/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* ── Parallax brand ── */
  --anemone:     #8561F6;   /* primary accent */
  --galactic:    #491A86;   /* deep purple */
  --anemone-dim: rgba(133,97,246,0.15);

  /* ── Surfaces ── */
  --bg:          #0d0b18;
  --bg-card:     #131122;
  --bg-card-alt: #1a1730;
  --border:      #261f3e;

  /* ── Text (Parallax mono scale) ── */
  --text-1:      #f6f6f6;
  --text-2:      #a0a0a0;
  --text-3:      #616161;

  /* ── Data colours (functional — kept readable on dark bg) ── */
  --solar:       #f59e0b;
  --solar-dim:   rgba(245,158,11,0.15);
  --solar-glow:  rgba(245,158,11,0.5);
  --building:    var(--anemone);
  --building-dim:var(--anemone-dim);
  --export:      #34d399;
  --export-dim:  rgba(52,211,153,0.15);
  --import:      #f87171;
  --import-dim:  rgba(248,113,113,0.15);
  --forecast:    #67e8f9;

  --radius: 12px;
  --gap: 1.25rem;
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.site-icon {
  font-size: 1.4rem;
  color: var(--anemone);
  line-height: 1;
}

.site-name {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-1);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-2);
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-3);
  display: inline-block;
  transition: background 0.4s;
}

.live-dot.connected {
  background: var(--export);
  box-shadow: 0 0 6px var(--export);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ── Main layout ──────────────────────────────────────────────────────────── */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: calc(var(--gap) * 1.5);
  padding: var(--gap) 2rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ── Hero panel ───────────────────────────────────────────────────────────── */
.hero-panel {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.055);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

/* Anemone accent line along top edge */
.hero-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--anemone) 35%,
    var(--galactic) 65%,
    transparent 100%);
  opacity: 0.5;
  z-index: 1;
}

/* Three metric columns */
.hero-metrics {
  display: flex;
  align-items: stretch;
  padding: 2.25rem 0 2rem;
}

.metric-divider {
  width: 1px;
  background: rgba(255, 255, 255, 0.055);
  margin: 0.5rem 0;
  flex-shrink: 0;
}

.metric-col {
  flex: 1;
  padding: 0 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  position: relative;
}

.metric-building {
  align-items: center;
  text-align: center;
}

.metric-grid {
  align-items: flex-end;
  text-align: right;
}

/* Atmospheric glow behind the building column */
.metric-building::after {
  content: '';
  position: absolute;
  inset: -2rem -1rem;
  background: radial-gradient(ellipse at 50% 60%, rgba(133, 97, 246, 0.09) 0%, transparent 72%);
  pointer-events: none;
}

.metric-eyebrow {
  font-size: 0.65rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
}

.metric-number {
  font-size: 3.75rem;
  font-weight: 200;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-1);
  transition: color 0.4s;
}

.metric-unit {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-3);
  letter-spacing: 0.01em;
  vertical-align: 0.55em;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-2);
  margin-top: 0.15rem;
  transition: color 0.4s;
  letter-spacing: 0.01em;
}

/* Per-column accent colours */
.metric-solar .metric-number  { color: var(--solar); }
.metric-building .metric-number { color: var(--anemone); }

/* Grid states */
.metric-grid .metric-number              { color: var(--text-2); }
.metric-grid.exporting .metric-number   { color: var(--export); }
.metric-grid.importing .metric-number   { color: var(--import); }
.metric-grid.exporting .metric-label    { color: var(--export); opacity: 0.75; }
.metric-grid.importing .metric-label    { color: var(--import); opacity: 0.75; }

/* Flow track */
.flow-track {
  padding: 0 0 1.5rem;
}

#flow-svg {
  width: 100%;
  display: block;
  overflow: visible;
}

/* Flow line animations */
.flow-line {
  fill: none;
  opacity: 0;
  stroke-linecap: round;
  transition: opacity 0.5s;
}

