/* ============================================================
   Solar Installers Manchester — Home-of-the-Future landing
   Dark-mode HUD aesthetic. Cyan-lead accent system.
   ============================================================ */

:root {
  /* Base */
  --bg-0: #0B1220;
  --bg-1: #111827;
  --bg-2: #0E1628;
  --surface: rgba(255,255,255,0.035);
  --surface-2: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.10);
  --border-strong: rgba(255,255,255,0.18);

  /* Text */
  --text: #F3F4F6;
  --text-body: #D1D5DB;
  --text-muted: #9CA3AF;
  --text-dim: #6B7280;

  /* Accents (semantic) */
  --cyan: #22D3EE;
  --blue: #3B82F6;
  --amber: #F59E0B;
  --green: #10B981;
  --violet: #8B5CF6;

  /* Glow halos */
  --glow-cyan: 0 0 24px rgba(34,211,238,0.35), 0 0 2px rgba(34,211,238,0.8);
  --glow-amber: 0 0 24px rgba(245,158,11,0.35), 0 0 2px rgba(245,158,11,0.8);
  --glow-green: 0 0 24px rgba(16,185,129,0.30);
  --glow-violet: 0 0 24px rgba(139,92,246,0.30);

  /* Type */
  --font-display: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, Segoe UI, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, Segoe UI, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Radii */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-pill: 999px;
}

/* Alternate type pairing (set on <html data-type-pair=...>) */
html[data-type-pair="inter-jbmono"] { --font-display: 'Inter', sans-serif; --font-body: 'Inter', sans-serif; --font-mono: 'JetBrains Mono', monospace; }
html[data-type-pair="space-plex"]   { --font-display: 'Space Grotesk', sans-serif; --font-body: 'Space Grotesk', sans-serif; --font-mono: 'IBM Plex Mono', monospace; }
html[data-type-pair="inter-plex"]   { --font-display: 'Inter', sans-serif; --font-body: 'Inter', sans-serif; --font-mono: 'IBM Plex Mono', monospace; }
html[data-type-pair="space-jbmono"] { --font-display: 'Space Grotesk', sans-serif; --font-body: 'Space Grotesk', sans-serif; --font-mono: 'JetBrains Mono', monospace; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg-0); }
body {
  font-family: var(--font-body);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 800px at 70% 10%, #14213D 0%, transparent 55%),
    radial-gradient(900px 700px at 10% 90%, #0a1a2e 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
  background-attachment: fixed;
}

h1, h2, h3, h4 { font-family: var(--font-display); color: var(--text); letter-spacing: -0.01em; margin: 0; font-weight: 600; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ============================================================
   TOP BAR
   ============================================================ */
.topbar {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(11,18,32,0.72);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex; align-items: center; gap: 24px;
  padding: 14px 24px; max-width: 1280px; margin: 0 auto;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 600; color: var(--text);
  letter-spacing: -0.01em;
}
.logo-mark {
  width: 28px; height: 28px; border-radius: 7px;
  background: conic-gradient(from 180deg, var(--cyan), var(--blue), var(--violet), var(--cyan));
  box-shadow: var(--glow-cyan);
  position: relative;
}
.logo-mark::after {
  content: ""; position: absolute; inset: 6px; border-radius: 3px;
  background: var(--bg-0);
}
.logo-mark::before {
  content: ""; position: absolute; inset: 10px; border-radius: 2px;
  background: var(--cyan); box-shadow: 0 0 10px var(--cyan);
}
.logo-text { font-size: 15px; }
.logo-text small { display: block; font-size: 10px; color: var(--text-muted); font-weight: 400; letter-spacing: 0.18em; text-transform: uppercase; }

.nav { display: flex; gap: 22px; margin-left: 20px; }
.nav a { font-size: 14px; color: var(--text-body); transition: color .18s; }
.nav a:hover { color: var(--cyan); }

.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.phone-num { font-family: var(--font-mono); font-size: 14px; color: var(--text); }
.phone-num span { color: var(--text-muted); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; display: block; line-height: 1; }
.mcs-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  padding: 6px 10px; border-radius: var(--r-pill);
  border: 1px solid rgba(34,211,238,0.35); color: var(--cyan);
  background: rgba(34,211,238,0.04);
}
.mcs-pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }

