:root {
  color-scheme: dark;
  --bg: #08110f;
  --surface: #0d1916;
  --surface-2: #12231e;
  --surface-3: #172a24;
  --border: #294038;
  --border-soft: #1c312a;
  --text: #f2f8f4;
  --muted: #9cb2a9;
  --green: #73dd8a;
  --green-deep: #173c27;
  --blue: #61b9ff;
  --amber: #f0bd62;
  --red: #ff806d;
  --purple: #c49afa;
  --cyan: #8ce1d5;
  --focus: #d5ff78;
  --radius: 14px;
  font-family: Inter, Aptos, "Segoe UI", Arial, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

button, select, input { font: inherit; }

button, a, select, input { -webkit-tap-highlight-color: transparent; }

a { color: inherit; }

button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(8, 17, 15, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.brand-mark { width: 34px; color: var(--green); }

.brand-copy { display: grid; line-height: 1.08; }

.brand-copy strong { letter-spacing: 0.05em; }

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.header-actions { display: flex; align-items: center; gap: 18px; }

.lab-badge,
.scenario-state,
.operating-label,
.calculation-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.lab-badge > span,
.scenario-state > span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(115, 221, 138, 0.11);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover { transform: translateY(-2px); }

.button-primary { background: var(--green); color: #07110b; }
.button-primary:hover { background: #8bea9d; }
.button-compact { min-height: 40px; padding: 0 16px; font-size: 0.82rem; }

main { overflow: hidden; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.7fr);
  gap: 6vw;
  align-items: end;
  max-width: 1500px;
  margin: 0 auto;
  padding: 92px 5vw 66px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(2.5rem, 5.2vw, 5.3rem);
  line-height: 1.01;
  letter-spacing: -0.055em;
}

.hero h1 span { color: var(--green); }

.hero-text {
  max-width: 720px;
  margin: 28px 0 0;
  color: #bdcdc6;
  font-size: clamp(1rem, 1.4vw, 1.25rem);
}

.hero-proof {
  display: grid;
  border-top: 1px solid var(--border);
}

.hero-proof div {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: baseline;
  padding: 17px 0;
  border-bottom: 1px solid var(--border);
}

.hero-proof strong { color: var(--green); font-size: 1.5rem; }
.hero-proof span { color: var(--muted); font-size: 0.9rem; }

.simulator-shell {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 0;
  max-width: 1500px;
  margin: 0 auto 80px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.control-panel {
  padding: 28px;
  border-right: 1px solid var(--border);
  background: #0a1512;
}

.panel-heading,
.dashboard-topline,
.card-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.panel-heading { margin-bottom: 26px; }

.panel-heading h2,
.dashboard-topline h2,
.card-heading h3,
.value-section h2 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.panel-heading h2 { font-size: 1.35rem; }

.icon-button {
  display: grid;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.icon-button:hover { color: var(--text); border-color: #466157; }
.icon-button svg { width: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.field-label,
.range-heading label,
.strategy-fieldset legend {
  display: block;
  margin: 19px 0 8px;
  color: #b8cac2;
  font-size: 0.78rem;
  font-weight: 750;
}

select {
  width: 100%;
  min-height: 44px;
  padding: 0 36px 0 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
}

.strategy-fieldset {
  display: grid;
  gap: 7px;
  margin: 4px 0 0;
  padding: 0;
  border: 0;
}

.strategy-option {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  padding: 11px;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
}

.strategy-option:has(input:checked) { border-color: var(--green); background: var(--green-deep); }
.strategy-option input { margin: 3px 0 0; accent-color: var(--green); }
.strategy-option span { display: grid; }
.strategy-option strong { font-size: 0.84rem; }
.strategy-option small { color: var(--muted); font-size: 0.71rem; line-height: 1.4; }

.range-field { margin-top: 20px; }

.range-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.range-heading label { margin: 0; }
.range-heading output { color: var(--green); font-size: 0.79rem; font-weight: 800; }

input[type="range"] {
  width: 100%;
  height: 26px;
  margin: 8px 0 0;
  background: transparent;
  accent-color: var(--green);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: #345046; }
input[type="range"]::-webkit-slider-thumb { width: 17px; height: 17px; margin-top: -6px; border: 3px solid var(--surface); border-radius: 50%; background: var(--green); -webkit-appearance: none; }
input[type="range"]::-moz-range-track { height: 4px; border-radius: 4px; background: #345046; }
input[type="range"]::-moz-range-thumb { width: 13px; height: 13px; border: 3px solid var(--surface); border-radius: 50%; background: var(--green); }

