:root {
  color-scheme: light;
  --bg: #eef3f7;
  --panel: #ffffff;
  --text: #17212b;
  --muted: #6d7885;
  --line: #d9e1e8;
  --blue: #2563eb;
  --green: #168a4a;
  --red: #c0392b;
  --amber: #b7791f;
  --shadow: 0 16px 40px rgba(31, 46, 61, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input {
  font: inherit;
}

.hidden {
  display: none !important;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

.login-panel h1 {
  font-size: 26px;
  margin-bottom: 24px;
}

label {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 14px;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  color: var(--text);
  background: #fff;
}

button {
  border: 0;
  border-radius: 6px;
  background: var(--blue);
  color: white;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 700;
}

.ghost-button {
  border: 1px solid var(--line);
  color: var(--text);
  background: #fff;
}

.modal-open {
  overflow: hidden;
}

.form-error {
  min-height: 20px;
  color: var(--red);
  font-size: 14px;
}

.app-shell {
  width: min(1240px, 100%);
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.topbar h1 {
  font-size: clamp(24px, 3vw, 34px);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  border-radius: 999px;
  padding: 0 14px;
  background: #edf2f7;
  color: var(--muted);
  font-weight: 700;
  white-space: nowrap;
}

.badge.ok {
  background: #daf5e4;
  color: var(--green);
}

.badge.bad {
  background: #ffe4df;
  color: var(--red);
}

.summary-grid,
.content-grid,
.phase-grid,
.charger-grid,
.mcb-grid {
  display: grid;
  gap: 14px;
}

.summary-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 14px;
}

.gauge-card,
.panel,
.mcb-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(31, 46, 61, 0.06);
}

.gauge-card {
  display: grid;
  place-items: center;
  gap: 12px;
  padding: 18px 14px;
  min-height: 190px;
  text-align: center;
}

.chart-trigger {
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.chart-trigger:hover,
.chart-trigger:focus-visible {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 12px 28px rgba(31, 46, 61, 0.12);
  outline: none;
  transform: translateY(-1px);
}

.gauge-card > span,
.charger-grid span,
.subtle {
  color: var(--muted);
  font-size: 13px;
}

.gauge {
  --value: 0;
  --gauge-color: var(--blue);
  width: 124px;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, #fff 0 58%, transparent 59%),
    conic-gradient(var(--gauge-color) calc(var(--value) * 1%), #edf2f7 0);
}

.gauge.reserve {
  --gauge-color: var(--green);
}

.gauge.charger {
  --gauge-color: #7c3aed;
}

.gauge > div {
  width: 82px;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  align-content: center;
  background: #fff;
  box-shadow: inset 0 0 0 1px var(--line);
}

.gauge strong {
  display: block;
  font-size: 25px;
  line-height: 1;
}

.gauge small {
  color: var(--muted);
  font-size: 12px;
}

.content-grid {
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.8fr);
}

.panel {
  padding: 18px;
}

.panel.wide {
  min-width: 0;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.panel-head h2 {
  font-size: 18px;
}

.phase-gauge-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.phase-gauge-card {
  display: grid;
  place-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 10px;
  text-align: center;
}

.phase-gauge {
  width: 136px;
}

.phase-gauge strong {
  color: var(--blue);
}

.phase-gauge-card > span {
  color: var(--muted);
  font-size: 13px;
}

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

.charger-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.charger-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 18px;
  word-break: break-word;
}

.mcb-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.mcb-card {
  padding: 14px;
}

.mcb-card.on {
  border-color: rgba(22, 138, 74, 0.45);
}

.mcb-card.off {
  border-color: rgba(192, 57, 43, 0.35);
}

.mcb-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.mcb-switch {
  width: 54px;
  height: 30px;
  border-radius: 999px;
  background: var(--red);
  padding: 3px;
  transition: background 160ms ease;
}

.mcb-switch span {
  display: block;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: transform 160ms ease;
}

.mcb-card.on .mcb-switch {
  background: var(--green);
}

.mcb-card.on .mcb-switch span {
  transform: translateX(24px);
}

.mcb-state-text {
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 800;
  color: var(--red);
}

.mcb-card.on .mcb-state-text {
  color: var(--green);
}

.mcb-meta {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
}

.status-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.status-list div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.status-list dt {
  color: var(--muted);
}

.status-list dd {
  margin: 0;
  font-weight: 700;
  word-break: break-word;
}

.chart-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(23, 33, 43, 0.48);
}

.chart-dialog {
  width: min(900px, 100%);
  max-height: min(720px, calc(100vh - 40px));
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 18px;
}

.chart-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.chart-head h2 {
  font-size: 20px;
}

.chart-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.chart-controls button {
  min-width: 56px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.chart-controls button.active {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.chart-body {
  min-height: 340px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfdff;
}

.chart-state {
  min-height: 314px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-weight: 700;
  text-align: center;
}

.chart-state.error {
  color: var(--red);
}

.line-chart {
  display: block;
  width: 100%;
  min-height: 314px;
}

.line-chart .grid line {
  stroke: var(--line);
  stroke-width: 1;
}

.line-chart .grid text,
.line-chart .axis-labels text,
.line-chart .legend text {
  fill: var(--muted);
  font-size: 13px;
}

.line-chart .area {
  fill: rgba(37, 99, 235, 0.12);
}

.line-chart .line {
  fill: none;
  stroke: var(--blue);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.line-chart .dots circle {
  fill: #fff;
  stroke: var(--blue);
  stroke-width: 2;
}

.line-chart .hit-dot {
  fill: transparent;
  cursor: crosshair;
  pointer-events: all;
}

.chart-tooltip {
  position: fixed;
  z-index: 40;
  display: grid;
  gap: 4px;
  min-width: 128px;
  padding: 9px 10px;
  border: 1px solid rgba(23, 33, 43, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
  box-shadow: 0 10px 26px rgba(23, 33, 43, 0.18);
  pointer-events: none;
}

.chart-tooltip span {
  color: var(--muted);
  font-size: 12px;
}

.chart-tooltip b {
  font-size: 14px;
}

.chart-tooltip-row {
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: baseline;
  gap: 10px;
}

.chart-tooltip-row.single {
  grid-template-columns: 1fr;
}

.chart-tooltip-row strong {
  font-size: 13px;
}

.chart-tooltip-row b {
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 920px) {
  .summary-grid,
  .content-grid,
  .mcb-grid {
    grid-template-columns: 1fr 1fr;
  }

  .content-grid .wide {
    grid-column: 1 / -1;
  }

  .phase-gauge {
    width: min(120px, 100%);
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: 16px;
  }

  .topbar,
  .phase-values {
    flex-direction: column;
    align-items: flex-start;
  }

  .summary-grid,
  .content-grid,
  .phase-gauge-grid,
  .charger-grid,
  .mcb-grid {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 14px;
  }

  .panel-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .phase-gauge-card {
    grid-template-columns: auto 1fr;
    justify-items: start;
    min-height: 116px;
    padding: 14px;
    text-align: left;
  }

  .phase-gauge {
    width: 96px;
  }

  .phase-gauge > div {
    width: 64px;
  }

  .phase-gauge strong {
    font-size: 22px;
  }

  .phase-gauge-card > span {
    align-self: center;
    font-size: 14px;
  }

  .gauge-card {
    min-height: 172px;
  }

  .chart-modal {
    padding: 12px;
  }

  .chart-dialog {
    max-height: calc(100vh - 24px);
    padding: 14px;
  }

  .chart-head {
    align-items: stretch;
    flex-direction: column;
  }
}