/* ============================================================
   CSS Variables & Reset
   ============================================================ */
:root {
  --solar: #FFB000;
  --solar-dark: #E09900;
  --solar-light: #FFF3CD;
  --deep: #0F172A;
  --deep-mid: #1E293B;
  --green: #22C55E;
  --green-light: #DCFCE7;
  --white: #ffffff;
  --bg: #F8FAFC;
  --text: #1E293B;
  --text-mid: #475569;
  --text-light: #94A3B8;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.05);
  --transition: 0.28s cubic-bezier(.4,0,.2,1);
  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { border: none; cursor: pointer; background: none; font-family: inherit; }

/* ============================================================
   Utilities
   ============================================================ */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 88px 0; }
.section-alt { background: var(--bg); }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--solar-dark);
  background: var(--solar-light);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 14px;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--deep);
  line-height: 1.15;
  margin-bottom: 14px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-mid);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 700;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--solar);
  color: var(--deep);
}
.btn-primary:hover {
  background: var(--solar-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,176,0,.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,.4);
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.7);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: #25D366;
  color: var(--white);
}
.btn-whatsapp:hover {
  background: #1fb755;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,211,102,.35);
}

.btn-block { width: 100%; justify-content: center; }

/* ============================================================
   Navigation
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.navbar.scrolled {
  background: rgba(15,23,42,.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.18);
  padding: 10px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-family: var(--font-display);
}

.logo-icon {
  width: 38px; height: 38px;
  background: var(--solar);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  color: var(--deep);
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1;
}
.logo-text span { color: var(--solar); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  color: rgba(255,255,255,.8);
  font-size: .875rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover,
.nav-link.active { color: var(--white); }
.nav-link:hover { background: rgba(255,255,255,.08); }
.nav-link.active { color: var(--solar); }

.nav-link.nav-cta {
  background: var(--solar);
  color: var(--deep) !important;
  font-weight: 700;
  padding: 9px 18px;
}
.nav-link.nav-cta:hover {
  background: var(--solar-dark);
  transform: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  padding: 4px;
}
.hamburger span {
  display: block;
  height: 2.5px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F3460 100%);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,176,0,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,176,0,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 80px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--solar);
  margin-bottom: 20px;
}

.hero-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-heading .highlight {
  color: var(--solar);
  display: block;
}

.hero-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,.72);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}

.stat { text-align: center; }
.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--solar);
  line-height: 1;
}
.stat span {
  font-size: .78rem;
  color: rgba(255,255,255,.55);
  font-weight: 500;
  letter-spacing: .04em;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,.15);
}

/* Hero Visual */
.hero-visual { display: flex; justify-content: center; }

.hero-image-wrap {
  position: relative;
  width: 100%;
  max-width: 440px;
}

.hero-image-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
}

.hero-image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-image-placeholder p {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: 1rem;
  color: white;
  font-weight: 600;
  background: rgba(0,0,0,0.45);
  padding: 8px 16px;
  border-radius: 8px;
}

.badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(15,23,42,.9);
  border: 1px solid rgba(255,176,0,.3);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--white);
}
.badge i { color: var(--solar); }
.badge-savings { bottom: -16px; left: -16px; }
.badge-subsidy { top: 20px; right: -16px; }

.hero-wave {
  position: absolute;
  bottom: 0; left: 0; right: 0;
}
.hero-wave svg { display: block; width: 100%; height: 80px; }

/* ============================================================
   About
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
}

.about-image-placeholder p {
  font-size: .9rem;
  color: var(--text-mid);
  font-weight: 500;
}

.about-visual { position: relative; }
.about-tag {
  position: absolute;
  bottom: -16px; right: -16px;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 8px;
}

.about-content .section-eyebrow { display: inline-block; margin-bottom: 12px; }
.about-content .section-heading { text-align: left; margin-bottom: 16px; }
.about-content p { color: var(--text-mid); line-height: 1.8; margin-bottom: 14px; }

.about-pillars { margin-top: 28px; display: flex; flex-direction: column; gap: 16px; }

.pillar {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  border: 1px solid var(--border);
}
.pillar > i {
  font-size: 1.2rem;
  color: var(--solar);
  margin-top: 3px;
  flex-shrink: 0;
}
.pillar strong { display: block; font-family: var(--font-display); font-weight: 700; font-size: .9rem; color: var(--deep); }
.pillar span { font-size: .82rem; color: var(--text-mid); }

/* ============================================================
   Services
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--solar);
}

.service-icon {
  width: 52px; height: 52px;
  background: var(--solar-light);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: var(--solar-dark);
  margin-bottom: 20px;
  transition: background var(--transition);
}
.service-card:hover .service-icon { background: var(--solar); color: var(--deep); }

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 10px;
}
.service-card p { font-size: .88rem; color: var(--text-mid); line-height: 1.7; flex: 1; }