.range-scale { display: flex; justify-content: space-between; color: #668077; font-size: 0.65rem; }

.advanced-controls {
  margin-top: 22px;
  padding-top: 17px;
  border-top: 1px solid var(--border-soft);
}

.advanced-controls summary { color: var(--muted); font-size: 0.79rem; font-weight: 750; cursor: pointer; }
.control-note { margin: 14px 0 0; color: #6f887e; font-size: 0.68rem; }
.is-hidden { display: none !important; }

.dashboard-panel { min-width: 0; padding: 30px; }

.dashboard-topline { align-items: center; margin-bottom: 22px; }
.dashboard-topline h2 { font-size: 1.6rem; }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
}

.kpi-card {
  position: relative;
  min-width: 0;
  padding: 20px 22px;
  border-right: 1px solid var(--border);
  background: var(--surface-2);
}

.kpi-card:last-child { border-right: 0; }
.kpi-card::before { position: absolute; top: 0; right: 22px; left: 22px; height: 2px; content: ""; background: var(--green); }
.kpi-blue::before { background: var(--blue); }
.kpi-amber::before { background: var(--amber); }
.kpi-label { display: block; color: var(--muted); font-size: 0.75rem; font-weight: 750; }
.kpi-card strong { display: block; margin: 8px 0 2px; font-size: clamp(1.55rem, 2.4vw, 2.25rem); line-height: 1; }
.kpi-green strong { color: var(--green); }
.kpi-blue strong { color: var(--blue); }
.kpi-amber strong { color: var(--amber); }
.kpi-card small { color: #779087; font-size: 0.69rem; }

.visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(260px, 0.75fr);
  gap: 14px;
  margin-top: 14px;
}

.power-flow-card,
.battery-card,
.chart-card,
.comparison-card {
  min-width: 0;
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.power-flow-card,
.battery-card { padding: 22px; }
.card-heading h3 { font-size: 1.06rem; }
.operating-label { color: var(--green); text-align: right; }

.power-flow {
  position: relative;
  max-width: 660px;
  height: 360px;
  margin: 6px auto 0;
}

.flow-connections { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.flow-line { fill: none; opacity: 0.13; stroke-linecap: round; stroke-dasharray: 9 8; transition: opacity 180ms ease, stroke-width 180ms ease; }
.flow-line.is-active { opacity: 0.9; animation: flow 1.1s linear infinite; }
.pv-line { stroke: var(--green); }
.grid-line { stroke: var(--red); }
.battery-line { stroke: var(--blue); }
.curtail-line { stroke: var(--purple); }

@keyframes flow { to { stroke-dashoffset: -34; } }

.flow-node {
  position: absolute;
  display: grid;
  width: 126px;
  min-height: 86px;
  align-content: center;
  justify-items: center;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: #10201b;
  text-align: center;
}

.flow-node small { color: var(--muted); font-size: 0.68rem; }
.flow-node strong { margin-top: 1px; font-size: 1rem; }
.flow-node em { color: var(--blue); font-size: 0.63rem; font-style: normal; }
.node-icon { display: grid; width: 25px; height: 25px; place-items: center; margin-bottom: 3px; color: var(--muted); font-size: 1.25rem; font-weight: 700; }
.sun-icon { color: var(--green); }
.node-pv { top: 22px; left: 2px; border-color: #31573d; }
.node-grid { top: 22px; right: 2px; border-color: #553b36; }
.node-battery { bottom: 0; left: 2px; border-color: #31536b; }
.node-curtail { right: 2px; bottom: 0; border-color: #4c3c61; }
.node-central {
  top: 131px;
  left: calc(50% - 70px);
  width: 140px;
  min-height: 105px;
  border: 2px solid var(--green);
  background: #152a22;
}

.battery-icon {
  position: relative;
  overflow: hidden;
  width: 18px;
  height: 27px;
  border: 2px solid var(--blue);
  border-radius: 3px;
}

.battery-icon::before { position: absolute; top: -5px; width: 8px; height: 4px; border-radius: 2px 2px 0 0; background: var(--blue); content: ""; }
.battery-icon i { position: absolute; right: 2px; bottom: 2px; left: 2px; min-height: 3px; background: var(--blue); transition: height 200ms ease; }

