/* ===== CSS Variables & Reset ===== */
:root {
  --primary: #0a0e27;
  --primary-light: #1a1f3a;
  --accent: #ffd700;
  --accent-hover: #e6c200;
  --text: #ffffff;
  --text-muted: #b0b3c5;
  --bg-card: rgba(26, 31, 58, 0.6);
  --bg-glass: rgba(10, 14, 39, 0.7);
  --border-glass: rgba(255, 215, 0, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: var(--font);
  background: var(--primary);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; font-size: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ===== Dark Mode (default is dark) ===== */
body.light-mode {
  --primary: #f5f7fa;
  --primary-light: #e8ecf1;
  --text: #1a1f3a;
  --text-muted: #5a5e7a;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --border-glass: rgba(10, 14, 39, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--primary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }

/* ===== Header & Nav ===== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition);
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { flex-shrink: 0; }
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}
.nav-links a:hover::after { width: 100%; }
.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}
.nav-actions button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  color: var(--text);
}
.nav-actions button:hover { background: var(--bg-card); }
#mobile-menu-toggle { display: none; }

/* Search Bar */
.search-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 24px 20px;
  transition: var(--transition);
}
.search-bar form {
  display: flex;
  gap: 8px;
}
.search-bar input {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass);
  background: var(--primary-light);
  color: var(--text);
  font-size: 1rem;
  transition: var(--transition);
}
.search-bar input:focus { outline: none; border-color: var(--accent); }
.search-bar button {
  padding: 12px 24px;
  background: var(--accent);
  color: var(--primary);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: var(--transition);
}
.search-bar button:hover { background: var(--accent-hover); }

/* ===== Hero Section ===== */
#hero {
  padding-top: var(--header-height);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%);
}
body.light-mode #hero {
  background: linear-gradient(135deg, #e8ecf1 0%, #f5f7fa 50%, #e8ecf1 100%);
}
.hero-slider {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 24px;
  position: relative;
}
.slide {
  display: none;
  animation: fadeSlide 0.6s ease;
}
.slide.active { display: block; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.slide-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.slide-content h1, .slide-content h2 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}
.slide-content .highlight { color: var(--accent); }
.slide-content .subtitle {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 600;
}
.slide-content .description {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.cta-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3); }
.btn-secondary {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}
.btn-secondary:hover { background: var(--accent); color: var(--primary); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
  padding: 10px 24px;
  font-size: 0.9rem;
}
.btn-outline:hover { background: var(--accent); color: var(--primary); }

.slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
}
.slider-prev, .slider-next {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--text);
  transition: var(--transition);
  border: 1px solid var(--border-glass);
}
.slider-prev:hover, .slider-next:hover { background: var(--accent); color: var(--primary); }
.slider-dots { display: flex; gap: 10px; }
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.dot.active { background: var(--accent); transform: scale(1.2); }

/* ===== Section Common ===== */
.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}
section h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
  position: relative;
}
section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.about-text p {
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 1.05rem;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.stat {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.stat:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-number {
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}
.stat-label { color: var(--text-muted); font-size: 0.95rem; }

/* ===== Story Timeline ===== */
.story-timeline {
  position: relative;
  padding-left: 40px;
}
.story-timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
}
.timeline-item {
  position: relative;
  margin-bottom: 48px;
  animation: fadeUp 0.6s ease forwards;
  opacity: 0;
}
.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.timeline-year {
  position: absolute;
  left: -40px;
  top: 0;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  white-space: nowrap;
}
.timeline-content {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.timeline-content:hover { transform: translateX(8px); }
.timeline-content h3 { font-size: 1.2rem; margin-bottom: 8px; }
.timeline-content p { color: var(--text-muted); }

/* ===== Team ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}
.team-member {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.team-member:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.member-avatar { margin-bottom: 16px; }
.member-avatar svg { margin: 0 auto; }
.team-member h3 { font-size: 1.2rem; margin-bottom: 4px; }
.member-role { color: var(--accent); font-weight: 600; margin-bottom: 12px; font-size: 0.9rem; }
.team-member p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== Products ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}
.product-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-icon { margin-bottom: 20px; }
.product-icon svg { margin: 0 auto; }
.product-card h3 { font-size: 1.3rem; margin-bottom: 12px; }
.product-card p { color: var(--text-muted); margin-bottom: 20px; font-size: 0.95rem; }

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.service-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.service-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.service-item h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--accent); }
.service-item p { color: var(--text-muted); font-size: 0.95rem; }

