@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;700;900&family=Exo+2:ital,wght@0,300;0,400;0,500;0,600;1,300&family=Share+Tech+Mono&display=swap');

/* ===========================
   ROOT VARIABLES
=========================== */
:root {
  --bg-base:        #060a14;
  --bg-surface:     #0c1220;
  --bg-card:        #0f1929;
  --bg-card-hover:  #131f30;

  --solar:          #f59e0b;
  --solar-light:    #fcd34d;
  --solar-glow:     rgba(245,158,11,0.35);
  --solar-dim:      rgba(245,158,11,0.12);

  --grid-c:         #3b82f6;
  --grid-glow:      rgba(59,130,246,0.3);
  --grid-dim:       rgba(59,130,246,0.1);

  --battery-c:      #10b981;
  --battery-glow:   rgba(16,185,129,0.3);
  --battery-dim:    rgba(16,185,129,0.1);

  --export-c:       #a78bfa;
  --export-glow:    rgba(167,139,250,0.3);
  --export-dim:     rgba(167,139,250,0.1);

  --danger:         #ef4444;
  --warning:        #f59e0b;
  --success:        #10b981;

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;

  --border:         rgba(148,163,184,0.08);
  --border-bright:  rgba(148,163,184,0.18);

  --font-display:   'Orbitron', monospace;
  --font-body:      'Exo 2', sans-serif;
  --font-mono:      'Share Tech Mono', monospace;

  --nav-h:          64px;
  --r:              12px;
  --r-lg:           20px;
  --r-xl:           28px;
}

/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Dot-grid background */
body::before {
  content:'';
  position:fixed;
  inset:0;
  background-image: radial-gradient(circle, rgba(148,163,184,0.15) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events:none;
  z-index:0;
}

/* Subtle radial glow at top */
body::after {
  content:'';
  position:fixed;
  top:-200px;
  left:50%;
  transform:translateX(-50%);
  width:900px;
  height:600px;
  background: radial-gradient(ellipse, rgba(245,158,11,0.06) 0%, transparent 70%);
  pointer-events:none;
  z-index:0;
}

/* ===========================
   SCROLLBAR
=========================== */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:var(--bg-base); }
::-webkit-scrollbar-thumb { background:var(--border-bright); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:var(--text-muted); }

/* ===========================
   NAVBAR
=========================== */
.navbar {
  position:fixed;
  top:0; left:0; right:0;
  height:var(--nav-h);
  z-index:100;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 32px;
  background: rgba(6,10,20,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom:1px solid var(--border);
}

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

.nav-brand .brand-icon {
  width:36px;height:36px;
  background: var(--solar-dim);
  border:1px solid var(--solar-glow);
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;
  animation: pulse-solar 3s ease-in-out infinite;
}

.nav-brand .brand-name {
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--text-primary);
}

.nav-brand .brand-sub {
  font-family:var(--font-body);
  font-size:11px;
  color:var(--text-muted);
  letter-spacing:1px;
}

.nav-links {
  display:flex;
  gap:8px;
  list-style:none;
}

.nav-links a {
  text-decoration:none;
  color:var(--text-secondary);
  font-size:13px;
  font-weight:500;
  letter-spacing:1px;
  text-transform:uppercase;
  padding:8px 16px;
  border-radius:8px;
  transition: all 0.2s;
  border:1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color:var(--solar);
  background:var(--solar-dim);
  border-color:var(--solar-glow);
}

.nav-badge {
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--battery-c);
  font-family:var(--font-mono);
  background:var(--battery-dim);
  border:1px solid var(--battery-glow);
  padding:6px 12px;
  border-radius:20px;
}

.nav-badge .dot {
  width:6px;height:6px;
  border-radius:50%;
  background:var(--battery-c);
  animation:pulse-dot 2s ease-in-out infinite;
}

/* ===========================
   MAIN LAYOUT
=========================== */
main {
  position:relative;
  z-index:1;
  padding-top: var(--nav-h);
}

.section {
  padding:80px 32px;
  max-width:1280px;
  margin:0 auto;
}

.section-sm {
  padding:48px 32px;
  max-width:1280px;
  margin:0 auto;
}

/* ===========================
   HERO
=========================== */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:60px 32px;
  text-align:center;
  position:relative;
  overflow:hidden;
}

