* {
  box-sizing: border-box;
}

:root {
  --brand-accent: #2563eb;
  --text-900: #111827;
  --text-700: #374151;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #fdfdfd;
  color: #1f2937;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: rgba(253, 253, 253, 0.95);
  border-bottom: 1px solid #ececec;
  backdrop-filter: blur(6px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  height: 36px;
  width: auto;
  display: block;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #111827;
}

.site-nav a {
  position: relative;
  text-decoration: none;
  color: var(--text-700);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav a:hover {
  color: var(--text-900);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--brand-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.18s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav a.is-active {
  color: var(--text-900);
}

.site-nav a.is-active::after {
  transform: scaleX(1);
}

.lang-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
}

.lang-dropdown {
  position: relative;
}

.lang-trigger {
  list-style: none;
  border: 1px solid #e5e7eb;
  border-radius: 999px;
  padding: 5px 10px;
  background: #fff;
  color: #111827;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.lang-trigger::-webkit-details-marker {
  display: none;
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 104px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  box-shadow: 0 10px 20px rgba(16, 24, 40, 0.1);
  padding: 6px;
  display: grid;
  gap: 4px;
  z-index: 20;
}

.lang-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: #111827;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 8px;
  border-radius: 8px;
}

.lang-item:hover {
  background: #f3f4f6;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: #374151;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.back-btn:hover {
  color: #111827;
}

.page {
  min-height: calc(100vh - 72px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 16px 24px 20px;
}

.intro-image {
  width: min(560px, 85vw);
  height: auto;
  display: block;
  transform: translateY(-10px);
  animation: intro-float 4.6s ease-in-out infinite;
  will-change: transform;
}

@keyframes intro-float {
  0%,
  100% {
    transform: translateY(-10px);
  }
  50% {
    transform: translateY(-16px);
  }
}

.app-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.app-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  gap: 10px;
  padding: 14px 18px;
  border: 1px solid #eceff4;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 20px rgba(16, 24, 40, 0.08);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: box-shadow 0.16s ease, border-color 0.16s ease;
}

.app-icon {
  width: 92px;
  height: 92px;
  border-radius: 22px;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.app-link:hover .app-icon,
.app-link:focus-visible .app-icon {
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.2);
}

.app-link:hover,
.app-link:focus-visible {
  box-shadow: 0 14px 24px rgba(16, 24, 40, 0.12);
  border-color: #d1d9e8;
}

.app-title {
  font-size: 16px;
  font-weight: 700;
  text-align: center;
}

.build-wrap {
  width: min(980px, 100%);
  margin-top: 8px;
  display: grid;
  gap: 14px;
}

.build-head {
  text-align: center;
}

.build-kicker {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #64748b;
}

.build-title {
  margin: 6px 0 0;
  font-size: 26px;
  line-height: 1.2;
  color: #0f172a;
}

.build-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.build-card {
  background: #fff;
  border: 1px solid #ebedf2;
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 8px 16px rgba(16, 24, 40, 0.05);
}

.build-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: #111827;
}

.build-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: #4b5563;
  font-weight: 600;
}

.case-wrap {
  width: min(980px, 100%);
  margin-top: 4px;
  display: grid;
  gap: 16px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

.case-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.case-app-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.14);
  flex-shrink: 0;
}

.case-app-name {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
}

.case-head {
  text-align: center;
}

.case-kicker {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #64748b;
}

.case-title {
  margin: 6px 0 0;
  font-size: 28px;
  color: #0f172a;
}

.case-card {
  background: linear-gradient(140deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid #e8edf5;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 20px rgba(16, 24, 40, 0.06);
  display: grid;
  gap: 14px;
}

.case-block h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: #111827;
}

.case-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: #4b5563;
  font-weight: 600;
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  background: #fff;
  border: 1px solid #e9edf3;
  border-radius: 12px;
  padding: 10px;
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
}

.metric-label {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: #6b7280;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.case-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 10px 14px;
  border-radius: 10px;
  background: #111827;
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.case-cta:hover {
  background: #0b1220;
}

.stack-wrap {
  width: min(980px, 100%);
  margin-top: 4px;
  display: grid;
  gap: 12px;
}

.stack-head {
  text-align: center;
}

.stack-kicker {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #64748b;
}

.stack-title {
  margin: 6px 0 0;
  font-size: 24px;
  line-height: 1.25;
  color: #0f172a;
}

.stack-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.stack-chip {
  background: #fff;
  border: 1px solid #e7ebf1;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  color: #334155;
  box-shadow: 0 6px 14px rgba(16, 24, 40, 0.05);
}

.site-footer {
  border-top: 1px solid #eceff3;
  background: #fcfcfd;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-copy {
  margin: 0;
  color: #6b7280;
  font-size: 13px;
  font-weight: 700;
}

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.footer-links a {
  text-decoration: none;
  color: #374151;
  font-size: 13px;
  font-weight: 700;
}

.footer-links a:hover {
  color: #111827;
}

@media (max-width: 640px) {
  .site-header {
    height: 64px;
    padding: 0 14px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .brand-logo {
    height: 32px;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px;
    background: rgba(253, 253, 253, 0.98);
    border-bottom: 1px solid #eceff3;
    box-shadow: 0 10px 20px rgba(16, 24, 40, 0.08);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    font-size: 14px;
    letter-spacing: 0.06em;
  }

  .lang-switch {
    margin-left: 0;
  }

  .lang-menu {
    right: auto;
    left: 0;
  }

  .page {
    min-height: calc(100vh - 64px);
    justify-content: flex-start;
    gap: 18px;
    padding: 14px 14px 16px;
  }

  .intro-image {
    width: min(420px, 76vw);
    transform: translateY(-4px);
    animation: intro-float-mobile 4.4s ease-in-out infinite;
    will-change: transform;
  }

  @keyframes intro-float-mobile {
    0%,
    100% {
      transform: translateY(-4px);
    }
    50% {
      transform: translateY(-8px);
    }
  }

  .app-icon {
    width: 84px;
    height: 84px;
    border-radius: 20px;
  }

  .app-title {
    font-size: 15px;
  }

  .build-wrap {
    gap: 10px;
  }

  .build-title {
    font-size: 22px;
  }

  .build-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .case-title {
    font-size: 24px;
  }

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

  .case-card {
    gap: 12px;
  }

  .case-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stack-title {
    font-size: 21px;
  }

  .stack-grid {
    justify-content: flex-start;
  }

  .footer-inner {
    padding: 12px 14px;
    flex-direction: column;
    align-items: flex-start;
  }
}