/* AirWatt Home Performance — Marketing Site */
:root {
  --navy: #103F75;
  --navy-700: #0A2C57;
  --navy-900: #08223F;
  --green: #00A3AD;
  --green-600: #008C99;
  --green-50: #E6F7F8;  --lime: #99CC00;
  --gray-900: #1F2937;
  --gray-700: #374151;
  --gray-500: #6B7280;
  --gray-300: #D1D5DB;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --cream: #F7F8F5;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 2px rgba(13,47,102,0.06), 0 1px 3px rgba(13,47,102,0.08);
  --shadow-md: 0 4px 6px -1px rgba(13,47,102,0.10), 0 2px 4px -2px rgba(13,47,102,0.08);
  --shadow-lg: 0 20px 40px -12px rgba(13,47,102,0.20);
  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1200px;
  --font-display: 'Montserrat', system-ui, sans-serif;
  --font-body: 'Open Sans', system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  font-family: var(--font-body);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, .display { font-family: var(--font-display); font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; color: var(--navy); }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Brand wordmark */
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand .mark { width: 40px; height: 40px; flex-shrink: 0; }
.brand .mark img { width: 100%; height: 100%; object-fit: contain; display: block; }
.brand .word { font-family: var(--font-display); font-weight: 800; font-size: 1.4rem; line-height: 1; letter-spacing: -0.01em; }
.brand .word .home { color: var(--navy); }
.brand .word .sense { color: var(--green); }
.brand .tag { display: block; font-family: var(--font-display); font-weight: 600; font-size: 0.56rem; letter-spacing: 0.26em; color: var(--gray-500); margin-top: 3px; }
.brand.on-dark .word .home { color: var(--white); }
.brand.on-dark .tag { color: rgba(255,255,255,0.6); }
.brand.on-dark .mark img { filter: brightness(0) invert(1); }
@media (max-width: 560px) { .brand .word { font-size: 1.25rem; } .brand .mark { width: 34px; height: 34px; } }

section { position: relative; }
.eyebrow {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-600);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--green); display: inline-block; }
.section-pad { padding: clamp(64px, 8vw, 112px) 0; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow::before { display: none; }
.section-head h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin: 18px 0 14px; }
.section-head p { color: var(--gray-500); font-size: 1.05rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  padding: 14px 26px; border-radius: 999px; border: none; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
  text-align: center;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--green); color: var(--white); box-shadow: 0 8px 20px -8px rgba(0,163,173,0.7); }
.btn-primary:hover { background: var(--green-600); box-shadow: 0 12px 24px -8px rgba(0,163,173,0.8); }
.btn-navy { background: var(--navy); color: var(--white); }
.btn-navy:hover { background: var(--navy-700); }
.btn-outline { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: var(--white); }
.btn-ghost { background: transparent; color: var(--navy); border: 1.5px solid var(--gray-300); }
.btn-ghost:hover { border-color: var(--navy); background: var(--cream); }
.btn-lg { padding: 16px 32px; font-size: 1rem; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.header.scrolled { border-color: var(--gray-200); box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo img { height: 40px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-family: var(--font-display); font-weight: 500; font-size: 0.92rem; color: var(--gray-700); transition: color .15s ease; }
.nav-links a:hover { color: var(--navy); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--navy); }
.menu-btn svg { width: 26px; height: 26px; }

/* Hero */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  color: var(--white); overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: -2; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(8,28,64,0.92) 0%, rgba(13,47,102,0.82) 45%, rgba(13,47,102,0.45) 100%);
}
.hero-inner { max-width: 680px; padding: 80px 0; }
.hero .eyebrow { color: var(--green); }
.hero .eyebrow::before { background: var(--green); }
.hero h1 { color: var(--white); font-size: clamp(2.4rem, 5.2vw, 4rem); margin: 20px 0 22px; line-height: 1.08; }
.hero h1 .green { color: var(--green); }
.hero p.lead { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: rgba(255,255,255,0.9); margin-bottom: 34px; max-width: 560px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 28px; align-items: center; }
.hero-trust .item { display: flex; align-items: center; gap: 10px; font-size: 0.88rem; color: rgba(255,255,255,0.85); }
.hero-trust svg { width: 20px; height: 20px; color: var(--green); }

