*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1D1D1F;
  background: #FFFFFF;
  line-height: 1.5;
  overflow-x: hidden;
}

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

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

.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── NAVBAR ─── */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.navbar.scrolled {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.05);
  padding: 10px 0;
}

.nav-container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 600;
  color: #1D1D1F;
}

.nav-logo svg {
  color: #4CAF50;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: #86868B;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #1D1D1F;
}

.nav-cta {
  background: #4CAF50;
  color: #fff !important;
  padding: 6px 16px;
  border-radius: 20px;
  font-weight: 600 !important;
  transition: background 0.2s, transform 0.2s !important;
}

.nav-cta:hover {
  background: #388E3C !important;
  transform: scale(1.02);
}

/* ─── LANG TOGGLE ─── */

.nav-lang {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 20px;
  font-size: 12px;
  font-weight: 500;
  user-select: none;
}

.lang-option {
  cursor: pointer;
  color: #C7C7CC;
  transition: color 0.2s;
}

.lang-option:hover {
  color: #86868B;
}

.lang-option.active {
  color: #1D1D1F;
  font-weight: 700;
}

.navbar.scrolled .lang-option.active {
  color: #1D1D1F;
}

.lang-sep {
  color: #D2D2D7;
  font-weight: 300;
}

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #1D1D1F;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ─── HERO ─── */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: #4CAF50;
  background: rgba(76,175,80,0.08);
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(48px, 10vw, 80px);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.05;
  color: #1D1D1F;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 400;
  color: #86868B;
  line-height: 1.4;
  margin-bottom: 36px;
}

.hero-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #1D1D1F;
  color: #FFFFFF;
}

.btn-primary:hover {
  background: #000000;
  transform: scale(1.02);
}

.btn-secondary {
  background: transparent;
  color: #1D1D1F;
  border: 1.5px solid #D2D2D7;
}

.btn-secondary:hover {
  border-color: #1D1D1F;
  transform: scale(1.02);
}

.hero-mockup {
  margin-top: 48px;
  max-width: 280px;
  width: 100%;
}

.mockup-frame {
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.mockup-frame:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 80px rgba(0,0,0,0.15), 0 10px 30px rgba(0,0,0,0.08);
}

.mockup-landscape {
  max-width: 480px;
}

.mockup-frame img {
  width: 100%;
  height: auto;
}

/* ─── SECTIONS ─── */

.section {
  padding: 100px 0;
}

.section-alt {
  background: #F5F5F7;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #4CAF50;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.1;
  color: #1D1D1F;
  margin-bottom: 56px;
}

/* ─── FEATURES GRID ─── */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 32px 24px;
  border-radius: 18px;
  background: #F5F5F7;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(76,175,80,0.08);
  color: #4CAF50;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: #1D1D1F;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  font-weight: 400;
  color: #86868B;
  line-height: 1.6;
}

/* ─── SPLIT LAYOUT ─── */

.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.split-content {
  max-width: 480px;
}

.split-media {
  display: flex;
  justify-content: center;
}

.split-media .mockup-frame {
  max-width: 320px;
  width: 100%;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.feature-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.feature-list strong {
  font-size: 16px;
  font-weight: 600;
  color: #1D1D1F;
}

.feature-list span {
  font-size: 14px;
  font-weight: 400;
  color: #86868B;
  line-height: 1.6;
}

/* ─── STATS GRID ─── */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stat-badge {
  padding: 28px 24px;
  background: #FFFFFF;
  border: 1px solid #E8E8ED;
  border-radius: 16px;
  transition: border-color 0.2s, transform 0.2s;
}

.stat-badge:hover {
  border-color: #4CAF50;
  transform: translateY(-1px);
}

.stat-number {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #1D1D1F;
  margin-bottom: 4px;
}

.stat-label {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: #86868B;
  line-height: 1.5;
}

/* ─── OPENSOURCE ─── */

.opensource-section {
  text-align: center;
  background: #F5F5F7;
}

.opensource-content {
  max-width: 680px;
  margin: 0 auto;
}

.opensource-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 36px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: #1D1D1F;
  background: #FFFFFF;
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid #E8E8ED;
}

.badge svg {
  color: #4CAF50;
}

.opensource-text {
  font-size: 17px;
  font-weight: 400;
  color: #86868B;
  line-height: 1.7;
  margin-bottom: 36px;
}

.opensource-text strong {
  color: #1D1D1F;
}

.opensource-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── FOOTER ─── */

.footer {
  background: #1D1D1F;
  color: #FFFFFF;
  padding: 48px 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
}

.footer-brand svg {
  color: #4CAF50;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  font-weight: 400;
  color: #A1A1A6;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-copy {
  font-size: 12px;
  font-weight: 400;
  color: #636366;
  max-width: 400px;
}

/* ─── ANIMATIONS ─── */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ─── RESPONSIVE ─── */

@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .split-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .split-content {
    max-width: 100%;
  }

  .split-reverse .split-media {
    order: -1;
  }

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

  .section {
    padding: 72px 0;
  }

  .section-title {
    margin-bottom: 40px;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid #E8E8ED;
  }

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

  .nav-toggle {
    display: flex;
  }

  .nav-lang {
    margin-left: auto;
    margin-right: 12px;
  }

  .hero {
    padding: 100px 20px 60px;
  }

  .hero-mockup {
    max-width: 200px;
  }

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

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

  .section {
    padding: 56px 0;
  }

  .feature-card {
    padding: 24px 20px;
  }

  .container {
    padding: 0 20px;
  }
}