:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #102a2a;
  --muted: #4a6363;
  --accent: #0f8b7b;
  --accent-2: #2f7fd1;
  --border: #d0dce8;
  --header-text: #1a2d4a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--text);
  background: #ffffff;
  min-height: 100vh;
}

.backdrop {
  display: none;
}

.site-header {
  max-width: 1040px;
  margin: 8px auto 0;
  padding: 20px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 0;
  background: transparent;
  border: none;
}

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

.brand-name {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.16em;
  background: linear-gradient(135deg, #1e4f95 0%, #103d7a 35%, #0c2f62 70%, #08254f 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@media (max-width: 840px) {
  .brand-name {
    font-size: 18px;
  }
}

.header-link {
  color: var(--header-text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  font-weight: 600;
}

.header-link:hover {
  border-color: #1a6bc4;
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 18px;
}

.hero {
  background: #f4f8ff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 4.2vw, 54px);
  line-height: 1.05;
  max-width: 800px;
}

.hero-copy {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.45;
  max-width: 700px;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.products {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.features {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.feature-card h2 {
  font-size: 22px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  background: #f4f8ff;
}

h2 {
  margin: 0;
  font-size: 24px;
}

h3 {
  margin: 0;
  font-size: 22px;
}

.card p,
.payments p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.price-tag {
  margin: 6px 0 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-strong);
}

.includes-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.includes-list li {
  margin: 6px 0;
}

.screenshots {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.screenshot-card img {
  margin-top: 12px;
  width: 100%;
  max-height: 820px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #eef3fb;
}

.screenshot-card img.chart-shot {
  max-height: 900px;
}

.screenshot-card img.logic-shot {
  max-height: 980px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 10px;
  padding: 0 14px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 8px 22px rgba(0, 109, 91, 0.25);
}

.btn-secondary {
  color: var(--text);
  border-color: var(--border);
  background: #fff;
}

.btn-disabled {
  opacity: 0.55;
  pointer-events: none;
}

.payments {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  background: #f4f8ff;
}

code {
  font-family: "Consolas", "Courier New", monospace;
  background: #f1f5f4;
  border: 1px solid #deeaeb;
  border-radius: 6px;
  padding: 1px 6px;
}

.site-footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px 18px 36px;
  color: var(--muted);
}

.contact-link {
  color: #1a6bc4;
  font-weight: 700;
}

@media (max-width: 840px) {
  .hero {
    padding: 22px;
  }

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

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

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