/* Ý 11 – Lời mời cài app, thông báo nhỏ, nút quay lại khi mở như app, và trang "Cài app lên điện thoại".
   Hiệu ứng chỉ đổi transform và opacity. */

/* ---------- Lời mời cài app (hiện ở dưới màn hình) ---------- */
.fa-pwa-banner { position: fixed; z-index: 1040; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom)); width: min(560px, calc(100vw - 24px));
  display: grid; grid-template-columns: auto 1fr; gap: .25rem .85rem; align-items: center; padding: .9rem 1rem;
  background: var(--fa-surface, #FFFDF8); border: 1px solid var(--fa-line, #F3E1C7); border-radius: 20px; box-shadow: var(--fa-shadow-lg);
  opacity: 0; transform: translate(-50%, 24px); transition: opacity .45s var(--fa-ease), transform .45s var(--fa-ease); }
.fa-pwa-banner.is-in { opacity: 1; transform: translate(-50%, 0); }
.fa-pwa-banner-icon { width: 48px; height: 48px; border-radius: 12px; align-self: start; }
.fa-pwa-banner-text { display: flex; flex-direction: column; font-size: .9rem; color: var(--fa-muted); line-height: 1.4; min-width: 0; }
.fa-pwa-banner-text strong { color: var(--fa-ink); font-size: .98rem; }
.fa-pwa-banner-text .bi { color: #2F7DF6; }
.fa-pwa-banner-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: .1rem; margin-top: .4rem; }
.fa-pwa-banner-actions .btn { min-height: 40px; display: inline-flex; align-items: center; gap: .35rem; padding-inline: .85rem; border-radius: 999px; white-space: nowrap; }
.fa-pwa-banner-actions .fa-pwa-later { color: var(--fa-muted); text-decoration: none; padding-inline: .35rem; font-size: .88rem; }
.fa-pwa-later:hover { color: var(--fa-ink); }

/* ---------- Thông báo nhỏ "Đã cài xong" ---------- */
.fa-pwa-toast { position: fixed; z-index: 1070; left: 50%; top: calc(76px + env(safe-area-inset-top)); width: max-content; max-width: calc(100vw - 32px);
  padding: .7rem 1.1rem; border-radius: 999px; background: var(--fa-ink); color: #FFF6E4; font-size: .92rem; box-shadow: var(--fa-shadow-lg);
  opacity: 0; transform: translate(-50%, -12px); transition: opacity .4s var(--fa-ease), transform .4s var(--fa-ease); }
.fa-pwa-toast.is-in { opacity: 1; transform: translate(-50%, 0); }
.fa-pwa-toast .bi { color: var(--fa-honey); }

/* ---------- Nút quay lại khi mở bằng biểu tượng trên iPhone ---------- */
.fa-pwa-back { position: fixed; z-index: 1030; left: 14px; bottom: calc(18px + env(safe-area-inset-bottom)); width: 48px; height: 48px; border-radius: 50%;
  border: 1px solid var(--fa-line); background: rgba(255, 253, 248, .92); color: var(--fa-amber-dark); font-size: 1.3rem; box-shadow: var(--fa-shadow);
  display: grid; place-items: center; -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); animation: fa-pwa-pop .45s var(--fa-ease) both; }
.fa-pwa-back:active { transform: scale(.92); }
@keyframes fa-pwa-pop { from { opacity: 0; transform: scale(.6); } to { opacity: 1; transform: none; } }