.hero-label {
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:4px;
  text-transform:uppercase;
  color:var(--solar);
  margin-bottom:20px;
  opacity:0;
  animation: fade-up 0.8s ease forwards 0.2s;
}

.hero-title {
  font-family:var(--font-display);
  font-size:clamp(32px,5vw,64px);
  font-weight:900;
  line-height:1.1;
  margin-bottom:16px;
  opacity:0;
  animation: fade-up 0.8s ease forwards 0.4s;
}

.hero-title .accent { color:var(--solar); }

.hero-sub {
  font-size:18px;
  color:var(--text-secondary);
  font-weight:300;
  margin-bottom:48px;
  max-width:500px;
  opacity:0;
  animation: fade-up 0.8s ease forwards 0.6s;
}

.hero-stats {
  display:flex;
  gap:32px;
  justify-content:center;
  flex-wrap:wrap;
  margin-bottom:60px;
  opacity:0;
  animation: fade-up 0.8s ease forwards 0.8s;
}

.hero-stat {
  text-align:center;
}

.hero-stat .val {
  font-family:var(--font-display);
  font-size:36px;
  font-weight:700;
  color:var(--solar);
  display:block;
  line-height:1;
}

.hero-stat .lbl {
  font-size:12px;
  color:var(--text-muted);
  letter-spacing:1px;
  text-transform:uppercase;
  margin-top:4px;
}

.hero-divider {
  width:1px;
  height:40px;
  background:var(--border-bright);
  align-self:center;
}

/* ===========================
   ENERGY FLOW DIAGRAM
=========================== */
.flow-container {
  width:100%;
  max-width:900px;
  margin:0 auto;
  opacity:0;
  animation: fade-up 0.8s ease forwards 1.0s;
}

.flow-svg {
  width:100%;
  height:auto;
}

/* SVG flow path animations */
@keyframes flow-dash {
  to { stroke-dashoffset: -24; }
}

.flow-line {
  stroke-dasharray: 8 4;
  animation: flow-dash 1.2s linear infinite;
}

.flow-line-slow {
  stroke-dasharray: 8 4;
  animation: flow-dash 2s linear infinite;
}

.flow-line-reverse {
  stroke-dasharray: 8 4;
  animation: flow-dash 1.5s linear infinite reverse;
}

/* ===========================
   STAT CARDS
=========================== */
.cards-grid {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px,1fr));
  gap:20px;
  margin-bottom:40px;
}

.card {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:28px;
  position:relative;
  overflow:hidden;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  border-color:var(--border-bright);
  transform:translateY(-3px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.card::before {
  content:'';
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:var(--card-accent, var(--solar));
  opacity:0.8;
}

.card.solar   { --card-accent: var(--solar); }
.card.grid    { --card-accent: var(--grid-c); }
.card.battery { --card-accent: var(--battery-c); }
.card.export  { --card-accent: var(--export-c); }

.card-icon {
  width:44px;height:44px;
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;
  margin-bottom:16px;
  background:var(--card-icon-bg, var(--solar-dim));
  border:1px solid var(--card-icon-border, var(--solar-glow));
}

.card.solar   .card-icon { --card-icon-bg:var(--solar-dim);   --card-icon-border:var(--solar-glow); }
.card.grid    .card-icon { --card-icon-bg:var(--grid-dim);    --card-icon-border:var(--grid-glow); }
.card.battery .card-icon { --card-icon-bg:var(--battery-dim); --card-icon-border:var(--battery-glow); }
.card.export  .card-icon { --card-icon-bg:var(--export-dim);  --card-icon-border:var(--export-glow); }

.card-label {
  font-size:12px;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:8px;
}

.card-value {
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  line-height:1;
  color:var(--text-primary);
  margin-bottom:8px;
}

.card-value .unit {
  font-size:14px;
  font-weight:400;
  color:var(--text-secondary);
  margin-left:4px;
}

