/* CA CLIMATISATION - Style & Design System */
:root {
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-secondary: #0284c7;
  --color-secondary-hover: #0369a1;
  --color-secondary-light: #e0f2fe;
  --color-accent: #059669;
  --color-accent-light: #d1fae5;
  --color-warning: #d97706;
  --color-warning-light: #fef3c7;
  --color-danger: #dc2626;
  --color-surface: #f8fafc;
  --color-surface-alt: #f1f5f9;
  --color-card: #ffffff;
  --color-border: #e2e8f0;
  --color-border-dark: #cbd5e1;
  --color-text-main: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, monospace;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); color: var(--color-text-main); background-color: var(--color-surface); line-height: 1.6; display: flex; flex-direction: column; min-height: 100vh; }
main { flex: 1; }
img, svg { display: block; max-width: 100%; }
a { color: var(--color-secondary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-secondary-hover); }
.container { width: 100%; max-width: 1240px; margin-left: auto; margin-right: auto; padding-left: 1.25rem; padding-right: 1.25rem; }
.top-notice-bar { background-color: #fef3c7; border-bottom: 1px solid #fde68a; color: #92400e; font-size: 0.8125rem; padding: 0.4rem 1rem; text-align: center; font-weight: 500; }
.top-notice-bar a { color: #78350f; text-decoration: underline; font-weight: 600; margin-left: 0.25rem; }
.top-info-bar { background-color: #0f172a; color: #cbd5e1; font-size: 0.8125rem; padding: 0.5rem 0; border-bottom: 1px solid #1e293b; }
.top-info-bar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem; }
.top-info-items { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.top-info-item { display: inline-flex; align-items: center; gap: 0.4rem; color: #cbd5e1; }
.top-info-item a { color: #e2e8f0; }
.top-info-item a:hover { color: #38bdf8; }
.status-dot { width: 8px; height: 8px; background-color: #10b981; border-radius: 50%; display: inline-block; box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.3); animation: pulseGlow 2s infinite; }
.main-header { position: sticky; top: 0; z-index: 100; background-color: rgba(255, 255, 255, 0.98); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-sm); }
.header-wrapper { display: flex; justify-content: space-between; align-items: center; padding: 0.85rem 0; }
.site-logo { display: flex; align-items: center; gap: 0.85rem; text-decoration: none; color: var(--color-primary); }
.logo-icon { width: 44px; height: 44px; border-radius: var(--radius-md); background: linear-gradient(135deg, #0284c7 0%, #0f172a 100%); display: flex; align-items: center; justify-content: center; color: #ffffff; box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25); font-size: 1.25rem; font-weight: 800; }
.logo-text-group { display: flex; flex-direction: column; }
.logo-title { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.025em; color: var(--color-primary); line-height: 1.15; }
.logo-subtitle { font-size: 0.725rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-secondary); font-weight: 700; }
.nav-menu { display: flex; align-items: center; gap: 0.35rem; list-style: none; }
.nav-link { display: inline-block; padding: 0.5rem 0.85rem; font-weight: 600; font-size: 0.9rem; color: var(--color-text-main); border-radius: var(--radius-sm); transition: all var(--transition-fast); }
.nav-link:hover, .nav-link.active { color: var(--color-secondary); background-color: var(--color-secondary-light); }
.header-cta-group { display: flex; align-items: center; gap: 0.75rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.65rem 1.25rem; font-size: 0.9rem; font-weight: 600; border-radius: var(--radius-md); cursor: pointer; border: 1px solid transparent; transition: all var(--transition-normal); text-decoration: none; line-height: 1.25; }
.btn-primary { background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%); color: #ffffff; box-shadow: 0 2px 6px rgba(2, 132, 199, 0.3); }
.btn-primary:hover { background: linear-gradient(135deg, #0369a1 0%, #075985 100%); color: #ffffff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(2, 132, 199, 0.4); }
.btn-secondary { background-color: #ffffff; color: var(--color-primary); border-color: var(--color-border); }
.btn-secondary:hover { background-color: var(--color-surface); border-color: var(--color-border-dark); color: var(--color-secondary); }
.btn-outline-white { background-color: transparent; color: #ffffff; border-color: rgba(255, 255, 255, 0.3); }
.btn-outline-white:hover { background-color: rgba(255, 255, 255, 0.1); border-color: #ffffff; color: #ffffff; }
.mobile-menu-btn { display: none; background: none; border: 1px solid var(--color-border); padding: 0.5rem; border-radius: var(--radius-sm); color: var(--color-primary); cursor: pointer; }
.mobile-nav-panel { display: none; padding: 1rem 0; border-top: 1px solid var(--color-border); }
.mobile-nav-panel.open { display: block; }
.mobile-nav-list { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.mobile-nav-list .nav-link { display: block; padding: 0.75rem 1rem; }

