/* E-chat v1.6.5 — installable standalone PWA shell with system-safe chrome. */
:root{
  --pwa-safe-top:env(safe-area-inset-top,0px);
  --pwa-safe-right:env(safe-area-inset-right,0px);
  --pwa-safe-bottom:env(safe-area-inset-bottom,0px);
  --pwa-safe-left:env(safe-area-inset-left,0px);
  --pwa-vh:100dvh;
  --pwa-bg:#0f1821;
}
html.pwa-installed{background:var(--pwa-bg);overscroll-behavior:none}
body.pwa-installed{
  width:100%;height:var(--pwa-vh);min-height:var(--pwa-vh);max-height:var(--pwa-vh);
  overflow:hidden;overscroll-behavior:none;-webkit-overflow-scrolling:touch;
  -webkit-tap-highlight-color:transparent;background:var(--pwa-bg);
}
body.pwa-installed #app{
  width:100%;height:var(--pwa-vh);min-height:var(--pwa-vh);max-height:var(--pwa-vh);
}
body.pwa-installed{padding:0!important}
/* Standalone is deliberately NOT fullscreen. System status/navigation areas remain
   owned by the OS while E-chat honors the safe-area insets inside its own shell. */
body.pwa-installed{
  --pwa-system-top:env(safe-area-inset-top,0px);
  --pwa-system-bottom:env(safe-area-inset-bottom,0px);
}
body.pwa-installed .pwa-browser-chip,body.pwa-installed .pwa-install-layer{display:none!important}

/* Keep the native shell flush to the physical screen in installed mode. */
@media (display-mode:standalone){
  html,body{width:100%;height:100dvh;min-height:100dvh;max-height:100dvh;overflow:hidden!important;overscroll-behavior:none!important}
  body{-webkit-touch-callout:none}
  input,textarea,select,[contenteditable="true"],.message-text{-webkit-touch-callout:default}
  .app-shell,.main-page{min-height:0!important;max-height:var(--pwa-vh)!important}
}

/* Browser-mode install chip. It disappears completely once launched from the app icon. */
.pwa-browser-chip{
  position:fixed;z-index:299;left:max(10px,var(--pwa-safe-left));right:max(10px,var(--pwa-safe-right));
  bottom:calc(max(10px,var(--pwa-safe-bottom)) + 4px);margin:auto;max-width:520px;
  display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:10px;
  padding:9px 10px;border-radius:18px;border:1px solid rgba(51,144,236,.22);
  background:color-mix(in srgb,var(--panel,#17212b) 95%,transparent);color:var(--text,#f4f8fb);
  box-shadow:0 18px 58px rgba(0,0,0,.28);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  transform:translateY(calc(100% + 32px));opacity:0;pointer-events:none;transition:transform .2s ease,opacity .2s ease;
  direction:rtl;
}
.pwa-browser-chip.is-open{transform:none;opacity:1;pointer-events:auto}
.pwa-browser-chip-icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(145deg,#12e6d4,#3390ec);color:#07131d;box-shadow:0 8px 24px rgba(18,230,212,.18)}
.pwa-browser-chip-icon svg{width:23px;height:23px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.pwa-browser-chip-copy{display:grid;gap:1px;min-width:0}.pwa-browser-chip-copy strong{font-size:12px;line-height:1.5}.pwa-browser-chip-copy span{font-size:10px;line-height:1.55;color:var(--muted,#9aabba);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pwa-browser-chip-action{height:36px;padding:0 13px;border:0;border-radius:12px;background:var(--blue,#3390ec);color:#fff;font:inherit;font-size:11px;font-weight:900;cursor:pointer;white-space:nowrap}
.pwa-browser-chip-close{position:absolute;inset-inline-start:5px;top:-9px;width:25px;height:25px;border-radius:50%;border:1px solid var(--line,rgba(255,255,255,.1));background:var(--panel,#17212b);color:var(--muted,#9aabba);display:grid;place-items:center;font-size:17px;line-height:1}
body.native-chat-active .pwa-browser-chip{display:none!important}

