/* ===============================
   DESIGN SYSTEM
   =============================== */
:root {
  --color-primary: #0D7377;
  --color-primary-dark: #095B5E;
  --color-primary-light: #E8F6F6;
  --color-secondary: #F2A154;
  --color-secondary-dark: #E08A35;
  --color-secondary-light: #FEF5EA;
  --color-accent: #1A1A2E;
  --color-text: #2D3436;
  --color-text-light: #636E72;
  --color-bg: #FAFAFA;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-success: #27AE60;
  --color-warning: #F39C12;
  --color-error: #E74C3C;
  --font-heading: 'Roboto Slab', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
  --max-width: 1200px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--color-text); background: var(--color-bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul { list-style: none; }

/* Container */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Typography */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); color: var(--color-accent); line-height: 1.3; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 600; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }
p { margin-bottom: 1rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-light { color: var(--color-text-light); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-family: var(--font-body); font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: var(--transition); text-decoration: none; line-height: 1.2; }
.btn-primary { background: var(--color-primary); color: var(--color-white); }
.btn-primary:hover { background: var(--color-primary-dark); color: var(--color-white); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--color-secondary); color: var(--color-white); }
.btn-secondary:hover { background: var(--color-secondary-dark); color: var(--color-white); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: var(--color-white); }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }

/* ===============================
   HEADER
   =============================== */
.site-header { background: var(--color-white); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-image { height: 40px; width: auto; max-width: 180px; object-fit: contain; }
@media (max-width: 480px) { .logo-image { height: 32px; max-width: 150px; } }
.logo-icon { font-size: 1.8rem; color: var(--color-primary); }
.logo-text { font-family: var(--font-heading); font-size: 1.1rem; color: var(--color-accent); font-weight: 500; }
.logo-highlight { color: var(--color-primary); font-weight: 700; }

.main-nav ul { display: flex; align-items: center; gap: 8px; }
.main-nav a { padding: 8px 16px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 500; color: var(--color-text); }
.main-nav a:hover { background: var(--color-primary-light); color: var(--color-primary); }
.main-nav .nav-cta { background: var(--color-primary); color: var(--color-white); }
.main-nav .nav-cta:hover { background: var(--color-primary-dark); color: var(--color-white); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; z-index: 210; }
.nav-toggle span { width: 24px; height: 2px; background: var(--color-accent); border-radius: 2px; transition: var(--transition); }

/* Mobile sidebar drawer */
.nav-overlay { display: none; position: fixed; inset: 0; background: rgba(13, 35, 40, 0.55); opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; z-index: 199; }
.mobile-sidebar { display: none; position: fixed; top: 0; right: 0; width: min(340px, 85vw); height: 100%; background: var(--color-white); box-shadow: -8px 0 30px rgba(0,0,0,0.15); transform: translateX(100%); transition: transform 0.35s ease; z-index: 200; overflow-y: auto; }
body.nav-open .mobile-sidebar { transform: translateX(0); }
body.nav-open .nav-overlay { opacity: 1; visibility: visible; }
body.nav-open { overflow: hidden; }

.sidebar-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--color-border); }
.sidebar-header .logo-text { font-size: 1rem; }
.sidebar-close { background: none; border: none; font-size: 1.2rem; line-height: 1; color: var(--color-text-light); cursor: pointer; padding: 8px; border-radius: 50%; transition: var(--transition); }
.sidebar-close:hover { color: var(--color-primary); background: var(--color-primary-light); }

.sidebar-about { padding: 20px 24px; font-size: 0.9rem; color: var(--color-text-light); line-height: 1.65; border-bottom: 1px solid var(--color-border); }
.sidebar-about strong { color: var(--color-primary); }

.sidebar-nav { padding: 12px; }
.sidebar-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav a { display: block; padding: 12px 16px; border-radius: var(--radius-sm); font-weight: 500; color: var(--color-text); transition: var(--transition); }
.sidebar-nav a:hover { background: var(--color-primary-light); color: var(--color-primary); }
.sidebar-nav .nav-cta { background: var(--color-primary); color: var(--color-white); }
.sidebar-nav .nav-cta:hover { background: var(--color-primary-dark); color: var(--color-white); }

