/* ===== SIMPLE SOLAR GUIDE — Main Stylesheet ===== */
:root {
  --navy: #0a3d62;
  --navy-dark: #062a45;
  --navy-light: #1a5276;
  --gold: #f39c12;
  --gold-light: #f8c471;
  --green: #27ae60;
  --green-light: #2ecc71;
  --bg: #f0f4f8;
  --white: #ffffff;
  --text: #2c3e50;
  --text-light: #5d6d7e;
  --border: #dce3ea;
  --shadow: 0 4px 20px rgba(10,61,98,0.10);
  --shadow-lg: 0 8px 40px rgba(10,61,98,0.16);
  --radius: 12px;
  --radius-lg: 20px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--gold)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{line-height:1.25;font-weight:700;color:var(--navy)}
h1{font-size:clamp(1.9rem,4vw,2.8rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:clamp(1.1rem,2vw,1.4rem)}
p{margin-bottom:1rem;color:var(--text-light)}
p:last-child{margin-bottom:0}
ul,ol{padding-left:1.4rem;margin-bottom:1rem}
li{margin-bottom:.4rem}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.section{padding:64px 0}
.section-sm{padding:40px 0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:768px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .section{padding:44px 0}
}
.site-header{background:var(--navy);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.25)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:1100px;margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:800;color:var(--white)}
.logo span{color:var(--gold)}
.logo-icon{font-size:1.6rem}
.nav-links{display:flex;align-items:center;gap:8px;list-style:none}
.nav-links a{color:rgba(255,255,255,.85);padding:7px 14px;border-radius:8px;font-size:.93rem;font-weight:500;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(255,255,255,.12)}
.nav-cta{background:var(--gold)!important;color:var(--navy)!important;font-weight:700!important;padding:8px 18px!important}
.nav-cta:hover{background:var(--gold-light)!important;color:var(--navy)!important}
.hamburger{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:4px}
.hamburger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s}
@media(max-width:768px){
  .hamburger{display:flex}
  .nav-links{display:none;position:absolute;top:62px;left:0;right:0;background:var(--navy-dark);flex-direction:column;align-items:stretch;padding:16px;gap:4px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px;border-radius:8px}
}
.hero{background:linear-gradient(135deg,var(--navy-dark) 0%,var(--navy) 50%,var(--navy-light) 100%);padding:80px 0 60px;color:#fff;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-60px;right:-60px;width:420px;height:420px;background:radial-gradient(circle,rgba(243,156,18,.20) 0%,transparent 70%);border-radius:50%}
.hero-inner{position:relative;z-index:1;max-width:1100px;margin:0 auto;padding:0 20px}
.hero-grid{display:grid;grid-template-columns:1fr 420px;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(243,156,18,.2);border:1px solid rgba(243,156,18,.4);color:var(--gold-light);padding:6px 14px;border-radius:40px;font-size:.85rem;font-weight:600;margin-bottom:20px}
.hero h1{color:#fff;margin-bottom:16px}
.hero p{color:rgba(255,255,255,.8);font-size:1.1rem;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer;border:2px solid transparent;transition:.2s;text-decoration:none}
.btn-primary{background:var(--gold);color:var(--navy)}
.btn-primary:hover{background:var(--gold-light);color:var(--navy)}
.btn-outline{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}
.btn-green{background:var(--green);color:#fff;border-color:var(--green)}
.btn-green:hover{background:var(--green-light);color:#fff}
.hero-stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hero-stat{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius);padding:16px 20px;text-align:center;backdrop-filter:blur(10px)}
.hero-stat-val{font-size:1.8rem;font-weight:800;color:var(--gold);line-height:1}
.hero-stat-label{font-size:.8rem;color:rgba(255,255,255,.7);margin-top:4px;margin-bottom:0}
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-stat-grid{display:none}
}
.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;transition:.2s}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.card-icon{font-size:2.4rem;margin-bottom:14px}
.card h3{margin-bottom:8px;font-size:1.1rem}
.card p{font-size:.9rem;margin-bottom:0}
.calc-section{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:40px;max-width:900px;margin:0 auto}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.calc-title{font-size:1.3rem;margin-bottom:24px;padding-bottom:14px;border-bottom:2px solid var(--border)}
.form-group{margin-bottom:20px}
.form-label{display:block;font-size:.88rem;font-weight:600;color:var(--text);margin-bottom:6px}
.form-label span{color:var(--text-light);font-weight:400}
.form-input,.form-select{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:8px;font-size:1rem;color:var(--text);background:var(--bg);transition:.2s}
.form-input:focus,.form-select:focus{outline:none;border-color:var(--navy);background:#fff;box-shadow:0 0 0 3px rgba(10,61,98,.08)}
.input-prefix{position:relative}
.input-prefix span{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--text-light);font-weight:600;pointer-events:none}
.input-prefix input{padding-left:28px}
.slider-group{margin-bottom:20px}
.slider{width:100%;-webkit-appearance:none;height:6px;border-radius:6px;background:var(--border);outline:none;cursor:pointer}
.slider::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--navy);cursor:pointer;box-shadow:0 2px 6px rgba(0,0,0,.2)}
