/* NCA Design — Apple-inspired CSS */
:root {
  --black: #000000;
  --dark: #1d1d1f;
  --mid: #6e6e73;
  --light: #f5f5f7;
  --white: #ffffff;
  --accent: #d4a017;
  --accent-light: #f5c842;
  --radius: 18px;
  --nav-h: 64px;
  --transition: 0.35s cubic-bezier(.4,0,.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif; background: var(--white); color: var(--dark); -webkit-font-smoothing: antialiased; }

/* NAV */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: var(--nav-h); background: rgba(0,0,0,0.85); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; padding: 0 32px; }
.nav-inner { width: 100%; max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.nav-logo img { height: 32px; width: auto; }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 13px; font-weight: 400; letter-spacing: 0.02em; transition: color var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-cta { background: var(--accent); color: var(--black) !important; padding: 8px 18px; border-radius: 100px; font-weight: 600 !important; }
.nav-cta:hover { background: var(--accent-light) !important; }
.nav-burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--white); transition: all var(--transition); border-radius: 2px; }

/* HERO */
.hero { min-height: 84vh; background: var(--black); display: flex; align-items: center; justify-content: center; text-align: center; padding: calc(var(--nav-h) + 40px) 32px 50px; position: relative; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0.35; filter: brightness(0.6); }
.hero-content { position: relative; z-index: 1; max-width: 860px; }
.hero-eyebrow { font-size: 12px; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.hero h1 { font-size: clamp(44px, 7vw, 88px); font-weight: 700; line-height: 1.05; color: var(--white); letter-spacing: -0.03em; margin-bottom: 24px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { font-size: clamp(16px, 2.2vw, 21px); color: rgba(255,255,255,0.7); line-height: 1.6; margin-bottom: 44px; max-width: 620px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 16px 32px; border-radius: 100px; font-size: 15px; font-weight: 600; text-decoration: none; transition: all var(--transition); cursor: pointer; border: none; font-family: inherit; }
.btn-primary { background: var(--white); color: var(--black); }
.btn-primary:hover { background: var(--light); transform: scale(1.02); }
.btn-outline { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.08); }
.btn-dark { background: var(--dark); color: var(--white); }
.btn-dark:hover { background: #2d2d2f; transform: scale(1.02); }
.btn-accent { background: var(--accent); color: var(--black); }
.btn-accent:hover { background: var(--accent-light); transform: scale(1.02); }

/* SECTIONS */
section { padding: 100px 32px; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-eyebrow { font-size: 11px; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; color: var(--mid); margin-bottom: 16px; }
.section-title { font-size: clamp(32px, 4.5vw, 56px); font-weight: 700; line-height: 1.1; letter-spacing: -0.025em; color: var(--dark); margin-bottom: 20px; }
.section-subtitle { font-size: clamp(16px, 1.8vw, 19px); color: var(--mid); line-height: 1.6; max-width: 600px; }
.center { text-align: center; }
.center .section-subtitle { margin: 0 auto; }

/* SERVICE CARDS */
.services { background: var(--light); }
.service-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 60px; }
.card { background: var(--white); border-radius: var(--radius); overflow: hidden; transition: transform var(--transition), box-shadow var(--transition); }
.card:hover { transform: translateY(-6px); box-shadow: 0 24px 60px rgba(0,0,0,0.10); }
.card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
.card-body { padding: 28px 28px 32px; }
.card-logo { height: 40px; margin-bottom: 16px; }
.card-title { font-size: 20px; font-weight: 700; color: var(--dark); margin-bottom: 12px; letter-spacing: -0.01em; }
.card-text { font-size: 15px; color: var(--mid); line-height: 1.65; margin-bottom: 24px; }
.card-link { font-size: 14px; font-weight: 600; color: var(--accent); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; transition: gap var(--transition); }
.card-link:hover { gap: 10px; }

/* SPLIT */
.story { background: var(--white); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.split-img { border-radius: var(--radius); width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.split-text .section-title { margin-bottom: 24px; }
.split-text p { font-size: 16px; color: var(--mid); line-height: 1.75; margin-bottom: 16px; }

/* DARK SECTION */
.diff { background: var(--dark); color: var(--white); }
.diff .section-eyebrow { color: var(--accent); }
.diff .section-title { color: var(--white); }
.diff-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 60px; }
.diff-item { text-align: center; padding: 40px 24px; }
.diff-icon { font-size: 40px; margin-bottom: 20px; display: block; }
.diff-item h3 { font-size: 18px; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.diff-item p { font-size: 15px; color: rgba(255,255,255,0.6); line-height: 1.65; }

