/* ===========================
   Zenith SiC Theme - main.css
   =========================== */

/* --- CSS Variables --- */
:root {
  --primary: #c0392b;
  --primary-dark: #a93226;
  --dark: #1a1a1a;
  --dark2: #2c2c2c;
  --mid: #555;
  --light: #f5f5f5;
  --white: #ffffff;
  --border: #e0e0e0;
  --font: 'Segoe UI', Arial, sans-serif;
  --radius: 6px;
  --shadow: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.15);
  --transition: 0.3s ease;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--dark); background: var(--white); line-height: 1.7; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
ul { list-style: none; }
table { border-collapse: collapse; width: 100%; }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--dark); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; }
p { margin-bottom: 1rem; color: #444; }

/* --- Layout --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--primary);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: var(--white); }
.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--dark);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--dark);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.btn-outline:hover { background: var(--dark); color: var(--white); }
.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--white);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--white);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.btn-secondary:hover { background: var(--white); color: var(--dark); }
.btn-lg { padding: 18px 40px; font-size: 1.1rem; }
.btn-full { width: 100%; }

/* ===========================
   HEADER & NAVIGATION
   =========================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(26,26,26,0.97);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-logo { display: flex; align-items: center; gap: 12px; }
.logo-text { font-size: 1.6rem; font-weight: 800; color: var(--white); letter-spacing: 2px; }
.logo-sub { font-size: 0.65rem; color: #aaa; letter-spacing: 3px; text-transform: uppercase; display: block; }
.primary-nav { display: flex; align-items: center; gap: 4px; }
.primary-nav a {
  color: #ccc;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}
.primary-nav a:hover, .primary-nav a.active { color: var(--white); background: rgba(255,255,255,0.1); }
.header-cta { margin-left: 12px; }
.header-cta a { padding: 10px 20px; font-size: 0.88rem; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); transition: var(--transition); }
.mobile-nav {
  display: none;
  background: var(--dark2);
  padding: 16px 24px 24px;
  border-top: 1px solid #333;
}
.mobile-nav a {
  display: block;
  color: #ccc;
  padding: 12px 0;
  font-size: 1rem;
  border-bottom: 1px solid #333;
  transition: var(--transition);
}
.mobile-nav a:hover { color: var(--white); }
.mobile-nav .btn-primary { margin-top: 16px; display: block; text-align: center; }

/* ===========================
   HOME PAGE
   =========================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.4;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}
.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 20px;
  font-weight: 600;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 24px;
}
.hero-title span { color: var(--primary); }
.hero-desc {
  font-size: 1.2rem;
  color: #ccc;
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
  flex-wrap: wrap;
}
.hero-stat-num { font-size: 2.5rem; font-weight: 800; color: var(--white); }
.hero-stat-label { font-size: 0.85rem; color: #aaa; text-transform: uppercase; letter-spacing: 2px; }

/* Home Products Section */
.home-products { background: var(--light); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { color: var(--mid); font-size: 1.1rem; }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.product-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-card-img { aspect-ratio: 4/3; overflow: hidden; }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body { padding: 28px; }
.product-card-body h3 { margin-bottom: 10px; font-size: 1.2rem; }
.product-card-body p { font-size: 0.95rem; color: var(--mid); margin-bottom: 20px; }
.product-card-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.product-card-btns a { padding: 10px 20px; font-size: 0.9rem; }

/* Home Features Section */
.home-features { background: var(--dark); }
.home-features .section-header h2 { color: var(--white); }
.home-features .section-header p { color: #aaa; }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.feature-card { text-align: center; padding: 32px 20px; }
.feature-icon { font-size: 2.5rem; margin-bottom: 16px; }
.feature-card h3 { color: var(--white); margin-bottom: 12px; font-size: 1.1rem; }
.feature-card p { color: #aaa; font-size: 0.95rem; }

/* Home Applications Section */
.home-apps { background: var(--white); }
.apps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.app-card {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 4/3;
}
.app-card img { width: 100%; height: 100%; object-fit: cover; }
.app-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 24px;
}
.app-card-overlay h3 { color: var(--white); font-size: 1.1rem; }