/* Finance ribbon */
.finance-ribbon {
  text-align: center; padding: 9px 16px;
  background: linear-gradient(90deg, rgba(245,158,11,0.12), rgba(245,158,11,0.06), rgba(245,158,11,0.12));
  border-bottom: 1px solid rgba(245,158,11,0.25);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em;
  color: #FCD34D;
}
.finance-ribbon b { color: var(--amber); font-weight: 600; }
.finance-ribbon .sep { opacity: 0.4; margin: 0 10px; }

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; padding: 56px 0 32px; }
.hero-grid { display: grid; gap: 48px; align-items: center; }

.hero.layout-split .hero-grid { grid-template-columns: 1.1fr 1fr; }
.hero.layout-centered .hero-grid { grid-template-columns: 1fr; justify-items: center; text-align: center; }
.hero.layout-fullbleed .hero-grid { grid-template-columns: 1fr; }
.hero.layout-fullbleed .hero-stage { order: -1; }
.hero.layout-fullbleed .hero-copy { max-width: 620px; margin-top: -120px; position: relative; z-index: 3; }

@media (max-width: 900px) {
  .hero.layout-split .hero-grid,
  .hero.layout-fullbleed .hero-grid { grid-template-columns: 1fr; }
  .hero.layout-fullbleed .hero-copy { margin-top: 0; }
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em;
  color: var(--cyan); text-transform: uppercase;
  padding: 5px 12px; border: 1px solid rgba(34,211,238,0.35); border-radius: var(--r-pill);
  background: rgba(34,211,238,0.04);
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero h1 {
  font-size: clamp(36px, 5.4vw, 58px);
  line-height: 1.04;
  margin: 18px 0 18px;
  font-weight: 600;
  color: var(--text);
}
.hero h1 em { font-style: normal; color: var(--cyan); text-shadow: 0 0 24px rgba(34,211,238,0.35); }
.hero h1 .amber { color: var(--amber); font-style: normal; text-shadow: 0 0 24px rgba(245,158,11,0.30); }

.hero-sub {
  font-size: 17px; color: var(--text-body);
  max-width: 560px; margin-bottom: 28px;
}
.hero.layout-centered .hero-sub { margin-left: auto; margin-right: auto; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero.layout-centered .cta-row { justify-content: center; }

.hero-forecast {
  margin-top: 24px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 14px 16px;
  max-width: 560px;
}
.hero.layout-centered .hero-forecast { margin-left: auto; margin-right: auto; }
.hero-forecast-head {
  display: flex; align-items: center; gap: 14px; justify-content: space-between;
  margin-bottom: 10px; flex-wrap: wrap;
}
.hero-forecast-row {
  display: grid; grid-template-columns: 1.1fr 1.1fr auto; gap: 8px;
}
.hero-forecast-row input {
  background: rgba(0,0,0,0.3); border: 1px solid var(--border);
  color: var(--text); padding: 11px 12px; border-radius: var(--r-sm);
  font-family: var(--font-body); font-size: 14px;
  outline: none; transition: border-color .15s; min-width: 0;
}
.hero-forecast-row input::placeholder { color: var(--text-dim); }
.hero-forecast-row input:focus { border-color: var(--cyan); }
.hero-forecast-row .btn { padding: 10px 18px; font-size: 14px; white-space: nowrap; }
@media (max-width: 560px) {
  .hero-forecast-row { grid-template-columns: 1fr; }
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-body); font-weight: 500; font-size: 15px;
  border: 1px solid transparent; letter-spacing: -0.005em;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 100%);
  color: #03131A;
  font-weight: 600;
  box-shadow: 0 10px 30px -10px rgba(34,211,238,0.6), inset 0 1px 0 rgba(255,255,255,0.2);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 14px 40px -10px rgba(34,211,238,0.8), inset 0 1px 0 rgba(255,255,255,0.3); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--surface-2); border-color: rgba(34,211,238,0.4); }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* Hero stage */
.hero-stage {
  position: relative;
  aspect-ratio: 1.15 / 1;
  border-radius: 28px;
  overflow: visible;
  background:
    radial-gradient(80% 70% at 50% 45%, rgba(34,211,238,0.12), transparent 65%),
    radial-gradient(120% 80% at 50% 100%, rgba(245,158,11,0.08), transparent 60%),
    linear-gradient(180deg, #0c1628 0%, #070d1a 100%);
  border: 1px solid var(--border);
  box-shadow: 0 40px 80px -30px rgba(0,0,0,0.7), inset 0 1px 0 rgba(255,255,255,0.04);
}
.hero-stage::before {
  /* subtle grid */
  content: "";
  position: absolute; inset: 0;
  border-radius: 28px;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(60% 60% at 50% 50%, black, transparent 90%);
  pointer-events: none;
}
.hero-stage::after {
  /* horizon glow */
  content: "";
  position: absolute; left: -10%; right: -10%; bottom: -30%;
  height: 60%;
  background: radial-gradient(closest-side, rgba(34,211,238,0.20), transparent);
  pointer-events: none;
  filter: blur(10px);
}

