:root {
  --brand: #0a8cff;
  --brand-ink: #1e2840;
  --accent: #1f6fd1;
  --ink: #1b2333;
  --muted: #5b6577;
  --bg: #ffffff;
  --band: #f5f8fc;
  --line: #dde4ee;
  --card: #ffffff;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif; }
img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
h1, h2, h3 { color: var(--brand-ink); line-height: 1.25; }
h1 { font-size: clamp(28px, 4.5vw, 42px); margin: 0 0 16px; }
h2 { font-size: clamp(22px, 3vw, 28px); margin: 40px 0 12px; }
h3 { font-size: 18px; margin: 0 0 8px; }
code { background: var(--band); padding: 1px 5px; border-radius: 4px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.small { font-size: 14px; }
.muted { color: var(--muted); }
.lead { font-size: 18px; color: var(--muted); max-width: 760px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 6px 10px; z-index: 10; }

.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; gap: 20px; min-height: 60px; flex-wrap: wrap; }
.logo img { height: 36px; width: auto; }
.top nav { display: flex; gap: 4px 16px; flex-wrap: wrap; flex: 1; }
.top nav a { color: var(--ink); text-decoration: none; font-weight: 500; font-size: 15px; }
.top nav a[aria-current="page"], .top nav a:hover { color: var(--brand); }

.btn { display: inline-block; background: var(--brand); color: #fff; text-decoration: none; font-weight: 600; padding: 11px 20px; border-radius: 8px; border: 1px solid var(--brand); }
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--brand); }
.btn.small { padding: 6px 14px; font-size: 14px; }
.btn.disabled { background: var(--band); color: var(--muted); border-color: var(--line); cursor: default; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 12px; }

.hero { background: #fff; padding: 56px 0 40px; }
.hero-in { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.hero-img { border-radius: 12px; box-shadow: 0 12px 40px rgba(10, 40, 90, 0.18); }

.band { background: var(--band); padding: 8px 0 40px; margin-top: 48px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.prices { grid-template-columns: repeat(4, 1fr); margin-top: 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; position: relative; }
.card p { margin: 0 0 12px; }
.card h2 { margin-top: 0; font-size: 20px; }
.price { display: flex; flex-direction: column; }
.price ul { padding-left: 18px; flex: 1; }
.price .amt { font-size: 26px; font-weight: 700; color: var(--brand-ink); margin: 0; }
.price .amt small { font-size: 14px; font-weight: 400; color: var(--muted); }
.price.best { border: 2px solid var(--brand); }
.ribbon { position: absolute; top: -12px; right: 12px; background: var(--brand); color: #fff; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 10px; }
.price-teaser { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.ticks { padding-left: 20px; }
.ticks li { margin: 8px 0; }

figure { margin: 0; }
figure img, figure video { border-radius: 10px; border: 1px solid var(--line); width: 100%; }
figcaption { font-size: 14px; color: var(--muted); margin-top: 6px; }

.demo { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; align-items: start; margin: 32px 0 48px; }
.demo:nth-of-type(even) { grid-template-columns: 1fr 1.4fr; }
.demo:nth-of-type(even) figure { order: 2; }
.demo h2 { margin-top: 0; }
.demo ol, .demo ul { padding-left: 20px; }

.prose { max-width: 860px; }
.prose li { margin: 6px 0; }
.toc { display: flex; flex-wrap: wrap; gap: 6px 14px; padding: 12px 16px; background: var(--band); border-radius: 8px; font-size: 15px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--band); }
details { border-bottom: 1px solid var(--line); padding: 4px 0; }
summary { cursor: pointer; list-style: none; }
summary h2 { display: inline; font-size: 19px; margin: 0; }
summary::-webkit-details-marker { display: none; }
details > p { margin: 6px 0 14px; }

.foot { border-top: 1px solid var(--line); margin-top: 64px; padding: 28px 0; background: var(--band); }
.foot-in { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: 12px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 14px; }

@media (max-width: 900px) {
  .hero-in, .demo, .demo:nth-of-type(even) { grid-template-columns: 1fr; }
  .demo:nth-of-type(even) figure { order: 0; }
  .grid, .grid.three, .grid.prices { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid, .grid.two, .grid.three, .grid.prices { grid-template-columns: 1fr; }

}

.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 8px; }
.badges span { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 4px 12px; font-size: 14px; font-weight: 600; }
.platforms { margin-top: 48px; }
.plat-ico { font-size: 34px; line-height: 1; margin-bottom: 8px; }

/* Mobile: hamburger menu (pure CSS – the links stay in the HTML for crawlers). */
.menu-tg { position: absolute; opacity: 0; pointer-events: none; }
.burger { display: none; cursor: pointer; width: 40px; height: 40px; border-radius: 8px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; margin-left: auto; }
.burger span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav-login { display: none; }
@media (max-width: 760px) {
  .burger { display: flex; }
  .top-login { display: none; }
  .top nav.main-nav { display: none; flex-basis: 100%; flex-direction: column; gap: 0; padding: 4px 0 12px; }
  .top nav.main-nav a { padding: 12px 4px; border-top: 1px solid var(--line); font-size: 17px; }
  .top nav.main-nav a.nav-login { display: block; text-align: center; margin-top: 10px; border: 1px solid var(--brand); color: #fff; }
  .menu-tg:checked ~ nav.main-nav { display: flex; }
  .menu-tg:checked + .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-tg:checked + .burger span:nth-child(2) { opacity: 0; }
  .menu-tg:checked + .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}