/* =========================================================================
   Solar Monitor — design system
   ========================================================================= */

:root {
  --bg:        #070a0f;
  --bg-soft:   #0b1017;

  --text:      #e9eef6;
  --muted:     #96a3b4;
  --dim:       #5f6b7b;

  --line:      rgba(255, 255, 255, 0.075);
  --line-soft: rgba(255, 255, 255, 0.045);

  --solar:      #ffb020;
  --solar-soft: rgba(255, 176, 32, 0.14);
  --solar-dim:  #ffc86b;

  --load:      #4cc9f0;
  --load-soft: rgba(76, 201, 240, 0.14);
  --load-dim:  #7fdcfa;

  --ok:      #34d399;
  --ok-soft: rgba(52, 211, 153, 0.14);
  --bad:     #ff6b6b;

  --radius:    22px;
  --radius-sm: 14px;

  --shadow: 0 1px 0 rgba(255, 255, 255, 0.045) inset,
            0 34px 60px -40px rgba(0, 0, 0, 0.9);

  --font: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system,
          "Inter", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", "Segoe UI Mono", Consolas, monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  scrollbar-color: #232c38 var(--bg);
}

body {
  margin: 0 auto;
  width: 100%;
  max-width: 1480px;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 1.7vw, 22px);
  padding: clamp(16px, 2.1vw, 30px);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, dl, dd { margin: 0; }

a { color: inherit; }

::selection { background: rgba(255, 176, 32, 0.28); }

:focus-visible {
  outline: 2px solid var(--solar);
  outline-offset: 3px;
  border-radius: 6px;
}

/* -------------------------------------------------------------------------
   Ambient background
   ------------------------------------------------------------------------- */

.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1000px 640px at 10% -12%, rgba(255, 176, 32, 0.10), transparent 62%),
    radial-gradient(900px 620px at 102% -6%, rgba(76, 201, 240, 0.075), transparent 58%),
    radial-gradient(1200px 900px at 50% 122%, rgba(52, 211, 153, 0.06), transparent 62%),
    var(--bg);
}

.ambient::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 50% 22%, #000 0%, transparent 74%);
  mask-image: radial-gradient(circle at 50% 22%, #000 0%, transparent 74%);
}

/* -------------------------------------------------------------------------
   Top bar
   ------------------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 26px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: none;
}

.brand__mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: var(--solar);
  background: linear-gradient(150deg, rgba(255, 176, 32, 0.22), rgba(255, 176, 32, 0.04));
  border: 1px solid rgba(255, 176, 32, 0.24);
  box-shadow: 0 0 26px -8px rgba(255, 176, 32, 0.5);
}

.brand__mark svg { width: 21px; height: 21px; }

.brand__text {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.brand__text b {
  color: var(--text);
  font-weight: 600;
}

.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.nav a {
  padding: 7px 17px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: 0.01em;
  color: var(--muted);
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav a:hover { color: var(--text); }

.nav a.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.085);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset;
}

.clock {
  flex: none;
  text-align: right;
  min-width: 172px;
}

.clock__date {
  font-size: 11.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}

.clock__time {
  display: flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: 7px;
  margin-top: 1px;
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.clock__tz {
  font-size: 10px;
  font-family: var(--font);
  letter-spacing: 0.13em;
  color: var(--solar);
  opacity: 0.8;
}

/* -------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------- */

.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 1.9vw, 26px);
  background:
    linear-gradient(178deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.012) 62%),
    rgba(11, 16, 23, 0.55);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
  opacity: 0.7;
  pointer-events: none;
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card__head--wrap {
  flex-wrap: wrap;
  align-items: flex-start;
}

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}

.card__sub {
  margin-top: 5px;
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* -------------------------------------------------------------------------
   Dashboard grid
   ------------------------------------------------------------------------- */

.dash {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.24fr);
  grid-template-rows: auto auto;
  align-content: center;
  gap: clamp(14px, 1.5vw, 18px);
}

.hero { grid-column: 1; grid-row: 1 / span 2; display: flex; flex-direction: column; }
.power { grid-column: 2; grid-row: 1; }
.capacity {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* -------------------------------------------------------------------------
   Hero — state of charge
   ------------------------------------------------------------------------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  white-space: nowrap;
}

.pill__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.045);
}

.pill[data-state="charging"] {
  color: var(--ok);
  border-color: rgba(52, 211, 153, 0.32);
  background: var(--ok-soft);
}

.pill[data-state="charging"] .pill__dot { animation: pulse 2.2s ease-in-out infinite; }

