:root {
  --bg: #050814;
  --bg-alt: #0b1020;
  --bg-accent: #10172a;
  --fg: #f9fafb;
  --fg-muted: #9ca3af;
  --accent: #ff6a2c; /* oranžinė, artima logotipui */
  --accent-soft: rgba(255, 106, 44, 0.12);
  --border-subtle: rgba(148, 163, 184, 0.3);
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Inter", "Segoe UI", sans-serif;
}

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

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

main {
  flex: auto;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: radial-gradient(circle at top, #111827 0, var(--bg) 55%);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Layout */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: radial-gradient(circle at top left, #111827 0, #020617 55%);
}

.section-accent {
  background: linear-gradient(135deg, #020617, #020617 30%, #111827 100%);
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.section-header {
  max-width: 720px;
  margin: 0 auto 2rem;
  text-align: left;
}

.section-header h2 {
  font-size: clamp(1.8rem, 2.4vw, 2.2rem);
  margin-bottom: 0.75rem;
}

.section-header p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.9),
    rgba(15, 23, 42, 0.4),
    transparent
  );
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--fg);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  flex-shrink: 0;
}

.brand-name {
  font-weight: 600;
  letter-spacing: 0.03em;
}

/* Navigation */

.site-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.site-nav a {
  font-size: 0.92rem;
  color: var(--fg-muted);
  text-decoration: none;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.2s ease-out;
}

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

.site-nav a:hover::after {
  width: 100%;
}

/* Mobile nav */

.nav-toggle {
  display: none;
  width: 36px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.6);
  justify-content: center;
  align-items: center;
  gap: 4px;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
}

/* Hero */

.hero {
  padding: 4.5rem 0 4rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.1fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.1rem, 2.9vw, 2.8rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-subtitle {
  margin: 0 0 1.25rem;
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.badge {
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.45);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero-footnote {
  margin: 0;
  font-size: 0.85rem;
  color: var(--fg-muted);
  max-width: 30rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease-out, transform 0.12s ease-out,
    box-shadow 0.15s ease-out, border-color 0.15s ease-out, color 0.15s ease-out;
}

.btn-primary {
  background: var(--accent);
  color: #111827;
  box-shadow: 0 13px 30px rgba(248, 113, 22, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 38px rgba(248, 113, 22, 0.6);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.7);
  color: var(--fg);
  border-color: rgba(148, 163, 184, 0.5);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.9);
  border-color: var(--accent);
}

/* Hero media */

.hero-media {
  display: flex;
  justify-content: flex-end;
}

.media-frame {
  width: 100%;
  max-width: 420px;
  background: radial-gradient(circle at top left, #1f2937 0, #020617 60%);
  border-radius: 26px;
  padding: 1rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.media-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  margin-bottom: 0.5rem;
}

.media-placeholder {
  border-radius: 20px;
  border: 1px dashed rgba(148, 163, 184, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.85);
  color: var(--fg-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 1rem;
}

.media-placeholder img {
  max-width: 100%;
  border-radius: 16px;
}

/* Cards / grids */

.grid {
  display: grid;
  gap: 1.5rem;
}

.features-grid {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  border-radius: var(--radius-lg);
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 1.4rem 1.4rem 1.3rem;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.65);
}

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Security */

.security-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1.1fr);
  gap: 2rem;
  align-items: start;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.8rem;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.checklist li strong {
  color: var(--fg);
}

.checklist span {
  font-size: 1.2rem;
}

.security-card {
  border-radius: var(--radius-xl);
  background: radial-gradient(
    circle at top,
    #020617 0,
    #020617 40%,
    #111827 100%
  );
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow-soft);
  font-size: 0.95rem;
  color: var(--fg-muted);
}

/* Downloads */

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

.download-card {
  border-radius: var(--radius-lg);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 1.4rem 1.4rem 1.25rem;
}

.download-card h3 {
  margin: 0 0 0.85rem;
}

.download-meta {
  margin: 0.75rem 0 0;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.downloads-footnote {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* Case studies */

.case-list {
  display: grid;
  gap: 1.4rem;
}

.case-card {
  border-radius: var(--radius-lg);
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 1.4rem 1.4rem 1.3rem;
}

.case-card h3 {
  margin: 0 0 0.6rem;
}

.case-card p {
  margin: 0 0 0.9rem;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.case-link {
  color: var(--accent);
  font-size: 0.9rem;
  text-decoration: none;
}

.case-link:hover {
  text-decoration: underline;
}

.case-card-placeholder {
  border-style: dashed;
}

/* GitHub section */

.github-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.1fr);
  gap: 2rem;
  align-items: start;
}

.github-meta ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  background: #020617;
  padding: 1.2rem 0 1.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--fg-muted);
}

.footer-note {
  opacity: 0.9;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-inner,
  .security-grid,
  .github-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-media {
    order: -1;
    justify-content: flex-start;
  }

  .media-frame {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 3rem 0;
  }

  .hero {
    padding-top: 3.3rem;
  }

  .header-inner {
    padding: 0.6rem 0;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    right: 1.25rem;
    padding: 0.75rem 0.85rem;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9);
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    min-width: 180px;
    transform-origin: top right;
    transform: scale(0.9);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease-out, transform 0.15s ease-out;
  }

  .site-nav.nav-open {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
  }

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

  .hero-inner {
    gap: 2rem;
  }

  .site-header.is-scrolled {
    background: rgba(15, 23, 42, 0.95);
    border-bottom-color: rgba(148, 163, 184, 0.3);
  }

  .hero-media {
    display: flex;
    justify-content: flex-end;
  }
}