.stage-model {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 1;
}
model-viewer {
  width: 100%; height: 100%;
  background: transparent;
  --poster-color: transparent;
  outline: none;
}

.stage-corner {
  position: absolute; font-family: var(--font-mono); font-size: 10px;
  color: var(--text-muted); letter-spacing: 0.18em; text-transform: uppercase;
}
.stage-corner.tl { top: 14px; left: 18px; }
.stage-corner.tr { top: 14px; right: 18px; }
.stage-corner.bl { bottom: 14px; left: 18px; }
.stage-corner.br { bottom: 14px; right: 18px; }
.stage-corner .dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); margin-right: 6px; vertical-align: middle; }

/* HUD cards */
.hud-card {
  position: absolute;
  z-index: 4;
  background: rgba(12,20,36,0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  padding: 12px 14px;
  min-width: 150px;
  box-shadow: 0 12px 30px -12px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.05);
  opacity: 1;
}
.hud-card .label {
  display: block; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-muted);
}
.hud-card .value {
  font-family: var(--font-mono); font-weight: 600;
  font-size: 22px; color: var(--text); letter-spacing: -0.01em;
  display: flex; align-items: baseline; gap: 4px;
  margin-top: 2px;
}
.hud-card .value .unit { font-size: 12px; font-weight: 400; color: var(--text-muted); }
.hud-card .trend { font-family: var(--font-mono); font-size: 10px; margin-top: 4px; letter-spacing: 0.08em; }

.hud-card.accent-cyan { border-color: rgba(34,211,238,0.35); box-shadow: 0 0 0 1px rgba(34,211,238,0.1), 0 12px 30px -12px rgba(34,211,238,0.25); }
.hud-card.accent-cyan .value { color: var(--cyan); }
.hud-card.accent-amber { border-color: rgba(245,158,11,0.35); box-shadow: 0 0 0 1px rgba(245,158,11,0.1), 0 12px 30px -12px rgba(245,158,11,0.25); }
.hud-card.accent-amber .value { color: var(--amber); }
.hud-card.accent-green { border-color: rgba(16,185,129,0.35); box-shadow: 0 0 0 1px rgba(16,185,129,0.1), 0 12px 30px -12px rgba(16,185,129,0.25); }
.hud-card.accent-green .value { color: var(--green); }
.hud-card.accent-violet { border-color: rgba(139,92,246,0.35); box-shadow: 0 0 0 1px rgba(139,92,246,0.1), 0 12px 30px -12px rgba(139,92,246,0.25); }
.hud-card.accent-violet .value { color: var(--violet); }

/* ring card */
.ring-card {
  position: absolute;
  z-index: 4;
  display: flex; align-items: center; gap: 10px;
  background: rgba(12,20,36,0.75);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(34,211,238,0.4);
  border-radius: var(--r-lg);
  padding: 10px 14px 10px 10px;
  box-shadow: 0 0 30px -8px rgba(34,211,238,0.35);
}
.ring-svg { width: 56px; height: 56px; }
.ring-card .pct { font-family: var(--font-mono); font-size: 22px; font-weight: 600; color: var(--cyan); letter-spacing: -0.02em; }
.ring-card .pct-label { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.18em; color: var(--text-muted); text-transform: uppercase; display: block; margin-top: 1px; }
.ring-card .pct-date { font-size: 9px; color: var(--text-dim); margin-top: 2px; }