/* ---------- Trang "Cài app lên điện thoại" ---------- */
.fa-install-hero { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.fa-install-hero img { width: 88px; height: 88px; border-radius: 22px; box-shadow: var(--fa-shadow); animation: fa-pwa-float 4s ease-in-out infinite; }
@keyframes fa-pwa-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.fa-install-list { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.fa-install-card { position: relative; background: var(--fa-surface); border: 1px solid var(--fa-line); border-radius: var(--fa-radius); padding: 1.25rem 1.25rem 1rem; box-shadow: var(--fa-shadow); }
.fa-install-card.is-mine { border-color: var(--fa-honey); box-shadow: 0 0 0 3px rgba(245, 166, 35, .22), var(--fa-shadow); }
.fa-install-card .fa-mine-tag { display: none; position: absolute; top: -12px; right: 16px; background: linear-gradient(135deg, var(--fa-honey), var(--fa-amber));
  color: #fff; font-size: .75rem; font-weight: 600; padding: .2rem .7rem; border-radius: 999px; }
.fa-install-card.is-mine .fa-mine-tag { display: inline-block; }
.fa-install-card h2 { font-size: 1.1rem; font-weight: 700; display: flex; align-items: center; gap: .5rem; margin-bottom: .9rem; }
.fa-install-card h2 .bi { font-size: 1.4rem; color: var(--fa-amber); }
.fa-install-steps { list-style: none; counter-reset: b; padding: 0; margin: 0; }
.fa-install-steps li { counter-increment: b; position: relative; padding: 0 0 .9rem 2.6rem; min-height: 2.2rem; }
.fa-install-steps li::before { content: counter(b); position: absolute; left: 0; top: -.1rem; width: 1.9rem; height: 1.9rem; border-radius: 50%;
  display: grid; place-items: center; font-weight: 600; font-size: .9rem; background: var(--fa-soft); color: var(--fa-amber-dark); }
.fa-key { display: inline-flex; align-items: center; gap: .3rem; padding: .05rem .5rem; border-radius: 8px; background: #fff; border: 1px solid var(--fa-line);
  font-weight: 600; font-size: .9em; white-space: nowrap; }
.fa-key .bi-box-arrow-up { color: #2F7DF6; }
.fa-install-note { font-size: .88rem; color: var(--fa-muted); border-top: 1px dashed var(--fa-line); padding-top: .75rem; margin: .25rem 0 0; }
.fa-install-warn { display: flex; gap: .5rem; }
.fa-install-done { display: flex; gap: .75rem; align-items: center; background: #EAF7EC; border: 1px solid #BFE3C6; color: #24613A; border-radius: 16px; padding: .8rem 1rem; }
.fa-install-why { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
.fa-install-why > div { display: flex; gap: .7rem; align-items: flex-start; font-size: .92rem; color: var(--fa-muted); }
.fa-install-why .bi { font-size: 1.3rem; color: var(--fa-honey); }
.fa-install-why strong { color: var(--fa-ink); display: block; }

/* Hình minh hoạ các bước trên iPhone */
.fa-install-pic { display: block; width: 100%; height: auto; margin: .25rem 0 .9rem; border-radius: 14px; border: 1px solid var(--fa-line); background: #fff; }

/* ---------- Mã QR cho người dùng máy tính (ẩn trên điện thoại vì không cần) ---------- */
.fa-qr-card { display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; background: var(--fa-surface); border: 1px solid var(--fa-line);
  border-radius: var(--fa-radius); padding: 1.25rem; box-shadow: var(--fa-shadow); }
.fa-qr-card img { width: 200px; height: 200px; image-rendering: pixelated; border-radius: 12px; background: #fff; border: 1px solid var(--fa-line); flex: none; }
.fa-qr-card > div { flex: 1 1 260px; }
.fa-qr-card code { word-break: break-all; color: var(--fa-amber-dark); }
.fa-qr-warn { color: #8A5A00; background: #FFF4D6; border-radius: 10px; padding: .5rem .75rem; }
.fa-pf-ios .fa-qr-card, .fa-pf-android .fa-qr-card { display: none; }
.fa-reinvite .btn-link { color: var(--fa-amber-dark); }

/* ---------- Tải hướng dẫn sử dụng (trang Cài đặt hướng dẫn) ---------- */
.fa-guide-download { border-top: 1px dashed var(--fa-line); margin-top: 1.75rem; padding-top: 1.5rem; }

@media (prefers-reduced-motion: reduce) {
  .fa-pwa-banner, .fa-pwa-toast { transition: opacity .2s; }
  .fa-pwa-back, .fa-install-hero img { animation: none; }
}