.install-page{min-height:100vh;background:linear-gradient(180deg,#f7fafc,#eef4f8);color:#102438}.install-wrap{width:min(560px,calc(100% - 28px));margin:auto;padding:6vh 0 7vh}.install-brand{display:flex;align-items:center;gap:10px;margin-bottom:24px;color:#102a43}.install-brand span{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:#102a43;color:#fff;font-weight:900;font-size:.76rem}.install-card{background:#fff;border:1px solid #dfe7ee;border-radius:26px;padding:34px;box-shadow:0 24px 70px rgba(16,42,67,.10)}.install-icon img{width:72px;height:72px;border-radius:20px;box-shadow:0 12px 26px rgba(16,42,67,.16);margin-bottom:18px}.install-card h1{font-size:clamp(2rem,7vw,3rem);line-height:1.04;letter-spacing:-.045em;margin:16px 0 14px;color:#102a43}.install-card>p{color:#667789;line-height:1.65;margin:0 0 22px}.install-benefits{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0 0 24px}.install-benefits span{padding:11px 12px;border-radius:12px;background:#f3f7fa;color:#31506a;font-size:.78rem}.install-main,.install-secondary{width:100%;margin-top:9px}.install-tip{margin-top:14px;padding:13px;border-radius:12px;background:#edf6ff;color:#315a78;font-size:.8rem;line-height:1.55}.install-note{display:block;margin-top:18px;color:#7b8a98;line-height:1.5}.pwa-standalone body{overscroll-behavior:none}@media(max-width:560px){.install-wrap{padding-top:24px}.install-card{padding:24px 20px;border-radius:22px}.install-benefits{grid-template-columns:1fr}.install-brand{margin-left:2px}}

.pwa-diagnostics{display:grid;gap:7px;margin:14px 0 4px;text-align:left}.pwa-diagnostics>div{display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:10px;background:#f5f8fa;color:#617386;font-size:.75rem}.pwa-diagnostics span{width:9px;height:9px;border-radius:50%;background:#aab6c0}.pwa-diagnostics [data-state="ok"] span{background:#16a174;box-shadow:0 0 0 4px rgba(22,161,116,.1)}.pwa-diagnostics [data-state="bad"] span{background:#c85757}.pwa-diagnostics [data-state="wait"] span{background:#d39a28}.pwa-diagnostics b{font-weight:700}.install-secondary+ .pwa-diagnostics{margin-top:8px}


/* V2.0 engagement-aware install */
.engagement-box{margin:12px 0 8px;padding:14px;border-radius:14px;background:#f4f8fb;border:1px solid #dce7ef;color:#456077}
.engagement-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:9px}.engagement-head b{font-size:.83rem;color:#16344d}.engagement-head span{font-size:.76rem;font-weight:850;color:#1768ae}
.engagement-bar{height:7px;border-radius:999px;background:#dfe8ef;overflow:hidden;margin-bottom:9px}.engagement-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,#1768ae,#0b9a83);border-radius:999px;transition:width .4s ease}
.engagement-box small{display:block;font-size:.7rem;line-height:1.5;color:#607589}
.install-main[data-ready="1"]{background:#0c755f;box-shadow:0 8px 22px rgba(12,117,95,.2)}


/* PWA V2.1 — platform-specific install */
.platform-guide{display:grid;gap:10px;margin:18px 0;padding:16px;border:1px solid #dce7ef;border-radius:16px;background:#f8fbfd}
.guide-step{display:flex;align-items:flex-start;gap:11px;color:#38566f;font-size:.84rem;line-height:1.5}.guide-step>b{display:grid;place-items:center;width:28px;height:28px;min-width:28px;border-radius:9px;background:#102a43;color:#fff;font-size:.72rem}.guide-step strong{color:#102a43}
.shortcut-box{margin:16px 0;padding:16px;border:1px solid #d8e5ed;border-radius:16px;background:#f7fbff}.shortcut-box>b{display:block;color:#102a43;margin-bottom:6px}.shortcut-box p{font-size:.78rem;line-height:1.55;color:#607589;margin:0 0 12px}.shortcut-box .btn{width:100%}


/* PWA V2.2 — robust platform visibility and Windows fallback */
[hidden]{display:none!important}
.windows-fallback{border-color:#cfe3f2;background:linear-gradient(180deg,#f6fbff,#eef7fd)}
.windows-fallback small{display:block;margin-top:9px;color:#718596;font-size:.7rem;line-height:1.45}
.install-main.is-probing{background:#1768ae}
.install-main.is-fallback{background:#102a43}

.brand-install-new{display:flex!important;align-items:center;gap:10px}
.brand-install-new img{width:42px;height:42px;border-radius:12px;object-fit:cover;box-shadow:0 5px 14px rgba(16,42,67,.15)}