/* Credential pill rail */
.credential-rail {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 28px;
}
.cred-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--r-pill);
  border: 1px solid rgba(34,211,238,0.3);
  background: rgba(34,211,238,0.03);
  color: var(--text-body);
  font-size: 12px; font-family: var(--font-mono); letter-spacing: 0.08em;
  transition: border-color .18s, background .18s;
}
.cred-pill:hover { border-color: rgba(34,211,238,0.6); background: rgba(34,211,238,0.08); }
.cred-pill .tick { width: 14px; height: 14px; color: var(--cyan); }
.cred-pill b { color: var(--text); font-weight: 600; }

/* ============================================================
   TELEMETRY RIBBON
   ============================================================ */
.telemetry {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
  margin-top: 42px;
}
.telemetry-inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
  max-width: 1280px; margin: 0 auto;
}
.telem-cell {
  padding: 20px 24px;
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
  position: relative;
}
.telem-cell:first-child { border-left: none; }
.telem-cell .label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; color: var(--text-muted); text-transform: uppercase; }
.telem-cell .value { font-family: var(--font-mono); font-size: 28px; font-weight: 600; color: var(--text); letter-spacing: -0.02em; }
.telem-cell .value .unit { font-size: 13px; font-weight: 400; color: var(--text-muted); margin-left: 4px; }
.telem-cell .value .star { color: var(--amber); }
@media (max-width: 768px) {
  .telemetry-inner { grid-template-columns: 1fr 1fr; }
  .telem-cell:nth-child(3) { border-left: none; }
  .telem-cell:nth-child(3), .telem-cell:nth-child(4) { border-top: 1px solid var(--border); }
}

/* Co-brand strip */
.cobrand {
  display: flex; justify-content: center; align-items: center; gap: 42px;
  padding: 28px 24px; opacity: 0.45;
  flex-wrap: wrap;
}
.cobrand span { font-family: var(--font-display); font-weight: 600; color: var(--text); font-size: 17px; letter-spacing: 0.02em; }
.cobrand .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-muted); }

/* ============================================================
   Section wrapper
   ============================================================ */
section { position: relative; }
.section-pad { padding: 80px 0; }
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.section-head .eyebrow { margin-bottom: 16px; }
.section-head h2 {
  font-size: clamp(30px, 3.4vw, 42px);
  line-height: 1.08;
  margin-bottom: 14px;
}
.section-head p { color: var(--text-body); font-size: 17px; max-width: 620px; }
.section-head.center p { margin-left: auto; margin-right: auto; }

/* ============================================================
   SERVICE TILES (mini-dashboards)
   ============================================================ */
.services-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 1000px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .services-grid { grid-template-columns: 1fr; } }

.service-card {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
  transition: transform .2s, border-color .2s, box-shadow .2s;
  overflow: hidden;
  min-height: 260px;
  display: flex; flex-direction: column;
}
.service-card::before {
  content: "";
  position: absolute; inset: -1px;
  border-radius: var(--r-lg);
  padding: 1px;
  background: linear-gradient(135deg, var(--accent, var(--cyan)) 0%, transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: 0.45;
}
.service-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: 0 20px 40px -20px rgba(0,0,0,0.6), 0 0 40px -20px var(--accent, var(--cyan)); }

.service-card[data-accent="cyan"] { --accent: var(--cyan); }
.service-card[data-accent="amber"] { --accent: var(--amber); }
.service-card[data-accent="green"] { --accent: var(--green); }
.service-card[data-accent="violet"] { --accent: var(--violet); }

.svc-icon {
  width: 44px; height: 44px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  background: color-mix(in oklab, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 35%, transparent);
  color: var(--accent);
  margin-bottom: 20px;
}
.svc-title { font-family: var(--font-display); font-size: 17px; color: var(--text); margin-bottom: 4px; font-weight: 600; }
.svc-brands { font-family: var(--font-mono); font-size: 10px; color: var(--text-muted); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 16px; }

.svc-metric { margin-top: auto; }
.svc-metric .v { font-family: var(--font-mono); font-size: 28px; font-weight: 600; color: var(--accent); letter-spacing: -0.02em; }
.svc-metric .v .small { font-size: 13px; color: var(--text-muted); font-weight: 400; margin-left: 4px; }
.svc-metric .outcome { color: var(--text-body); font-size: 14px; margin-top: 2px; }