.slider-labels{display:flex;justify-content:space-between;font-size:.78rem;color:var(--text-light);margin-top:4px}
.results-panel{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-light) 100%);border-radius:var(--radius);padding:28px;color:#fff}
.results-panel h3{color:#fff;margin-bottom:20px;font-size:1.1rem}
.result-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.result-row:last-child{border-bottom:none;padding-bottom:0}
.result-label{font-size:.87rem;color:rgba(255,255,255,.75)}
.result-value{font-size:1.05rem;font-weight:700;color:var(--gold)}
.result-big{background:rgba(243,156,18,.15);border:1px solid rgba(243,156,18,.3);border-radius:10px;padding:16px;margin:16px 0;text-align:center}
.result-big-val{font-size:2rem;font-weight:800;color:var(--gold);line-height:1}
.result-big-label{font-size:.82rem;color:rgba(255,255,255,.7);margin-top:4px;margin-bottom:0}
.progress-bar{height:8px;background:rgba(255,255,255,.15);border-radius:8px;margin-top:8px;overflow:hidden}
.progress-fill{height:100%;background:var(--gold);border-radius:8px;transition:width .5s ease}
.calc-disclaimer{font-size:.78rem;color:rgba(255,255,255,.55);margin-top:16px;text-align:center;margin-bottom:0}
.savings-chart{display:flex;align-items:flex-end;gap:6px;height:80px;margin:16px 0}
.savings-bar{flex:1;background:rgba(243,156,18,.3);border-radius:4px 4px 0 0;transition:height .4s}
.savings-bar.highlight{background:var(--gold)}
@media(max-width:640px){.calc-grid{grid-template-columns:1fr}}
.section-header{text-align:center;max-width:640px;margin:0 auto 48px}
.section-header h2{margin-bottom:12px}
.section-header p{font-size:1.05rem}
.tag{display:inline-block;background:rgba(243,156,18,.15);color:var(--gold);border:1px solid rgba(243,156,18,.3);padding:4px 12px;border-radius:40px;font-size:.8rem;font-weight:600;margin-bottom:16px}
.product-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column}
.product-card-body{padding:20px;flex:1}
.product-card-footer{padding:16px 20px;border-top:1px solid var(--border)}
.product-badge{display:inline-block;background:#e8f5e9;color:var(--green);font-size:.75rem;font-weight:700;padding:3px 10px;border-radius:20px;margin-bottom:10px}
.product-rating{color:var(--gold);font-size:.9rem;margin-bottom:8px}
.product-name{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:6px}
.product-desc{font-size:.85rem;color:var(--text-light);margin-bottom:0}
.price-tag{font-size:1.2rem;font-weight:800;color:var(--navy)}
.btn-amazon{display:block;text-align:center;background:#ff9900;color:#111;font-weight:700;padding:10px;border-radius:8px;font-size:.9rem;transition:.2s}
.btn-amazon:hover{background:#e68900;color:#111}
.steps{counter-reset:step}
.step{display:flex;gap:20px;margin-bottom:36px;align-items:flex-start}
.step-num{flex-shrink:0;width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem;margin-top:2px}
.step-content h3{margin-bottom:6px}
.step-content p{margin-bottom:0}
.data-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.data-table thead{background:var(--navy);color:#fff}
.data-table th{padding:14px 16px;text-align:left;font-size:.87rem;font-weight:600}
.data-table td{padding:12px 16px;border-bottom:1px solid var(--border);font-size:.9rem}
.data-table tbody tr:last-child td{border-bottom:none}
.data-table tbody tr:nth-child(even){background:#f7fafc}
.data-table tbody tr:hover{background:#edf2f7}
.td-green{color:var(--green);font-weight:700}
.td-gold{color:var(--gold);font-weight:700}
.callout{border-radius:var(--radius);padding:20px 24px;margin-bottom:24px;display:flex;gap:14px;align-items:flex-start}
.callout-info{background:#e3f2fd;border-left:4px solid #1976d2}
.callout-warn{background:#fff3e0;border-left:4px solid var(--gold)}
.callout-good{background:#e8f5e9;border-left:4px solid var(--green)}
.callout-icon{font-size:1.4rem;flex-shrink:0}
.callout-body p{margin-bottom:0;font-size:.93rem;color:var(--text)}
.faq-item{border-bottom:1px solid var(--border);padding:18px 0}
.faq-q{font-weight:700;color:var(--navy);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;list-style:none}
.faq-q::marker{display:none}
.faq-q::-webkit-details-marker{display:none}
.faq-arrow{font-size:.8rem;transition:.2s;flex-shrink:0}
details[open] .faq-arrow{transform:rotate(180deg)}
.faq-a{padding-top:12px}
.faq-a p{font-size:.93rem}
.site-footer{background:var(--navy-dark);color:rgba(255,255,255,.7);padding:52px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px}
.footer-brand p{font-size:.9rem;margin-top:10px;color:rgba(255,255,255,.55)}
.footer-col h4{color:#fff;font-size:.95rem;margin-bottom:14px}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:8px}
.footer-col a{color:rgba(255,255,255,.6);font-size:.88rem;transition:.15s}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;font-size:.82rem;color:rgba(255,255,255,.4);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom a{color:rgba(255,255,255,.5)}
@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
.text-center{text-align:center}
.text-gold{color:var(--gold)}
.text-green{color:var(--green)}
.text-navy{color:var(--navy)}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}
.mb-0{margin-bottom:0}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}
.fw-700{font-weight:700}
.breadcrumb{font-size:.85rem;color:var(--text-light);margin-bottom:24px}
.breadcrumb a{color:var(--navy)}
.breadcrumb span{margin:0 6px}