.sidebar-contact { padding: 16px 24px 24px; border-top: 1px solid var(--color-border); }
.sidebar-contact h4 { font-family: var(--font-heading); font-size: 0.9rem; color: var(--color-accent); margin-bottom: 8px; }
.sidebar-contact a { color: var(--color-primary); font-size: 0.9rem; word-break: break-all; }
.sidebar-contact a:hover { text-decoration: underline; }

@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .nav-overlay { display: block; }
  .mobile-sidebar { display: block; }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ===============================
   HERO
   =============================== */
.hero { padding: 80px 0 60px; background: linear-gradient(135deg, var(--color-primary) 0%, #0A5C5F 100%); color: var(--color-white); overflow: hidden; position: relative; }
.hero::after { content: ''; position: absolute; right: -100px; top: -100px; width: 500px; height: 500px; background: rgba(255,255,255,0.03); border-radius: 50%; }
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero h1 { color: var(--color-white); margin-bottom: 20px; }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,0.85); max-width: 540px; line-height: 1.7; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero .btn-primary { background: var(--color-white); color: var(--color-primary); }
.hero .btn-primary:hover { background: var(--color-secondary); color: var(--color-white); }
.hero .btn-outline { border-color: rgba(255,255,255,0.5); color: var(--color-white); }
.hero .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--color-white); }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.1); padding: 8px 16px; border-radius: 50px; font-size: 0.85rem; margin-bottom: 24px; backdrop-filter: blur(4px); }

.hero-visual { display: flex; align-items: center; justify-content: center; }
.hero-img { width: 100%; max-width: 480px; height: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); object-fit: cover; aspect-ratio: 480/360; background: rgba(255,255,255,0.05); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 60px 0 40px; text-align: center; }
  .hero p { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }
}

/* ===============================
   TRUST BAR
   =============================== */
.trust-bar { background: var(--color-white); border-bottom: 1px solid var(--color-border); padding: 20px 0; }
.trust-bar-inner { display: flex; justify-content: center; align-items: center; gap: 40px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--color-text-light); }
.trust-icon { color: var(--color-success); font-weight: 700; }

/* ===============================
   SECTIONS (Generic)
   =============================== */
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--color-text-light); font-size: 1.1rem; max-width: 640px; margin: 0 auto 48px; }
.section-light { background: var(--color-white); }
.section-primary { background: var(--color-primary-light); }

/* ===============================
   FEATURES / VALUE PROPS
   =============================== */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; }
.feature-card { background: var(--color-white); padding: 32px; border-radius: var(--radius-md); border: 1px solid var(--color-border); transition: var(--transition); }
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-icon { width: 48px; height: 48px; background: var(--color-primary-light); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 16px; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { color: var(--color-text-light); font-size: 0.95rem; margin: 0; }

/* ===============================
   HOW IT WORKS
   =============================== */
.steps-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; }
@media (max-width: 992px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) { .steps-grid { grid-template-columns: 1fr; } }
.step-card { text-align: center; padding: 32px 20px; }
.step-number { width: 48px; height: 48px; background: var(--color-primary); color: var(--color-white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 700; margin: 0 auto 16px; }
.step-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.step-card p { color: var(--color-text-light); font-size: 0.9rem; margin: 0; }

/* ===============================
   CALCULATOR SECTION (Homepage preview)
   =============================== */
.calc-preview { background: var(--color-white); border-radius: var(--radius-lg); padding: 48px; border: 1px solid var(--color-border); text-align: center; }
.calc-preview h3 { margin-bottom: 12px; }
.calc-preview p { color: var(--color-text-light); max-width: 480px; margin: 0 auto 24px; }

/* ===============================
   CALCULATOR PAGE
   =============================== */
.calc-page { padding: 60px 0; background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 300px); }
.calc-header { text-align: center; margin-bottom: 40px; }
.calc-header h1 { margin-bottom: 12px; }
.calc-header p { color: var(--color-text-light); max-width: 600px; margin: 0 auto; }

