/* ============================================================
   Solar Quotes SA — Design System
   ============================================================ */

/* Google Fonts — Inter for modern, consistent typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --color-background-primary: #ffffff;
  --color-background-secondary: #f8fafc;
  --color-border-tertiary: #e2e8f0;
  --color-border-secondary: #cbd5e1;
  --color-text-primary: #0f172a;
  --color-text-secondary: #64748b;
  --color-accent: #F59E0B;
  --color-accent-dark: #D97706;
  --color-blue: #1D4ED8;
  --color-blue-dark: #1E3A5F;
  --color-dark: #0F172A;
  --color-green: #16A34A;
  --color-green-bg: #DCFCE7;
  --color-yellow-bg: #FEF3C7;
  --color-blue-bg: #DBEAFE;
  --color-red: #DC2626;
  --max-width: 1100px;
  --radius: 12px;
  --transition: 0.2s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); color: var(--color-text-primary); background: var(--color-background-primary); line-height: 1.6; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; }

/* ---- Focus Styles ---- */
:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: 4px;
}
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* ============================================================
   Navigation
   ============================================================ */
.nav { display: flex; align-items: center; justify-content: space-between; padding: 0 32px; padding-top: 12px; padding-bottom: 12px; border-bottom: 0.5px solid var(--color-border-tertiary); background: var(--color-background-primary); position: sticky; top: 0; z-index: 50; }
.logo { display: flex; align-items: center; text-decoration: none; }
.logo img { height: 44px; width: auto; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { font-size: 13px; color: var(--color-text-secondary); text-decoration: none; transition: color var(--transition); }
.nav-links a:hover { color: var(--color-text-primary); }
.nav-links a.active { color: var(--color-text-primary); font-weight: 500; }
.nav-cta { background: var(--color-blue); color: #fff; font-size: 13px; padding: 8px 16px; border-radius: 8px; border: none; cursor: pointer; font-weight: 500; text-decoration: none; transition: background var(--transition); }
.nav-cta:hover { background: #1a40c0; }

.nav-right { display: flex; align-items: center; gap: 16px; }
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 6px; color: var(--color-text-primary); font-size: 22px; }

/* Mobile menu (fullscreen overlay) */
.mobile-menu { display: flex; position: fixed; inset: 0; background: var(--color-dark); z-index: 100; flex-direction: column; align-items: center; justify-content: center; gap: 28px; opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(-14px); transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s linear 0.25s; }
.mobile-menu.active { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0); transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s; }
.mobile-menu a { color: #fff; font-size: 20px; text-decoration: none; font-weight: 500; transition: color 0.15s; }
.mobile-menu a:hover { color: var(--color-accent); }
.mobile-menu a.active-page { color: var(--color-accent); font-weight: 700; }
.mobile-menu .close-menu { position: absolute; top: 16px; right: 16px; background: rgba(255,255,255,0.08); border: none; border-radius: 8px; color: #fff; font-size: 22px; cursor: pointer; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; transition: background 0.15s; }
.mobile-menu .close-menu:hover { background: rgba(255,255,255,0.18); }
.mobile-menu .mobile-cta { background: var(--color-accent); color: #1A1A1A; font-size: 16px; font-weight: 600; padding: 14px 32px; border-radius: 10px; border: none; cursor: pointer; text-decoration: none; margin-top: 8px; }

/* ============================================================
   Hero
   ============================================================ */
.hero { background: linear-gradient(160deg, var(--color-dark) 0%, var(--color-blue-dark) 60%, var(--color-blue) 100%); padding: 64px 32px 56px; position: relative; overflow: hidden; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(251,191,36,0.15); border: 0.5px solid rgba(251,191,36,0.4); color: #FCD34D; font-size: 11px; padding: 4px 10px; border-radius: 20px; margin-bottom: 20px; font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; }
.hero h1 { font-size: 32px; font-weight: 500; color: #fff; line-height: 1.25; margin-bottom: 12px; max-width: 520px; }
.hero h1 span { color: #FCD34D; }
.hero p { font-size: 15px; color: rgba(255,255,255,0.7); max-width: 400px; line-height: 1.6; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; max-width: var(--max-width); margin: 0 auto; position: relative; z-index: 1; }
.hero-image { border-radius: 16px; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.3); border: 0.5px solid rgba(255,255,255,0.1); }
.hero-image img { width: 100%; height: auto; display: block; object-fit: cover; aspect-ratio: 16/10; }