.flow-line.active { opacity: 1; }

.flow-solar  { animation: flow-dash var(--speed, 1.2s) linear infinite; }
.flow-export { animation: flow-dash var(--speed, 1.2s) linear infinite; }
.flow-import { animation: flow-dash var(--speed, 1.2s) linear infinite; }

@keyframes flow-dash {
  to { stroke-dashoffset: -24; }
}


/* ── Today grid ───────────────────────────────────────────────────────────── */
.today-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

.today-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1rem;
  text-align: center;
}

.tc-value {
  font-size: 1.7rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.tc-sub {
  font-size: 0.7rem;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 0.3rem;
}

.solar-color    { color: var(--solar); }
.building-color { color: var(--building); }
.export-color   { color: var(--export); }
.import-color   { color: var(--import); }
.forecast-color { color: var(--forecast); }

/* ── Consumption breakdown ────────────────────────────────────────────────── */
.breakdown-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
}

.breakdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.breakdown-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-2);
}

.breakdown-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.breakdown-total {
  font-size: 0.8rem;
  color: var(--text-2);
  white-space: nowrap;
}

.breakdown-total strong {
  color: var(--text-1);
}

/* Period toggle buttons */
.period-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.period-btn {
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  letter-spacing: 0.03em;
}

.period-btn:last-child { border-right: none; }
.period-btn:hover { background: var(--bg-card-alt); color: var(--text-1); }
.period-btn.active { background: var(--anemone); color: #fff; font-weight: 600; }

.breakdown-loading {
  font-size: 0.85rem;
  color: var(--text-3);
  padding: 0.5rem 0;
}

.breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.bd-row {
  display: grid;
  grid-template-columns: minmax(0, 220px) 1fr auto;
  align-items: center;
  gap: 0.75rem;
}

.bd-label {
  font-size: 0.8rem;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bd-bar-track {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.bd-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 2px;
}

.bd-value {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-1);
  text-align: right;
  font-variant-numeric: tabular-nums;
  min-width: 60px;
}

.bd-other .bd-label { color: var(--text-3); }
.bd-other .bd-value { color: var(--text-3); }

/* ── Chart section ────────────────────────────────────────────────────────── */
.chart-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.chart-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab {
  flex: 0;
  padding: 0.8rem 1.5rem;
  background: none;
  border: none;
  color: var(--text-2);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.tab:hover { color: var(--text-1); }
.tab.active {
  color: var(--text-1);
  border-bottom-color: var(--anemone);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.chart-legend {
  display: flex;
  gap: 1.5rem;
  padding: 0.8rem 1.5rem 0;
  flex-wrap: wrap;
}

.chart-legend span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.chart-legend span::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 3px;
  border-radius: 2px;
}

.legend-solar::before    { background: var(--solar); }
.legend-building::before { background: var(--building); }
.legend-grid-e::before   { background: var(--export); }
.legend-grid-i::before   { background: var(--import); }
.legend-grid::before     { background: linear-gradient(90deg, var(--export) 50%, var(--import) 50%); }

.chart-container {
  position: relative;
  padding: 0.75rem 1rem 0.5rem;
  height: 280px;
}

#chart-month-container {
  height: 360px;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  font-size: 0.9rem;
  background: var(--bg-card);
}

.chart-loading.hidden { display: none; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.72rem;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  main { padding: 1rem; }

  .hero-metrics { flex-direction: column; padding: 1.5rem 0 1.25rem; }
  .metric-col { padding: 0.75rem 1.5rem; }
  .metric-divider { width: auto; height: 1px; margin: 0 1.5rem; }
  .metric-number { font-size: 2.75rem; }
  .flow-track { display: none; }

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

@media (max-width: 540px) {
  header { padding: 0.8rem 1rem; }
  .today-grid { grid-template-columns: 1fr 1fr; }
  .metric-number { font-size: 2.25rem; }
}

/* ── Tooltip (chart hover) ────────────────────────────────────────────────── */
#chart-tooltip {
  position: fixed;
  background: var(--bg-card-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font-size: 0.78rem;
  pointer-events: none;
  z-index: 100;
  display: none;
  white-space: nowrap;
  line-height: 1.7;
}