.card-sub {
  font-size:13px;
  color:var(--text-secondary);
}

.card-trend {
  position:absolute;
  top:24px;right:24px;
  font-size:12px;
  font-family:var(--font-mono);
  padding:4px 8px;
  border-radius:6px;
}

.card-trend.up {
  color:var(--battery-c);
  background:var(--battery-dim);
}

.card-trend.down {
  color:var(--danger);
  background:rgba(239,68,68,0.1);
}

/* ===========================
   CHART CONTAINERS
=========================== */
.chart-card {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:32px;
  margin-bottom:24px;
}

.chart-card-header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:28px;
  flex-wrap:wrap;
  gap:12px;
}

.chart-title {
  font-family:var(--font-display);
  font-size:16px;
  font-weight:500;
  letter-spacing:1px;
  text-transform:uppercase;
}

.chart-legend {
  display:flex;
  gap:20px;
  flex-wrap:wrap;
}

.legend-item {
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--text-secondary);
}

.legend-dot {
  width:8px;height:8px;
  border-radius:50%;
}

.chart-wrap {
  position:relative;
  height:280px;
}

/* ===========================
   SECTION HEADERS
=========================== */
.section-header {
  margin-bottom:40px;
}

.section-tag {
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:3px;
  text-transform:uppercase;
  color:var(--solar);
  margin-bottom:12px;
  display:block;
}

.section-title {
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  letter-spacing:1px;
}

.section-title span { color:var(--solar); }

.section-desc {
  font-size:15px;
  color:var(--text-secondary);
  margin-top:12px;
  max-width:600px;
}

/* ===========================
   SYSTEM SPEC TABLE
=========================== */
.spec-grid {
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(300px,1fr));
  gap:16px;
}

.spec-row {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 20px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r);
  gap:16px;
}

.spec-row:hover { border-color:var(--border-bright); }

.spec-key {
  font-size:13px;
  color:var(--text-muted);
  text-transform:uppercase;
  letter-spacing:1px;
  flex:1;
}

.spec-val {
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--text-primary);
  text-align:right;
}

.spec-val .tag {
  font-family:var(--font-body);
  font-size:11px;
  padding:3px 8px;
  border-radius:4px;
  margin-left:8px;
  background:var(--solar-dim);
  color:var(--solar);
  border:1px solid var(--solar-glow);
}

/* ===========================
   BATTERY SIMULATOR
=========================== */
.sim-layout {
  display:grid;
  grid-template-columns:380px 1fr;
  gap:28px;
  align-items:start;
}

@media(max-width:900px) {
  .sim-layout { grid-template-columns:1fr; }
}

.sim-panel {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:32px;
  position:sticky;
  top:calc(var(--nav-h) + 20px);
}

.sim-panel-title {
  font-family:var(--font-display);
  font-size:14px;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--text-secondary);
  margin-bottom:24px;
}

/* Battery preset buttons */
.battery-presets {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
  margin-bottom:24px;
}

.preset-btn {
  background:var(--bg-surface);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:16px 12px;
  cursor:pointer;
  text-align:center;
  transition: all 0.2s;
  position:relative;
}

.preset-btn:hover {
  border-color:var(--battery-glow);
  background:var(--battery-dim);
}

.preset-btn.active {
  border-color:var(--battery-c);
  background:var(--battery-dim);
  box-shadow: 0 0 20px var(--battery-glow);
}

.preset-btn .pb-kwh {
  font-family:var(--font-display);
  font-size:20px;
  font-weight:700;
  color:var(--battery-c);
  display:block;
  line-height:1;
}

.preset-btn .pb-label {
  font-size:11px;
  color:var(--text-muted);
  display:block;
  margin-top:4px;
  letter-spacing:1px;
}

.preset-btn .pb-price {
  font-size:11px;
  color:var(--text-secondary);
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
}

.preset-btn .pb-badge {
  position:absolute;
  top:-8px;
  right:-8px;
  background:var(--solar);
  color:#000;
  font-size:9px;
  font-weight:700;
  padding:2px 6px;
  border-radius:4px;
  letter-spacing:1px;
  text-transform:uppercase;
}