.calc-container { max-width: 800px; margin: 0 auto; background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; }
.calc-progress { display: flex; background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.calc-step-indicator { flex: 1; text-align: center; padding: 12px 6px; font-size: 0.8rem; font-weight: 500; color: var(--color-text-light); position: relative; }
@media (max-width: 600px) { .calc-step-indicator { font-size: 0.6rem; padding: 10px 3px; } }
.calc-step-indicator.active { color: var(--color-primary); font-weight: 600; }
.calc-step-indicator.completed { color: var(--color-success); }
.calc-step-indicator::after { content: ''; position: absolute; bottom: 0; left: 20%; right: 20%; height: 3px; background: var(--color-border); border-radius: 3px 3px 0 0; }
.calc-step-indicator.active::after { background: var(--color-primary); }
.calc-step-indicator.completed::after { background: var(--color-success); }

.calc-body { padding: 40px 48px; }
.calc-step { display: none; }
.calc-step.active { display: block; }
.calc-step h2 { font-size: 1.4rem; margin-bottom: 8px; }
.calc-step-desc { color: var(--color-text-light); margin-bottom: 28px; font-size: 0.95rem; }

/* Form elements */
.form-group { margin-bottom: 24px; }
.form-label { display: block; font-weight: 600; font-size: 0.95rem; margin-bottom: 8px; color: var(--color-accent); }
.form-label small { font-weight: 400; color: var(--color-text-light); }

.toggle-group { display: flex; gap: 8px; flex-wrap: wrap; }
.toggle-btn { padding: 10px 24px; border: 2px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-white); font-family: var(--font-body); font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: var(--transition); color: var(--color-text); }
.toggle-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.toggle-btn.selected { border-color: var(--color-primary); background: var(--color-primary); color: var(--color-white); }

.range-wrapper { padding: 8px 0; }
.range-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.range-value { font-size: 1.5rem; font-weight: 700; color: var(--color-primary); font-family: var(--font-heading); }
input[type="range"] { width: 100%; height: 6px; -webkit-appearance: none; appearance: none; background: var(--color-border); border-radius: 3px; outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 24px; height: 24px; background: var(--color-primary); border-radius: 50%; cursor: pointer; border: 3px solid var(--color-white); box-shadow: var(--shadow-sm); }
input[type="range"]::-moz-range-thumb { width: 24px; height: 24px; background: var(--color-primary); border-radius: 50%; cursor: pointer; border: 3px solid var(--color-white); box-shadow: var(--shadow-sm); }

.select-wrapper { position: relative; }
select { width: 100%; padding: 12px 16px; border: 2px solid var(--color-border); border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 0.95rem; background: var(--color-white); color: var(--color-text); transition: var(--transition); -webkit-appearance: none; appearance: none; cursor: pointer; }
select:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 3px rgba(13,115,119,0.1); }
.select-wrapper::after { content: '\25BC'; font-size: 0.7rem; position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--color-text-light); pointer-events: none; }

.radio-group { display: grid; gap: 10px; }
.radio-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border: 2px solid var(--color-border); border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition); }
.radio-item:hover { border-color: var(--color-primary); }
.radio-item.selected { border-color: var(--color-primary); background: var(--color-primary-light); }
.radio-item input[type="radio"] { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; border: 2px solid var(--color-border); border-radius: 50%; flex-shrink: 0; position: relative; }
.radio-item input[type="radio"]:checked { border-color: var(--color-primary); }
.radio-item input[type="radio"]:checked::after { content: ''; position: absolute; top: 3px; left: 3px; width: 10px; height: 10px; background: var(--color-primary); border-radius: 50%; }
.radio-item span { cursor: pointer; font-weight: 500; flex: 1; }

.calc-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.calc-nav .btn { min-width: 140px; justify-content: center; }
.btn-back { background: var(--color-bg); color: var(--color-text); }
.btn-back:hover { background: var(--color-border); }

/* ===============================
   RESULTS
   =============================== */
.calc-results { padding: 40px 48px; background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-white) 100%); display: none; }
.calc-results.active { display: block; }

.result-header { text-align: center; margin-bottom: 40px; }
.result-header h2 { color: var(--color-primary); margin-bottom: 8px; }
.result-range { font-size: 3rem; font-weight: 800; color: var(--color-accent); font-family: var(--font-heading); margin: 16px 0 8px; }
.result-sub { font-size: 0.95rem; color: var(--color-text-light); }