.pill[data-state="discharging"] {
  color: var(--solar);
  border-color: rgba(255, 176, 32, 0.3);
  background: var(--solar-soft);
}

.pill[data-state="idle"] { color: var(--dim); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.3; }
}

.gauge {
  position: relative;
  flex: 1;
  display: grid;
  place-items: center;
  width: min(100%, 500px, 50vh);
  aspect-ratio: 1;
  margin: clamp(6px, 1vw, 14px) auto 0;
}

.gauge__svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  overflow: visible;
}

.gauge__track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.055);
  stroke-width: 15;
}

.gauge__fill {
  fill: none;
  stroke: url(#gaugeGrad);
  stroke-width: 15;
  stroke-linecap: round;
  stroke-dasharray: 603.19;
  stroke-dashoffset: 603.19;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.22, 0.61, 0.36, 1);
  filter: drop-shadow(0 0 16px rgba(52, 211, 153, 0.35));
}

.battery-low .gauge__fill {
  stroke: url(#gaugeGradLow);
  filter: drop-shadow(0 0 16px rgba(255, 107, 107, 0.4));
}

.gauge__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.gauge__value {
  display: flex;
  align-items: flex-start;
  gap: 3px;
  font-size: clamp(58px, 7.6vw, 118px);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: -0.048em;
  font-variant-numeric: tabular-nums;
  color: #f4f8fd;
  text-shadow: 0 0 40px rgba(52, 211, 153, 0.18);
}

.gauge__unit {
  margin-top: 0.24em;
  font-size: 0.3em;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--muted);
}

.gauge__caption {
  margin-top: 10px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
}

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: clamp(14px, 2vw, 24px);
  padding-top: clamp(14px, 1.6vw, 20px);
  border-top: 1px solid var(--line-soft);
}

.fact dt {
  font-size: 10.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dim);
}

.fact dd {
  margin-top: 5px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  transition: color 0.3s ease;
}

.fact dd.is-stale { color: var(--solar); }

/* -------------------------------------------------------------------------
   Power dials
   ------------------------------------------------------------------------- */

.power {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(14px, 1.5vw, 18px);
}

.power__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 0;
}

.mini-icon {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.mini-icon svg { width: 16px; height: 16px; }

.power__card[data-tone="solar"] .mini-icon {
  color: var(--solar);
  border-color: rgba(255, 176, 32, 0.26);
  background: var(--solar-soft);
}

.power__card[data-tone="load"] .mini-icon {
  color: var(--load);
  border-color: rgba(76, 201, 240, 0.26);
  background: var(--load-soft);
}

.dial {
  position: relative;
  margin-top: auto;
  padding-top: 6px;
}

.dial svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.dial__track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.06);
  stroke-width: 11;
  stroke-linecap: round;
}

.dial__fill {
  fill: none;
  stroke-width: 11;
  stroke-linecap: round;
  stroke-dasharray: 299.5;
  stroke-dashoffset: 299.5;
  transition: stroke-dashoffset 1s cubic-bezier(0.22, 0.61, 0.36, 1);
}

[data-tone="solar"] .dial__fill {
  stroke: var(--solar);
  filter: drop-shadow(0 0 10px rgba(255, 176, 32, 0.5));
}

[data-tone="load"] .dial__fill {
  stroke: var(--load);
  filter: drop-shadow(0 0 10px rgba(76, 201, 240, 0.45));
}

.dial__readout {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: #f2f7fd;
  pointer-events: none;
}

.dial__readout small {
  font-size: 0.34em;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.dial__foot {
  margin: 2px 0 auto;
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--dim);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* -------------------------------------------------------------------------
   Capacity meter
   ------------------------------------------------------------------------- */

.chip {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.meter {
  position: relative;
  height: 52px;
  margin-top: 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.045);
  overflow: hidden;
}

.meter__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  border-radius: 12px;
  background: linear-gradient(95deg, #e08b12, #ffb020 45%, #ffd27a);
  transition: width 1s cubic-bezier(0.22, 0.61, 0.36, 1);
  overflow: hidden;
}

.meter__fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 15%, rgba(255, 255, 255, 0.38) 50%, transparent 85%);
  transform: translateX(-100%);
  animation: sheen 6.5s ease-in-out infinite;
}

@keyframes sheen {
  0%, 55%   { transform: translateX(-100%); }
  85%, 100% { transform: translateX(100%); }
}

.meter__ticks {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(0, 0, 0, 0.26) 0 1px,
    transparent 1px 10%
  );
}

.meter__pct {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.55);
  font-variant-numeric: tabular-nums;
}

