:root {
  --bg: #fff;
  --fg: #1d2433;
  --mut: #51596b;
  --pri: #1f5fbf;
  --pri2: #e8f0fc;
  --acc: #f2a900;
  --card: #f6f8fb;
  --bd: #d5dbe6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161f;
    --fg: #eef1f7;
    --mut: #b3bccd;
    --pri: #7fb0ff;
    --pri2: #1c2740;
    --card: #1a2030;
    --bd: #2d3650;
  }
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 19px;
}
body {
  margin: 0;
  font-family: Verdana, Arial, sans-serif;
  line-height: 1.7;
  background: var(--bg);
  color: var(--fg);
}
.w {
  max-width: 1000px;
  margin: auto;
  padding: 0 20px;
}
a {
  color: var(--pri);
}
h1,
h2,
h3 {
  line-height: 1.25;
}
h2 {
  font-size: 1.7rem;
  margin-top: 0;
}
header {
  background: var(--bg);
  border-bottom: 2px solid var(--bd);
  position: sticky;
  top: 0;
  z-index: 5;
}
header .w {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 20px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.logo {
  font-weight: 700;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--fg);
}
.logo span {
  color: var(--pri);
}
nav {
  grid-column: 2;
  display: grid;
  grid-auto-flow: column;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, auto);
  align-items: center;
  gap: 6px 16px;
}
nav a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 700;
  padding: 4px 2px;
}
nav a:hover {
  color: var(--pri);
  text-decoration: underline;
}
.lang {
  grid-column: 3;
  justify-self: end;
  border: 2px solid var(--pri);
  border-radius: 6px;
  padding: 0 5px;
  font-size: 0.7rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
@media (max-width: 760px) {
  header .w {
    grid-template-columns: minmax(0, 1fr) auto;
  }
  nav {
    grid-column: 1 / -1;
    grid-row: 2;
  }
  .lang {
    grid-column: 2;
    grid-row: 1;
  }
}
.btn {
  display: inline-block;
  background: var(--pri);
  color: #fff;
  padding: 14px 26px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
}
[data-theme] .btn,
.btn:hover {
  filter: brightness(1.1);
}
.btn.alt {
  background: transparent;
  color: var(--pri);
  border: 2px solid var(--pri);
}
.hero {
  background: var(--pri2);
  padding: 60px 0;
}
.hero h1 {
  font-size: 2.3rem;
  margin: 0 0 12px;
}
.hero p {
  max-width: 640px;
  font-size: 1.15rem;
}
section {
  padding: 48px 0;
}
section.alt {
  background: var(--card);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: var(--bg);
  border: 2px solid var(--bd);
  border-radius: 14px;
  padding: 22px;
}
.card h3 {
  margin-top: 0;
}
.tag {
  display: inline-block;
  background: var(--acc);
  color: #222;
  font-weight: 700;
  border-radius: 20px;
  padding: 2px 12px;
  font-size: 0.85rem;
}
ol.steps {
  counter-reset: s;
  list-style: none;
  padding: 0;
}
ol.steps li {
  counter-increment: s;
  position: relative;
  padding: 8px 0 8px 56px;
  margin-bottom: 10px;
}
ol.steps li:before {
  content: counter(s);
  position: absolute;
  left: 0;
  top: 6px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--pri);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
}
details {
  border: 2px solid var(--bd);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 10px;
  background: var(--bg);
}
summary {
  cursor: pointer;
  font-weight: 700;
}
footer {
  background: #1d2433;
  color: #eef1f7;
  padding: 18px 0;
  font-size: 0.8rem;
  text-align: center;
}
footer a {
  color: #cfe0ff;
  margin-right: 14px;
}
.doc {
  padding: 40px 0;
}
.doc h2 {
  margin-top: 2rem;
  font-size: 1.3rem;
}
.note {
  background: var(--pri2);
  border-left: 6px solid var(--acc);
  padding: 12px 16px;
  border-radius: 6px;
}
a:focus,
button:focus,
summary:focus {
  outline: 3px solid var(--acc);
  outline-offset: 2px;
}
.lang:focus:not(:focus-visible) {
  outline: none;
}
@media (max-width: 600px) {
  html {
    font-size: 17px;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
}
.hero .w {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
  align-items: center;
}
.hero svg {
  width: 100%;
  height: auto;
}
@media (max-width: 760px) {
  .hero .w {
    grid-template-columns: 1fr;
  }
}
.ico {
  font-size: 3rem;
  line-height: 1;
  display: block;
  margin-bottom: 6px;
}
.card {
  transition: transform 0.2s;
}
.card:hover {
  transform: translateY(-4px);
}
.big {
  font-size: 1.2rem;
}
.small-asterisk {
  font-size: 0.8em;
}
.center {
  text-align: center;
}
.pill {
  display: inline-block;
  background: var(--pri2);
  border-radius: 30px;
  padding: 6px 16px;
  margin: 4px 4px 4px 0;
  font-weight: 700;
}
.bubble {
  background: var(--pri2);
  border-radius: 20px 20px 20px 4px;
  padding: 14px 18px;
  display: inline-block;
  margin: 6px 0;
}
.bubble .center {
  display: block;
}