/* Home CTA Section */
.home-cta {
  background: var(--primary);
  text-align: center;
  padding: 80px 24px;
}
.home-cta h2 { color: var(--white); margin-bottom: 16px; }
.home-cta p { color: rgba(255,255,255,0.85); font-size: 1.1rem; margin-bottom: 32px; }
.home-cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===========================
   PAGE HERO (inner pages)
   =========================== */
.page-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 100%);
  padding: 140px 24px 80px;
  text-align: center;
}
.page-hero h1 { color: var(--white); margin-bottom: 16px; }
.page-hero p { color: #aaa; font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* ===========================
   PRODUCT OVERVIEW PAGE
   =========================== */
.product-detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border);
}
.product-detail-row:last-child { border-bottom: none; }
.product-detail-row.reverse { direction: rtl; }
.product-detail-row.reverse > * { direction: ltr; }
.product-detail-img { border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-lg); }
.product-detail-img img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.product-tag {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.product-detail-info h2 { margin-bottom: 16px; }
.product-detail-info p { color: var(--mid); margin-bottom: 24px; }

/* ===========================
   SPEC TABLES
   =========================== */
.spec-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.spec-table th {
  background: var(--dark);
  color: var(--white);
  padding: 12px 16px;
  text-align: left;
  font-size: 0.9rem;
  font-weight: 600;
}
.spec-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  color: #444;
}
.spec-table tr:nth-child(even) td { background: #fafafa; }
.spec-table tr:hover td { background: #f0f0f0; }
.full-table { font-size: 0.9rem; }
.table-responsive { overflow-x: auto; }
.spec-section-title { font-size: 1.5rem; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 3px solid var(--primary); }
.spec-note {
  background: #fff8f8;
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 40px;
}
.spec-note p { margin: 0; color: #555; }

/* ===========================
   SELECTION GUIDE PAGE
   =========================== */
.guide-steps { display: flex; flex-direction: column; gap: 0; }
.guide-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}
.step-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  opacity: 0.8;
}
.step-content h2 { margin-bottom: 16px; font-size: 1.4rem; }
.guide-shape-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 20px; }
.guide-shape-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  padding-bottom: 16px;
}
.guide-shape-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.guide-shape-card h3 { padding: 12px 16px 8px; font-size: 1rem; }
.guide-shape-card ul { padding: 0 16px; }
.guide-shape-card ul li { font-size: 0.9rem; color: var(--mid); padding: 4px 0; border-bottom: 1px solid #f0f0f0; }
.guide-shape-card ul li::before { content: "✓ "; color: var(--primary); font-weight: 700; }
.formula-box {
  background: var(--dark);
  color: var(--white);
  padding: 24px 28px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.formula-box p { color: #ddd; margin: 0; }
.formula-box p:first-child { font-size: 1.2rem; margin-bottom: 8px; }
.guide-checklist { margin-top: 16px; }
.guide-checklist li { padding: 8px 0; border-bottom: 1px solid var(--border); color: #444; }
.guide-checklist li::before { content: "→ "; color: var(--primary); font-weight: 700; }
.guide-cta {
  background: var(--light);
  border-radius: 12px;
  padding: 48px;
  text-align: center;
  margin-top: 60px;
}
.guide-cta h2 { margin-bottom: 12px; }
.guide-cta p { color: var(--mid); margin-bottom: 28px; }
.guide-cta .product-card-btns { justify-content: center; }

/* ===========================
   SELECTION ASSISTANT PAGE
   =========================== */
.selector-form { max-width: 900px; margin: 0 auto; }
.selector-section {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.selector-section h3 {
  font-size: 1.1rem;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.selector-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}
.selector-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.selector-field { display: flex; flex-direction: column; gap: 8px; }
.selector-field label { font-size: 0.9rem; font-weight: 600; color: var(--dark); }
.selector-field select,
.selector-field input,
.selector-field textarea {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: var(--font);
  background: var(--white);
  color: var(--dark);
  transition: var(--transition);
  width: 100%;
}
.selector-field select:focus,
.selector-field input:focus,
.selector-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(192,57,43,0.1);
}
.selector-type-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.selector-type-card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.selector-type-card:hover { border-color: var(--primary); }
.selector-type-card input[type="radio"] { display: none; }
.selector-type-card:has(input:checked) { border-color: var(--primary); background: #fff8f8; }
.selector-type-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.selector-type-card span { display: block; padding: 12px; font-weight: 600; font-size: 0.9rem; }
.selector-submit { text-align: center; padding: 20px 0; }
.selector-privacy { font-size: 0.85rem; color: var(--mid); margin-top: 12px; }
.selector-result { margin-top: 24px; padding: 20px; border-radius: var(--radius); }