.result-breakdown { background: var(--color-white); border-radius: var(--radius-md); padding: 24px; margin-bottom: 24px; border: 1px solid var(--color-border); }
.result-breakdown h3 { font-size: 1rem; margin-bottom: 16px; }
.breakdown-item { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
.breakdown-item:last-child { border-bottom: none; font-weight: 700; }
.breakdown-label { color: var(--color-text); }
.breakdown-amount { font-weight: 600; }

.result-state-compare { background: var(--color-white); border-radius: var(--radius-md); padding: 24px; margin-bottom: 24px; border: 1px solid var(--color-border); }
.result-state-compare h3 { font-size: 1rem; margin-bottom: 16px; }
.compare-bar { height: 8px; border-radius: 4px; background: var(--color-border); margin: 12px 0; overflow: hidden; }
.compare-bar-fill { height: 100%; border-radius: 4px; transition: width 0.6s ease; }
.compare-bar-fill.you { background: var(--color-primary); }
.compare-bar-fill.national { background: var(--color-secondary); }
.compare-legend { display: flex; gap: 24px; flex-wrap: wrap; font-size: 0.85rem; }
.compare-legend-item { display: flex; align-items: center; gap: 8px; }
.compare-legend-dot { width: 12px; height: 12px; border-radius: 3px; }

.result-financing { background: var(--color-white); border-radius: var(--radius-md); padding: 24px; border: 1px solid var(--color-border); }
.result-financing h3 { font-size: 1rem; margin-bottom: 16px; }
.finance-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; }
.finance-card { text-align: center; padding: 16px; background: var(--color-bg); border-radius: var(--radius-sm); }
.finance-card .amount { font-size: 1.4rem; font-weight: 700; color: var(--color-primary); }
.finance-card .term { font-size: 0.8rem; color: var(--color-text-light); }

.result-actions { display: flex; gap: 16px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }

.result-disclaimer { margin-top: 24px; padding: 16px; background: var(--color-secondary-light); border-radius: var(--radius-sm); font-size: 0.8rem; color: var(--color-text-light); border-left: 3px solid var(--color-secondary); }
.result-disclaimer strong { color: var(--color-text); }

/* ===============================
   CONTENT PAGES
   =============================== */
.page-header { background: var(--color-primary); padding: 60px 0; color: var(--color-white); text-align: center; }
.page-header h1 { color: var(--color-white); margin-bottom: 12px; }
.page-header p { color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto; font-size: 1.1rem; }

.content-section { padding: 60px 0; }
.content-section h2 { margin: 40px 0 16px; }
.content-section h2:first-child { margin-top: 0; }
.content-section p, .content-section li { color: var(--color-text); line-height: 1.8; }
.content-section ul, .content-section ol { padding-left: 24px; margin-bottom: 1rem; }
.content-section li { margin-bottom: 8px; }
.content-section ul { list-style: disc; }
.content-card { background: var(--color-white); border-radius: var(--radius-md); padding: 40px; border: 1px solid var(--color-border); max-width: 800px; margin: 0 auto; }

/* Methodology page */
.methodology-highlights { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin: 32px 0; }
.meth-item { text-align: center; padding: 24px; background: var(--color-primary-light); border-radius: var(--radius-md); }
.meth-number { font-size: 2rem; font-weight: 800; color: var(--color-primary); font-family: var(--font-heading); }
.meth-label { font-size: 0.85rem; color: var(--color-text-light); margin-top: 4px; }

/* Glossary */
.glossary-list { max-width: 800px; margin: 0 auto; }
.glossary-term { padding: 20px 0; border-bottom: 1px solid var(--color-border); }
.glossary-term:last-child { border-bottom: none; }
.glossary-term h3 { font-size: 1.1rem; margin-bottom: 6px; }
.glossary-term p { font-size: 0.9rem; color: var(--color-text-light); margin: 0; }

