:root {
  color-scheme: dark;
  --bg: #020814;
  --panel: rgba(10, 24, 42, 0.82);
  --panel-strong: rgba(14, 35, 58, 0.96);
  --line: rgba(105, 192, 255, 0.22);
  --text: #eef6ff;
  --muted: #a7bad0;
  --soft: #6f88a3;
  --accent: #69c0ff;
  --accent-2: #6df2b0;
  --danger: #ff7b8a;
  --shadow: rgba(0, 0, 0, 0.35);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html[data-lang="en"] [data-lang-content="pl"],
html[data-lang="pl"] [data-lang-content="en"] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 0%, rgba(36, 93, 153, 0.48), transparent 38rem),
    radial-gradient(circle at 88% 18%, rgba(24, 104, 74, 0.26), transparent 32rem),
    linear-gradient(140deg, #020814 0%, #06111f 52%, #020711 100%);
  color: var(--text);
  line-height: 1.65;
}

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

a:hover,
a:focus {
  color: #9ed8ff;
  text-decoration: underline;
}

.site-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid rgba(105, 192, 255, 0.16);
  background: rgba(2, 8, 20, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 13px;
  background: linear-gradient(135deg, #69c0ff, #2b7fff 48%, #6df2b0);
  box-shadow: 0 10px 28px rgba(43, 127, 255, 0.3);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.nav-main {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-links a {
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a[aria-current="page"],
.nav-links a:hover,
.nav-links a:focus {
  border-color: var(--line);
  background: rgba(105, 192, 255, 0.09);
  color: var(--text);
  text-decoration: none;
}

.hero {
  padding: 76px 0 34px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 28px;
  align-items: stretch;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: #f7fbff;
  line-height: 1.12;
}

h1 {
  margin: 0;
  font-size: clamp(2.45rem, 7vw, 5.2rem);
  letter-spacing: -0.07em;
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  letter-spacing: -0.04em;
}

h3 {
  margin: 28px 0 8px;
  font-size: 1.18rem;
}

.lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1.04rem, 2vw, 1.24rem);
}

.card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(14, 35, 58, 0.92), rgba(5, 17, 31, 0.76));
  box-shadow: 0 22px 60px var(--shadow);
}

.hero-card {
  padding: 26px;
}

.metric-list,
.link-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.metric-list li,
.link-list a {
  display: block;
  border: 1px solid rgba(105, 192, 255, 0.16);
  border-radius: 18px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.035);
}

.metric-list strong,
.link-list strong {
  display: block;
  color: var(--text);
}

.metric-list span,
.link-list span {
  color: var(--muted);
  font-size: 0.94rem;
}

.section {
  padding: 34px 0;
}

.content-card {
  padding: clamp(22px, 4vw, 42px);
}

.page-intro {
  max-width: 920px;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  color: var(--soft);
  font-size: 0.94rem;
}

.pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(105, 192, 255, 0.08);
}

.notice {
  border-left: 3px solid var(--accent-2);
  margin: 24px 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(109, 242, 176, 0.08);
  color: #d8ffe9;
}

.language-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.language-switch button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 14px;
  background: rgba(105, 192, 255, 0.08);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 0.94rem;
  font-weight: 700;
}

.language-switch button:hover,
.language-switch button:focus,
.language-switch button[aria-pressed="true"] {
  border-color: rgba(109, 242, 176, 0.46);
  background: rgba(105, 192, 255, 0.16);
  color: #f7fbff;
}

.language-switch button[aria-pressed="true"] {
  box-shadow: 0 0 0 1px rgba(109, 242, 176, 0.16), 0 10px 28px rgba(43, 127, 255, 0.16);
}

.doc {
  max-width: 860px;
}

.doc-card {
  margin-top: 28px;
}

.language-section {
  scroll-margin-top: 110px;
}

.doc .language-section + .language-section {
  margin-top: 42px;
}

.doc .language-section > h2:first-child {
  margin-top: 28px;
}

.doc p,
.doc li {
  color: var(--muted);
}

.doc ul,
.doc ol {
  padding-left: 1.35rem;
}

.doc code {
  border: 1px solid rgba(105, 192, 255, 0.18);
  border-radius: 8px;
  padding: 0.12rem 0.32rem;
  background: rgba(105, 192, 255, 0.08);
  color: #dff2ff;
}

.divider {
  height: 1px;
  margin: 42px 0;
  background: linear-gradient(90deg, transparent, rgba(105, 192, 255, 0.35), transparent);
}

.cta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.site-footer {
  padding: 42px 0 54px;
  color: var(--soft);
  font-size: 0.92rem;
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 24px, 1120px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .nav-main {
    justify-content: flex-start;
  }

  .language-switch button {
    flex: 1 1 130px;
    text-align: center;
  }

  .hero {
    padding-top: 46px;
  }

  .hero-grid,
  .cta-grid {
    grid-template-columns: 1fr;
  }

  .content-card,
  .hero-card {
    border-radius: 22px;
  }
}