:root {
  --bg-1: #0f172a;
  --bg-2: #1e293b;
  --surface: #ffffff;
  --text: #0f172a;
  --text-dim: #475569;
  --suma: #22c55e;
  --resta: #f97316;
  --multi: #3b82f6;
  --divi: #a855f7;
  --pill-bg: #0b1220;
  --pill-bg-hover: #111c2f;
  --pill-border: #334155;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Poppins", sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2));
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 40px;
  color: #fff;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 1px;
}

.logo img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.lang-selector {
  display: flex;
  gap: 8px;
  font-size: 14px;
}

.lang-btn {
  border: 1px solid var(--pill-border);
  background: var(--pill-bg);
  color: #e2e8f0;
  cursor: pointer;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 11px;
}

.lang-btn:hover {
  background: var(--pill-bg-hover);
}

.lang-btn.is-active {
  background: #1e293b;
  border-color: #64748b;
  color: #f8fafc;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero,
.grid-container,
.visual-demo,
.stats-preview,
.seo-content,
.faq,
footer {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.hero {
  text-align: center;
  color: #fff;
  padding: 24px 0 36px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 12px;
}

.hero p {
  margin: 0 auto 22px;
  max-width: 760px;
  color: #cbd5e1;
}

.btn-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--pill-bg);
  color: #e2e8f0;
  border: 1px solid var(--pill-border);
  text-decoration: none;
  border-radius: 999px;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.store-btn {
  min-width: 255px;
}

.store-icon {
  display: inline-flex;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.store-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.grid-title {
  grid-column: 1 / -1;
  margin: 0;
  color: #f8fafc;
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
}

.card {
  background: rgba(11, 18, 32, 0.92);
  border: 1px solid var(--pill-border);
  border-radius: 14px;
  padding: 20px;
}

.icon-box {
  font-size: 1.3rem;
}

.card h3 {
  margin: 10px 0 8px;
  color: #f8fafc;
}

.card p {
  margin: 0;
  color: #cbd5e1;
}

.suma {
  border-top: 5px solid var(--suma);
}

.resta {
  border-top: 5px solid var(--resta);
}

.multi {
  border-top: 5px solid var(--multi);
}

.divi {
  border-top: 5px solid var(--divi);
}

.visual-demo {
  background: rgba(11, 18, 32, 0.92);
  border: 1px solid var(--pill-border);
  border-radius: 14px;
  padding: 26px;
  margin-bottom: 20px;
}

.video-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  background: #020617;
}

.video-wrapper iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.stats-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  background: rgba(11, 18, 32, 0.92);
  border: 1px solid var(--pill-border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 22px;
}

.stats-text h2 {
  margin: 0 0 8px;
  color: #f8fafc;
}

.stats-text p {
  margin: 0;
  color: #cbd5e1;
}

.seo-content,
.faq {
  background: rgba(11, 18, 32, 0.92);
  border: 1px solid var(--pill-border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 20px;
}

.seo-content h2,
.faq h2 {
  margin: 0 0 10px;
  color: #f8fafc;
}

.seo-content > p {
  margin: 0 0 18px;
  color: #cbd5e1;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.seo-item {
  background: #0b1220;
  border: 1px solid var(--pill-border);
  border-radius: 12px;
  padding: 14px;
}

.seo-item h3,
.faq-item h3 {
  margin: 0 0 8px;
  color: #f8fafc;
}

.seo-item p,
.faq-item p {
  margin: 0;
  color: #cbd5e1;
}

.faq-item + .faq-item {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(100, 116, 139, 0.35);
}

footer {
  color: #e2e8f0;
  text-align: center;
  padding: 10px 0 28px;
}

footer p {
  margin: 0;
}

footer a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 760px) {
  header {
    padding: 20px;
  }

  .logo {
    gap: 8px;
    font-size: 0.95rem;
  }

  .logo img {
    width: 28px;
    height: 28px;
  }

  .store-btn {
    width: min(100%, 330px);
  }

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