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

:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --surface: #1e1e2a;
  --border: #2a2a3a;
  --text: #e8e8f0;
  --text-muted: #8888a0;
  --text-dim: #5a5a72;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --gradient: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #74b9ff 100%);
  --gradient-text: linear-gradient(135deg, #a29bfe 0%, #74b9ff 100%);
  --radius: 12px;
  --radius-lg: 20px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: rgba(108, 92, 231, 0.05);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.3s ease;
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.logo-zg {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}

.logo-text {
  font-size: 1.05rem;
  color: var(--text);
}

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

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

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

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

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

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 180px 0 100px;
  overflow: hidden;
  text-align: center;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108, 92, 231, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 92, 231, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  opacity: 0.4;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(108, 92, 231, 0.1);
  border: 1px solid rgba(108, 92, 231, 0.2);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.2;
}

.section-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 16px auto 0;
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s ease;
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(108, 92, 231, 0.3);
  transform: translateY(-4px);
}

.service-card.featured {
  border-color: rgba(108, 92, 231, 0.3);
  background: linear-gradient(180deg, rgba(108, 92, 231, 0.08) 0%, var(--bg-card) 100%);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(108, 92, 231, 0.1);
  border-radius: 12px;
  margin-bottom: 20px;
  color: var(--accent-light);
}

.service-icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.service-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-features li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
}

.service-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== Steps ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.step {
  position: relative;
}

.step-num {
  font-size: 3.5rem;
  font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.step p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ===== Demos ===== */
.demos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: block;
}

.demo-card:hover {
  border-color: rgba(108, 92, 231, 0.3);
  transform: translateY(-4px);
}

.demo-preview {
  aspect-ratio: 16/10;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
}

.demo-placeholder svg {
  width: 40px;
  height: 40px;
  opacity: 0.5;
}

.demo-placeholder span {
  font-size: 0.8rem;
}

.demo-card:hover .demo-placeholder {
  color: var(--accent-light);
}

.demo-card:hover .demo-placeholder svg {
  opacity: 1;
}

.demo-info {
  padding: 24px;
}

.demo-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.demo-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.demo-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Team ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 700px;
  margin: 0 auto;
}

.team-card {
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
}

.team-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  overflow: hidden;
  padding: 3px;
}

.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.team-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-role {
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 16px;
}

.team-bio {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== CTA ===== */
.section-cta {
  padding: 120px 0;
  position: relative;
  overflow: hidden;
}

.section-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  opacity: 0.25;
  pointer-events: none;
}

.cta-content {
  text-align: center;
  position: relative;
}

.cta-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.cta-content > p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 480px;
  margin: 0 auto 36px;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 24px;
}

.cta-or {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.cta-note {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 8px;
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.footer-bottom p {
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
}

/* ===== Animations ===== */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.service-card.animate-in:nth-child(2) { transition-delay: 0.1s; }
.service-card.animate-in:nth-child(3) { transition-delay: 0.2s; }

.step.animate-in:nth-child(2) { transition-delay: 0.1s; }
.step.animate-in:nth-child(3) { transition-delay: 0.2s; }

.demo-card.animate-in:nth-child(2) { transition-delay: 0.1s; }
.demo-card.animate-in:nth-child(3) { transition-delay: 0.2s; }

.team-card.animate-in:nth-child(2) { transition-delay: 0.1s; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-elevated);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 24px;
    transition: right 0.3s ease;
    border-left: 1px solid var(--border);
  }

  .nav-links.open {
    right: 0;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: 140px 0 80px;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .services-grid,
  .steps,
  .demos-grid {
    grid-template-columns: 1fr;
  }

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

  .cta-actions {
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .section {
    padding: 72px 0;
  }
}