.svc-finance { font-family: var(--font-mono); font-size: 10px; color: var(--text-muted); letter-spacing: 0.1em; margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--border); }
.svc-finance b { color: var(--text); }

.svc-cta {
  margin-top: 14px; display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent); font-size: 13px; font-weight: 500;
}
.svc-cta .arrow { transition: transform .2s; }
.service-card:hover .svc-cta .arrow { transform: translateX(3px); }

/* ============================================================
   3D PANEL SECTION
   ============================================================ */
.model-section {
  padding: 80px 0;
}
.model-grid {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center;
}
@media (max-width: 900px) { .model-grid { grid-template-columns: 1fr; } }

.model-stage {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  overflow: hidden;
  background:
    radial-gradient(70% 70% at 50% 40%, rgba(34,211,238,0.14), transparent 65%),
    linear-gradient(180deg, #0c1628, #06101e);
  border: 1px solid var(--border);
  box-shadow: inset 0 0 80px rgba(0,0,0,0.5);
}
.model-stage model-viewer { width: 100%; height: 100%; }

.model-stage .hotspot {
  --hs-accent: var(--cyan);
  display: block;
  width: 22px; height: 22px; border-radius: 50%;
  background: rgba(12,20,36,0.85);
  border: 1.5px solid var(--hs-accent);
  box-shadow: 0 0 14px var(--hs-accent);
  cursor: pointer;
  position: relative;
  padding: 0;
  color: var(--hs-accent);
}
.model-stage .hotspot::before {
  content: ""; position: absolute; inset: 5px; border-radius: 50%;
  background: var(--hs-accent); box-shadow: 0 0 8px var(--hs-accent);
  animation: hsPulse 2.6s ease-in-out infinite;
}
@keyframes hsPulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.35; transform: scale(0.7); } }
.model-stage .hotspot.amber { --hs-accent: var(--amber); }
.model-stage .hotspot.green { --hs-accent: var(--green); }
.model-stage .hotspot.violet { --hs-accent: var(--violet); }

.model-stage .hs-tooltip {
  position: absolute;
  background: rgba(12,20,36,0.92);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  padding: 10px 14px;
  min-width: 220px;
  transform: translate(14px, -50%);
  top: 50%; left: 100%;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity .18s ease, visibility .18s;
  z-index: 5;
}
.model-stage .hotspot:hover .hs-tooltip,
.model-stage .hotspot:focus .hs-tooltip,
.model-stage .hotspot:focus-visible .hs-tooltip {
  opacity: 1; visibility: visible;
}
.model-stage .hs-tooltip .t-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; color: var(--text-muted); text-transform: uppercase; }
.model-stage .hs-tooltip .t-value { font-family: var(--font-mono); font-size: 15px; color: var(--text); font-weight: 600; margin-top: 2px; }

.model-stage .stage-legend {
  position: absolute; left: 16px; bottom: 14px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; color: var(--text-muted); text-transform: uppercase;
}
.model-stage .stage-legend::before { content: ""; display: inline-block; width: 6px; height: 6px; background: var(--cyan); border-radius: 50%; margin-right: 8px; vertical-align: middle; box-shadow: 0 0 6px var(--cyan); }

.spec-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; }
.spec-list li {
  display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: baseline;
  padding: 12px 0; border-top: 1px solid var(--border);
}
.spec-list li:last-child { border-bottom: 1px solid var(--border); }
.spec-list .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; color: var(--text-muted); text-transform: uppercase; }
.spec-list .v { font-family: var(--font-mono); font-weight: 600; color: var(--text); font-size: 14px; }

/* ============================================================
   ENERGY FLOW CHART
   ============================================================ */
.flow-panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
}
.flow-head {
  display: flex; align-items: center; flex-wrap: wrap; gap: 18px;
  margin-bottom: 22px;
  padding-bottom: 18px; border-bottom: 1px solid var(--border);
}
.flow-head h3 { font-size: 18px; margin-right: auto; }
.flow-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--text-muted); text-transform: uppercase; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; }
.legend-item { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--text-body); }
.legend-dot { width: 9px; height: 9px; border-radius: 50%; }
.legend-dot.d-cyan { background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
.legend-dot.d-amber { background: var(--amber); box-shadow: 0 0 6px var(--amber); }
.legend-dot.d-green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.legend-dot.d-violet { background: var(--violet); box-shadow: 0 0 6px var(--violet); }

