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

:root {
  --bg:        #0d1117;
  --bg2:       #161b22;
  --bg3:       #1f2937;
  --border:    #30363d;
  --text:      #e6edf3;
  --text2:     #8b949e;
  --text3:     #6e7681;
  --solar:     #f59e0b;
  --solar-dim: rgba(245,158,11,.12);
  --green:     #10b981;
  --purple:    #8b5cf6;
  --cyan:      #06b6d4;
  --red:       #ef4444;
  --orange:    #f97316;
  --sidebar-w: 220px;
  --radius:    14px;
  --radius-sm: 9px;
  --shadow:    0 4px 28px rgba(0,0,0,.55);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 14px;
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0;
  z-index: 100; padding: 0 0 16px;
}
.sidebar-logo {
  display: flex; align-items: center; gap: 10px;
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 18px; font-weight: 700; letter-spacing: -.3px;
}
.logo-icon { font-size: 24px; }
.nav-list { list-style: none; padding: 12px 8px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  color: var(--text2); text-decoration: none;
  font-weight: 500; transition: background .15s, color .15s;
  cursor: pointer; margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: rgba(245,158,11,.12); color: var(--solar); }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.sidebar-status { display: flex; align-items: center; gap: 8px; padding: 0 20px; font-size: 12px; color: var(--text3); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text3); transition: background .3s; }
.status-dot.connected { background: var(--green); box-shadow: 0 0 8px var(--green); }
.status-dot.error { background: var(--red); }

/* ── Main ── */
.main { margin-left: var(--sidebar-w); flex: 1; padding: 28px 32px; max-width: 1280px; }
.view { display: none; }
.view.active { display: block; }
.view-title { font-size: 22px; font-weight: 700; margin-bottom: 20px; }
.dash-header { display: flex; align-items: baseline; gap: 12px; margin-bottom: 20px; }
.dash-header .view-title { margin-bottom: 0; }
.ts-badge { font-size: 12px; color: var(--text3); }

/* ── KPI Row ── */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.kpi {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px 14px;
  position: relative; overflow: hidden;
  transition: transform .15s, box-shadow .15s;
}
.kpi:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.kpi::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; }
.kpi-solar::before   { background: var(--solar); }
.kpi-home::before    { background: var(--green); }
.kpi-battery::before { background: var(--purple); }
.kpi-grid::before    { background: var(--cyan); }
.kpi-grid.grid-import::before { background: var(--red); }

.kpi-icon { font-size: 28px; margin-bottom: 6px; }
.kpi-label { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--text2); margin-bottom: 4px; }
.kpi-val { font-size: 30px; font-weight: 700; line-height: 1; }
.kpi-sub { font-size: 12px; color: var(--text2); margin-top: 8px; }

/* SOC bar inside battery KPI */
.soc-track { height: 4px; background: var(--bg3); border-radius: 2px; margin-top: 10px; }
.soc-bar { height: 4px; background: var(--purple); border-radius: 2px; transition: width .8s ease; }

/* ── Flow Diagram Card ── */
.flow-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.flow-card-title { font-weight: 600; font-size: 14px; color: var(--text2); margin-bottom: 14px; }
.flow-wrapper { width: 100%; }
.flow-svg { width: 100%; height: auto; display: block; }

/* ── SVG Node Styles ── */
.fnode-shadow { filter: drop-shadow(0 4px 12px rgba(0,0,0,.5)); }

.fn-icon  { font-size: 20px; text-anchor: middle; dominant-baseline: middle; }
.fn-label { font-size: 11px; text-anchor: middle; font-family: 'Segoe UI', system-ui, sans-serif; letter-spacing: .04em; text-transform: uppercase; }
.fn-val   { font-size: 16px; font-weight: 700; text-anchor: middle; font-family: 'Segoe UI', system-ui, sans-serif; }
.fn-val-hub  { font-size: 17px; }
.fn-val-home { font-size: 17px; }
.fn-val-sm   { font-size: 14px; }
.fn-sub   { font-size: 11px; text-anchor: middle; font-family: 'Segoe UI', system-ui, sans-serif; }

/* ── Flow Lines ── */
.flow-line {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  opacity: 0.25;
  transition: opacity .5s, stroke .5s;
}
.flow-line.fl-active {
  opacity: 1;
  animation: flowFwd 1s linear infinite;
  filter: url(#glow);
}
.flow-line.fl-reverse {
  opacity: 1;
  animation: flowRev 1s linear infinite;
  filter: url(#glow);
}
.flow-line.fl-idle { opacity: 0.1; animation: none; }