/* ===== Solutions ===== */
.solutions-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.solutions-content p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.05rem; }
.solutions-content ul { text-align: left; margin-bottom: 32px; }
.solutions-content li {
  padding: 10px 0 10px 28px;
  position: relative;
  color: var(--text-muted);
}
.solutions-content li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}
.solutions-content .btn { margin-top: 8px; }

/* ===== Industries ===== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.industry-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
  text-align: center;
}
.industry-item:hover { transform: translateY(-4px); }
.industry-item h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--accent); }
.industry-item p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}
.feature-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.feature-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-item svg { margin: 0 auto 16px; }
.feature-item h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--accent); }
.feature-item p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== Advantages ===== */
.advantages-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.advantage-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.advantage-item:hover { transform: translateY(-4px); }
.advantage-item h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--accent); }
.advantage-item p { color: var(--text-muted); }

/* ===== Testimonials ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.testimonial {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
  font-style: italic;
}
.testimonial:hover { transform: translateY(-4px); }
.testimonial p { margin-bottom: 16px; color: var(--text); font-size: 1rem; }
.testimonial footer { color: var(--accent); font-style: normal; font-weight: 600; }

/* ===== Case Studies ===== */
.case-study {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.case-study:hover { transform: translateX(8px); }
.case-study h3 { font-size: 1.15rem; margin-bottom: 12px; color: var(--accent); }
.case-study p { color: var(--text-muted); }

/* ===== Insights ===== */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.insight {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.insight:hover { transform: translateY(-4px); }
.insight h3 { font-size: 1.1rem; margin-bottom: 12px; }
.insight p { color: var(--text-muted); margin-bottom: 16px; font-size: 0.9rem; }
.insight a { font-weight: 600; }

/* ===== Knowledge ===== */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.knowledge-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}
.knowledge-item:hover { transform: translateY(-4px); }
.knowledge-item h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--accent); }
.knowledge-item p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  margin-bottom: 16px;
  border: 1px solid var(--border-glass);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent);
  transition: var(--transition);
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== HowTo ===== */
.howto-steps {
  max-width: 700px;
  margin: 0 auto;
  counter-reset: step;
}
.howto-steps li {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  align-items: flex-start;
  animation: fadeUp 0.5s ease forwards;
  opacity: 0;
}
.howto-steps li:nth-child(1) { animation-delay: 0.1s; }
.howto-steps li:nth-child(2) { animation-delay: 0.2s; }
.howto-steps li:nth-child(3) { animation-delay: 0.3s; }
.howto-steps li:nth-child(4) { animation-delay: 0.4s; }
.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
}
.step-content h3 { font-size: 1.15rem; margin-bottom: 4px; }
.step-content p { color: var(--text-muted); }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info p {
  margin-bottom: 16px;
  font-size: 1.05rem;
}
.contact-info strong { color: var(--accent); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form label { font-weight: 500; font-size: 0.95rem; }
.contact-form input, .contact-form textarea {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass);
  background: var(--primary-light);
  color: var(--text);
  transition: var(--transition);
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent); }
.contact-form button { align-self: flex-start; }

/* ===== Footer ===== */
#footer {
  background: var(--primary-light);
  border-top: 1px solid var(--border-glass);
}
.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--accent);
}
.footer-col p { color: var(--text-muted); font-size: 0.9rem; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.9rem; }
.footer-col ul li a:hover { color: var(--accent); }
.social-links { display: flex; gap: 12px; }
.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.social-links a:hover { background: var(--accent); }
.social-links a:hover svg { fill: var(--primary); }
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-bottom p { margin-bottom: 4px; }

/* ===== Back to Top ===== */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
  transition: var(--transition);
  z-index: 999;
}
#back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 16px;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
    border-bottom: 1px solid var(--border-glass);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  #mobile-menu-toggle { display: flex; }
  .slide-content h1, .slide-content h2 { font-size: 2.2rem; }
  .slide-content .subtitle { font-size: 1.1rem; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  section h2 { font-size: 1.8rem; }
  .section-container { padding: 60px 16px; }
  .stat-number { font-size: 2rem; }
  .story-timeline { padding-left: 32px; }
  .timeline-year { left: -32px; font-size: 0.8rem; padding: 2px 10px; }
}

@media (max-width: 480px) {
  .slide-content h1, .slide-content h2 { font-size: 1.8rem; }
  .btn { padding: 12px 28px; font-size: 0.9rem; }
  .products-grid, .services-grid, .team-grid { grid-template-columns: 1fr; }
  .cta-group { flex-direction: column; align-items: center; }
  .nav-container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  #back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}

/* ===== Scroll Animations (intersection observer fallback) ===== */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }
}