/* Sun decoration */
.sun-deco { position: absolute; right: -40px; top: -40px; width: 200px; height: 200px; border-radius: 50%; background: radial-gradient(circle, rgba(251,191,36,0.15) 0%, transparent 70%); pointer-events: none; }
.sun-ring { position: absolute; right: 40px; top: 40px; width: 160px; height: 160px; border-radius: 50%; border: 0.5px solid rgba(251,191,36,0.15); pointer-events: none; z-index: 0; }
.sun-ring2 { position: absolute; right: 10px; top: 10px; width: 220px; height: 220px; border-radius: 50%; border: 0.5px solid rgba(251,191,36,0.08); pointer-events: none; z-index: 0; }

/* Page hero (smaller, for subpages) */
.page-hero { background: linear-gradient(160deg, var(--color-dark) 0%, var(--color-blue-dark) 100%); padding: 48px 32px; position: relative; overflow: hidden; }
.page-hero h1 { font-size: 28px; font-weight: 500; color: #fff; line-height: 1.3; max-width: 640px; }
.page-hero p { font-size: 15px; color: rgba(255,255,255,0.65); max-width: 500px; line-height: 1.6; margin-top: 8px; }
.page-hero .sun-deco { position: absolute; right: -40px; top: -40px; width: 200px; height: 200px; border-radius: 50%; background: radial-gradient(circle, rgba(251,191,36,0.15) 0%, transparent 70%); }

/* ============================================================
   Buttons
   ============================================================ */
.btn-primary { background: var(--color-accent); color: #1A1A1A; font-size: 14px; font-weight: 600; padding: 12px 24px; border-radius: 8px; border: none; cursor: pointer; text-decoration: none; display: inline-block; transition: background var(--transition), transform var(--transition); }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.btn-secondary { background: transparent; color: #fff; font-size: 14px; padding: 12px 24px; border-radius: 8px; border: 0.5px solid rgba(255,255,255,0.3); cursor: pointer; text-decoration: none; transition: background var(--transition); }
.btn-secondary:hover { background: rgba(255,255,255,0.05); }

/* ============================================================
   Trust Bar
   ============================================================ */
.trust-bar { background: var(--color-background-secondary); border-bottom: 0.5px solid var(--color-border-tertiary); padding: 20px 32px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.trust-item { display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center; padding: 8px; }
.trust-item i { font-size: 28px; margin-bottom: 2px; }
.trust-item strong { display: block; font-size: 13px; font-weight: 600; color: var(--color-text-primary); }
.trust-item span { font-size: 11px; color: var(--color-text-secondary); }
.trust-item:nth-child(1) i { color: var(--color-green); }
.trust-item:nth-child(2) i { color: #7C3AED; }
.trust-item:nth-child(3) i { color: var(--color-accent-dark); }
.trust-item:nth-child(4) i { color: var(--color-blue); }

/* ============================================================
   Sections
   ============================================================ */
.section { padding: 48px 32px; max-width: var(--max-width); margin: 0 auto; }
.section-full { padding: 48px 32px; max-width: 100%; background: var(--color-background-secondary); }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-accent); font-weight: 500; margin-bottom: 8px; }
.section-title { font-size: 22px; font-weight: 600; color: var(--color-text-primary); margin-bottom: 6px; }
.section-sub { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 28px; line-height: 1.6; }

/* ============================================================
   How It Works Steps (homepage)
   ============================================================ */
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.step-card { background: #fff; border: 0.5px solid var(--color-border-tertiary); border-radius: var(--radius); padding: 20px 16px; transition: transform var(--transition), box-shadow var(--transition); }
.step-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.step-num { font-size: 11px; color: var(--color-accent); font-weight: 500; margin-bottom: 10px; }
.step-card i { font-size: 22px; display: block; margin-bottom: 10px; }
.step-card h3 { font-size: 14px; font-weight: 500; margin-bottom: 4px; }
.step-card p { font-size: 12px; color: var(--color-text-secondary); }

/* ============================================================
   Calculator Section
   ============================================================ */
.calc-section-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.calc-features { display: flex; flex-direction: column; gap: 8px; }
.calc-feature { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; background: #fff; border: 0.5px solid var(--color-border-tertiary); border-radius: var(--radius); transition: transform var(--transition); }
.calc-feature:hover { transform: translateX(4px); }
.calc-feature-icon { width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center; min-width: 36px; }
.calc-feature-icon.yellow { background: var(--color-yellow-bg); color: var(--color-accent-dark); }
.calc-feature-icon.blue { background: var(--color-blue-bg); color: var(--color-blue); }
.calc-feature-icon.green { background: var(--color-green-bg); color: var(--color-green); }
.calc-feature h4 { font-size: 14px; font-weight: 500; }
.calc-feature p { font-size: 12px; color: var(--color-text-secondary); }