/* Platform-specific install bottom sheet. */
.pwa-install-layer{position:fixed;inset:0;z-index:700;display:grid;align-items:end;justify-items:center;padding:16px max(12px,var(--pwa-safe-right)) calc(12px + var(--pwa-safe-bottom)) max(12px,var(--pwa-safe-left));direction:rtl}
.pwa-install-layer[hidden]{display:none!important}
.pwa-install-scrim{position:absolute;inset:0;background:rgba(3,10,18,.66);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.pwa-install-card{position:relative;width:min(100%,520px);max-height:min(82dvh,720px);overflow:auto;overscroll-behavior:contain;border:1px solid color-mix(in srgb,#3390ec 24%,var(--line,rgba(255,255,255,.12)));border-radius:28px;background:var(--panel,#17212b);color:var(--text,#f4f8fb);box-shadow:0 32px 100px rgba(0,0,0,.48);padding:10px 14px 14px;animation:pwaSheetUp .2s cubic-bezier(.2,.8,.2,1)}
.pwa-install-handle{width:42px;height:4px;border-radius:999px;background:var(--line,rgba(255,255,255,.15));margin:1px auto 13px}
.pwa-install-head{display:grid;grid-template-columns:54px minmax(0,1fr) 38px;align-items:center;gap:11px;margin-bottom:12px}
.pwa-install-logo{width:54px;height:54px;border-radius:18px;object-fit:cover;box-shadow:0 10px 30px rgba(18,230,212,.18)}
.pwa-install-title{display:grid;gap:2px}.pwa-install-title strong{font-size:17px}.pwa-install-title span{font-size:11px;color:var(--muted,#9aabba);line-height:1.65}
.pwa-install-x{width:36px;height:36px;border-radius:12px;border:0;background:var(--panel2,#1d2b37);color:var(--muted,#9aabba);font-size:22px;display:grid;place-items:center}
.pwa-install-note{display:grid;gap:4px;padding:11px 12px;border-radius:17px;background:color-mix(in srgb,#3390ec 8%,var(--panel2,#1d2b37));border:1px solid color-mix(in srgb,#3390ec 16%,var(--line,rgba(255,255,255,.12)));margin-bottom:11px}
.pwa-install-note strong{font-size:12px}.pwa-install-note span{font-size:10.5px;color:var(--muted,#9aabba);line-height:1.7}
.pwa-install-note.is-warning{background:rgba(239,68,68,.08);border-color:rgba(239,68,68,.2)}.pwa-install-note.is-warning strong{color:#ff7777}
.pwa-install-steps{display:grid;gap:8px;margin:11px 0}.pwa-install-step{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;align-items:center;padding:9px 10px;border-radius:16px;background:var(--panel2,#1d2b37)}
.pwa-install-step b{width:34px;height:34px;border-radius:12px;background:color-mix(in srgb,#12e6d4 12%,var(--panel,#17212b));color:#12e6d4;display:grid;place-items:center;font-size:13px}.pwa-install-step div{display:grid;gap:1px}.pwa-install-step strong{font-size:12px}.pwa-install-step span{font-size:10px;color:var(--muted,#9aabba);line-height:1.6}
.pwa-install-actions{display:grid;grid-template-columns:1fr auto;gap:8px;margin-top:12px}.pwa-install-primary,.pwa-install-secondary{height:48px;border-radius:16px;font:inherit;font-weight:900;cursor:pointer}.pwa-install-primary{border:0;background:linear-gradient(135deg,#3390ec,#1678d5);color:#fff}.pwa-install-secondary{border:1px solid var(--line,rgba(255,255,255,.12));background:var(--panel2,#1d2b37);color:var(--text,#f4f8fb);padding-inline:15px}
.pwa-install-actions.single{grid-template-columns:1fr}
@keyframes pwaSheetUp{from{transform:translateY(24px);opacity:.3}to{transform:none;opacity:1}}

/* On tiny iPhones keep the install UI compact. */
@media(max-width:380px){
  .pwa-browser-chip{grid-template-columns:38px minmax(0,1fr) auto;padding:8px}.pwa-browser-chip-icon{width:38px;height:38px;border-radius:13px}.pwa-browser-chip-copy span{display:none}.pwa-browser-chip-action{padding-inline:10px}
  .pwa-install-card{border-radius:24px;padding-inline:11px}.pwa-install-head{grid-template-columns:48px minmax(0,1fr) 34px}.pwa-install-logo{width:48px;height:48px;border-radius:16px}.pwa-install-title strong{font-size:15px}
}
@media(max-width:860px) and (orientation:landscape) and (max-height:520px){
  .pwa-install-layer{align-items:center}.pwa-install-card{max-height:92dvh;max-width:640px}.pwa-install-head{margin-bottom:7px}.pwa-install-steps{grid-template-columns:repeat(3,1fr);gap:6px}.pwa-install-step{grid-template-columns:1fr;text-align:center;justify-items:center;padding:7px}.pwa-install-step span{display:none}
}
@media(prefers-reduced-motion:reduce){.pwa-browser-chip,.pwa-install-card{transition:none!important;animation:none!important}}