/* ============================
   MAIN — Ilumitec Solar
   ============================ */

/* ─── Section Header ─────────────────── */
.section-header {
  max-width: 720px;
  margin: 0 auto var(--spacing-12);
  text-align: center;
}
.section-header .heading-lg,
.section-header .heading-md { margin-bottom: var(--spacing-3); }
.section-header .badge { margin-bottom: var(--spacing-4); }


/* ─── Navbar ─────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  background: var(--gradient-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  transition: box-shadow var(--transition-base), height var(--transition-base);
  box-shadow: var(--shadow-glass);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 96px; /* Slightly taller for breathability */
  transition: height var(--transition-base);
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  letter-spacing: -0.02em;
}
.navbar-logo { height: 48px; width: auto; }

.navbar-nav {
  display: flex;
  gap: var(--spacing-10); /* Increased spacing for premium feel */
  align-items: center;
}

.nav-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-body);
  position: relative;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}
.nav-link:hover { color: var(--color-primary-dark); }
.nav-link:hover::after { width: 100%; }

.navbar-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--color-text-main);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
}

@media (max-width: 768px) {
  .navbar-nav {
    display: none;
    position: absolute;
    top: 88px;
    left: 0;
    width: 100%;
    background-color: var(--color-surface);
    flex-direction: column;
    padding: var(--spacing-6) var(--spacing-6) var(--spacing-8);
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-5);
  }
  .navbar-nav.active { display: flex; }
  .navbar-toggle { display: block; }
}


/* ─── Hero ───────────────────────────── */
.hero {
  padding-top: 160px;
  padding-bottom: var(--spacing-20);
  background: radial-gradient(circle at center top, #e0f2fe 0%, var(--color-bg-main) 70%);
  position: relative;
  overflow: hidden;
}

/* Subtle colour glow blobs for depth */
.hero::before {
  content: '';
  position: absolute;
  top: 10%; right: 5%;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.12;
  filter: blur(100px);
  z-index: 0;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -150px; left: -100px;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.10;
  filter: blur(90px);
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-right: var(--spacing-8);
}

/* Deep Premium Entrance Animations */
@keyframes fadeUpEntrance {
  0% { opacity: 0; transform: translateY(30px) scale(0.98); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}
.hero-content > * {
  opacity: 0;
  animation: fadeUpEntrance 0.8s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
}
.hero-content .badge { animation-delay: 0.1s; }
.hero-content .heading-xl { animation-delay: 0.2s; }
.hero-content .text-lead { animation-delay: 0.35s; }
.hero-content .hero-actions { animation-delay: 0.5s; }

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  box-shadow: 0 35px 60px -15px rgba(0, 0, 0, 0.2), 0 15px 35px -10px rgba(0, 0, 0, 0.1);
  aspect-ratio: 4 / 3;
  z-index: 2;
  background: transparent;
}


/* ─── Decorative elements ────────────── */
.deco-dots {
  position: absolute;
  width: 180px; height: 180px;
  background-image: radial-gradient(var(--color-primary) 2px, transparent 2px);
  background-size: 20px 20px;
  z-index: 0;
  pointer-events: none;
  opacity: 0.25;
}
.deco-circle-line {
  position: absolute;
  width: 280px; height: 280px;
  border: 1px dashed var(--color-border);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}
.deco-square-outline {
  position: absolute;
  width: 220px; height: 220px;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transform: rotate(15deg);
  z-index: 0;
  pointer-events: none;
}
.deco-circle-filled {
  position: absolute;
  width: 360px; height: 360px;
  border-radius: 50%;
  background-color: var(--color-primary-subtle);
  opacity: 0.5;
  z-index: 0;
  pointer-events: none;
}

.relative { position: relative; }
.z-10 { z-index: 10; }


/* ─── Steps (How It Works) ───────────── */
.step-item {
  position: relative;
  padding-left: var(--spacing-12);
  margin-bottom: var(--spacing-8);
}
.step-number {
  position: absolute;
  left: 0; top: 0;
  width: 38px; height: 38px;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  box-shadow: var(--shadow-primary-btn);
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
  }
  .step-item {
    padding-left: 0;
    text-align: center;
    margin-bottom: 0;
  }
  .step-number {
    position: relative;
    margin: 0 auto var(--spacing-5);
    width: 60px; height: 60px;
    font-size: 1.375rem;
  }
  /* Connector lines */
  .step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 30px;
    left: calc(50% + 30px);
    width: calc(100% - 60px);
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), transparent);
    z-index: -1;
  }
}


/* ─── Testimonial ────────────────────── */
.testimonial-card {
  padding: var(--spacing-10) var(--spacing-8);
  background: linear-gradient(135deg, var(--color-surface), var(--color-bg-alt));
}
.testimonial-card p {
  font-style: italic;
  position: relative;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-body);
  z-index: 1;
}
.testimonial-card p::before {
  content: '"';
  font-family: Georgia, serif;
  font-size: 4.5rem;
  color: var(--color-primary-light);
  position: absolute;
  top: -2rem; left: -0.75rem;
  z-index: -1;
  line-height: 1;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin-top: var(--spacing-5);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-5);
}
.testimonial-avatar {
  width: 52px; height: 52px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary-dark);
}


/* ─── Value (CTA Inset Card) ─────────── */
.value-section {
  position: relative;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-16) var(--spacing-8);
  margin-top: calc(var(--spacing-12) * -1);
  z-index: 10;
  border: 1px solid var(--color-border);
}


/* ─── Footer ─────────────────────────── */
.footer {
  background-color: var(--color-section-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-24) 0 var(--spacing-10);
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}
.footer-col h4 {
  color: #e2e8f0;
  margin-bottom: var(--spacing-5);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.footer-links li { margin-bottom: var(--spacing-3); }
.footer-links a {
  color: #64748b;
  font-weight: 500;
  transition: color var(--transition-fast);
  font-size: 0.9375rem;
}
.footer-links a:hover { color: var(--color-accent); }

.footer-bottom {
  margin-top: var(--spacing-16);
  padding-top: var(--spacing-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  color: #475569;
  font-size: 0.875rem;
}


/* ─── Animations ─────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

/* Calculator result reveal */
#calc-result, #panel-result {
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* ─── Scroll-triggered Fade-Up ────────── */
.fade-up,
.section-header,
.card,
.accordion,
.step-item,
.testimonial-card,
.solution-card {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.is-visible,
.section-header.is-visible,
.card.is-visible,
.accordion.is-visible,
.step-item.is-visible,
.testimonial-card.is-visible,
.solution-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Respect user preference */
@media (prefers-reduced-motion: reduce) {
  .fade-up, .section-header, .card, .accordion,
  .step-item, .testimonial-card, .solution-card {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ─── Sticky WhatsApp CTA Bar ─────────── */
#sticky-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 900;
  transform: translateY(100%);
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

#sticky-cta-bar.sticky-cta-visible {
  transform: translateY(0);
  pointer-events: all;
}

.sticky-cta-inner {
  background: var(--color-section-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.sticky-cta-inner p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  font-weight: 500;
  margin: 0;
}

@media (max-width: 480px) {
  .sticky-cta-inner { padding: 10px 16px; gap: var(--spacing-3); }
  .sticky-cta-inner p { font-size: 0.8rem; }
}