, 178, 214, 0.2);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s;
}

.slider::before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  top: 3px;
  background: var(--text);
  border-radius: 50%;
  transition: transform 0.15s;
}

.switch input:checked + .slider {
  background: var(--good);
  box-shadow: 0 0 16px -2px rgba(52, 224, 161, 0.8);
}
.switch input:checked + .slider::before { transform: translateX(20px); }

#enabled-label { font-weight: 600; }

#override-message { min-height: 1.2em; font-size: 0.9rem; color: var(--muted); }

@media (max-width: 480px) {
  main { padding-top: calc(16px + env(safe-area-inset-top)); }

  .brand-text h1 { font-size: 1.1rem; }

  .flow { padding: 20px 8px; }
  .flow-node { min-width: 68px; }
  .flow-icon { width: 44px; height: 44px; font-size: 1.2rem; }
  .flow-value { font-size: 0.92rem; }
  .flow-line { max-width: 48px; }

  .cards { grid-template-columns: 1fr; }

  .card, .glass { padding: 15px 16px; }

  button {
    padding: 11px 16px;
    font-size: 1rem;
    min-height: 44px;
  }

  .switch {
    width: 54px;
    height: 32px;
  }

  .switch .slider::before {
    width: 26px;
    height: 26px;
  }

  .switch input:checked + .slider::before { transform: translateX(22px); }

  select { min-height: 44px; }
}