:root {
  --color-bg: #0f172a;
  --color-bg-soft: #1e293b;

  --color-surface: rgba(255, 255, 255, 0.05);
  --color-border: rgba(255, 255, 255, 0.12);

  --color-text: #f1f5f9;
  --color-text-muted: #a8b3c7;

  --color-accent: #60a5fa;
  --color-accent-strong: #2563eb;

  --page-width: 1120px;

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  min-height: 100vh;

  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;

  color: var(--color-text);

  background: radial-gradient(
      circle at top right,
      rgba(37, 99, 235, 0.16),
      transparent 28rem
    ),
    linear-gradient(135deg, var(--color-bg), var(--color-bg-soft));
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.page-container {
  width: min(var(--page-width), calc(100% - 3rem));
  margin-inline: auto;
}

.page-section {
  padding: 4.5rem 0;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;

  min-height: 72px;

  display: flex;
  align-items: center;

  border-bottom: 1px solid var(--color-border);

  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(14px);
}

.site-nav__container {
  width: min(var(--page-width), calc(100% - 3rem));

  margin-inline: auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav__brand {
  font-size: 1rem;
  font-weight: 700;

  text-decoration: none;
}

.site-nav__links {
  display: flex;
  align-items: center;

  gap: 1.5rem;

  margin: 0;
  padding: 0;

  list-style: none;
}

.site-nav__link {
  position: relative;

  padding: 0.5rem 0;

  color: var(--color-text-muted);

  font-size: 0.95rem;
  text-decoration: none;

  transition: color 0.2s ease, opacity 0.2s ease;
}
.site-nav__link:hover,
.site-nav__link--active {
  color: var(--color-text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-height: 46px;
  padding: 0.7rem 1.2rem;

  border: 1px solid var(--color-border);
  border-radius: 999px;

  font-weight: 600;
  text-decoration: none;

  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  border-color: var(--color-accent-strong);

  color: #ffffff;
  background: var(--color-accent-strong);
}
.button--secondary {
  background: var(--color-surface);
}
.button--secondary:hover {
  border-color: var(--color-accent);
}

.section-kicker {
  display: inline-block;
  margin-bottom: 0.8rem;
  color: var(--color-accent);

  font-size: 0.8rem;
  font-weight: 700;

  letter-spacing: 0.13rem;
  text-transform: uppercase;
}
.section-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
}
.section-description {
  max-width: 680px;
  margin: 1rem 0 0;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
}
.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.8rem;
  border: 1px solid rgba(96, 165, 250, 0.15);
  border-radius: 999px;
  color: #bfdbfe;
  background: rgba(96, 165, 250, 0.1);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .page-container,
  .site-nav__container {
    width: calc(100% - 2rem);
  }
  .page-section {
    padding: 3.5rem 0;
  }
  .site-nav {
    min-height: 64px;
  }
  .site-nav__links {
    font-size: 0.88rem;
  }
}

@media (max-width: 520px) {
  .site-nav__links {
    gap: 0.55rem;
  }
  .site-nav__brand {
    font-size: 0.85rem;
  }
  .site-nav__link {
    font-size: 0.8rem;
  }
}
.site-footer__content {
  display: flex;

  align-items: center;
  justify-content: space-between;

  gap: 2rem;
}

.site-footer__copyright {
  margin: 0;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;

  gap: 1.25rem;
}

.site-footer__links a {
  color: var(--color-text-muted);

  text-decoration: none;

  transition: color 0.2s ease;
}

.site-footer__links a:hover {
  color: var(--color-text);
}

@media (max-width: 600px) {
  .site-footer__content {
    align-items: flex-start;
    flex-direction: column;

    gap: 1rem;
  }
}