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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #111;
  line-height: 1.6;
  background: #fff
}

img {
  max-width: 100%;
  display: block
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px 60px
}

.hero {
  position: relative;
  margin: 16px 0 40px;
  border-radius: 18px;
  overflow: hidden;
  color: #fff;
  text-align: center;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  background-image: url("images/battery-cabinet-closeup.jpg")
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, .75), rgba(0, 0, 0, .35))
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 40px 20px;
  max-width: 720px
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  margin-bottom: 10px
}

.hero-sub {
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  margin-bottom: 24px;
  opacity: .9
}

.hero-cta {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center
}

.btn {
  border-radius: 999px;
  padding: 12px 26px;
  font-weight: 600;
  font-size: .95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: .15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px
}

.btn-primary {
  background: #fff;
  color: #111;
  box-shadow: 0 10px 25px rgba(0, 0, 0, .25)
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, .3)
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .4)
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, .08)
}

.metrics {
  text-align: center;
  margin-bottom: 48px
}

.section-title {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 24px
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px
}

@media(min-width:768px) {
  .metrics-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr))
  }
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 700
}

.metric-label {
  font-size: .9rem;
  color: #555
}

.timeline {
  margin-bottom: 56px
}

.timeline-item {
  margin-bottom: 22px
}

.timeline-year {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 4px
}

.timeline-text {
  font-size: .95rem;
  color: #444
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  margin-bottom: 56px
}

@media(min-width:768px) {
  .split {
    grid-template-columns: minmax(0, 1.1fr)minmax(0, 1fr)
  }

  .split.reverse {
    grid-template-columns: minmax(0, 1fr)minmax(0, 1.1fr)
  }

  .split.reverse>:first-child {
    order: 2
  }

  .split.reverse>:last-child {
    order: 1
  }
}

.split-image {
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .18)
}

.split-text-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 10px
}

.split-text-body {
  font-size: .98rem;
  color: #444;
  margin-bottom: 10px
}

.banner {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  margin-bottom: 56px;
  color: #fff;
  text-align: center;
  padding: 80px 20px;
  background-size: cover;
  background-position: center
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, .7), rgba(0, 0, 0, .35))
}

.banner-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto
}

.banner-title {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 12px
}

.banner-text {
  font-size: 1rem;
  opacity: .95
}

.banner-villa {
  background-image: url("images/villa-night-solar.jpg")
}

.banner-storm {
  background-image: url("images/stormy-city-lights.jpg")
}

.specs {
  margin-bottom: 56px
}

.specs-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  font-size: .96rem;
  color: #333
}

@media(min-width:640px) {
  .specs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr))
  }
}

.cta {
  border-radius: 18px;
  padding: 40px 24px;
  text-align: center;
  background: radial-gradient(circle at top left, #1dd1a1, #0a3d62);
  color: #fff;
  margin-bottom: 56px
}

.cta-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 10px
}

.cta-text {
  font-size: .98rem;
  margin-bottom: 20px;
  opacity: .95
}

.contact {
  max-width: 520px;
  margin: 0 auto 40px
}

.contact-title {
  text-align: center;
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 16px
}

.contact-field {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 12px;
  border-radius: 999px;
  border: 1px solid #ccc;
  font-size: .95rem
}

.contact-textarea {
  border-radius: 18px;
  min-height: 120px;
  resize: vertical
}

.contact-button {
  width: 100%;
  border-radius: 999px;
  padding: 13px 16px;
  border: none;
  background: #111;
  color: #fff;
  font-weight: 600;
  font-size: .98rem;
  cursor: pointer;
  transition: .15s
}

.contact-button:hover {
  background: #000;
  transform: translateY(-1px)
}

.footer {
  text-align: center;
  font-size: .8rem;
  color: #777;
  padding: 16px 0 0
}

.alert {
  padding: 15px;
  margin-bottom: 20px;
  border: 1px solid transparent;
  border-radius: 4px;
}

.alert-success {
  color: #3c763d;
  background-color: #dff0d8;
  border-color: #d6e9c6;
}

.alert-error {
  color: #a94442;
  background-color: #f2dede;
  border-color: #ebccd1;
}

.faq {
  margin-bottom: 56px;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 18px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.faq-item {
  margin-bottom: 20px;
  padding: 15px;
  border-bottom: 1px solid #ddd;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-size: 1.2rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 8px;
}

.faq-answer {
  font-size: 1rem;
  color: #555;
  line-height: 1.6;
}