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--solar-dark);
  transition: gap var(--transition);
}
.service-card:hover .service-link { gap: 10px; }

/* ============================================================
   Why Choose Us
   ============================================================ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.why-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.why-icon {
  width: 48px; height: 48px;
  background: var(--deep);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  color: var(--solar);
  margin-bottom: 18px;
}

.why-card h4 {
  font-family: var(--font-display);
  font-size: .98rem;
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 8px;
}
.why-card p { font-size: .87rem; color: var(--text-mid); line-height: 1.7; }

/* ============================================================
   Process / How It Works
   ============================================================ */
.process-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  margin-top: 12px;
}

.process-line {
  position: absolute;
  top: 24px;
  left: calc(12.5% + 8px);
  right: calc(12.5% + 8px);
  height: 2px;
  background: linear-gradient(90deg, var(--solar) 0%, var(--green) 100%);
  z-index: 0;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 12px;
  position: relative;
  z-index: 1;
}

.step-bubble {
  width: 48px; height: 48px;
  background: var(--solar);
  color: var(--deep);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 0 0 6px var(--bg);
  flex-shrink: 0;
}

.step-content {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  width: 100%;
  margin-top: 0;
}

.step-icon {
  font-size: 1.6rem;
  color: var(--solar);
  margin-bottom: 10px;
  display: block;
}

.step-content h4 {
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 8px;
}
.step-content p { font-size: .83rem; color: var(--text-mid); line-height: 1.65; }

/* ============================================================
   Projects
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--white);
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.project-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.project-img-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--deep-mid), #0F3460);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 3rem;
  color: var(--solar);
  transition: transform var(--transition);
}
.project-card:hover .project-img-placeholder { transform: scale(1.06); }

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,.7) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover .project-overlay { opacity: 1; }
.project-overlay span {
  font-size: .8rem;
  font-weight: 600;
  color: var(--solar);
  font-family: var(--font-display);
  background: rgba(15,23,42,.7);
  padding: 4px 10px;
  border-radius: 100px;
}

.project-info {
  padding: 16px 18px;
}
.project-info h4 {
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 4px;
}
.project-info p { font-size: .82rem; color: var(--text-mid); display: flex; align-items: center; gap: 6px; }
.project-info i { color: var(--solar); font-size: .75rem; }

/* ============================================================
   Testimonials
   ============================================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.stars { color: var(--solar); font-size: .9rem; margin-bottom: 16px; letter-spacing: 2px; }

.testimonial-text {
  font-size: .9rem;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author { display: flex; align-items: center; gap: 12px; }

.author-avatar {
  width: 42px; height: 42px;
  background: var(--solar);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: .85rem;
  font-weight: 800;
  color: var(--deep);
  flex-shrink: 0;
}

.testimonial-author strong { display: block; font-size: .88rem; font-weight: 700; color: var(--deep); }
.testimonial-author span { font-size: .78rem; color: var(--text-light); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.open {
  border-color: var(--solar);
  box-shadow: 0 4px 16px rgba(255,176,0,.12);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 22px;
  text-align: left;
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 600;
  color: var(--deep);
  cursor: pointer;
  transition: background var(--transition);
  gap: 12px;
}
.faq-question:hover { background: var(--bg); }

.faq-icon {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--solar-light);
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem;
  color: var(--solar-dark);
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}
.faq-item.open .faq-icon {
  background: var(--solar);
  color: var(--deep);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s cubic-bezier(.4,0,.2,1), padding .3s ease;
  padding: 0 22px;
}
.faq-answer p { font-size: .9rem; color: var(--text-mid); line-height: 1.8; padding-bottom: 20px; }

/* ============================================================
   Contact
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  max-width: 900px;
  margin: 0 auto;
}

.contact-details { display: flex; flex-direction: column; gap: 20px; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px; height: 44px;
  background: var(--solar-light);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: var(--solar-dark);
  flex-shrink: 0;
}
.contact-icon.whatsapp-icon { background: var(--green-light); color: var(--green); }

.contact-item strong { display: block; font-size: .8rem; font-weight: 600; color: var(--text-light); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 4px; }
.contact-item a, .contact-item span { font-size: .95rem; color: var(--deep); font-weight: 500; }
.contact-item a:hover { color: var(--solar-dark); }

.contact-cta-card {
  background: var(--deep);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  color: var(--white);
}

.contact-sun-icon { font-size: 3rem; color: var(--solar); margin-bottom: 16px; display: block; }

.contact-cta-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.contact-cta-card p { color: rgba(255,255,255,.7); font-size: .9rem; line-height: 1.7; margin-bottom: 24px; }