/* Calculator card */
.calc-card { background: var(--color-background-primary); border: 0.5px solid var(--color-border-tertiary); border-radius: 16px; overflow: hidden; max-width: 500px; }
.calc-header { background: linear-gradient(135deg, var(--color-blue-dark), var(--color-blue)); padding: 20px 24px; }
.calc-header h3 { font-size: 16px; font-weight: 500; color: #fff; margin-bottom: 4px; }
.calc-header p { font-size: 12px; color: rgba(255,255,255,0.65); }
.calc-body { padding: 20px 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 12px; color: var(--color-text-secondary); }
.form-group select, .form-group input { padding: 10px 12px; border-radius: 8px; border: 0.5px solid var(--color-border-secondary); background: var(--color-background-secondary); font-size: 13px; color: var(--color-text-primary); min-height: 44px; transition: border-color var(--transition); }
.form-group select:focus, .form-group input:focus { border-color: var(--color-blue); }
.form-group .input-unit { position: relative; }
.form-group .input-unit input { padding-right: 52px; width: 100%; }
.form-group .input-unit .unit-label { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); font-size: 11px; color: var(--color-text-secondary); pointer-events: none; font-weight: 500; }
.calc-submit { width: 100%; background: var(--color-accent); color: #1A1A1A; font-size: 14px; font-weight: 600; padding: 12px; border-radius: 8px; border: none; cursor: pointer; margin-top: 4px; transition: background var(--transition), transform var(--transition); }
.calc-submit:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.size-preview { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 8px; min-height: 20px; }
.calc-results { background: var(--color-background-secondary); border-radius: 8px; padding: 16px; margin-top: 8px; border: 0.5px solid var(--color-border-tertiary); }
.calc-results-row { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 13px; }
.calc-results-row span { color: var(--color-text-secondary); }
.calc-results-row strong { color: var(--color-text-primary); }
.calc-results-row.total { margin-top: 8px; padding-top: 8px; border-top: 0.5px solid var(--color-border-tertiary); }

/* ============================================================
   Stats Row
   ============================================================ */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; margin-top: 32px; }
.stat { background: var(--color-background-secondary); border-radius: 8px; padding: 16px; text-align: center; transition: transform var(--transition); }
.stat:hover { transform: translateY(-2px); }
.stat-num { font-size: 22px; font-weight: 600; color: var(--color-text-primary); }
.stat-label { font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }

/* ============================================================
   Testimonials
   ============================================================ */
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.testimonial { background: var(--color-background-primary); border: 0.5px solid var(--color-border-tertiary); border-radius: var(--radius); padding: 24px; position: relative; transition: transform var(--transition), box-shadow var(--transition); }
.testimonial:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.06); }
.testimonial::before { content: '"'; position: absolute; top: 12px; left: 20px; font-size: 48px; color: var(--color-accent); opacity: 0.2; font-family: Georgia, serif; line-height: 1; }
.testimonial p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--color-blue-dark), var(--color-blue)); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 600; font-size: 14px; }
.testimonial-info strong { font-size: 13px; display: block; color: var(--color-text-primary); }
.testimonial-info span { font-size: 11px; color: var(--color-text-secondary); }
.testimonial-stars { color: var(--color-accent); font-size: 14px; letter-spacing: 2px; margin-bottom: 12px; }

/* ============================================================
   Content (long-form pages)
   ============================================================ */
.content { max-width: 760px; }
.content h2 { font-size: 20px; font-weight: 600; color: var(--color-text-primary); margin: 32px 0 12px; padding-top: 20px; border-top: 0.5px solid var(--color-border-tertiary); }
.content h2:first-child { border-top: none; margin-top: 0; padding-top: 0; }
.content h3 { font-size: 16px; font-weight: 600; margin: 24px 0 8px; }
.content p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.75; margin-bottom: 14px; }
.content ul, .content ol { margin: 0 0 16px 20px; }
.content li { font-size: 14px; color: var(--color-text-secondary); line-height: 1.75; margin-bottom: 6px; }
.content strong { color: var(--color-text-primary); }

/* ============================================================
   Tables
   ============================================================ */
.table-wrap { overflow-x: auto; margin: 20px 0; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { background: var(--color-blue-dark); color: #fff; padding: 10px 14px; text-align: left; font-weight: 500; font-size: 12px; }
td { padding: 10px 14px; border-bottom: 0.5px solid var(--color-border-tertiary); }
tr:nth-child(even) td { background: var(--color-background-secondary); }
tr:hover td { background: #f0f7ff; }