.meter__scale {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}

/* -------------------------------------------------------------------------
   Footer + status banner
   ------------------------------------------------------------------------- */

.foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 0 4px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}

.banner {
  position: fixed;
  left: 50%;
  bottom: 22px;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(-50%);
  padding: 10px 16px;
  border: 1px solid rgba(255, 107, 107, 0.34);
  border-radius: 12px;
  background: rgba(38, 12, 14, 0.94);
  color: #ffd9d9;
  font-size: 13px;
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(8px);
}

.banner[hidden] { display: none; }

.banner__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bad);
  animation: pulse 1.4s ease-in-out infinite;
}

.banner--static {
  position: static;
  transform: none;
  margin-top: 12px;
  justify-content: center;
}

/* -------------------------------------------------------------------------
   History page
   ------------------------------------------------------------------------- */

.page--history .history {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 1.5vw, 18px);
  min-height: 0;
}

.chart-card {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.controls {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
  flex-wrap: wrap;
}

.legend {
  display: flex;
  gap: 16px;
  font-size: 12.5px;
  color: var(--muted);
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.legend__item i {
  width: 9px;
  height: 9px;
  border-radius: 2.5px;
  background: currentColor;
}

.legend__item[data-tone="solar"] i {
  background: var(--solar);
  box-shadow: 0 0 9px rgba(255, 176, 32, 0.55);
}

.legend__item[data-tone="load"] i {
  background: var(--load);
  box-shadow: 0 0 9px rgba(76, 201, 240, 0.5);
}

.select {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.select__label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}

.select select {
  appearance: none;
  -webkit-appearance: none;
  min-width: 116px;
  padding: 9px 34px 9px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background-color: rgba(255, 255, 255, 0.055);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%2396a3b4' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.select select:hover { border-color: rgba(255, 255, 255, 0.16); }

.select select:focus-visible { outline: 2px solid var(--solar); outline-offset: 2px; }

.select select option {
  background: #10161e;
  color: var(--text);
}

.chart-wrap {
  position: relative;
  flex: 1;
  min-height: 320px;
  height: clamp(320px, 48vh, 470px);
  margin-top: clamp(14px, 2vw, 22px);
}

.chart-wrap canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

.chart-tip {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 5;
  padding: 9px 11px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 10px;
  background: rgba(10, 14, 20, 0.94);
  box-shadow: 0 18px 36px -18px rgba(0, 0, 0, 0.9);
  font-size: 12.5px;
  line-height: 1.35;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, -116%);
  transition: opacity 0.12s ease;
  pointer-events: none;
  backdrop-filter: blur(6px);
}

.chart-tip.is-visible { opacity: 1; }

.chart-tip__time {
  color: var(--dim);
  font-size: 11px;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.chart-tip__row {
  display: flex;
  align-items: center;
  gap: 7px;
  font-variant-numeric: tabular-nums;
}

.chart-tip__row i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: none;
}

.chart-tip__row span { color: var(--muted); }
.chart-tip__row b { margin-left: auto; font-weight: 600; color: var(--text); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.4vw, 18px);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.028);
}

.stat__label {
  font-size: 10.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--dim);
}

.stat__value {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-size: 25px;
  font-weight: 500;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stat__value b { font-weight: 500; }

.stat__value small {
  font-size: 11.5px;
  font-weight: 400;
  color: var(--muted);
}

.stat[data-tone="solar"] .stat__value b { color: var(--solar-dim); }
.stat[data-tone="load"] .stat__value b { color: var(--load-dim); }

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .dash { grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); }
}

@media (max-width: 900px) {
  .topbar { flex-wrap: wrap; row-gap: 12px; }
  .nav { order: 3; width: 100%; margin-left: 0; justify-content: center; }
  .clock { margin-left: auto; }

  .dash {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: none;
  }

  .hero,
  .power,
  .capacity { grid-column: 1; grid-row: auto; }

  .gauge { width: min(100%, 300px); }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  body { gap: 12px; }

  .brand__text { font-size: 11.5px; letter-spacing: 0.13em; }
  .clock { min-width: 0; }
  .clock__time { font-size: 21px; }
  .clock__date { font-size: 10px; }

  .card { border-radius: 18px; }

  .dial__readout { font-size: 30px; }

  .meter { height: 42px; }

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

  .card__head--wrap { gap: 14px; }

  .controls { width: 100%; justify-content: space-between; }

  .chart-wrap { min-height: 280px; height: 320px; }
}

@media (max-width: 400px) {
  .power { grid-template-columns: 1fr; }
  .facts { gap: 10px; }
}

/* -------------------------------------------------------------------------
   Motion preferences
   ------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}