.app-nav-link { color: #314f6d; text-decoration: none; font-size: .9rem; font-weight: 650; padding: .35rem .8rem; border-radius: 2rem; background: #f1f4f7; }
.app-nav-link:hover, .app-nav-link[aria-current="page"] { color: #314f6d; background: #e4eaf0; }
.app-guide { max-width: 1060px; margin: 0 auto; }
.app-hero { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: center; padding: clamp(1.5rem, 4vw, 3rem); border-radius: 1.5rem; background: #314f6d; color: #fff; }
.app-eyebrow { margin-bottom: .8rem; color: #ffd4b6; font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.app-hero h1 { max-width: 650px; font-size: clamp(2rem, 4.5vw, 3.25rem); font-weight: 750; line-height: 1.12; letter-spacing: -.035em; }
.app-hero .app-intro { max-width: 38rem; font-size: 1.1rem; line-height: 1.7; color: #e3eaf0; }
.app-hero-icon { width: 144px; height: 144px; border-radius: 1.6rem; box-shadow: 0 14px 30px #162b414d; background: #fff; }
.app-benefits { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; list-style: none; padding: 0; margin: 1.5rem 0 0; font-size: .9rem; }
.app-benefits i { color: #ffc89f; margin-right: .3rem; }
.app-install-action { padding: 1.5rem 0; }
.app-install-action [hidden] { display: none !important; }
.app-install-action .btn { background: #314f6d; border-color: #314f6d; color: #fff; padding: .75rem 1.25rem; }
.app-install-action .btn:hover { background: #243e57; }
.app-status { padding: 1rem 1.25rem; margin-bottom: 1rem; background: #edf4ef; color: #214d32; border-radius: .75rem; }
.app-platform-nav { display: flex; flex-wrap: wrap; gap: .65rem; margin: 1rem 0 1.75rem; }
.app-platform-nav a { color: #314f6d; background: #fff; border: 1px solid #d5dde5; padding: .6rem 1rem; text-decoration: none; border-radius: 2rem; font-weight: 600; }
.app-platform-nav a:hover { background: #eaf0f5; border-color: #314f6d; }
.app-platforms { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.app-platform { background: #fff; border: 1px solid #e0e5ea; border-radius: 1.25rem; padding: clamp(1.25rem, 3vw, 2rem); scroll-margin-top: 1rem; }
.app-platform:target { border-color: #e77224; box-shadow: 0 0 0 3px #e7722426; }
.app-platform-title { display: flex; gap: 1rem; align-items: center; margin-bottom: 1.5rem; }
.app-platform-icon { display: grid; place-items: center; width: 48px; height: 48px; flex-shrink: 0; background: #fef1e7; color: #9c410d; border-radius: .9rem; font-size: 1.4rem; }
.app-platform h3 { margin: 0 0 .2rem; font-size: 1.3rem; color: #314f6d; font-weight: 700; }
.app-platform-subtitle { font-size: .9rem; color: #626e78; margin: 0; }
.app-steps { padding-left: 1.4rem; margin-bottom: 1.25rem; }
.app-steps li { padding-left: .35rem; margin-bottom: .9rem; line-height: 1.65; }
.app-steps li::marker { color: #314f6d; font-weight: 750; }
.app-note { font-size: .9rem; line-height: 1.6; color: #566371; }
.app-guide a:not(.btn):not(.app-nav-link) { text-underline-offset: .2em; }
.app-platform > a, .app-faq a { color: #314f6d; }
.app-other { padding: 1.5rem; margin-top: 1.25rem; border-radius: 1rem; background: #edf1f5; }
.app-other h3 { font-size: 1.1rem; color: #314f6d; }
.app-other p { margin: 0; line-height: 1.7; }
.app-faq { margin-top: 2.75rem; }
.app-faq h2, .app-guide h2 { color: #314f6d; font-weight: 700; }
.app-faq details { border-bottom: 1px solid #dce2e8; padding: 1.15rem 0; }
.app-faq summary { cursor: pointer; font-weight: 650; color: #314f6d; }
.app-faq details p { max-width: 52rem; margin: .8rem 0 0; line-height: 1.75; }
.app-guide :focus-visible, .app-nav-link:focus-visible { outline: 3px solid #b64e0e; outline-offset: 4px; }
@media (max-width: 767px) {
    .app-hero { grid-template-columns: 1fr; gap: 1rem; }
    .app-hero-icon { width: 72px; height: 72px; border-radius: 1rem; grid-row: 1; }
    .app-platforms { grid-template-columns: 1fr; }
    .app-platform-nav { gap: .5rem; }
    .app-platform-nav a { font-size: .9rem; padding: .55rem .8rem; }
}