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

:root {
  --bg:        #0a0a0f;
  --bg2:       #111118;
  --bg3:       #1a1a2e;
  --blue:      #3B82F6;
  --blue-h:    #2563EB;
  --purple:    #8B5CF6;
  --cyan:      #06B6D4;
  --text:      #E5E7EB;
  --text-dim:  #6B7280;
  --border:    rgba(255,255,255,0.08);
  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 4px 32px rgba(0,0,0,0.6);
}

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
code {
  background: var(--bg3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  color: var(--cyan);
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 96px 0; }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav.scrolled { background: rgba(10,10,15,0.98); }
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.nav-icon { width: 28px; height: 28px; object-fit: contain; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.nav-toggle { display: none; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
  border: none;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-engine {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  box-shadow: 0 4px 24px rgba(59,130,246,0.4);
}
.btn-engine:hover { box-shadow: 0 8px 32px rgba(59,130,246,0.6); filter: brightness(1.08); }

.btn-launcher {
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  color: #fff;
  box-shadow: 0 4px 24px rgba(139,92,246,0.4);
}
.btn-launcher:hover { box-shadow: 0 8px 32px rgba(139,92,246,0.6); filter: brightness(1.08); }

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  box-shadow: 0 2px 12px rgba(59,130,246,0.3);
}
.btn-sm:hover { box-shadow: 0 4px 20px rgba(59,130,246,0.5); filter: brightness(1.08); }

.btn-outline {
  background: transparent !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  box-shadow: none !important;
}
.btn-outline:hover {
  border-color: var(--blue) !important;
  color: var(--blue) !important;
  background: rgba(59,130,246,0.08) !important;
  box-shadow: none !important;
  filter: none !important;
}

/* ===== BADGES ===== */
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(59,130,246,0.15);
  color: var(--blue);
  border: 1px solid rgba(59,130,246,0.3);
  margin-bottom: 16px;
}
.badge-purple {
  background: rgba(139,92,246,0.15);
  color: var(--purple);
  border-color: rgba(139,92,246,0.3);
}

/* ===== SECTION HEADER ===== */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.section-header p { color: var(--text-dim); font-size: 1.05rem; }

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59,130,246,0.12) 0%, transparent 70%),
              radial-gradient(ellipse 60% 40% at 20% 60%, rgba(139,92,246,0.08) 0%, transparent 60%),
              radial-gradient(ellipse 60% 40% at 80% 80%, rgba(6,182,212,0.06) 0%, transparent 60%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
}
.hero-glow-1 {
  width: 600px; height: 600px;
  background: var(--blue);
  top: -200px; left: -100px;
}
.hero-glow-2 {
  width: 500px; height: 500px;
  background: var(--purple);
  bottom: -150px; right: -100px;
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-logo {
  width: clamp(120px, 20vw, 200px);
  height: auto;
  margin: 0 auto 32px;
  filter: drop-shadow(0 0 40px rgba(59,130,246,0.3));
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}
.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, #fff 0%, var(--blue) 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--text-dim);
  margin-bottom: 12px;
  font-weight: 500;
}
.hero-slogan {
  font-size: 0.95rem;
  color: var(--blue);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 48px;
  opacity: 0.9;
}
.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero-note {
  font-size: 0.85rem;
  color: var(--text-dim);
}
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s ease-in-out infinite;
  opacity: 0.4;
}
.hero-scroll svg { width: 28px; height: 28px; }
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ===== FEATURES ===== */
.features { background: var(--bg); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(59,130,246,0.12);
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.feature-card p { font-size: 0.88rem; color: var(--text-dim); line-height: 1.6; }

/* ===== STEPS ===== */
.start { background: var(--bg2); }
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  justify-content: center;
}
.step {
  flex: 1;
  max-width: 300px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  transition: border-color 0.2s, transform 0.2s;
}
.step:hover { border-color: rgba(139,92,246,0.4); transform: translateY(-4px); }
.step-num {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  font-size: 1.3rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 20px rgba(59,130,246,0.35);
}
.step-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-content p { font-size: 0.88rem; color: var(--text-dim); margin-bottom: 16px; }
.step-arrow {
  font-size: 2rem;
  color: var(--text-dim);
  align-self: center;
  padding: 0 16px;
  flex-shrink: 0;
  opacity: 0.4;
}

