/* ============================================
   SN Fabrication — Industrial Theme
   ============================================ */

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

:root {
  --primary: #1b1b2f;
  --primary-light: #2d2d44;
  --accent: #f57c00;
  --accent-hover: #e65100;
  --accent-light: #fff3e0;
  --text: #333;
  --text-light: #666;
  --text-on-dark: #e0e0e0;
  --white: #ffffff;
  --light-bg: #f5f5f5;
  --border: #ddd;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);
  --radius: 6px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
}

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

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

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

ul {
  list-style: none;
}

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

/* --- Header --- */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
}

.logo span.accent {
  color: var(--accent);
}

/* --- Navigation --- */
.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  color: var(--text-on-dark);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 500;
  transition: all var(--transition);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(245, 124, 0, 0.2);
}

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

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--white);
  margin: 5px 0;
  border-radius: 2px;
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: 100px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(245,124,0,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-on-dark);
  margin-bottom: 35px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-small {
  padding: 60px 20px;
}

.hero-small h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.hero-small p {
  margin-bottom: 0;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(245, 124, 0, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

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

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

/* --- Sections --- */
.section {
  padding: 80px 20px;
}

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

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

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
}

.section-dark .section-title h2 {
  color: var(--white);
}

.section-title .underline {
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  margin: 0 auto 16px;
  border-radius: 2px;
}

.section-title p {
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.section-dark .section-title p {
  color: var(--text-on-dark);
}

/* --- Service Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 35px 30px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border-top: 4px solid transparent;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--accent);
}

.service-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--primary);
}

.service-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Features / Why Choose Us --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-item {
  text-align: center;
  padding: 30px 20px;
}

.feature-item .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.feature-item h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.section-dark .feature-item h3 {
  color: var(--accent);
}

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

.section-dark .feature-item p {
  color: var(--text-on-dark);
}

/* --- About Content --- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.about-text h2 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-image {
  background: var(--primary-light);
  border-radius: var(--radius);
  height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-dark);
  font-size: 1.1rem;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.stat-item {
  text-align: center;
  padding: 20px;
}

.stat-item .number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}

.stat-item .label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* --- Gallery Filter Tabs --- */
.gallery-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 35px;
}

.filter-btn {
  padding: 10px 22px;
  border: 2px solid var(--border);
  border-radius: 30px;
  background: var(--white);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

/* --- Gallery Grid --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  background: var(--primary-light);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-dark);
  cursor: pointer;
  transition: all 0.4s ease;
}

.gallery-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.gallery-item.hidden {
  display: none;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-item .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(27, 27, 47, 0.85));
  padding: 20px;
  color: var(--white);
  transform: translateY(100%);
  transition: transform var(--transition);
}

.gallery-item:hover .overlay {
  transform: translateY(0);
}

.gallery-item .overlay h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.gallery-item .overlay p {
  font-size: 0.85rem;
  color: var(--text-on-dark);
}

/* --- Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.lightbox.active {
  display: flex;
}

.lightbox-img {
  max-width: 90%;
  max-height: 80vh;
  border-radius: var(--radius);
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 25px;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2.5rem;
  cursor: pointer;
  z-index: 2001;
  line-height: 1;
  transition: color var(--transition);
}

.lightbox-close:hover {
  color: var(--accent);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
  padding: 16px 14px;
  border-radius: var(--radius);
  transition: background var(--transition);
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(245, 124, 0, 0.5);
}

.lightbox-prev {
  left: 20px;
}

.lightbox-next {
  right: 20px;
}

.lightbox-caption {
  color: var(--text-on-dark);
  margin-top: 16px;
  font-size: 1rem;
  text-align: center;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  max-width: 1200px;
  margin: 0 auto;
}

.contact-info h2 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.contact-info p {
  color: var(--text-light);
  margin-bottom: 30px;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-item .icon {
  font-size: 1.5rem;
  color: var(--accent);
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item h3 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: var(--primary);
}

.contact-item p {
  margin: 0;
  font-size: 0.95rem;
}

/* --- Form --- */
.contact-form {
  background: var(--white);
  padding: 35px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-form h2 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 25px;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: var(--white);
}

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

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

.form-submit {
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.form-submit:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(245, 124, 0, 0.4);
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--white);
  text-align: center;
  padding: 60px 20px;
}

.cta-banner h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 1.15rem;
  margin-bottom: 30px;
  opacity: 0.95;
}

.cta-banner .btn-outline {
  border-color: var(--white);
  color: var(--white);
}

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

/* --- Footer --- */
.site-footer {
  background: var(--primary);
  color: var(--text-on-dark);
  padding: 50px 20px 30px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-about h3,
.footer-links h3,
.footer-contact h3 {
  color: var(--white);
  font-size: 1.15rem;
  margin-bottom: 16px;
}

.footer-about p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-on-dark);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-on-dark);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-contact p {
  font-size: 0.9rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

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

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
  }

  .hero {
    padding: 60px 20px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .hero-small {
    padding: 40px 20px;
  }

  .hero-small h1 {
    font-size: 1.7rem;
  }

  .section {
    padding: 50px 20px;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-filters {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }

  .lightbox-prev,
  .lightbox-next {
    padding: 10px 10px;
    font-size: 1.5rem;
  }
}

@media (max-width: 560px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.6rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
}