.chart-wrap { position: relative; }
#energy-chart { width: 100%; height: 320px; display: block; }

.flow-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--border);
}
.flow-stats > div { padding: 0 18px; border-left: 1px solid var(--border); }
.flow-stats > div:first-child { border-left: none; padding-left: 0; }
.flow-stats .l { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; color: var(--text-muted); text-transform: uppercase; }
.flow-stats .v { font-family: var(--font-mono); font-size: 20px; font-weight: 600; color: var(--text); letter-spacing: -0.02em; margin-top: 4px; }
.flow-stats .v.cyan { color: var(--cyan); }
.flow-stats .v.amber { color: var(--amber); }
.flow-stats .v.green { color: var(--green); }
.flow-stats .v.violet { color: var(--violet); }
@media (max-width: 700px) {
  .flow-stats { grid-template-columns: repeat(2, 1fr); gap: 14px 0; }
  .flow-stats > div:nth-child(3) { border-left: none; padding-left: 0; }
}

/* ============================================================
   CASE STUDIES
   ============================================================ */
.case-filters { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.case-filter {
  padding: 8px 14px; border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: transparent; color: var(--text-body);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: border-color .18s, color .18s, background .18s;
}
.case-filter:hover { border-color: var(--border-strong); color: var(--text); }
.case-filter.active { border-color: var(--cyan); color: var(--cyan); background: rgba(34,211,238,0.05); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 1000px) { .case-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .case-grid { grid-template-columns: 1fr; } }

.case-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .2s, border-color .2s;
}
.case-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }

.case-photo {
  aspect-ratio: 16/10;
  position: relative;
  background: repeating-linear-gradient(45deg, #0f1d35 0 10px, #0b1628 10px 20px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.case-image {
  width: 100%; height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.hero-image {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 28px;
}
.case-photo .ph-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em;
  color: var(--text-muted); text-transform: uppercase; text-align: center;
  padding: 6px 12px; background: rgba(11,18,32,0.7); border-radius: var(--r-sm);
  border: 1px solid var(--border);
}
.case-snapshot {
  position: absolute; right: 10px; bottom: 10px;
  background: rgba(12,20,36,0.9);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  padding: 10px 12px;
  backdrop-filter: blur(10px);
  display: flex; gap: 14px; align-items: center;
}
.case-snapshot .mini-metric .l { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em; color: var(--text-muted); text-transform: uppercase; }
.case-snapshot .mini-metric .v { font-family: var(--font-mono); font-size: 15px; font-weight: 600; color: var(--cyan); }
.case-snapshot svg.mini-spark { display: block; }

.case-body { padding: 18px; }
.case-meta {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em;
  color: var(--text-muted); text-transform: uppercase;
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px;
}
.case-meta .sep { opacity: 0.4; }
.case-tag { color: var(--cyan); }
.case-quote { color: var(--text); font-size: 15px; line-height: 1.45; margin: 10px 0 14px; }
.case-name { font-family: var(--font-mono); font-size: 11px; color: var(--text-muted); letter-spacing: 0.08em; }
.case-name b { color: var(--text); font-weight: 600; }

/* ============================================================
   ENGINEER / VAN STRIP
   ============================================================ */
.crew-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
@media (max-width: 900px) { .crew-strip { grid-template-columns: repeat(2, 1fr); } }

.crew-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 18px;
  display: flex; gap: 14px; align-items: center;
}
.crew-avatar {
  width: 56px; height: 56px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, #1f2d48, #0c1628);
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 600; color: var(--cyan);
  font-size: 16px; letter-spacing: 0.06em;
}
.crew-avatar-img {
  width: 56px; height: 56px; border-radius: 50%; flex-shrink: 0;
  object-fit: cover;
  border: 1px solid var(--border-strong);
}
.crew-name { color: var(--text); font-weight: 600; font-size: 15px; }
.crew-role { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; color: var(--text-muted); text-transform: uppercase; margin-top: 3px; }
.crew-cred { font-size: 12px; color: var(--text-muted); margin-top: 6px; }

