@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #060606;
  --bg-alt: #0d0d0f;
  --fg: #f5f7ff;
  --muted: #adb6ce;
  --accent: #7c5cff;
  --accent-soft: rgba(124, 92, 255, 0.16);
  --accent-2: #06d6a0;
  --card: rgba(13, 13, 15, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --shadow: 0 30px 60px rgba(7, 10, 35, 0.35);
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1080px;
  --transition: 240ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

body {
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  background: radial-gradient(circle at top left, rgba(124, 92, 255, 0.15), transparent 45%),
              radial-gradient(circle at bottom right, rgba(6, 214, 160, 0.15), transparent 45%),
              var(--bg);
  color: var(--fg);
  line-height: 1.7;
  margin: 0;
}

.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;
}

main, .page-content {
  max-width: var(--max-width);
  margin: 0 auto 5rem;
  padding: 2.5rem 1.75rem 0;
}

.wrapper {
  width: 100%;
}

section[id] {
  scroll-margin-top: 110px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--fg);
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--muted);
  margin: 0.4rem 0 1.2rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(6, 6, 6, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.1rem 1.75rem;
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
  transition: color var(--transition);
}

.site-title:hover,
.site-title:focus {
  color: var(--accent);
}

.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
}

.nav-toggle-label {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  margin-left: auto;
}

.nav-toggle-label:hover,
.nav-toggle-label:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle-label .hamburger,
.nav-toggle-label .hamburger::before,
.nav-toggle-label .hamburger::after {
  display: block;
  width: 1.3rem;
  height: 2px;
  background: var(--fg);
  border-radius: 999px;
  transition: transform var(--transition), opacity var(--transition);
  content: '';
}

.nav-toggle-label .hamburger::before {
  transform: translateY(-6px);
}

.nav-toggle-label .hamburger::after {
  transform: translateY(6px);
}

.nav-toggle:checked + .nav-toggle-label .hamburger {
  opacity: 0;
}

.nav-toggle:checked + .nav-toggle-label .hamburger::before {
  transform: translateY(0) rotate(45deg);
}

.nav-toggle:checked + .nav-toggle-label .hamburger::after {
  transform: translateY(0) rotate(-45deg);
}

.site-nav {
  margin-left: auto;
}

.nav-groups {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-group {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(245, 247, 255, 0.78);
  transition: color var(--transition);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--fg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.08);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
  box-shadow: 0 18px 35px rgba(124, 92, 255, 0.16);
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), #5e3de1);
  border-color: rgba(255, 255, 255, 0.18);
}

.btn.ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.btn:hover,
.btn:focus {
  transform: translateY(-3px);
  box-shadow: 0 24px 45px rgba(124, 92, 255, 0.26);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn:disabled:hover {
  transform: none;
  box-shadow: 0 18px 35px rgba(124, 92, 255, 0.16);
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.9rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(124,92,255,0.12), transparent 45%);
  opacity: 0.9;
  pointer-events: none;
}

.card > * {
  position: relative;
  z-index: 1;
}

.card h2 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

footer {
  background: transparent;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 4rem;
  padding: 2.5rem 1.75rem 3rem;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-footer-owner {
  color: rgba(245, 247, 255, 0.55);
  text-align: center;
  margin: 0;
}

@media (max-width: 900px) {
  main, .page-content {
    padding: 2.5rem 1.15rem 0;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem 1.4rem;
  }

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

  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    display: none;
    background: rgba(6, 6, 6, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.1rem 1.3rem;
  }

  .nav-groups {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .nav-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .nav-link {
    font-size: 1.02rem;
  }

  .nav-toggle:checked ~ .site-nav {
    display: block;
  }
}

@media (max-width: 600px) {
  .site-nav {
    padding: 0.9rem 1.1rem;
  }

  .btn {
    width: 100%;
    justify-content: center;
    font-size: 0.98rem;
    padding: 0.68rem 1.1rem;
  }
}