/* CONTACT */
.contact { background: var(--light); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 60px; align-items: start; }
.contact-info p { font-size: 15px; color: var(--mid); line-height: 1.8; margin-bottom: 24px; }
.contact-detail { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; font-size: 15px; color: var(--dark); }
.contact-detail span:first-child { font-size: 20px; flex-shrink: 0; }
.contact-form { background: var(--white); border-radius: var(--radius); padding: 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--mid); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 14px 16px; border: 1.5px solid #e0e0e5; border-radius: 10px; font-size: 15px; font-family: inherit; color: var(--dark); background: var(--white); transition: border-color var(--transition); outline: none; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--dark); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* FOOTER */
footer { background: var(--black); color: rgba(255,255,255,0.6); padding: 60px 32px 40px; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand img { height: 28px; margin-bottom: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.7; max-width: 240px; }
.footer-col h4 { font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.4); margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(255,255,255,0.6); text-decoration: none; font-size: 13px; transition: color var(--transition); }
.footer-col ul a:hover { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 32px; font-size: 12px; }
.footer-social { display: flex; gap: 16px; }
.footer-social a { color: rgba(255,255,255,0.5); text-decoration: none; font-size: 20px; transition: color var(--transition); }
.footer-social a:hover { color: var(--white); }

/* PAGE HERO */
.page-hero { min-height: 60vh; background: var(--black); display: flex; align-items: flex-end; padding: calc(var(--nav-h) + 80px) 32px 80px; position: relative; overflow: hidden; }
.page-hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0.3; }
.page-hero-content { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; width: 100%; }
.page-hero h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 700; color: var(--white); letter-spacing: -0.03em; line-height: 1.08; max-width: 700px; }
.page-hero p { font-size: 18px; color: rgba(255,255,255,0.65); margin-top: 20px; max-width: 540px; line-height: 1.65; }

/* FEATURES */
.features-list { list-style: none; margin-top: 24px; }
.features-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--mid); margin-bottom: 12px; line-height: 1.5; }
.features-list li::before { content: "✓"; color: var(--accent); font-weight: 700; font-size: 14px; margin-top: 1px; flex-shrink: 0; }

/* STATS */
.stats { background: var(--dark); padding: 60px 32px; }
.stats-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-number { font-size: clamp(36px, 5vw, 56px); font-weight: 700; color: var(--white); letter-spacing: -0.03em; }
.stat-number em { color: var(--accent); font-style: normal; }
.stat-label { font-size: 13px; color: rgba(255,255,255,0.55); margin-top: 8px; letter-spacing: 0.05em; text-transform: uppercase; }

/* CTA BAND */
.cta-band { background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%); padding: 80px 32px; text-align: center; border-top: 1px solid #222; }
.cta-band h2 { font-size: clamp(28px, 4vw, 48px); font-weight: 700; color: var(--white); letter-spacing: -0.025em; margin-bottom: 16px; }
.cta-band p { font-size: 17px; color: rgba(255,255,255,0.6); margin-bottom: 36px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* GALLERY */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 48px; }
.gallery img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 12px; transition: transform var(--transition); }
.gallery img:hover { transform: scale(1.02); }

/* FAQ */
.faq-cats { display: flex; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.faq-cat { padding: 8px 20px; border-radius: 100px; font-size: 13px; font-weight: 600; cursor: pointer; border: 1.5px solid #e0e0e5; color: var(--mid); background: var(--white); transition: all var(--transition); }
.faq-cat.active, .faq-cat:hover { background: var(--dark); color: var(--white); border-color: var(--dark); }
.faq-item { border-bottom: 1px solid #e0e0e5; padding: 28px 0; }
.faq-item:first-child { border-top: 1px solid #e0e0e5; }
.faq-q { font-size: 17px; font-weight: 600; color: var(--dark); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px; user-select: none; }
.faq-q::after { content: "+"; font-size: 22px; font-weight: 300; color: var(--mid); flex-shrink: 0; transition: transform var(--transition); }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a { font-size: 15px; color: var(--mid); line-height: 1.75; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding var(--transition); }
.faq-item.open .faq-a { max-height: 400px; padding-top: 16px; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .service-cards { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: fixed; top: var(--nav-h); left: 0; right: 0; background: rgba(0,0,0,0.97); padding: 24px 32px; gap: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); z-index: 999; }
  .nav-links a { font-size: 17px; }
  .nav-burger { display: flex; }
  .nav-cta { display: none !important; }
}
@media (max-width: 640px) {
  nav { padding: 0 20px; }
  section { padding: 72px 20px; }
  .diff-grid, .footer-top { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .form-row, .gallery { grid-template-columns: 1fr; }
}

/* Solar Highlight Section */
.solar-highlight { background: var(--light); }
.split-reverse { }
@media (min-width: 769px) {
  .split-reverse .split-img { ord