:root {
  --bg-page: #f3f4f6;
  --bg-surface: #ffffff;
  --bg-soft: #e5edff;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-strong: #1d4ed8;
  --text-main: #111827;
  --text-muted: #6b7280;
  --border-subtle: #e5e7eb;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.08);
}

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

html, body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

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

/* HEADER */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 4vw, 40px);
  backdrop-filter: blur(18px);
  background: rgba(248, 250, 252, 0.92);
  border-bottom: 1px solid rgba(209, 213, 219, 0.8);
}

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

.logo-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 14px;
}

.logo-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: var(--radius-pill);
  background: #f9fafb;
  border: 1px solid #e5e7eb;
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.18s ease-out;
}

.lang-btn.active {
  background: #2563eb;
  color: #ffffff;
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.5), 0 8px 18px rgba(37, 99, 235, 0.35);
}

/* LAYOUT */

main {
  padding: 26px clamp(20px, 4vw, 40px) 40px;
}

.hero {
  max-width: 1120px;
  margin: 0 auto 32px;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(260px, 2.2fr);
  gap: 32px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-text {
  background: var(--bg-surface);
  border-radius: 24px;
  padding: 20px 22px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin: 0 0 6px;
}

h1 {
  font-size: clamp(28px, 4.2vw, 36px);
  line-height: 1.1;
  margin: 0 0 8px;
}

.lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.3);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  font-weight: 600;
  font-size: 14px;
  color: #ffffff;
  box-shadow: 0 16px 28px rgba(37, 99, 235, 0.4);
  transition: transform 0.12s ease-out, box-shadow 0.12s ease-out, filter 0.12s ease-out;
}

.primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 36px rgba(37, 99, 235, 0.45);
  filter: brightness(1.02);
}

.secondary-text {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-card {
  background: #ffffff;
  border-radius: 20px;
  padding: 18px 18px 20px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.hero-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.hero-list li strong {
  color: var(--text-main);
}

.hero-image {
  margin: 0;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: #e5e7eb;
  box-shadow: var(--shadow-soft);
}

.hero-image img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 420px;
  object-fit: cover;
}

/* VIDEO SECTION */

.video-section {
  padding: 10px 0 30px;
}

.video-inner {
  max-width: 1120px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 22px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
  padding: 18px 18px 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 2fr);
  gap: 18px;
  align-items: center;
}

.video-text h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.video-text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
}

.video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: #000;
  border-radius: 18px;
  overflow: hidden;
}

.video-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* FEATURE GRID */

.feature-grid {
  max-width: 1120px;
  margin: 0 auto 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 18px 18px 18px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.feature-card h2 {
  margin: 0 0 8px;
  font-size: 17px;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* GALLERY */

.gallery {
  padding: 10px 0 26px;
}

.gallery-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.gallery-inner h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.gallery-grid figure {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: #e5e7eb;
  box-shadow: var(--shadow-soft);
}

.gallery-grid img {
  display: block;
  width: 100%;
  height: 210px;
  object-fit: cover;
}

/* SPECS */

.specs {
  padding: 4px 0 8px;
}

.specs-inner {
  max-width: 1120px;
  margin: 0 auto;
  border-radius: 22px;
  background: #ffffff;
  padding: 18px 18px 20px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.specs-inner h2 {
  margin-top: 0;
  font-size: 18px;
}

.spec-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 10px;
}

.spec-columns ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-muted);
  display: grid;
  gap: 6px;
}

/* DOWNLOADS & CONTACT */

.downloads {
  padding: 24px 0 10px;
}

.downloads-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.downloads-inner h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

.downloads-inner p {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--text-muted);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.download-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 14px 14px 16px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.download-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.download-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 8px 10px;
  margin-bottom: 6px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.4);
  color: var(--accent-strong);
  cursor: pointer;
  transition: background 0.12s ease-out, transform 0.12s ease-out, box-shadow 0.12s ease-out;
}

.download-btn.secondary {
  background: #ffffff;
}

.download-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.contact p {
  font-size: 13px;
  color: var(--text-muted);
}

.contact a {
  color: var(--accent-strong);
}

.social {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.social a {
  font-weight: 500;
  color: var(--accent-strong);
}

.social .sep {
  opacity: 0.5;
}

/* FOOTER */

.site-footer {
  border-top: 1px solid #e5e7eb;
  padding: 14px clamp(20px, 4vw, 40px) 18px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #f9fafb;
}

.dot {
  opacity: 0.5;
}

/* LANGUAGE VISIBILITY */

[data-lang] {
  display: none;
}

[data-lang].active-lang {
  display: inline;
}

.hero-text [data-lang].active-lang,
.video-text [data-lang].active-lang,
.gallery-inner [data-lang].active-lang,
.specs-inner [data-lang].active-lang,
.downloads-inner [data-lang].active-lang {
  display: block;
}

.hero-list li {
  display: none;
}

.hero-list li.active-lang {
  display: list-item;
}

.feature-card [data-lang].active-lang {
  display: block;
}

.spec-columns li {
  display: none;
}

.spec-columns li.active-lang {
  display: list-item;
}

.download-card {
  display: none;
}

.download-card.active-lang {
  display: block;
}

/* RESPONSIVE */

@media (max-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1.4fr);
  }

  .hero-image {
    order: -1;
  }
}

@media (max-width: 800px) {
  .feature-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .spec-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .site-header {
    padding-inline: 16px;
  }

  main {
    padding-inline: 16px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .spec-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .gallery-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .logo-main {
    font-size: 13px;
  }

  .logo-sub {
    font-size: 11px;
  }
}