/* ===========================
   APPLICATIONS PAGE
   =========================== */
.app-grid-3col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.app-card-full {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.app-card-full:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.app-card-img { aspect-ratio: 16/9; overflow: hidden; }
.app-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.app-card-full:hover .app-card-img img { transform: scale(1.05); }
.app-card-body { padding: 28px; }
.app-card-num { font-size: 2rem; font-weight: 900; color: var(--primary); opacity: 0.3; margin-bottom: 8px; }
.app-card-body h3 { margin-bottom: 12px; font-size: 1.15rem; }
.app-card-body p { font-size: 0.9rem; color: var(--mid); margin-bottom: 16px; }
.app-list { margin-top: 12px; }
.app-list li { font-size: 0.88rem; color: #555; padding: 5px 0; border-bottom: 1px solid #f0f0f0; }
.app-list li::before { content: "→ "; color: var(--primary); }
.cta-banner-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===========================
   INSTALLATION PAGE
   =========================== */
.install-diagram-wrap {
  background: var(--light);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 60px;
  text-align: center;
}
.install-diagram-img { max-width: 800px; margin: 0 auto 24px; border-radius: var(--radius); box-shadow: var(--shadow); }
.install-diagram-legend { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: #555; }
.legend-dot { width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0; }
.legend-dot.red { background: #e74c3c; }
.legend-dot.gray { background: #95a5a6; }
.legend-dot.blue { background: #3498db; }
.legend-dot.orange { background: #e67e22; }
.install-steps { display: flex; flex-direction: column; gap: 0; margin-bottom: 60px; }
.install-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.install-step-num {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  flex-shrink: 0;
}
.install-step-content h3 { margin-bottom: 12px; font-size: 1.1rem; }
.install-step-content p { color: var(--mid); }
.install-faq { margin-top: 60px; }
.install-faq h2 { margin-bottom: 24px; }

/* ===========================
   FAQ PAGE
   =========================== */
.faq-category {
  font-size: 1.3rem;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
}

/* ===========================
   ACCORDION
   =========================== */
.accordion-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 8px; overflow: hidden; }
.accordion-btn {
  width: 100%;
  background: var(--white);
  border: none;
  padding: 18px 24px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  font-family: var(--font);
}
.accordion-btn:hover { background: var(--light); }
.accordion-btn.active { background: var(--dark); color: var(--white); }
.acc-icon { font-size: 1.4rem; font-weight: 300; transition: var(--transition); flex-shrink: 0; }
.accordion-btn.active .acc-icon { transform: rotate(45deg); }
.accordion-content { display: none; padding: 20px 24px; background: #fafafa; border-top: 1px solid var(--border); }
.accordion-content p { color: #555; margin: 0; }

/* ===========================
   CONTACT PAGE
   =========================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
  align-items: start;
}
.contact-form-col { padding-right: 48px; }
.contact-form-card h2 { font-size: 1.8rem; margin-bottom: 8px; }
.contact-form-sub { color: var(--mid); margin-bottom: 32px; }
.contact-form { display: flex; flex-direction: column; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 0; }
.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.form-group label { font-size: 0.9rem; font-weight: 600; color: var(--dark); }
.req { color: var(--primary); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 14px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  transition: var(--transition);
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(192,57,43,0.1);
}
.form-check { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; }
.form-check input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; }
.form-check label { font-size: 0.9rem; color: #555; cursor: pointer; }
.form-privacy { font-size: 0.85rem; color: var(--mid); margin-top: 12px; text-align: center; }
.form-result { padding: 16px 20px; border-radius: var(--radius); font-weight: 600; margin-top: 16px; }
.form-result.success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.form-result.error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

