/* hero image and title */
.hero {
  position: relative;
  width: 100%;
  height: 98vh;
  min-height: 98vh;
  overflow: hidden;
  background: var(--bg-dark);
}

.hero-image {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.8;
}

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

.hero-words {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 33%;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  padding-left: 2rem;
  padding-right: 2rem;
  /* Below fixed nav: safe area + nav offset + vertical padding + logo row */
  padding-top: calc(
    env(safe-area-inset-top, 0px) + 1.2rem + 1.4rem + 3.5rem + 1.4rem + 2.8rem
  );
  padding-bottom: 1rem;
  box-sizing: border-box;
}

.hero-words img {
  width: auto;
  height: 8rem;
}

.hero-title {
  font-family: var(--serif);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--text-light);
  text-shadow: -0.5rem 0 1rem rgba(0, 0, 0, 0.8);
  margin-bottom: 0.5rem;
}

.hero-paragraph {
  max-width: 42ch;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  color: var(--text-light);
  text-shadow: -0.5rem 0 1rem rgba(0, 0, 0, 0.8);
  font-weight: var(--font-weight-semibold);
}

.hero-buttons{
  display: flex;
  flex-direction: row;
  gap: 2.5rem;
  margin-top: 2.8rem;
  justify-content: center;
}

.etp {
  padding: 1.4rem 2.8rem;
  color: var(--text-primary);
  background: var(--sun);
  border-radius: 0.5rem;
  font-family: var(--sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-decoration: none;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 2px solid var(--sun);
  box-shadow: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.etp::before { content: none; }

.etp:hover {
  background: var(--sun-bronze);
  border-color: var(--sun-bronze);
  transform: none;
  box-shadow: none;
}

.etp:active {
  background: var(--sun-dark);
  transform: none;
  box-shadow: none;
}

.rtr {
  padding: 1.4rem 2.8rem;
  color: var(--text-primary);
  background: var(--skylight-blue);
  border-radius: 0.5rem;
  font-family: var(--sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-decoration: none;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 2px solid var(--skylight-blue);
  box-shadow: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.rtr::before { content: none; }

.rtr:hover {
  background: var(--skylight-blue-lighter);
  border-color: var(--skylight-blue-lighter);
  color: var(--text-primary);
  transform: none;
  box-shadow: none;
}

.rtr:active {
  background: var(--sky-dark);
  transform: none;
  box-shadow: none;
}
/* quick turotial of solar air heating */

.wis {
    background: var(--warm-white);
    padding: 7rem 2rem 6rem;
    border-bottom: 1px solid var(--gray-200);
  }
  .wis-inner {
    max-width: 110rem;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
  }
  .wis-eyebrow {
    font-family: var(--sans);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-wider);
    text-transform: uppercase;
    color: var(--sky-dark);
    margin-bottom: 1.2rem;
  }
  .wis-heading {
    font-family: var(--serif);
    font-size: clamp(2.8rem, 4vw, 4.4rem);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
    margin-bottom: 2.4rem;
    letter-spacing: var(--letter-spacing-tight);
  }
  .wis-body p {
    font-family: var(--sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-loose);
    color: var(--text-secondary);
    margin-bottom: 1.6rem;
  }
  .wis-body p:last-child { margin-bottom: 0; }
  .wis-image-wrap {
    width: 100%;
    border-radius: 1.4rem;
    overflow: hidden;
    box-shadow: 0 0.8rem 3rem rgba(15, 50, 70, 0.12);
  }
  .wis-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }
  .wis-image-caption {
    margin-top: 1.2rem;
    font-family: var(--sans);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: center;
    letter-spacing: var(--letter-spacing-normal);
  }
  .wis-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    margin-top: 2.4rem;
  }
  .wis-step {
    background: var(--bg-white);
    border: 1px solid var(--gray-200);
    border-radius: 1rem;
    padding: 1.6rem 1.4rem;
    text-align: center;
  }
  .wis-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sun) 0%, var(--sunlight-yellow) 100%);
    color: var(--text-primary);
    font-family: var(--serif);
    font-size: 1.6rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.8rem;
  }
  .wis-step p {
    font-family: var(--sans);
    font-size: 1.1rem;
    line-height: var(--line-height-normal);
    color: var(--text-secondary);
    margin: 0;
  }
  @media (max-width: 768px) {
    .wis-inner { grid-template-columns: 1fr; gap: 4rem; }
    .wis-steps { grid-template-columns: 1fr; }
  }