/* ===============================
   FAQ
   =============================== */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden; }
.faq-question { width: 100%; text-align: left; padding: 18px 24px; background: var(--color-white); border: none; font-family: var(--font-body); font-size: 1rem; font-weight: 600; color: var(--color-accent); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
.faq-question:hover { background: var(--color-bg); }
.faq-question::after { content: '\25BC'; font-size: 0.8rem; color: var(--color-primary); transition: transform 0.3s ease; }
.faq-item.open .faq-question::after { content: '\25BC'; transform: rotate(180deg); }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; }
.faq-item.open .faq-answer { padding: 0 24px 18px; max-height: 300px; }
.faq-answer p { font-size: 0.95rem; color: var(--color-text-light); margin: 0; }

/* ===============================
   ADSENSE
   =============================== */
.ad-slot { margin: 32px auto; max-width: 100%; text-align: center; min-height: 90px; }
.ad-slot-label { display: block; font-size: 0.7rem; letter-spacing: 1px; text-transform: uppercase; color: var(--color-text-light); margin-bottom: 6px; }
.ad-placeholder { border: 2px dashed var(--color-border); border-radius: var(--radius-sm); padding: 28px 20px; background: var(--color-bg); color: var(--color-text-light); }
.ad-placeholder strong { display: block; color: var(--color-primary); font-size: 0.9rem; margin-bottom: 4px; }
.ad-placeholder span { font-size: 0.8rem; }
.ad-placeholder code { background: var(--color-white); border: 1px solid var(--color-border); border-radius: 4px; padding: 1px 5px; font-size: 0.75rem; }
.adsbygoogle { min-height: 90px; }

/* Sticky header / footer ads */
.sticky-ad { position: fixed; left: 0; right: 0; z-index: 300; background: var(--color-white); text-align: center; opacity: 0; visibility: hidden; transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease; }
.sticky-ad-top { top: 0; box-shadow: 0 2px 12px rgba(0,0,0,0.10); transform: translateY(-100%); }
.sticky-ad-bottom { bottom: 0; box-shadow: 0 -2px 12px rgba(0,0,0,0.10); transform: translateY(100%); }
.sticky-ad.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.sticky-ad.closed { display: none; }
.sticky-ad .adsbygoogle, .sticky-ad .ad-placeholder { max-width: 728px; margin: 0 auto; }
.sticky-ad .ad-placeholder { border: none; background: var(--color-bg); padding: 10px 48px; font-size: 0.8rem; border-radius: 0; }
.sticky-ad-close { position: absolute; right: 8px; top: 6px; background: none; border: none; cursor: pointer; color: var(--color-text-light); font-size: 1rem; line-height: 1; padding: 4px 8px; border-radius: 4px; z-index: 1; transition: var(--transition); }
.sticky-ad-close:hover { color: var(--color-primary); background: var(--color-primary-light); }

/* ===============================
   CONTACT PAGE
   =============================== */
.contact-form { max-width: 600px; margin: 0 auto; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 12px 16px; border: 2px solid var(--color-border); border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 0.95rem; transition: var(--transition); }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 3px rgba(13,115,119,0.1); }
.contact-form textarea { min-height: 140px; resize: vertical; }

/* ===============================
   FOOTER
   =============================== */
.site-footer { background: var(--color-accent); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.site-footer h4 { color: var(--color-white); font-family: var(--font-body); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px; }
.site-footer .logo .logo-text { color: var(--color-white); }
.site-footer a { color: rgba(255,255,255,0.6); }
.site-footer a:hover { color: var(--color-secondary); }
.site-footer li { margin-bottom: 10px; font-size: 0.9rem; }
.site-footer p { font-size: 0.9rem; line-height: 1.7; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; }
.footer-bottom p { font-size: 0.8rem; margin: 0; text-align: center; }

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===============================
   RESPONSIVE
   =============================== */
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .calc-body, .calc-results { padding: 24px 20px; }
  .calc-preview { padding: 32px 20px; }
  .content-card { padding: 24px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .result-range { font-size: 2.2rem; }
  .calc-nav { flex-direction: column; }
  .calc-nav .btn { width: 100%; }
}

/* ===============================
   UTILITY
   =============================== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: 8px; }
.mb-1 { margin-bottom: 8px; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.mt-3 { margin-top: 24px; }
.mb-3 { margin-bottom: 24px; }
.mt-4 { margin-top: 32px; }
.mb-4 { margin-bottom: 32px; }