/* Stats bar */
.stats { background: var(--navy); color: var(--white); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 48px 0; text-align: center; }
.stat .num { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.8rem, 3vw, 2.6rem); color: var(--green); }
.stat .label { font-size: 0.86rem; color: rgba(255,255,255,0.8); margin-top: 6px; }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
  background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 32px 26px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  display: flex; flex-direction: column;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-icon {
  width: 52px; height: 52px; border-radius: 12px; background: var(--green-50);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.service-icon svg { width: 26px; height: 26px; color: var(--green-600); }
.service-card h3 { font-size: 1.18rem; margin-bottom: 6px; }
.service-card .desc { font-size: 0.93rem; color: var(--gray-500); margin-bottom: 18px; flex-grow: 1; }
.service-card .price { font-family: var(--font-display); font-weight: 700; font-size: 1.5rem; color: var(--navy); }
.service-card .price small { font-size: 0.8rem; font-weight: 500; color: var(--gray-500); }
.service-card .includes { list-style: none; margin: 18px 0 0; padding-top: 18px; border-top: 1px solid var(--gray-100); }
.service-card .includes li { font-size: 0.86rem; color: var(--gray-700); padding: 5px 0 5px 22px; position: relative; }
.service-card .includes li::before { content: ""; position: absolute; left: 0; top: 11px; width: 12px; height: 12px; background: var(--green-50); border-radius: 50%; }
.service-card .includes li svg { position: absolute; left: 2px; top: 11px; width: 8px; height: 8px; color: var(--green-600); }

/* Process */
.process { background: var(--cream); }
.process-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
.steps { display: flex; flex-direction: column; gap: 8px; }
.step { display: flex; gap: 22px; padding: 22px 0; border-bottom: 1px solid var(--gray-200); }
.step:last-child { border-bottom: none; }
.step-num {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%;
  background: var(--navy); color: var(--white); font-family: var(--font-display); font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
}
.step h3 { font-size: 1.12rem; margin-bottom: 5px; }
.step p { font-size: 0.93rem; color: var(--gray-500); }
.process-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 4/3; }
.process-img img { width: 100%; height: 100%; object-fit: cover; }

/* Plans */
.plans-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; align-items: stretch; }
.plan-card {
  background: var(--white); border: 1.5px solid var(--gray-200); border-radius: var(--radius);
  padding: 38px 30px; display: flex; flex-direction: column; position: relative;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.plan-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.plan-card.featured { border-color: var(--green); box-shadow: var(--shadow-lg); }
.plan-card.featured::before {
  content: "Most Popular"; position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--green); color: var(--white); font-family: var(--font-display); font-weight: 600;
  font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 6px 16px; border-radius: 999px;
}
.plan-card h3 { font-size: 1.35rem; }
.plan-card .tagline { font-size: 0.9rem; color: var(--gray-500); margin-bottom: 18px; }
.plan-card .price { font-family: var(--font-display); font-weight: 700; font-size: 2.4rem; color: var(--navy); }
.plan-card .price small { font-size: 0.95rem; font-weight: 500; color: var(--gray-500); }
.plan-card .features { list-style: none; margin: 24px 0 30px; flex-grow: 1; }
.plan-card .features li { font-size: 0.92rem; color: var(--gray-700); padding: 8px 0 8px 28px; position: relative; }
.plan-card .features li svg { position: absolute; left: 0; top: 11px; width: 18px; height: 18px; color: var(--green); }

/* Why / Benefits */
.why { background: var(--navy); color: var(--white); }
.why .section-head h2 { color: var(--white); }
.why .section-head p { color: rgba(255,255,255,0.8); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.benefit { padding: 30px 0; }
.benefit .icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(0,163,173,0.18); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.benefit .icon svg { width: 24px; height: 24px; color: var(--green); }
.benefit h3 { color: var(--white); font-size: 1.12rem; margin-bottom: 8px; }
.benefit p { color: rgba(255,255,255,0.78); font-size: 0.93rem; }

