:root {
  --blue: #0b5ed7;
  --blue-dark: #084298;
  --blue-light: #e8f0fd;
  --text: #1b2433;
  --muted: #5a667a;
  --line: #d9e1ef;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.6;
  font-size: 1.05rem;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
a { color: var(--blue); }
h1 { font-size: 1.8rem; line-height: 1.2; margin: 1.2rem 0 .6rem; }
h2 { font-size: 1.35rem; margin: 2rem 0 .6rem; }
h3 { font-size: 1.1rem; margin: .4rem 0; }
.lead { font-size: 1.15rem; color: var(--muted); }

/* Header */
.site-header { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.header-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 16px; padding-top: 8px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--blue-dark); text-decoration: none; }
.brand img { border-radius: 8px; object-fit: contain; }
.nav { display: flex; flex-wrap: wrap; gap: 4px; }
.nav a { padding: 8px 12px; border-radius: 999px; text-decoration: none; color: var(--text); font-weight: 600; font-size: .95rem; }
.nav a:hover { background: var(--blue-light); }
.nav a[aria-current="page"] { background: var(--blue); color: #fff; }

/* Hero */
.hero { background: var(--blue-light); border-radius: var(--radius); padding: 24px 18px; margin-top: 18px; text-align: center; }
.hero h1 { font-size: 1.75rem; }
.eyebrow { margin: 0; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: .06em; font-size: .85rem; }

/* Download button */
.download-box { margin-top: 22px; }
.btn { display: inline-block; background: var(--blue); color: #fff; text-decoration: none; font-weight: 700; border-radius: var(--radius); }
.btn:hover { background: var(--blue-dark); }
.btn-big { width: 100%; max-width: 420px; padding: 18px 20px; font-size: 1.4rem; line-height: 1.2; box-shadow: 0 4px 14px rgba(11,94,215,.3); }
.btn-big small { display: block; font-weight: 500; font-size: .9rem; opacity: .9; margin-top: 4px; }
.version-line { margin: 12px 0 2px; color: var(--text); }
.safe-line { margin: 2px 0 0; font-size: .95rem; }

/* Cards */
.cards { list-style: none; padding: 0; display: grid; gap: 12px; }
.cards li { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; position: relative; padding-left: 64px; }
.cards .num { position: absolute; left: 16px; top: 16px; width: 36px; height: 36px; border-radius: 50%; background: var(--blue); color: #fff; font-weight: 700; display: grid; place-items: center; }
.cards p { margin: 0; color: var(--muted); }
.callout { background: var(--blue-light); border-radius: var(--radius); padding: 4px 18px 16px; margin: 28px 0; }

/* Guides */
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.toc a { background: var(--blue-light); padding: 8px 14px; border-radius: 999px; text-decoration: none; font-weight: 600; font-size: .95rem; }
.guide { border-top: 1px solid var(--line); padding-top: 4px; }
.steps { padding-left: 1.3rem; }
.steps li { margin-bottom: 20px; padding-left: 4px; }
.steps li::marker { font-weight: 700; color: var(--blue); }
.shot { display: block; max-width: 100%; width: 260px; height: auto; border: 1px solid var(--line); border-radius: 12px; margin-top: 8px; }
.shot-placeholder { width: 260px; max-width: 100%; aspect-ratio: 9 / 16; max-height: 240px; border: 2px dashed var(--line); border-radius: 12px; display: grid; place-items: center; color: var(--muted); font-size: .9rem; margin-top: 8px; background: #f7f9fd; }
.back { font-size: .9rem; }

/* Video */
.video-frame { position: relative; aspect-ratio: 16 / 9; width: 100%; border-radius: var(--radius); overflow: hidden; background: #0e1726; margin: 16px 0; }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-placeholder { display: grid; place-items: center; color: #fff; font-weight: 600; }

/* What's new */
.version { border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 18px 10px; margin: 16px 0; }
.version h2 { margin-top: 12px; }
.date { margin: -4px 0 8px; color: var(--muted); font-size: .95rem; }
.badge { background: var(--blue); color: #fff; font-size: .75rem; padding: 3px 10px; border-radius: 999px; vertical-align: middle; }

/* FAQ */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); margin: 10px 0; }
.faq-item summary { cursor: pointer; padding: 14px 16px; font-weight: 700; list-style-position: inside; }
.faq-item[open] summary { background: var(--blue-light); border-radius: var(--radius) var(--radius) 0 0; }
.faq-item .answer { padding: 4px 16px 12px; }
.faq-item:target { outline: 2px solid var(--blue); }

/* Footer */
.site-footer { background: var(--blue-dark); color: #fff; margin-top: 48px; padding: 24px 0; font-size: .95rem; }
.site-footer a { color: #fff; }
.site-footer p { margin: 6px 0; }
.small { opacity: .75; font-size: .85rem; }

@media (min-width: 700px) {
  h1 { font-size: 2.3rem; }
  .hero { padding: 40px 32px; }
  .hero h1 { font-size: 2.3rem; }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .cards li { padding: 64px 16px 16px; }
  .cards .num { top: 16px; }
}