/* ============================================================
   FINANCE BUS BLOCK
   ============================================================ */
.finance-panel {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px;
  background: linear-gradient(135deg, rgba(245,158,11,0.08), rgba(34,211,238,0.05));
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: 24px;
  padding: 44px;
  position: relative; overflow: hidden;
}
.finance-panel::before {
  content: ""; position: absolute; right: -80px; top: -80px; width: 280px; height: 280px;
  background: radial-gradient(closest-side, rgba(245,158,11,0.15), transparent);
  filter: blur(10px);
}
@media (max-width: 800px) { .finance-panel { grid-template-columns: 1fr; padding: 28px; } }
.finance-panel h2 { font-size: clamp(26px, 3vw, 36px); margin-bottom: 12px; }
.finance-grant { font-family: var(--font-mono); font-size: 64px; line-height: 1; color: var(--amber); font-weight: 600; letter-spacing: -0.03em; }
.finance-grant .sub { font-size: 12px; color: var(--text-muted); letter-spacing: 0.14em; text-transform: uppercase; display: block; margin-top: 8px; }
.finance-opts { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.finance-opts li { display: flex; align-items: center; gap: 10px; font-size: 14px; font-family: var(--font-mono); letter-spacing: 0.04em; }
.finance-opts li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 6px var(--amber); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { display: grid; gap: 10px; max-width: 820px; margin: 0 auto; }
.faq-item {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}
.faq-q {
  width: 100%; text-align: left; padding: 18px 22px;
  background: transparent; border: none; color: var(--text);
  display: flex; align-items: center; gap: 14px;
  font-size: 16px; font-family: var(--font-body); font-weight: 500;
}
.faq-q::after {
  content: "+"; margin-left: auto; font-family: var(--font-mono);
  color: var(--cyan); font-size: 20px; transition: transform .2s;
}
.faq-item[open] .faq-q::after { content: "–"; }
.faq-a {
  padding: 0 22px 18px 22px; color: var(--text-body); font-size: 14px;
  max-width: 720px;
}

/* ============================================================
   STICKY DESIGN TAB
   ============================================================ */
.sticky-tab {
  position: fixed; right: 0; top: 50%;
  transform: translateY(-50%) translateX(-2px);
  z-index: 30;
  display: flex;
}
.sticky-tab button {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  padding: 18px 10px;
  background: linear-gradient(180deg, var(--cyan), var(--blue));
  color: #03131A;
  font-family: var(--font-body); font-weight: 600;
  font-size: 13px; letter-spacing: 0.1em;
  border: none;
  border-radius: 10px 0 0 10px;
  box-shadow: -6px 0 20px -4px rgba(34,211,238,0.5);
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
}
.sticky-tab button:hover { transform: rotate(180deg) translateY(4px); box-shadow: -8px 0 28px -4px rgba(34,211,238,0.7); }
@media (max-width: 768px) { .sticky-tab { display: none; } }

/* ============================================================
   FOOTER / CALLBACK
   ============================================================ */
.footer { padding: 64px 0 40px; border-top: 1px solid var(--border); margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .footer-grid { grid-template-columns: 1fr; } }
.footer h4 { font-size: 12px; font-family: var(--font-mono); letter-spacing: 0.16em; color: var(--text-muted); text-transform: uppercase; margin-bottom: 16px; font-weight: 500; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer a { color: var(--text-body); font-size: 14px; }
.footer a:hover { color: var(--cyan); }

.callback-form {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
}
.callback-form label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; color: var(--text-muted); text-transform: uppercase; }
.callback-form input {
  width: 100%; background: rgba(0,0,0,0.3); border: 1px solid var(--border);
  color: var(--text); padding: 10px 12px; border-radius: var(--r-sm);
  margin-top: 6px; margin-bottom: 14px; font-family: var(--font-body); font-size: 14px;
  outline: none; transition: border-color .15s;
}
.callback-form input:focus { border-color: var(--cyan); }
.callback-form .btn-primary { width: 100%; justify-content: center; }

.legal {
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 11px; color: var(--text-muted); letter-spacing: 0.06em;
}

/* ============================================================
   Utility
   ============================================================ */
.mono { font-family: var(--font-mono); }
.muted { color: var(--text-muted); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .hud-card, .ring-card { opacity: 1 !important; transform: none !important; animation: none !important; }
}
