/* ZKRFIC Electronics - Professional B2B Website Styles */

:root {
  --primary: #0a4d8c;
  --primary-dark: #083a6b;
  --primary-light: #1a6bb5;
  --accent: #00a3e0;
  --text: #1a1a2e;
  --text-light: #4a5568;
  --bg: #ffffff;
  --bg-light: #f7fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --success: #10b981;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: var(--bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--primary);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 0.9rem;
}

.nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav a {
  font-weight: 500;
  color: var(--text);
  position: relative;
}

.nav a:hover,
.nav a.active {
  color: var(--primary);
}

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.btn-accent {
  background: var(--accent);
  color: white;
}

.btn-accent:hover {
  background: #0088c0;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 50%, var(--primary) 100%);
  color: white;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 680px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.stat-item h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.9rem;
  opacity: 0.75;
  margin: 0;
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 50px;
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-light);
  font-size: 1.1rem;
}

.bg-light {
  background: var(--bg-light);
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  background: white;
  padding: 32px 28px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--border);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: white;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Categories */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.category-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-img {
  height: 140px;
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.category-body {
  padding: 20px;
}

.category-body h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.category-body p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  background: white;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
}

.product-img {
  height: 160px;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.product-body {
  padding: 20px;
}

.product-body .brand {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-body h3 {
  font-size: 1.05rem;
  margin: 6px 0 8px;
  color: var(--text);
}

.product-body .desc {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-content h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.about-content p {
  color: var(--text-light);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-list {
  list-style: none;
  margin-top: 24px;
}

.about-list li {
  padding: 10px 0;
  padding-left: 32px;
  position: relative;
  color: var(--text);
}

.about-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}

.about-image {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px;
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 4rem;
  font-weight: 800;
}

/* Inquiry Form */
.inquiry-section {
  background: var(--bg-light);
}

.form-container {
  max-width: 720px;
  margin: 0 auto;
  background: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
  background: white;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 77, 140, 0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 12px;
  text-align: center;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.contact-card {
  background: white;
  padding: 32px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.contact-card .icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.4rem;
  color: white;
}

.contact-card h3 {
  margin-bottom: 8px;
}

.contact-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 70px 0;
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta p {
  opacity: 0.9;
  margin-bottom: 28px;
  font-size: 1.1rem;
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: #cbd5e1;
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer h4 {
  color: white;
  font-size: 1rem;
  margin-bottom: 16px;
  font-weight: 600;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 10px;
}

.footer ul a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer ul a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #64748b;
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--bg-dark), var(--primary));
  color: white;
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 2.4rem;
  margin-bottom: 10px;
}

.page-header p {
  opacity: 0.85;
  font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero-stats {
    gap: 28px;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }
  
  .nav.open {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    flex-wrap: wrap;
    gap: 24px;
  }
  
  .hero {
    padding: 70px 0 50px;
  }
  
  .section {
    padding: 50px 0;
  }
}

/* Utility */
.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}