/* Custom capacity slider */
.slider-wrap {
  margin-bottom:28px;
}

.slider-label {
  display:flex;
  justify-content:space-between;
  margin-bottom:10px;
  font-size:13px;
  color:var(--text-secondary);
}

.slider-label strong {
  font-family:var(--font-mono);
  color:var(--battery-c);
  font-size:16px;
}

input[type="range"] {
  width:100%;
  height:4px;
  appearance:none;
  background: linear-gradient(to right, var(--battery-c) var(--val,0%), var(--border-bright) var(--val,0%));
  border-radius:2px;
  outline:none;
  cursor:pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance:none;
  width:20px;height:20px;
  border-radius:50%;
  background:var(--battery-c);
  border:3px solid var(--bg-base);
  box-shadow: 0 0 12px var(--battery-glow);
  cursor:pointer;
  transition:transform 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform:scale(1.3);
}

/* ===========================
   RESULTS CARDS
=========================== */
.results-grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:16px;
  margin-bottom:24px;
}

.result-card {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:22px;
  transition:all 0.3s;
}

.result-card:hover {
  border-color:var(--border-bright);
  transform:translateY(-2px);
}

.result-card .rc-label {
  font-size:11px;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:10px;
}

.result-card .rc-value {
  font-family:var(--font-display);
  font-size:28px;
  font-weight:700;
  line-height:1;
  margin-bottom:4px;
}

.result-card .rc-unit {
  font-size:13px;
  font-weight:400;
  color:var(--text-secondary);
  margin-left:3px;
}

.result-card .rc-sub {
  font-size:12px;
  color:var(--text-secondary);
  margin-top:6px;
}

/* Color variants */
.rc-solar  .rc-value { color:var(--solar); }
.rc-grid   .rc-value { color:var(--grid-c); }
.rc-bat    .rc-value { color:var(--battery-c); }
.rc-money  .rc-value { color:var(--export-c); }

/* ===========================
   CHARGING TIMELINE
=========================== */
.timeline-card {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:28px;
  margin-bottom:24px;
}

.timeline-title {
  font-family:var(--font-display);
  font-size:13px;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--text-secondary);
  margin-bottom:24px;
}

.timeline-bar-wrap {
  position:relative;
  margin-bottom:8px;
}

.timeline-labels {
  display:flex;
  justify-content:space-between;
  font-size:10px;
  color:var(--text-muted);
  font-family:var(--font-mono);
  margin-bottom:8px;
}

.timeline-track {
  height:36px;
  background:var(--bg-surface);
  border-radius:6px;
  overflow:hidden;
  position:relative;
  border:1px solid var(--border);
}

.timeline-segment {
  position:absolute;
  top:0;bottom:0;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:11px;
  font-weight:600;
  letter-spacing:0.5px;
  transition:all 0.6s cubic-bezier(0.4,0,0.2,1);
  overflow:hidden;
  white-space:nowrap;
}

.seg-solar   { background:linear-gradient(135deg,#f59e0b,#fcd34d); color:#000; }
.seg-battery { background:linear-gradient(135deg,#059669,#10b981); color:#fff; }
.seg-grid    { background:linear-gradient(135deg,#1d4ed8,#3b82f6); color:#fff; }
.seg-idle    { background:var(--bg-surface); color:var(--text-muted); }

.timeline-legend {
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-top:12px;
}

.tl-item {
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--text-secondary);
}

.tl-dot {
  width:10px;height:10px;
  border-radius:2px;
}

/* ===========================
   COMPARISON TABLE
=========================== */
.compare-table {
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  overflow:hidden;
}

.compare-table th {
  background:var(--bg-surface);
  padding:14px 20px;
  text-align:left;
  font-size:11px;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--text-muted);
  font-family:var(--font-body);
  font-weight:600;
  border-bottom:1px solid var(--border);
}

.compare-table td {
  padding:16px 20px;
  border-bottom:1px solid var(--border);
  font-size:14px;
  vertical-align:middle;
}

.compare-table tr:last-child td { border-bottom:none; }

.compare-table tr.highlight td {
  background:rgba(16,185,129,0.06);
}

.compare-table tr.highlight td:first-child {
  border-left:3px solid var(--battery-c);
}