  /* stats */

  .stats {
    background: var(--text-primary);
    padding: 5rem 2rem;
  }
  .stats-inner {
    max-width: 110rem;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  .stats-item {
    text-align: center;
    padding: 2rem 3rem;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
  }
  .stats-item:last-child {
    border-right: none;
  }
  .stats-number {
    font-family: var(--serif);
    font-size: clamp(3.6rem, 5vw, 5.6rem);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    color: var(--sun);
    margin-bottom: 0.8rem;
    letter-spacing: var(--letter-spacing-tight);
  }
  .stats-label {
    font-family: var(--sans);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    color: rgba(250, 246, 238, 0.75);
    max-width: 18ch;
    margin: 0 auto;
  }
  @media (max-width: 768px) {
    .stats-inner {
      grid-template-columns: repeat(2, 1fr);
    }
    .stats-item:nth-child(2) {
      border-right: none;
    }
    .stats-item:nth-child(1),
    .stats-item:nth-child(2) {
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
  }

/* slideshow — compact card under hero, skylight panel + faint images */
.solar-slideshow {
  position: relative;
  width: 100%;
  overflow-x: hidden;
  padding: 2rem 0rem 4.8rem;
  background: linear-gradient(
    165deg,
    var(--skylight-blue-muted) 0%,
    var(--skylight-blue) 42%,
    var(--sky-lighter) 100%
  );
}

.ss-title {
  font-family: var(--serif);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 2rem;
  letter-spacing: var(--letter-spacing-tight);
}

.ss-stage {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
  height: clamp(35rem, 60vh, 50rem);
  border-radius: 1.4rem;
  overflow: visible;
  background: var(--bg-blue);
}

.ss-triptych {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.35fr) minmax(0, 1fr);
  align-items: center;
  height: 100%;
  padding: 0 0.4rem;
  isolation: isolate;
}

.ss-flank {
  position: relative;
  height: 86%;
  max-height: 26rem;
  border-radius: 1rem;
  overflow: hidden;
  opacity: 0.46;
  z-index: 0;
  transform: scale(0.9);
  transform-origin: center center;
  pointer-events: none;
  box-shadow: 0 0.4rem 1.2rem rgba(15, 80, 110, 0.12);
}

.ss-flank--left {
  justify-self: end;
  width: 100%;
  margin-right: -18%;
}

.ss-flank--right {
  justify-self: start;
  width: 100%;
  margin-left: -18%;
}

.ss-flank-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.ss-main-column {
  position: relative;
  z-index: 2;
  height: 100%;
  min-width: 0;
  border-radius: 1.4rem;
  overflow: hidden;
  background: var(--bg-blue);
  box-shadow:
    0 0.6rem 2rem rgba(15, 50, 70, 0.22),
    0 0.15rem 0 rgba(255, 255, 255, 0.35) inset;
}

.ss-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.ss-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 450ms ease;
  pointer-events: none;
  display: flex;
  flex-direction: column;
}

.ss-slide.is-active {
  opacity: 1;
}

.ss-slide img {
  flex: 1;
  width: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.22;
}

.ss-slide.is-active img {
  opacity: 1;
}

.ss-slide::after {
  content: none;
}

.ss-slide [role='group'] {
  padding: 1.4rem 1.8rem 1.6rem;
  text-align: center;
  background-color: var(--bg-blue-light);
}

.ss-slide [role='group'] p {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  margin: 0 0 0.6rem;
  font-weight: var(--font-weight-medium);
}

.ss-slide [role='group'] p:last-child {
  margin-bottom: 0;
}

.ss-slide [role='group'] span {
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--text-secondary);
}