/* Contact Info Column */
.contact-info-col { display: flex; flex-direction: column; gap: 24px; }
.contact-info-card {
  background: var(--dark);
  border-radius: 12px;
  padding: 32px;
  color: var(--white);
}
.contact-info-card h3 { color: var(--white); margin-bottom: 20px; font-size: 1.1rem; letter-spacing: 1px; text-transform: uppercase; }
.contact-info-person { margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid #333; }
.contact-info-name { font-size: 1.4rem; font-weight: 700; color: var(--white); }
.contact-info-title { font-size: 0.9rem; color: #aaa; margin-top: 4px; }
.contact-info-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 24px; }
.contact-info-list li { display: flex; align-items: flex-start; gap: 14px; }
.contact-info-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.contact-info-label { font-size: 0.8rem; color: #aaa; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 2px; }
.contact-info-value { color: var(--white); font-size: 0.95rem; }
.contact-info-value a { color: #f0a080; }
.contact-info-value a:hover { color: var(--white); }
.whatsapp-btn {
  display: block;
  background: #25D366;
  color: var(--white);
  text-align: center;
  padding: 14px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}
.whatsapp-btn:hover { background: #1da851; color: var(--white); }
.contact-map-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.contact-map-card h3 { padding: 20px 24px 16px; font-size: 1rem; border-bottom: 1px solid var(--border); }
.contact-map-embed iframe { display: block; }

/* ===========================
   BLOG PAGE
   =========================== */
.blog-list { display: flex; flex-direction: column; gap: 0; }
.blog-list-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 20px;
  transition: var(--transition);
}
.blog-list-item:hover { box-shadow: var(--shadow); }
.blog-list-header {
  padding: 32px;
  cursor: pointer;
  background: var(--white);
  transition: var(--transition);
}
.blog-list-header:hover { background: #fafafa; }
.blog-list-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.blog-tag {
  background: var(--primary);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.blog-date { font-size: 0.85rem; color: var(--mid); }
.blog-list-title { font-size: 1.3rem; color: var(--dark); margin-bottom: 10px; line-height: 1.4; }
.blog-list-excerpt { color: var(--mid); font-size: 0.95rem; margin-bottom: 16px; }
.blog-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
}
.blog-toggle-btn:hover { background: var(--primary); color: var(--white); }
.blog-toggle-icon { font-size: 1.2rem; transition: var(--transition); }
.blog-toggle-btn.open .blog-toggle-icon { transform: rotate(45deg); }
.blog-list-body { border-top: 1px solid var(--border); background: #fafafa; }
.blog-content { padding: 40px; max-width: 800px; }
.blog-img { width: 100%; max-height: 400px; object-fit: cover; border-radius: var(--radius); margin-bottom: 28px; }
.blog-content h3 { margin: 24px 0 12px; font-size: 1.2rem; }
.blog-content p { color: #444; line-height: 1.8; }
.blog-content ul { margin: 12px 0 20px 20px; }
.blog-content ul li { color: #444; padding: 4px 0; list-style: disc; }
.blog-share { display: flex; align-items: center; gap: 12px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.blog-share span { font-size: 0.9rem; color: var(--mid); font-weight: 600; }
.share-btn {
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: #555;
  transition: var(--transition);
}
.share-btn:hover { background: var(--dark); color: var(--white); border-color: var(--dark); }

/* ===========================
   ABOUT PAGE
   =========================== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 80px; }
.about-intro-text h2 { margin-bottom: 20px; }
.about-intro-text p { color: var(--mid); }
.about-stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.about-stat {
  background: var(--dark);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.stat-big { font-size: 2.5rem; font-weight: 900; color: var(--primary); }
.about-stat span:last-child { font-size: 0.85rem; color: #aaa; text-transform: uppercase; letter-spacing: 2px; }
.about-values { margin-bottom: 80px; }
.about-values h2 { margin-bottom: 32px; }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.value-card {
  background: var(--light);
  border-radius: 10px;
  padding: 28px;
  border-top: 3px solid var(--primary);
}
.value-card h3 { margin-bottom: 12px; font-size: 1rem; }
.value-card p { font-size: 0.9rem; color: var(--mid); margin: 0; }
.about-contact-section h2 { margin-bottom: 24px; }
.contact-person-card {
  background: var(--dark);
  border-radius: 12px;
  padding: 40px;
  max-width: 600px;
}
.contact-person-info h3 { color: var(--white); font-size: 1.5rem; margin-bottom: 4px; }
.contact-person-title { color: var(--primary); font-size: 0.9rem; margin-bottom: 16px; }
.contact-person-info p { color: #aaa; margin-bottom: 20px; }
.contact-person-details { margin-bottom: 28px; }
.contact-person-details li { color: #ccc; padding: 8px 0; border-bottom: 1px solid #333; font-size: 0.95rem; }
.contact-person-details li strong { color: var(--white); }
.contact-person-details li a { color: #f0a080; }

