:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #14161a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --track: #eceef2;
  --charging: #16a34a;
  --plugged: #2563eb;
  --idle: #9ca3af;
  --fault: #dc2626;
  --danger: #dc2626;
  --danger-armed: #991b1b;
  --primary: #16a34a;
  --banner-bg: #fff7ed;
  --banner-text: #9a3412;
  --accent: var(--idle);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0d10;
    --card: #15181d;
    --text: #f3f4f6;
    --muted: #9ca3af;
    --border: #262a31;
    --track: #232831;
    --charging: #22c55e;
    --plugged: #60a5fa;
    --idle: #6b7280;
    --fault: #f87171;
    --danger: #dc2626;
    --danger-armed: #ef4444;
    --primary: #16a34a;
    --banner-bg: #2a1a0e;
    --banner-text: #fdba74;
  }
}

:root[data-theme="dark"] {
  --bg: #0b0d10;
  --card: #15181d;
  --text: #f3f4f6;
  --muted: #9ca3af;
  --border: #262a31;
  --track: #232831;
  --charging: #22c55e;
  --plugged: #60a5fa;
  --idle: #6b7280;
  --fault: #f87171;
  --banner-bg: #2a1a0e;
  --banner-text: #fdba74;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}

body[data-state="charging"] { --accent: var(--charging); }
body[data-state="plugged"]  { --accent: var(--plugged); }
body[data-state="idle"], body[data-state="offline"], body[data-state="loading"] { --accent: var(--idle); }
body[data-state="fault"]    { --accent: var(--fault); }

.wrap {
  max-width: 520px;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
           max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
.narrow { max-width: 380px; padding-top: 12vh; }

h1 { font-size: 22px; margin: 0; letter-spacing: -0.01em; }
.muted { color: var(--muted); margin: 0; font-size: 14px; }
.center { text-align: center; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
.top .muted { margin-top: 2px; word-break: break-all; }

button { font: inherit; cursor: pointer; border: 0; }
button:disabled { opacity: .55; cursor: default; }
.ghost { background: transparent; color: var(--muted); padding: 6px 8px; border-radius: 10px; font-size: 14px; white-space: nowrap; }
.ghost:hover { color: var(--text); }

/* Hero gauge */
.hero { padding: 20px 20px 18px; display: flex; flex-direction: column; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent); font-weight: 600; font-size: 15px;
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
body[data-state="charging"] .dot { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .25; } }

.gauge { position: relative; width: min(56vw, 220px); aspect-ratio: 1; margin: 14px 0 6px; }
.gauge svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.gauge circle { fill: none; stroke-width: 12; }
.gauge .track { stroke: var(--track); }
.gauge .arc {
  stroke: var(--accent); stroke-linecap: round;
  stroke-dasharray: 552.92; stroke-dashoffset: 552.92;
  transition: stroke-dashoffset .8s ease, stroke .3s;
}
.reading { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.power { font-size: 56px; font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.unit { color: var(--muted); font-size: 16px; font-weight: 600; margin-top: 4px; }

.banner {
  margin-top: 12px; padding: 10px 14px; border-radius: 14px;
  background: var(--banner-bg); color: var(--banner-text); font-size: 14px;
}

/* Stats */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.stat { padding: 14px 16px; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.label { color: var(--muted); font-size: 13px; }
.value { font-size: 22px; font-weight: 650; letter-spacing: -0.01em; overflow-wrap: anywhere; }
.hint { color: var(--muted); font-size: 12px; line-height: 1.3; }

/* Actions */
.actions { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.actions:not(:has(button:not([hidden]), p:not(:empty))) { display: none; }
.big {
  width: 100%; padding: 17px 20px; border-radius: 16px;
  font-size: 18px; font-weight: 650; color: #fff;
  transition: background .15s, transform .05s;
}
.big:active:not(:disabled) { transform: scale(.985); }
.danger { background: var(--danger); }
.danger.armed { background: var(--danger-armed); box-shadow: 0 0 0 4px color-mix(in srgb, var(--danger) 30%, transparent); }
.primary { background: var(--primary); }
#actionMsg:empty { display: none; }

footer { margin-top: 18px; }

/* Login */
.logo { display: block; margin: 0 auto 12px; border-radius: 16px; }
.form { padding: 20px; margin-top: 20px; display: flex; flex-direction: column; gap: 14px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.form input {
  font: inherit; font-size: 17px; color: var(--text);
  padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg);
}
.form input:focus { outline: 2px solid var(--plugged); outline-offset: 1px; }
.error { color: var(--fault); margin: 0; font-size: 14px; min-height: 1.2em; }

@media (max-width: 360px) {
  .power { font-size: 46px; }
  .value { font-size: 19px; }
}