:root { --bg: #f6f7fb; --card: #fff; --ink: #14141f; --muted: #5b5b70; --line: #e4e5ee; --accent: #6a28b8; color-scheme: light dark; font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif; }
@media (prefers-color-scheme: dark) { :root { --bg: #0b0b14; --card: #14141f; --ink: #f1f1f8; --muted: #a4a4b8; --line: #26263a; --accent: #bb66ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.6; }
.top, main, footer { max-width: 720px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
.top { padding-top: 16px; padding-bottom: 8px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); letter-spacing: .04em; }
.brand img { border-radius: 8px; }
main { padding-bottom: 24px; }
h1 { font-size: 1.7rem; margin: 20px 0 4px; }
h2 { font-size: 1.1rem; margin: 28px 0 6px; }
.lead { font-size: 1.05rem; color: var(--muted); margin: 0 0 4px; }
.updated { color: var(--muted); font-size: .85rem; margin: 0 0 8px; }
p, li { margin: 8px 0; }
ul { padding-left: 20px; }
a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
footer { border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 32px; color: var(--muted); font-size: .85rem; }
footer p { letter-spacing: .15em; font-size: .7rem; }
h3 { font-size: 1rem; margin: 20px 0 4px; }
.part { font-size: 1.35rem; margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); scroll-margin-top: 12px; }
section[id] { scroll-margin-top: 12px; }
.jump { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.jump a { padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); text-decoration: none; font-size: .9rem; }
.jump.small a { font-size: .8rem; padding: 4px 10px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; margin: 8px 0 16px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }
@media (max-width: 560px) { table { font-size: .82rem; } th, td { padding: 6px 6px; } }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.msrx-home { font-size: .85rem; font-weight: 600; color: var(--muted); text-decoration: none; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); }
.msrx-home:hover { color: var(--accent); }

/* How-to-use guide */
.guide main { max-width: 920px; }
.gpart { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); scroll-margin-top: 12px; }
.gpart h2 { font-size: 1.35rem; margin: 0 0 6px; }
.steps { list-style: none; margin: 0; padding: 0; }
.step { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; padding: 22px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 12px; }
.step:last-child { border-bottom: 0; }
.step h3 { display: flex; align-items: center; gap: 10px; font-size: 1.08rem; margin: 0 0 6px; }
.step-n { flex: none; display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg, #00d5e6, #a35cf0); color: #fff; font-size: .85rem; font-weight: 700; }
.phone { margin: 0; justify-self: center; width: min(300px, 100%); }
.phone img { display: block; width: 100%; height: auto; border-radius: 26px; border: 1px solid var(--line); box-shadow: 0 12px 34px rgba(40, 30, 90, .14); background: var(--card); }
.phone.tall { max-height: 640px; overflow: auto; border-radius: 26px; }
details { border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; margin: 10px 0; background: var(--card); }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 2px; }
.cta { text-align: center; margin: 32px 0 8px; }
.cta-btn { display: inline-block; padding: 12px 22px; border-radius: 12px; background: var(--ink); color: var(--bg); text-decoration: none; font-weight: 700; }
@media (min-width: 760px) {
  .step { grid-template-columns: minmax(0, 1fr) 280px; gap: 32px; align-items: start; }
  .phone { width: 280px; position: sticky; top: 16px; }
}
.guide .top, .guide footer { max-width: 920px; }
.step h3 { font-size: 1.15rem; line-height: 1.35; }
.step p { font-size: 1rem; line-height: 1.65; color: var(--ink); }
@media (max-width: 560px) { .guide .jump a { font-size: .82rem; padding: 5px 10px; } .step h3 { font-size: 1.05rem; } }