/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #2c3e50;
  --color-accent: #3498db;
  --color-accent-hover: #2980b9;
  --color-bg: #f8f9fa;
  --color-white: #ffffff;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #e0e0e0;
  --color-footer-bg: #2c3e50;
  --color-footer-text: #ecf0f1;
  --max-width: 1100px;
  --radius: 6px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-accent-hover);
}

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

/* === Header === */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 50px;
  width: auto;
}

/* Navigation */
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 0.25rem;
}

.main-nav a {
  display: block;
  padding: 0.5rem 0.9rem;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--color-accent);
  color: var(--color-white);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-primary);
  padding: 0.5rem;
}

/* === Hero === */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #34495e 100%);
  color: var(--color-white);
  text-align: center;
  padding: 3.5rem 1.5rem;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* === Main Content === */
.main-content {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

/* === Product Grid === */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

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

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.product-card-image {
  background: #f5f5f5;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
}

.product-card-image img {
  width: 140px;
  height: 140px;
  object-fit: contain;
}

.product-card-body {
  padding: 1rem 1.25rem 1.25rem;
}

.product-card-body h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
}

/* === Category Section === */
.category-section {
  margin-bottom: 2.5rem;
}

.category-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 0;
}

/* === Page Header (for subpages) === */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, #34495e 100%);
  color: var(--color-white);
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.page-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
}

/* === About / Text Content === */
.text-content {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  line-height: 1.8;
}

.text-content p {
  margin-bottom: 1rem;
}

.text-content p:last-child {
  margin-bottom: 0;
}

/* === Contact Page === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.contact-info {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
}

.contact-info h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.contact-info-item {
  margin-bottom: 1rem;
}

.contact-info-item strong {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-light);
  margin-bottom: 0.2rem;
}

.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
}

.contact-form h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

.btn {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* === Footer === */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
}

.footer-section h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-white);
}

.footer-section p,
.footer-section a {
  font-size: 0.85rem;
  color: #bdc3c7;
  line-height: 1.8;
}

.footer-section a:hover {
  color: var(--color-white);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.3rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  padding: 1rem 1.5rem;
  font-size: 0.8rem;
  color: #7f8c8d;
}

/* === Responsive === */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .main-nav a {
    padding: 0.75rem 1rem;
    border-radius: 0;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}