.cta-checklist { text-align: left; display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.cta-checklist li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: rgba(255,255,255,.85);
}
.cta-checklist li i { color: var(--green); }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--deep);
  padding-top: 64px;
  color: rgba(255,255,255,.65);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: .875rem; line-height: 1.8; max-width: 300px; margin-bottom: 24px; }

.social-links { display: flex; gap: 10px; }
.social-links a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem;
  color: rgba(255,255,255,.6);
  transition: all var(--transition);
}
.social-links a:hover { border-color: var(--solar); color: var(--solar); }

.footer-links-col h5 {
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 18px;
}
.footer-links-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links-col a, .footer-links-col span {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer-links-col a:hover { color: var(--solar); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: .82rem; }

/* ============================================================
   Floating WhatsApp Button
   ============================================================ */
.float-wa {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 58px; height: 58px;
  background: #25D366;
  color: var(--white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.7rem;
  z-index: 900;
  box-shadow: 0 6px 24px rgba(37,211,102,.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.float-wa:hover { transform: scale(1.1); box-shadow: 0 10px 32px rgba(37,211,102,.5); }
.float-wa::before {
  content: '';
  position: absolute;
  width: 100%; height: 100%;
  border-radius: 50%;
  background: rgba(37,211,102,.45);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: .7; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ============================================================
   Back to Top Button
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 96px; right: 30px;
  width: 42px; height: 42px;
  background: var(--deep);
  color: var(--white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem;
  z-index: 900;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: all var(--transition);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
.back-to-top:hover { background: var(--solar); color: var(--deep); }

/* ============================================================
   Scroll Reveal Animations
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays for grid children */
.services-grid .reveal:nth-child(2) { transition-delay: .08s; }
.services-grid .reveal:nth-child(3) { transition-delay: .16s; }
.services-grid .reveal:nth-child(4) { transition-delay: .24s; }
.why-grid .reveal:nth-child(2) { transition-delay: .06s; }
.why-grid .reveal:nth-child(3) { transition-delay: .12s; }
.why-grid .reveal:nth-child(4) { transition-delay: .06s; }
.why-grid .reveal:nth-child(5) { transition-delay: .12s; }
.why-grid .reveal:nth-child(6) { transition-delay: .18s; }
.process-track .reveal:nth-child(2) { transition-delay: .1s; }
.process-track .reveal:nth-child(3) { transition-delay: .2s; }
.process-track .reveal:nth-child(4) { transition-delay: .3s; }
.projects-grid .reveal:nth-child(2) { transition-delay: .07s; }
.projects-grid .reveal:nth-child(3) { transition-delay: .14s; }
.projects-grid .reveal:nth-child(4) { transition-delay: .07s; }
.projects-grid .reveal:nth-child(5) { transition-delay: .14s; }
.projects-grid .reveal:nth-child(6) { transition-delay: .21s; }
.testimonials-grid .reveal:nth-child(2) { transition-delay: .1s; }
.testimonials-grid .reveal:nth-child(3) { transition-delay: .2s; }

/* ============================================================
   Responsive — Tablet (≤ 960px)
   ============================================================ */
@media (max-width: 960px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .process-track { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .process-line { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { max-width: 460px; margin: 0 auto; width: 100%; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { max-width: 400px; margin: 0 auto; width: 100%; }
  .contact-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Responsive — Mobile (≤ 640px)
   ============================================================ */
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }

  /* Nav */
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: min(80vw, 300px);
    height: 100vh;
    background: var(--deep);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 24px 32px;
    gap: 4px;
    transition: right var(--transition);
    z-index: 999;
    box-shadow: -8px 0 32px rgba(0,0,0,.25);
  }
  .nav-links.open { right: 0; }
  .nav-link { font-size: 1rem; padding: 12px 16px; width: 100%; }
  .nav-link.nav-cta { margin-top: 12px; text-align: center; justify-content: center; }

  /* Mobile overlay */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
  }
  .nav-overlay.visible { opacity: 1; pointer-events: all; }

  /* Hero */
  .hero-heading { font-size: 1.9rem; }
  .badge-savings { bottom: -12px; left: 8px; font-size: .74rem; }
  .badge-subsidy { top: 8px; right: 8px; font-size: .74rem; }

  /* Grids */
  .services-grid,
  .why-grid,
  .testimonials-grid,
  .projects-grid { grid-template-columns: 1fr; }

  .process-track { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }

  /* Float WA */
  .float-wa { bottom: 20px; right: 20px; width: 52px; height: 52px; font-size: 1.5rem; }
  .back-to-top { bottom: 82px; right: 20px; }
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-wa::before { animation: none; }
  * { transition-duration: .01ms !important; }
}

.logo-img {
  height: 62px;
  width: auto;
  object-fit: contain;
  display: block;
}

/* Slightly smaller on mobile */
@media (max-width: 640px) {
  .logo-img {
    height: 36px;
  }
}