@keyframes flowFwd {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -34; }
}
@keyframes flowRev {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: 34; }
}

/* ── Chart cards ── */
.chart-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 20px;
}
.chart-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.chart-title { font-weight: 600; font-size: 14px; }
.chart-count { font-size: 12px; color: var(--text3); }
.chart-legend { font-size: 12px; color: var(--text2); display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.leg-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 4px; }

/* ── Detail cards ── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 14px; margin-bottom: 20px; }
.card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; position: relative; overflow: hidden; transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card::before { content:''; position:absolute; top:0;left:0;right:0; height:3px; background: var(--border); }
.card-pv::before      { background: var(--solar); }
.card-battery::before { background: var(--purple); }
.card-label { font-size: 11px; color: var(--text2); text-transform: uppercase; letter-spacing:.06em; margin-bottom:8px; }
.card-value { font-size: 32px; font-weight: 700; line-height:1; }
.card-unit  { font-size: 12px; color: var(--text3); margin-top: 2px; }
.card-sub   { font-size: 12px; color: var(--text2); margin-top: 8px; }

.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 14px; margin-bottom: 20px; }
.detail-section { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.detail-section h3 { margin-bottom: 12px; font-size: 14px; color: var(--text2); font-weight: 600; }
.detail-table { width: 100%; border-collapse: collapse; }
.detail-table td { padding: 7px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.detail-table tr:last-child td { border-bottom: none; }
.detail-table td:nth-child(2) { font-weight: 600; text-align: right; padding-right: 8px; }
.detail-table td:nth-child(3) { color: var(--text3); width: 40px; text-align: right; }

/* ── Toolbar ── */
.toolbar {
  display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
  margin-bottom: 18px; background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 18px;
}
.toolbar label { color: var(--text2); font-size: 13px; display: flex; align-items: center; gap: 8px; }
select, .inp, .inp-small {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 6px 10px; font-size: 13px; outline: none; transition: border-color .15s;
}
select:focus, .inp:focus, .inp-small:focus { border-color: var(--solar); }
.inp-small { width: 70px; }

/* ── Buttons ── */
.btn {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  padding: 7px 16px; border-radius: var(--radius-sm); cursor: pointer;
  font-size: 13px; font-weight: 500; transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--border); }
.btn-primary { background: var(--solar); border-color: var(--solar); color: #000; font-weight: 600; }
.btn-primary:hover { background: #d97706; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ── Fetch / Progress ── */
.fetch-card { margin-bottom: 20px; }
.fetch-card h3 { margin-bottom: 8px; }
.fetch-card p { color: var(--text2); margin-bottom: 12px; font-size: 13px; }
.fetch-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.fetch-row label { font-size: 13px; color: var(--text2); display: flex; align-items: center; gap: 8px; }
.fetch-progress { margin-top: 12px; font-size: 13px; color: var(--cyan); min-height: 18px; }
#fetch-result-pre {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 6px;
  padding: 12px; font-size: 12px; color: var(--green);
  white-space: pre-wrap; word-break: break-word; max-height: 200px; overflow-y: auto; margin-top: 8px;
}

/* ── DB Stats ── */
.stats-row {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; display: flex; gap: 28px; flex-wrap: wrap; font-size: 13px; color: var(--text2);
}
.stats-row strong { color: var(--text); }

/* ── Settings ── */
.settings-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 18px; }
.settings-card h3 { margin-bottom: 14px; font-size: 15px; font-weight: 600; }
.settings-form { border-top: 1px solid var(--border); margin-top: 14px; padding-top: 14px; }
.settings-form h4 { margin-bottom: 6px; font-size: 14px; }
.settings-hint { color: var(--text3); font-size: 12px; margin-bottom: 12px; }
.form-row { margin-bottom: 12px; }
.form-row label { display: block; color: var(--text2); font-size: 13px; margin-bottom: 6px; }
.inp { width: 100%; max-width: 340px; }
.form-msg { margin-top: 10px; font-size: 13px; min-height: 18px; }
.form-msg.ok  { color: var(--green); }
.form-msg.err { color: var(--red); }
.form-row-inline { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.form-row-inline label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text2); }
.btn-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }

/* ── Info box ── */
.info-box {
  background: rgba(6,182,212,.1); border: 1px solid rgba(6,182,212,.3);
  border-radius: var(--radius-sm); padding: 10px 16px; font-size: 13px; color: var(--cyan); margin-bottom: 18px;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .logo-text, .sidebar .nav-item span:last-child, .sidebar-status span { display: none; }
  .main { margin-left: 60px; padding: 16px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .kpi-row { grid-template-columns: 1fr 1fr; }
}