.compare-table .num {
  font-family:var(--font-mono);
  font-size:15px;
}

.tag-recommended {
  display:inline-block;
  background:var(--battery-c);
  color:#000;
  font-size:9px;
  font-weight:700;
  padding:2px 7px;
  border-radius:4px;
  letter-spacing:1px;
  text-transform:uppercase;
  margin-left:6px;
  vertical-align:middle;
}

.tag-overbudget {
  display:inline-block;
  background:rgba(239,68,68,0.15);
  color:var(--danger);
  border:1px solid rgba(239,68,68,0.3);
  font-size:9px;
  font-weight:700;
  padding:2px 7px;
  border-radius:4px;
  letter-spacing:1px;
  text-transform:uppercase;
  margin-left:6px;
  vertical-align:middle;
}

/* ===========================
   RECOMMENDATION BOX
=========================== */
.rec-box {
  background: linear-gradient(135deg, rgba(16,185,129,0.08), rgba(6,10,20,0));
  border:1px solid var(--battery-glow);
  border-radius:var(--r-lg);
  padding:28px 32px;
  margin-top:24px;
  position:relative;
  overflow:hidden;
}

.rec-box::before {
  content:'';
  position:absolute;
  top:0;left:0;
  width:4px;bottom:0;
  background:var(--battery-c);
}

.rec-box h3 {
  font-family:var(--font-display);
  font-size:15px;
  letter-spacing:1px;
  color:var(--battery-c);
  margin-bottom:12px;
}

.rec-box p {
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  margin-bottom:12px;
}

.rec-box p:last-child { margin-bottom:0; }

.rec-box strong { color:var(--text-primary); }

/* ===========================
   BUTTONS
=========================== */
.btn {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 28px;
  border-radius:10px;
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
  text-decoration:none;
  cursor:pointer;
  border:none;
  transition:all 0.25s;
}

.btn-primary {
  background:var(--solar);
  color:#000;
  box-shadow: 0 4px 24px var(--solar-glow);
}

.btn-primary:hover {
  background:var(--solar-light);
  transform:translateY(-2px);
  box-shadow: 0 8px 32px var(--solar-glow);
}

.btn-outline {
  background:transparent;
  color:var(--text-primary);
  border:1px solid var(--border-bright);
}

.btn-outline:hover {
  border-color:var(--solar);
  color:var(--solar);
  background:var(--solar-dim);
}

/* ===========================
   PROGRESS BARS
=========================== */
.progress-wrap {
  margin-bottom:20px;
}

.progress-header {
  display:flex;
  justify-content:space-between;
  margin-bottom:8px;
  font-size:13px;
}

.progress-label { color:var(--text-secondary); }
.progress-pct {
  font-family:var(--font-mono);
  color:var(--text-primary);
}

.progress-track {
  height:8px;
  background:var(--bg-surface);
  border-radius:4px;
  overflow:hidden;
}

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

/* ===========================
   ROI SECTION
=========================== */
.roi-card {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:32px;
  text-align:center;
  position:relative;
  overflow:hidden;
}

.roi-card::after {
  content:'';
  position:absolute;
  bottom:0;left:0;right:0;
  height:100px;
  background:radial-gradient(ellipse at bottom, var(--solar-dim), transparent);
  pointer-events:none;
}

.roi-big {
  font-family:var(--font-display);
  font-size:clamp(40px,6vw,72px);
  font-weight:900;
  color:var(--solar);
  line-height:1;
  margin:16px 0 8px;
}

.roi-label {
  font-size:13px;
  color:var(--text-muted);
  letter-spacing:2px;
  text-transform:uppercase;
}

.roi-sub {
  font-size:14px;
  color:var(--text-secondary);
  margin-top:12px;
}

/* ===========================
   FOOTER
=========================== */
.footer {
  border-top:1px solid var(--border);
  padding:32px;
  text-align:center;
  font-size:13px;
  color:var(--text-muted);
  position:relative;
  z-index:1;
}

.footer a {
  color:var(--solar);
  text-decoration:none;
}

/* ===========================
   DIVIDER
=========================== */
.divider {
  height:1px;
  background:var(--border);
  margin:0;
}