/* Hero Section */
.hero-section { background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0369a1 100%); color: #ffffff; padding: 4.5rem 0 3.5rem; position: relative; overflow: hidden; }
.hero-pattern { position: absolute; inset: 0; background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px); background-size: 24px 24px; opacity: 0.6; pointer-events: none; }
.hero-content { position: relative; z-index: 2; max-width: 900px; margin: 0 auto; text-align: center; }
.badge-institutional { display: inline-flex; align-items: center; gap: 0.5rem; background-color: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.2); color: #e0f2fe; padding: 0.35rem 1.1rem; border-radius: 9999px; font-size: 0.825rem; font-weight: 600; margin-bottom: 1.5rem; letter-spacing: 0.02em; }
.hero-title { font-size: 2.75rem; line-height: 1.15; font-weight: 800; margin-bottom: 1.25rem; letter-spacing: -0.03em; color: #ffffff; }
.hero-title span { color: #38bdf8; }
.hero-description { font-size: 1.15rem; line-height: 1.7; color: #cbd5e1; margin-bottom: 2rem; max-width: 760px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; justify-content: center; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; background-color: rgba(15, 23, 42, 0.7); border: 1px solid rgba(255, 255, 255, 0.15); padding: 1.5rem; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.stat-item { text-align: center; border-right: 1px solid rgba(255, 255, 255, 0.1); padding: 0 0.5rem; }
.stat-item:last-child { border-right: none; }
.stat-value { font-size: 1.65rem; font-weight: 800; color: #38bdf8; font-family: var(--font-mono); margin-bottom: 0.25rem; }
.stat-label { font-size: 0.78rem; color: #94a3b8; text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; }

/* Sections */
.section { padding: 4.5rem 0; }
.section-alt { background-color: #ffffff; }
.section-header { text-align: center; max-width: 760px; margin: 0 auto 3rem; }
.section-tag { display: inline-block; font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-secondary); background-color: var(--color-secondary-light); padding: 0.3rem 0.85rem; border-radius: 9999px; margin-bottom: 0.75rem; }
.section-title { font-size: 2.15rem; font-weight: 800; color: var(--color-primary); line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 0.85rem; }
.section-subtitle { font-size: 1.05rem; color: var(--color-text-muted); line-height: 1.65; }

/* Calculator */
.calculator-card { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); overflow: hidden; display: grid; grid-template-columns: 1.2fr 0.8fr; margin-bottom: 2rem; }
.calc-inputs-side { padding: 2.5rem; background-color: #ffffff; }
.calc-results-side { padding: 2.5rem; background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #ffffff; display: flex; flex-direction: column; justify-content: space-between; }
.calc-group { margin-bottom: 1.5rem; }
.calc-label { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 0.95rem; color: var(--color-primary); margin-bottom: 0.5rem; }
.calc-value-badge { font-family: var(--font-mono); font-size: 0.95rem; font-weight: 700; color: var(--color-secondary); background-color: var(--color-secondary-light); padding: 0.15rem 0.5rem; border-radius: var(--radius-sm); }
.calc-slider { width: 100%; height: 8px; border-radius: 4px; background: #e2e8f0; outline: none; -webkit-appearance: none; cursor: pointer; }
.calc-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 22px; height: 22px; border-radius: 50%; background: var(--color-secondary); cursor: pointer; box-shadow: 0 2px 6px rgba(2, 132, 199, 0.4); border: 2px solid #ffffff; }
.calc-options-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
.calc-radio-card { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 0.75rem 1rem; cursor: pointer; transition: all var(--transition-fast); background-color: var(--color-surface); display: flex; flex-direction: column; }
.calc-radio-card:hover { border-color: var(--color-secondary); background-color: #ffffff; }
.calc-radio-card.active { border-color: var(--color-secondary); background-color: var(--color-secondary-light); box-shadow: 0 0 0 1px var(--color-secondary); }
.calc-radio-title { font-weight: 700; font-size: 0.875rem; color: var(--color-primary); margin-bottom: 0.15rem; }
.calc-radio-desc { font-size: 0.75rem; color: var(--color-text-muted); }
.result-header { border-bottom: 1px solid rgba(255, 255, 255, 0.15); padding-bottom: 1.25rem; margin-bottom: 1.5rem; }
.result-title { font-size: 1.25rem; font-weight: 700; color: #ffffff; display: flex; align-items: center; gap: 0.5rem; }
.result-main-metric { background-color: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: var(--radius-lg); padding: 1.25rem; text-align: center; margin-bottom: 1.25rem; }
.result-power-number { font-size: 2.5rem; font-weight: 800; color: #38bdf8; font-family: var(--font-mono); line-height: 1; margin-bottom: 0.25rem; }
.result-power-unit { font-size: 1.15rem; font-weight: 600; color: #94a3b8; }
.result-breakdown { display: flex; flex-direction: column; gap: 0.85rem; margin-bottom: 1.5rem; }
.result-row { display: flex; justify-content: space-between; align-items: center; font-size: 0.875rem; padding-bottom: 0.5rem; border-bottom: 1px dashed rgba(255, 255, 255, 0.1); }
.result-row-label { color: #cbd5e1; }
.result-row-value { font-weight: 700; color: #ffffff; font-family: var(--font-mono); }