.ss-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3.8rem;
  height: 3.8rem;
  border: none;
  border-radius: 50%;
  background: rgba(30, 61, 71, 0.38);
  color: var(--white);
  font-size: 2.2rem;
  line-height: 1;
  cursor: pointer;
  z-index: 10;
  transition: background 0.2s ease;
}

.ss-arrow:hover {
  background: rgba(30, 61, 71, 0.55);
}

.ss-prev {
  left: 1rem;
}

.ss-next {
  right: 1rem;
}

.ss-pause-indicator {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    z-index: 20;
    width: 3.2rem;
    height: 3.2rem;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.38);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
  }
 
  /* Show when slideshow stage is hovered or focused */
  .ss-stage:hover .ss-pause-indicator,
  .ss-stage:focus-within .ss-pause-indicator {
    opacity: 1;
  }
 
  /* Pause icon: two vertical bars */
  .ss-pause-indicator::before,
  .ss-pause-indicator::after {
    content: '';
    display: block;
    width: 0.3rem;
    height: 1.1rem;
    background: #ffffff;
    border-radius: 0.2rem;
  }
  .ss-pause-indicator::before { margin-right: 0.35rem; }
 
  /* Play icon state (triangle) — toggled via .is-playing class on indicator */
  .ss-pause-indicator.is-playing::before,
  .ss-pause-indicator.is-playing::after {
    content: none;
  }
  .ss-pause-indicator.is-playing {
    /* CSS-only triangle pointing right */
    border-left: 1.1rem solid #ffffff;
    border-top: 0.7rem solid transparent;
    border-bottom: 0.7rem solid transparent;
    border-radius: 0;
    background: transparent;
    width: 0;
    height: 0;
    margin-left: 0.3rem;
    /* keep the outer circle via box-shadow ring */
    box-shadow: -0.8rem -0.8rem 0 0.8rem rgba(0, 0, 0, 0.38);
    border-radius: 50%;
  }

/* ── Slideshow dot indicators ─────────────────── */
.ss-dots {
  display: flex;
  justify-content: center;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.ss-dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  border: none;
  background: rgba(30, 61, 71, 0.22);
  cursor: pointer;
  padding: 0;
  transition: background 0.25s ease, transform 0.25s ease;
}

.ss-dot:hover {
  background: rgba(30, 61, 71, 0.48);
}

.ss-dot.is-active {
  background: var(--text-primary);
  transform: scale(1.4);
}

/* showcase */
.showcase {
    background: var(--bg-white);
    padding: 7rem 2rem;
  }
  .showcase-inner {
    max-width: 110rem;
    margin: 0 auto;
  }
  .showcase-eyebrow {
    font-family: var(--sans);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-wider);
    text-transform: uppercase;
    color: var(--sky-dark);
    text-align: center;
    margin-bottom: 1.2rem;
  }
  .showcase-section-title {
    font-family: var(--serif);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 4.8rem;
    letter-spacing: var(--letter-spacing-tight);
  }
  .showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.4rem;
  }
  .showcase-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    border: 1px solid var(--gray-200);
    border-radius: 1.4rem;
    overflow: hidden;
    text-decoration: none;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  }
  .showcase-card:hover {
    transform: translateY(-0.4rem);
    box-shadow: 0 1.2rem 3.6rem rgba(15, 50, 70, 0.12);
    border-color: var(--skylight-blue);
  }
  .showcase-card-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
  }
  .showcase-card-body {
    padding: 2.4rem 2.4rem 2rem;
    display: flex;
    flex-direction: column;
    flex: 1;
  }
  .showcase-card-title {
    font-family: var(--serif);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
    margin-bottom: 1.2rem;
  }
  .showcase-card-text {
    font-family: var(--sans);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    flex: 1;
  }
  .showcase-card-link {
    font-family: var(--sans);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-wide);
    text-transform: uppercase;
    color: var(--sky-dark);
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    transition: gap 0.2s ease;
  }
  .showcase-card:hover .showcase-card-link {
    gap: 1rem;
  }
  @media (max-width: 900px) {
    .showcase-grid { grid-template-columns: 1fr; }
  }