.battery-card { display: flex; flex-direction: column; }
.battery-card .card-heading strong { color: var(--blue); font-size: 1.8rem; }

.battery-gauge {
  position: relative;
  height: 24px;
  margin: 34px 0 30px;
  border: 1px solid #31536b;
  background: #0a151a;
}

.battery-gauge > div:first-child { width: 0; height: 100%; background: var(--blue); transition: width 200ms ease; }
.gauge-limit { position: absolute; top: -5px; width: 1px; height: 32px; background: #5f7783; }
.gauge-limit span { position: absolute; top: 34px; transform: translateX(-50%); color: var(--muted); font-size: 0.6rem; }
.gauge-min { left: 0; }
.gauge-max { right: 0; }

.battery-facts { display: grid; margin: 0; }
.battery-facts div { display: flex; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border-soft); }
.battery-facts dt { color: var(--muted); font-size: 0.72rem; }
.battery-facts dd { margin: 0; font-size: 0.78rem; font-weight: 800; }
.battery-story { margin: auto 0 0; padding: 16px 0 0; color: #a8bbb3; font-size: 0.78rem; line-height: 1.55; }

.chart-card { margin-top: 14px; padding: 22px 22px 18px; }
.chart-heading { align-items: center; }
.playback-controls { display: flex; align-items: center; gap: 12px; }
.play-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--green);
  border-radius: 7px;
  background: transparent;
  color: var(--green);
  font-size: 0.73rem;
  font-weight: 800;
  cursor: pointer;
}
.play-button:hover, .play-button.is-playing { background: var(--green-deep); }
.play-button svg { width: 16px; fill: currentColor; }
.speed-control { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 0.7rem; }
.speed-control select { width: 61px; min-height: 36px; padding-left: 8px; }

.chart-legend { display: flex; flex-wrap: wrap; gap: 8px 15px; margin: 20px 0 8px; }
.chart-legend button { display: inline-flex; align-items: center; gap: 6px; padding: 3px 0; border: 0; background: transparent; color: var(--muted); font-size: 0.69rem; cursor: pointer; }
.chart-legend button.is-muted { opacity: 0.35; text-decoration: line-through; }
.legend-swatch { width: 17px; height: 3px; background: var(--green); }
.swatch-load { background: var(--cyan); }
.swatch-charge { background: var(--blue); border-top: 1px dashed var(--surface); }
.swatch-discharge { background: #d8ecff; }
.swatch-curtail { background: var(--purple); }
.swatch-grid { background: var(--red); }

.chart-wrap { width: 100%; overflow: hidden; cursor: crosshair; touch-action: none; }
#power-chart { display: block; width: 100%; min-width: 720px; overflow: visible; }
.grid-line { stroke: #254139; stroke-width: 1; }
.grid-line.vertical { stroke-dasharray: 3 7; }
.axis-label, .axis-unit { fill: #6f887e; font-size: 11px; }
.chart-area { fill: rgba(115, 221, 138, 0.06); stroke: none; }
.chart-area.is-hidden { display: none; }
.chart-line { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.series-pv { stroke: var(--green); stroke-width: 2.4; }
.series-load { stroke: var(--cyan); }
.series-charge { stroke: var(--blue); stroke-dasharray: 7 5; }
.series-discharge { stroke: #d8ecff; stroke-dasharray: 2 4; }
.series-curtail { stroke: var(--purple); stroke-width: 1.7; }
.series-grid { stroke: var(--red); stroke-width: 1.7; }
.time-cursor { stroke: #edf8f1; stroke-width: 1; stroke-dasharray: 3 5; opacity: 0.72; }
.cursor-dot { fill: var(--green); stroke: var(--surface); stroke-width: 3; }
.timeline-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.time-range { margin-top: -2px !important; }

.chart-readout {
  display: grid;
  grid-template-columns: repeat(6, minmax(70px, 1fr));
  margin-top: 9px;
  border-top: 1px solid var(--border-soft);
}
.chart-readout span { display: grid; padding: 10px 8px 0; border-right: 1px solid var(--border-soft); text-align: center; }
.chart-readout span:last-child { border-right: 0; }
.chart-readout strong { font-size: 0.8rem; }
.chart-readout small { color: var(--muted); font-size: 0.62rem; }