/* ===== ECOSYSTEM ===== */
.ecosystem { background: var(--bg); }
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.eco-card {
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border);
  transition: transform 0.2s, border-color 0.2s;
  text-align: center;
}
.eco-card:hover { transform: translateY(-4px); }
.eco-docs  { background: linear-gradient(135deg, rgba(59,130,246,0.08), rgba(99,102,241,0.05)); border-color: rgba(59,130,246,0.2); }
.eco-store { background: linear-gradient(135deg, rgba(139,92,246,0.08), rgba(168,85,247,0.05)); border-color: rgba(139,92,246,0.2); }
.eco-github { background: linear-gradient(135deg, rgba(6,182,212,0.08), rgba(16,185,129,0.05)); border-color: rgba(6,182,212,0.2); }
.eco-docs:hover  { border-color: rgba(59,130,246,0.4); }
.eco-store:hover { border-color: rgba(139,92,246,0.4); }
.eco-github:hover { border-color: rgba(6,182,212,0.4); }
.eco-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
}
.eco-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.eco-card p { font-size: 0.88rem; color: var(--text-dim); margin-bottom: 20px; line-height: 1.6; }

/* ===== CTA ===== */
.cta { background: var(--bg2); }
.cta-box {
  text-align: center;
  padding: 72px 48px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(59,130,246,0.08), rgba(139,92,246,0.08));
  border: 1px solid rgba(59,130,246,0.2);
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% -10%, rgba(59,130,246,0.12), transparent);
  pointer-events: none;
}
.cta-logo {
  width: 80px;
  height: auto;
  margin: 0 auto 24px;
  filter: drop-shadow(0 0 20px rgba(59,130,246,0.3));
}
.cta-box h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.cta-box > p {
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto 40px;
  font-size: 1rem;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-top {
  display: flex;
  gap: 64px;
  margin-bottom: 48px;
}
.footer-brand { max-width: 280px; }
.footer-logo { height: 36px; width: auto; margin-bottom: 16px; filter: brightness(0.85); }
.footer-brand p { font-size: 0.875rem; color: var(--text-dim); line-height: 1.7; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: color 0.2s, border-color 0.2s;
}
.footer-social a:hover { color: var(--text); border-color: var(--blue); }
.footer-links-group { display: flex; gap: 48px; flex: 1; justify-content: flex-end; }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; color: var(--text); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.06em; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.875rem; color: var(--text-dim); transition: color 0.2s; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger children */
.features-grid .feature-card:nth-child(1) { transition-delay: 0.05s; }
.features-grid .feature-card:nth-child(2) { transition-delay: 0.10s; }
.features-grid .feature-card:nth-child(3) { transition-delay: 0.15s; }
.features-grid .feature-card:nth-child(4) { transition-delay: 0.20s; }
.features-grid .feature-card:nth-child(5) { transition-delay: 0.25s; }
.features-grid .feature-card:nth-child(6) { transition-delay: 0.30s; }
.features-grid .feature-card:nth-child(7) { transition-delay: 0.35s; }
.features-grid .feature-card:nth-child(8) { transition-delay: 0.40s; }
.features-grid .feature-card:nth-child(9) { transition-delay: 0.45s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .ecosystem-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { flex-direction: column; gap: 40px; }
  .footer-brand { max-width: 100%; }
  .footer-links-group { justify-content: flex-start; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .ecosystem-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; align-items: center; gap: 24px; }
  .step { max-width: 100%; width: 100%; }
  .step-arrow { transform: rotate(90deg); padding: 0; }
  .hero-btns .btn { font-size: 0.9rem; padding: 12px 20px; }
  .nav-links { display: none; }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
  }
  .nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }
  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(10,10,15,0.98);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 4px;
  }
  .footer-links-group { flex-wrap: wrap; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .cta-box { padding: 48px 24px; }
  .section-header { margin-bottom: 40px; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-btns .btn { width: 100%; max-width: 320px; justify-content: center; }
}