/* ===========================
   CTA BANNER
   =========================== */
.section-cta-banner {
  background: var(--dark);
  padding: 80px 24px;
  text-align: center;
}
.section-cta-banner h2 { color: var(--white); margin-bottom: 16px; }
.section-cta-banner p { color: #aaa; font-size: 1.1rem; margin-bottom: 32px; }

/* ===========================
   FOOTER
   =========================== */
.site-footer { background: #111; color: #aaa; padding: 60px 0 0; }
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  border-bottom: 1px solid #222;
}
.footer-brand .logo-text { color: var(--white); font-size: 1.4rem; }
.footer-brand p { font-size: 0.9rem; margin-top: 16px; line-height: 1.8; }
.footer-col h4 { color: var(--white); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: #aaa; font-size: 0.9rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--white); }
.footer-contact-item { display: flex; gap: 10px; margin-bottom: 12px; font-size: 0.9rem; }
.footer-contact-item a { color: #aaa; transition: var(--transition); }
.footer-contact-item a:hover { color: var(--white); }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* ===========================
   SCROLL TO TOP
   =========================== */
.scroll-top-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}
.scroll-top-btn.visible { opacity: 1; visibility: visible; }
.scroll-top-btn:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-form-col { padding-right: 0; margin-bottom: 40px; }
  .app-grid-3col { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .primary-nav, .header-cta { display: none; }
  .hamburger { display: flex; }
  .mobile-nav.open { display: block; }
  .products-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr; }
  .app-grid-3col { grid-template-columns: 1fr; }
  .product-detail-row { grid-template-columns: 1fr; gap: 32px; }
  .product-detail-row.reverse { direction: ltr; }
  .guide-step { grid-template-columns: 1fr; gap: 16px; }
  .guide-shape-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .hero-stats { gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .selector-type-grid { grid-template-columns: 1fr; }
  .blog-content { padding: 24px; }
  .contact-layout { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; }
  .features-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .home-cta-btns { flex-direction: column; align-items: center; }
  .cta-banner-btns { flex-direction: column; align-items: center; }
  .product-card-btns { flex-direction: column; }
}

/* ===========================
   NAVIGATION FIX - v7 patch
   =========================== */

/* Top bar */
.header-top {
  background: #111;
  padding: 6px 0;
  border-bottom: 1px solid #2a2a2a;
  font-size: 0.78rem;
}
.header-top a { color: #aaa; transition: color 0.2s; }
.header-top a:hover { color: #fff; }

/* Spacer below fixed header */
.header-spacer {
  height: 110px; /* header-top(30px) + header-inner(72px) + border(8px) */
}

/* Nav link items */
.nav-link-item {
  color: #ccc;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
  position: relative;
}
.nav-link-item:hover { color: #fff; background: rgba(255,255,255,0.08); }

/* Dropdown wrapper */
.nav-dropdown-wrap {
  position: relative;
  display: inline-block;
}
.nav-dropdown-wrap:hover .nav-dropdown { display: block; }

/* Dropdown menu */
.nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #1e1e1e;
  border: 1px solid #333;
  border-radius: 6px;
  min-width: 200px;
  padding: 8px 0;
  z-index: 9999;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  list-style: none;
  margin: 0;
}
.nav-dropdown li { margin: 0; padding: 0; }
.nav-dropdown a {
  display: block;
  padding: 10px 18px;
  color: #ccc;
  font-size: 0.85rem;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.nav-dropdown a:hover { background: rgba(192,57,43,0.15); color: #fff; }

/* Mobile nav toggle fix */
.mobile-nav { display: none; }
.mobile-nav.open { display: block; }

/* Hamburger active state */
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .header-spacer { height: 88px; }
  .nav-dropdown-wrap { display: none; }
}