.comparison-card { margin-top: 14px; padding: 22px; }
.calculation-badge { padding: 5px 9px; border: 1px solid var(--border); border-radius: 99px; }
.comparison-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 22px; }
.comparison-label { display: flex; justify-content: space-between; gap: 10px; color: var(--muted); font-size: 0.71rem; }
.comparison-label strong { color: var(--text); }
.bar-pair { display: grid; gap: 5px; margin-top: 12px; }
.bar-pair i { display: block; height: 7px; min-width: 1px; transition: width 240ms ease; }
.bar-before { background: #465d54; }
.bar-after { background: var(--green); }

.value-section {
  display: grid;
  grid-template-columns: 0.75fr 1.7fr;
  gap: 6vw;
  max-width: 1500px;
  margin: 0 auto;
  padding: 70px 5vw 90px;
  border-top: 1px solid var(--border);
}
.value-section h2 { max-width: 420px; font-size: clamp(2rem, 3.4vw, 3.8rem); }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); }
.value-grid article { min-height: 240px; padding: 26px; background: var(--surface); }
.value-grid article > span { color: var(--green); font-size: 0.71rem; font-weight: 850; }
.value-grid h3 { margin: 48px 0 10px; font-size: 1.35rem; }
.value-grid p { margin: 0; color: var(--muted); font-size: 0.86rem; }
.value-cta { grid-column: 2; justify-self: start; margin-top: -24px; }

footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 40px;
  align-items: center;
  padding: 30px 5vw;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.7rem;
}
.footer-brand { display: flex; align-items: baseline; gap: 7px; color: var(--text); }
.footer-brand strong { color: var(--green); letter-spacing: 0.05em; }
footer p { margin: 0; text-align: center; }

noscript { display: block; padding: 20px; background: var(--red); color: #17100f; text-align: center; }

body[data-operating-state="charging"] #state-dot { background: var(--green); }
body[data-operating-state="discharging"] #state-dot { background: var(--blue); }
body[data-operating-state="curtailing"] #state-dot { background: var(--purple); }
body[data-operating-state="grid"] #state-dot { background: var(--red); }

@media (max-width: 1180px) {
  .simulator-shell { margin-right: 2vw; margin-left: 2vw; }
  .visual-grid { grid-template-columns: 1fr; }
  .battery-card { min-height: 290px; }
  .comparison-grid { grid-template-columns: 1fr; }
  .value-section { grid-template-columns: 1fr; }
  .value-cta { grid-column: 1; margin-top: 0; }
}

@media (max-width: 900px) {
  .site-header { padding: 0 20px; }
  .lab-badge { display: none; }
  .hero { grid-template-columns: 1fr; padding: 68px 24px 48px; }
  .hero-proof { grid-template-columns: repeat(3, 1fr); }
  .hero-proof div { grid-template-columns: 1fr; gap: 2px; }
  .simulator-shell { grid-template-columns: 1fr; margin: 0 14px 60px; }
  .control-panel { border-right: 0; border-bottom: 1px solid var(--border); }
  .kpi-grid { grid-template-columns: 1fr; }
  .kpi-card { border-right: 0; border-bottom: 1px solid var(--border); }
  .kpi-card:last-child { border-bottom: 0; }
  .value-grid { grid-template-columns: 1fr; }
  .value-grid article { min-height: 190px; }
  .value-grid h3 { margin-top: 26px; }
  footer { grid-template-columns: 1fr; gap: 10px; text-align: center; }
}

@media (max-width: 620px) {
  .header-actions .button { display: none; }
  .hero h1 { font-size: 2.5rem; }
  .hero-proof { grid-template-columns: 1fr; }
  .hero-proof div { grid-template-columns: 90px 1fr; }
  .dashboard-panel { padding: 16px; }
  .dashboard-topline { align-items: flex-start; }
  .scenario-state { max-width: 120px; justify-content: flex-end; text-align: right; }
  .power-flow-card, .battery-card, .chart-card, .comparison-card { padding: 16px; }
  .power-flow { height: 330px; transform: scale(0.92); transform-origin: center top; margin-bottom: -26px; }
  .flow-node { width: 104px; min-height: 78px; }
  .node-central { left: calc(50% - 58px); width: 116px; }
  .flow-connections { transform: scaleX(0.9); transform-origin: center; }
  .chart-heading { display: grid; }
  .playback-controls { margin-top: 8px; }
  .chart-wrap { overflow-x: auto; }
  .chart-readout { grid-template-columns: repeat(3, 1fr); }
  .chart-readout span:nth-child(3) { border-right: 0; }
  .comparison-label { align-items: flex-start; }
  .value-section { padding: 54px 24px 70px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}