/* Area + About split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.area-card { background: var(--cream); border-radius: var(--radius); padding: 40px; }
.area-card h3 { font-size: 1.3rem; margin-bottom: 14px; }
.area-card p { color: var(--gray-700); font-size: 0.96rem; margin-bottom: 22px; }
.area-list { display: flex; flex-wrap: wrap; gap: 10px; }
.area-list span { background: var(--white); border: 1px solid var(--gray-200); border-radius: 999px; padding: 7px 16px; font-size: 0.85rem; color: var(--gray-700); }
.about-text h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 16px 0 18px; }
.about-text p { color: var(--gray-700); margin-bottom: 16px; font-size: 1rem; }
.about-text ul { list-style: none; margin: 22px 0; }
.about-text ul li { padding: 7px 0 7px 30px; position: relative; color: var(--gray-700); }
.about-text ul li svg { position: absolute; left: 0; top: 10px; width: 20px; height: 20px; color: var(--green); }

/* FAQ */
.faq { background: var(--cream); }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-sm); margin-bottom: 14px; overflow: hidden; }
.faq-q { width: 100%; text-align: left; background: none; border: none; cursor: pointer; padding: 22px 26px; font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--navy); display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-q .chev { flex-shrink: 0; width: 18px; height: 18px; transition: transform .2s ease; color: var(--green); }
.faq-item.open .faq-q .chev { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a-inner { padding: 0 26px 24px; color: var(--gray-700); font-size: 0.95rem; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: start; }
.contact-info h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 16px 0 18px; }
.contact-info p { color: var(--gray-500); margin-bottom: 28px; }
.contact-detail { display: flex; gap: 14px; align-items: center; margin-bottom: 18px; }
.contact-detail .icon { width: 42px; height: 42px; border-radius: 10px; background: var(--green-50); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-detail .icon svg { width: 20px; height: 20px; color: var(--green-600); }
.contact-detail .label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--gray-500); }
.contact-detail .val { font-family: var(--font-display); font-weight: 600; color: var(--navy); }
.form-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 38px; box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; font-family: var(--font-display); }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--gray-300); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.95rem; color: var(--gray-900); background: var(--white); transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(0,163,173,0.15); }
.field textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: 0.78rem; color: var(--gray-500); margin-top: 14px; }
.form-success { display: none; background: var(--green-50); border: 1px solid var(--green); border-radius: var(--radius-sm); padding: 16px; color: var(--green-600); font-weight: 600; margin-top: 16px; }
.form-success.show { display: block; }

/* CTA band */
.cta-band { background: linear-gradient(120deg, var(--navy) 0%, var(--navy-700) 100%); color: var(--white); text-align: center; }
.cta-band h2 { color: var(--white); font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,0.85); margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* Footer */
.footer { background: var(--navy-900); color: rgba(255,255,255,0.75); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand img { height: 44px; margin-bottom: 18px; }
.footer-brand p { font-size: 0.9rem; max-width: 280px; }
.footer h4 { color: var(--white); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 16px; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { font-size: 0.9rem; transition: color .15s ease; }
.footer ul a:hover { color: var(--green); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; gap: 16px; font-size: 0.82rem; flex-wrap: wrap; }
.footer-bottom .tag { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.05em; color: var(--green); }

/* Mobile menu overlay */
.mobile-menu { position: fixed; inset: 0; z-index: 200; background: var(--navy); display: flex; flex-direction: column; padding: 24px; transform: translateX(100%); transition: transform .3s cubic-bezier(0.16,1,0.3,1); }
.mobile-menu.open { transform: translateX(0); }
.mobile-menu .top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.mobile-menu .top img { height: 36px; }
.mobile-menu .close { background: none; border: none; color: var(--white); cursor: pointer; padding: 8px; }
.mobile-menu .close svg { width: 28px; height: 28px; }
.mobile-menu nav { display: flex; flex-direction: column; gap: 6px; }
.mobile-menu nav a { font-family: var(--font-display); font-weight: 600; font-size: 1.4rem; color: var(--white); padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.mobile-menu .btn { margin-top: 28px; }

/* Responsive */
@media (max-width: 960px) {
  .nav-links, .nav-cta .btn-navy { display: none; }
  .menu-btn { display: inline-flex; }
  .nav-cta { gap: 0; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .process-grid { grid-template-columns: 1fr; gap: 40px; }
  .plans-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .why-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero { min-height: auto; padding: 60px 0; }
}
@media (max-width: 560px) {
  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-ctas .btn { width: 100%; }
}