/* Tabs & Systems */
.tabs-nav { display: flex; justify-content: center; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.tab-btn { padding: 0.75rem 1.25rem; background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-md); font-weight: 600; font-size: 0.9rem; color: var(--color-text-main); cursor: pointer; transition: all var(--transition-fast); display: inline-flex; align-items: center; gap: 0.5rem; }
.tab-btn:hover { background-color: var(--color-surface); border-color: var(--color-secondary); }
.tab-btn.active { background-color: var(--color-secondary); color: #ffffff; border-color: var(--color-secondary); box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3); }
.tab-pane { display: none; animation: fadeIn 0.4s ease; }
.tab-pane.active { display: block; }
.system-card { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 2.25rem; box-shadow: var(--shadow-md); display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2rem; align-items: center; }
.system-info-title { font-size: 1.75rem; font-weight: 800; color: var(--color-primary); margin-bottom: 0.75rem; }
.system-info-desc { color: var(--color-text-muted); margin-bottom: 1.5rem; line-height: 1.7; }
.specs-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.specs-table th, .specs-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--color-border); font-size: 0.875rem; }
.specs-table th { background-color: var(--color-surface); color: var(--color-primary); font-weight: 700; }
.specs-table td { color: var(--color-text-main); }
.badge-tech { display: inline-block; padding: 0.2rem 0.5rem; font-size: 0.75rem; font-weight: 700; border-radius: var(--radius-sm); background-color: var(--color-accent-light); color: var(--color-accent); }

/* Features & Standards */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature-card { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow-sm); transition: all var(--transition-normal); display: flex; flex-direction: column; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-secondary); }
.feature-icon-wrapper { width: 52px; height: 52px; border-radius: var(--radius-md); background-color: var(--color-secondary-light); color: var(--color-secondary); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 1.25rem; }
.feature-title { font-size: 1.25rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.65rem; }
.feature-text { font-size: 0.925rem; color: var(--color-text-muted); line-height: 1.6; }
.standards-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.standard-card { background-color: var(--color-surface); border: 1px solid var(--color-border); border-left: 4px solid var(--color-secondary); border-radius: var(--radius-md); padding: 1.5rem; }
.standard-title { font-size: 1.1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.4rem; display: flex; align-items: center; gap: 0.5rem; }
.standard-desc { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.6; }

/* FAQ & Form */
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.faq-item { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; transition: border-color var(--transition-fast); }
.faq-item.open { border-color: var(--color-secondary); }
.faq-question { width: 100%; text-align: left; padding: 1.25rem 1.5rem; background: none; border: none; font-size: 1.05rem; font-weight: 700; color: var(--color-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq-icon { width: 20px; height: 20px; transition: transform var(--transition-normal); color: var(--color-secondary); flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(180deg); }
.faq-answer { display: none; padding: 0 1.5rem 1.25rem; color: var(--color-text-muted); font-size: 0.95rem; line-height: 1.7; }
.faq-item.open .faq-answer { display: block; }
.form-card { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 2.5rem; box-shadow: var(--shadow-lg); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.form-group-full { grid-column: 1 / -1; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--color-primary); margin-bottom: 0.35rem; }
.form-input, .form-select, .form-textarea { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); font-family: var(--font-sans); font-size: 0.95rem; color: var(--color-text-main); background-color: var(--color-surface); transition: all var(--transition-fast); }
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--color-secondary); background-color: #ffffff; box-shadow: 0 0 0 3px var(--color-secondary-light); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-check { display: flex; align-items: flex-start; gap: 0.65rem; font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.5; }
.form-check input[type="checkbox"] { margin-top: 0.2rem; cursor: pointer; }
.alert { padding: 1rem 1.25rem; border-radius: var(--radius-md); font-size: 0.9rem; margin-bottom: 1.25rem; display: flex; align-items: center; gap: 0.75rem; }
.alert-success { background-color: var(--color-accent-light); color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background-color: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }

/* Articles & Content Prose */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.article-card { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: all var(--transition-normal); display: flex; flex-direction: column; }
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-secondary); }
.article-card-body { padding: 1.75rem; display: flex; flex-direction: column; flex: 1; }
.article-meta { display: flex; align-items: center; gap: 0.75rem; font-size: 0.8rem; color: var(--color-text-light); margin-bottom: 0.75rem; }
.article-card-title { font-size: 1.25rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.75rem; line-height: 1.35; }
.article-card-excerpt { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.6; margin-bottom: 1.25rem; flex: 1; }
.article-read-more { display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 700; font-size: 0.875rem; color: var(--color-secondary); }
.content-prose { background-color: #ffffff; border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 3rem; box-shadow: var(--shadow-md); margin-bottom: 3rem; }
.content-prose h1 { font-size: 2.25rem; font-weight: 800; color: var(--color-primary); margin-bottom: 1rem; line-height: 1.2; }
.content-prose h2 { font-size: 1.5rem; font-weight: 700; color: var(--color-primary); margin-top: 2rem; margin-bottom: 0.85rem; border-bottom: 2px solid var(--color-surface); padding-bottom: 0.5rem; }
.content-prose h3 { font-size: 1.2rem; font-weight: 700; color: var(--color-primary-light); margin-top: 1.5rem; margin-bottom: 0.5rem; }
.content-prose p { font-size: 1rem; color: var(--color-text-main); line-height: 1.75; margin-bottom: 1.25rem; }
.content-prose ul, .content-prose ol { margin-left: 1.5rem; margin-bottom: 1.25rem; color: var(--color-text-main); line-height: 1.75; }
.content-prose li { margin-bottom: 0.4rem; }
.content-prose blockquote { border-left: 4px solid var(--color-secondary); background-color: var(--color-surface); padding: 1rem 1.5rem; margin: 1.5rem 0; border-radius: 0 var(--radius-md) var(--radius-md) 0; font-style: italic; color: var(--color-text-muted); }
.content-prose table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.content-prose table th, .content-prose table td { padding: 0.75rem 1rem; border: 1px solid var(--color-border); text-align: left; font-size: 0.9rem; }
.content-prose table th { background-color: var(--color-surface); font-weight: 700; color: var(--color-primary); }

/* Contact Specific */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 2.5rem; }
.contact-info-card { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #ffffff; border-radius: var(--radius-xl); padding: 2.5rem; box-shadow: var(--shadow-lg); display: flex; flex-direction: column; justify-content: space-between; }
.contact-item { display: flex; align-items: flex-start; gap: 1rem; margin-bottom: 1.75rem; }
.contact-icon { width: 44px; height: 44px; border-radius: var(--radius-md); background-color: rgba(255, 255, 255, 0.1); color: #38bdf8; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.contact-item-title { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: #94a3b8; margin-bottom: 0.25rem; }
.contact-item-value { font-size: 1.05rem; font-weight: 600; color: #ffffff; }
.contact-item-value a { color: #ffffff; }
.contact-item-value a:hover { color: #38bdf8; }
.map-container { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); box-shadow: var(--shadow-md); margin-top: 2rem; height: 380px; }
.map-container iframe { width: 100%; height: 100%; border: 0; }

/* Footer */
.site-footer { background-color: #0f172a; color: #94a3b8; border-top: 1px solid #1e293b; padding: 4rem 0 2rem; font-size: 0.9rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 2.5rem; margin-bottom: 3rem; }
.footer-col-title { color: #ffffff; font-size: 1rem; font-weight: 700; margin-bottom: 1.25rem; text-transform: uppercase; letter-spacing: 0.05em; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.footer-links a { color: #94a3b8; transition: color var(--transition-fast); }
.footer-links a:hover { color: #38bdf8; padding-left: 0.25rem; }
.footer-legal-text { font-size: 0.85rem; line-height: 1.65; color: #64748b; margin-bottom: 1rem; }
.footer-bottom { border-top: 1px solid #1e293b; padding-top: 2rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; font-size: 0.85rem; }
.footer-bottom-copy { color: #64748b; }

/* Animations & Responsive */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulseGlow { 0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); } 70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); } 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); } }

@media (max-width: 1024px) {
  .calculator-card { grid-template-columns: 1fr; }
  .system-card { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
}

@media (max-width: 768px) {
  .nav-menu, .header-cta-group { display: none; }
  .mobile-menu-btn { display: block; }
  .hero-title { font-size: 2rem; }
  .calc-options-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .standards-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .content-prose { padding: 1.5rem; }
  .hero-stats-grid { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255, 255, 255, 0.1); padding-bottom: 0.75rem; margin-bottom: 0.75rem; }
  .stat-item:last-child { border-bottom: none; padding-bottom: 0; margin-bottom: 0; }
}