/* ===========================
   BADGE
=========================== */
.badge {
  display:inline-block;
  font-size:11px;
  padding:4px 10px;
  border-radius:20px;
  letter-spacing:1px;
  text-transform:uppercase;
  font-weight:600;
}

.badge-solar   { background:var(--solar-dim);   color:var(--solar);   border:1px solid var(--solar-glow); }
.badge-battery { background:var(--battery-dim); color:var(--battery-c); border:1px solid var(--battery-glow); }
.badge-grid    { background:var(--grid-dim);    color:var(--grid-c);  border:1px solid var(--grid-glow); }

/* ===========================
   KEYFRAME ANIMATIONS
=========================== */
@keyframes fade-up {
  from { opacity:0; transform:translateY(24px); }
  to   { opacity:1; transform:translateY(0); }
}

@keyframes fade-in {
  from { opacity:0; }
  to   { opacity:1; }
}

@keyframes pulse-solar {
  0%,100% { box-shadow:0 0 0 0 var(--solar-glow); }
  50%      { box-shadow:0 0 0 6px transparent; }
}

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

@keyframes spin-slow {
  from { transform:rotate(0deg); }
  to   { transform:rotate(360deg); }
}

@keyframes float {
  0%,100% { transform:translateY(0); }
  50%      { transform:translateY(-8px); }
}

@keyframes counter-up {
  from { opacity:0; transform:scale(0.8); }
  to   { opacity:1; transform:scale(1); }
}

/* Scroll-triggered fade in */
.reveal {
  opacity:0;
  transform:translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity:1;
  transform:translateY(0);
}

/* Staggered children */
.stagger > *:nth-child(1) { transition-delay:0.05s; }
.stagger > *:nth-child(2) { transition-delay:0.12s; }
.stagger > *:nth-child(3) { transition-delay:0.19s; }
.stagger > *:nth-child(4) { transition-delay:0.26s; }
.stagger > *:nth-child(5) { transition-delay:0.33s; }

/* ===========================
   GLOW EFFECTS
=========================== */
.glow-solar   { text-shadow:0 0 24px var(--solar-glow); }
.glow-battery { text-shadow:0 0 24px var(--battery-glow); }
.glow-grid    { text-shadow:0 0 24px var(--grid-glow); }

/* ===========================
   TOOLTIP
=========================== */
[data-tip] {
  position:relative;
  cursor:help;
}

[data-tip]::after {
  content:attr(data-tip);
  position:absolute;
  bottom:calc(100% + 8px);
  left:50%;
  transform:translateX(-50%);
  background:#1e293b;
  border:1px solid var(--border-bright);
  color:var(--text-secondary);
  font-size:12px;
  padding:6px 10px;
  border-radius:6px;
  white-space:nowrap;
  pointer-events:none;
  opacity:0;
  transition:opacity 0.2s;
  z-index:50;
}

[data-tip]:hover::after { opacity:1; }

/* ===========================
   RESPONSIVE
=========================== */
@media(max-width:768px) {
  .navbar { padding:0 16px; }
  .nav-links { display:none; }
  .section, .section-sm { padding:48px 16px; }
  .hero { padding:40px 16px; }
  .hero-divider { display:none; }
  .hero-stats { gap:20px; }
  .cards-grid { grid-template-columns:1fr 1fr; }
  .sim-layout { grid-template-columns:1fr; }
  .sim-panel { position:static; }
  .compare-table { font-size:12px; }
  .compare-table th, .compare-table td { padding:12px; }
}

@media(max-width:480px) {
  .cards-grid { grid-template-columns:1fr; }
  .battery-presets { grid-template-columns:1fr 1fr; }
}

/* ===========================
   NUMBER COUNTER ANIMATION
=========================== */
.count-anim {
  display:inline-block;
  animation:counter-up 0.5s ease forwards;
}

/* ===========================
   SEPARATOR LINES IN HERO
=========================== */
.hero-sep {
  width:1px; height:48px;
  background:var(--border-bright);
  display:inline-block;
  vertical-align:middle;
  margin:0 8px;
}