/* ============================================================
   Cards & Grids
   ============================================================ */
.card { background: var(--color-background-primary); border: 0.5px solid var(--color-border-tertiary); border-radius: var(--radius); padding: 24px; margin-bottom: 16px; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.06); border-color: var(--color-border-secondary); }
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.6; }
.card i { font-size: 24px; color: var(--color-accent); display: block; margin-bottom: 12px; }
.card i.green { color: var(--color-green); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }

.cta-box { background: linear-gradient(135deg, var(--color-blue-dark), var(--color-blue)); border-radius: var(--radius); padding: 32px; text-align: center; margin: 32px 0; }
.cta-box h2 { color: #fff; font-size: 20px; font-weight: 500; margin-bottom: 8px; border: none; padding: 0; }
.cta-box p { color: rgba(255,255,255,0.7); font-size: 14px; margin-bottom: 20px; }

/* ============================================================
   Note & Warning Boxes
   ============================================================ */
.note { background: var(--color-yellow-bg); border-left: 3px solid var(--color-accent); padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 16px 0; font-size: 13px; color: var(--color-text-primary); }
.note strong { color: #92400E; }
.warning { background: #FEE2E2; border-left: 3px solid var(--color-red); padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 16px 0; font-size: 13px; }
.warning strong { color: #991B1B; }

/* ============================================================
   Lead Modal
   ============================================================ */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); z-index: 100; align-items: center; justify-content: center; }
.modal-overlay.active { display: flex; }
.modal { background: #fff; border-radius: 16px; padding: 32px; max-width: 440px; width: 90%; position: relative; animation: modalSlideUp 0.25s ease; }
@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.modal h2 { font-size: 20px; margin-bottom: 4px; }
.modal .subtitle { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 20px; }
.modal input, .modal select { width: 100%; padding: 10px 12px; border-radius: 8px; border: 0.5px solid var(--color-border-secondary); margin-bottom: 12px; font-size: 14px; background: var(--color-background-secondary); min-height: 44px; transition: border-color var(--transition); font-family: var(--font-sans); }
.modal input:focus, .modal select:focus { border-color: var(--color-blue); outline: none; }
.modal .close { position: absolute; top: 16px; right: 16px; background: none; border: none; font-size: 20px; cursor: pointer; color: var(--color-text-secondary); }
.success-msg { display: none; text-align: center; padding: 20px; }
.success-msg.active { display: block; }
.success-msg i { font-size: 48px; color: var(--color-green); margin-bottom: 12px; }

/* Inline validation */
.input-error { border-color: var(--color-red) !important; background: #FEF2F2 !important; }
.error-msg { font-size: 12px; color: var(--color-red); margin-top: -8px; margin-bottom: 8px; display: block; }

/* ============================================================
   Footer (expanded)
   ============================================================ */
.footer { background: var(--color-dark); padding: 48px 32px 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; max-width: var(--max-width); margin: 0 auto; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,0.5); line-height: 1.6; margin-top: 12px; max-width: 280px; }
.footer-brand img { height: 36px; width: auto; filter: brightness(10); }
.footer h4 { font-size: 13px; font-weight: 600; color: rgba(255,255,255,0.7); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a { font-size: 13px; color: rgba(255,255,255,0.45); text-decoration: none; transition: color var(--transition); }
.footer a:hover { color: rgba(255,255,255,0.8); }
.footer-bottom { border-top: 0.5px solid rgba(255,255,255,0.1); margin-top: 32px; padding-top: 20px; display: flex; align-items: center; justify-content: space-between; max-width: var(--max-width); margin-left: auto; margin-right: auto; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.3); }
.footer-bottom a { font-size: 12px; color: rgba(255,255,255,0.3); text-decoration: none; }
.footer-bottom a:hover { color: rgba(255,255,255,0.6); }

/* Legacy footer (keep for backward compat during transition) */
.footer-bar { background: var(--color-dark); padding: 20px 32px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-bar p { font-size: 12px; color: rgba(255,255,255,0.4); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 12px; color: rgba(255,255,255,0.4); text-decoration: none; }
.footer-links a:hover { color: rgba(255,255,255,0.7); }

.divider { height: 0.5px; background: var(--color-border-tertiary); }

/* ============================================================
   Breadcrumbs
   ============================================================ */
.breadcrumbs { padding: 16px 32px 0; max-width: var(--max-width); margin: 0 auto; font-size: 12px; color: var(--color-text-secondary); }
.breadcrumbs a { color: var(--color-blue); text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }

/* ============================================================
   Tier Badges
   ============================================================ */
.tier-premium { background: #F3E8FF; color: #7C3AED; font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 600; }
.tier-hybrid { background: var(--color-blue-bg); color: var(--color-blue); font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 600; }
.tier-budget { background: var(--color-yellow-bg); color: #92400E; font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 600; }

/* ============================================================
   FAQ Accordion
   ============================================================ */
.faq-item { border: 0.5px solid var(--color-border-tertiary); border-radius: 10px; margin-bottom: 8px; overflow: hidden; transition: border-color var(--transition); }
.faq-item:hover { border-color: var(--color-border-secondary); }
.faq-q { padding: 16px 20px; cursor: pointer; font-size: 14px; font-weight: 500; display: flex; justify-content: space-between; align-items: center; background: var(--color-background-primary); transition: background var(--transition); }
.faq-q:hover { background: var(--color-background-secondary); }
.faq-q i { transition: transform 0.25s ease; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 20px 16px; font-size: 13px; color: var(--color-text-secondary); line-height: 1.7; }
.faq-item.open .faq-a { display: block; }
.faq-item.open .faq-q { color: var(--color-blue); }

/* ============================================================
   Back to Top Button
   ============================================================ */
.back-to-top { position: fixed; bottom: 24px; right: 24px; width: 44px; height: 44px; border-radius: 50%; background: var(--color-blue); color: #fff; border: none; cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(29,78,216,0.3); opacity: 0; visibility: hidden; transform: translateY(12px); transition: all 0.3s ease; z-index: 40; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: #1a40c0; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(29,78,216,0.4); }

/* ============================================================
   Contact Page Form
   ============================================================ */
.contact-form { background: var(--color-background-primary); border: 0.5px solid var(--color-border-tertiary); border-radius: var(--radius); padding: 24px; margin-top: 16px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px 14px; border-radius: 8px; border: 0.5px solid var(--color-border-secondary); background: var(--color-background-secondary); font-size: 14px; color: var(--color-text-primary); font-family: var(--font-sans); margin-bottom: 12px; min-height: 44px; transition: border-color var(--transition); }
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--color-blue); outline: none; }
.contact-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.contact-info-card { display: flex; gap: 12px; align-items: flex-start; padding: 16px; background: var(--color-background-secondary); border-radius: var(--radius); border: 0.5px solid var(--color-border-tertiary); }
.contact-info-card i { font-size: 24px; color: var(--color-blue); min-width: 24px; margin-top: 2px; }
.contact-info-card strong { display: block; font-size: 14px; margin-bottom: 2px; }
.contact-info-card span { font-size: 13px; color: var(--color-text-secondary); }
.contact-info-card a { color: var(--color-blue); text-decoration: none; }

/* ============================================================
   Page Graphics / Illustrations
   ============================================================ */
.page-graphic {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  border: 0.5px solid var(--color-border-tertiary);
  margin: 24px 0;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-graphic:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
}

/* ============================================================
   Responsive — Tablet (769px – 1024px)
   ============================================================ */
@media (min-width: 769px) and (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 24px; max-width: 700px; }
  .hero-image { order: -1; border-radius: 12px; }
  .hero-image img { object-fit: cover; aspect-ratio: 16/7; }
  .sun-ring, .sun-ring2 { display: none; }
  .calc-section-grid { grid-template-columns: 1fr; }
  .calc-card { max-width: 100%; }
  .trust-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-info-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Responsive — Mobile (≤768px)
   ============================================================ */
@media (max-width: 768px) {
  .nav { padding: 0 16px; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: block; }
  .hero { padding: 40px 16px 32px; }
  .hero h1 { font-size: 24px; }
  .page-hero { padding: 32px 16px; }
  .page-hero h1 { font-size: 22px; }
  .section { padding: 32px 16px; }
  .breadcrumbs { padding: 12px 16px 0; }
  .form-row { grid-template-columns: 1fr; }
  .trust-bar { grid-template-columns: 1fr; padding: 16px; gap: 8px; }
  .card-grid { grid-template-columns: 1fr; }
  .logo img { height: 36px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { order: -1; max-width: 100%; border-radius: 12px; }
  .hero-image img { object-fit: contain; width: 100%; height: auto; }
  .calc-section-grid { grid-template-columns: 1fr; }
  .calc-card { max-width: 100%; }
  .sun-ring, .sun-ring2 { display: none; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer { padding: 32px 16px 20px; }
  .contact-info-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 400px) {
  .steps-grid { grid-template-columns: 1fr; }
}