:root {
  --pwai-bg: #111827;
  --pwai-fg: #ffffff;
  --pwai-surface: rgba(17, 24, 39, 0.96);
  --pwai-surface-soft: rgba(17, 24, 39, 0.84);
  --pwai-border: rgba(255, 255, 255, 0.16);
  --pwai-muted: rgba(255, 255, 255, 0.84);
  --pwai-shadow: 0 22px 64px rgba(0, 0, 0, 0.28);
  --pwai-radius: 26px;
  --pwai-gap: 16px;
}

@media (prefers-color-scheme: light) {
  :root {
    --pwai-bg: #ffffff;
    --pwai-fg: #111827;
    --pwai-surface: rgba(255, 255, 255, 0.96);
    --pwai-surface-soft: rgba(255, 255, 255, 0.90);
    --pwai-border: rgba(17, 24, 39, 0.10);
    --pwai-muted: rgba(17, 24, 39, 0.78);
    --pwai-shadow: 0 20px 50px rgba(15, 23, 42, 0.16);
  }

  .pwai-btn-secondary {
    background: rgba(17, 24, 39, 0.06);
    color: var(--pwai-fg);
    border-color: var(--pwai-border);
  }
}

#pwai-banner {
  position: fixed;
  z-index: 999999;
  display: none;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  width: min(560px, calc(100vw - 32px));
  margin: 0 auto;
  pointer-events: none;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

#pwai-banner.pwai-show {
  display: block;
  pointer-events: auto;
}

#pwai-banner:focus {
  outline: none;
}

.pwai-card {
  position: relative;
  border-radius: var(--pwai-radius);
  padding: 16px;
  color: var(--pwai-fg);
  background: linear-gradient(180deg, var(--pwai-surface), var(--pwai-surface-soft));
  border: 1px solid var(--pwai-border);
  box-shadow: var(--pwai-shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  overflow: hidden;
}

.pwai-top {
  display: flex;
  gap: 14px;
  align-items: center;
  padding-right: 44px;
}

.pwai-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  flex: none;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,.15), rgba(255,255,255,.06));
  border: 1px solid rgba(255,255,255,.12);
  display: grid;
  place-items: center;
}

.pwai-icon {
  width: 100%;
  height: 100%;
  border-radius: 18px;
  object-fit: cover;
  object-position: center;
  display: block;
  background: #fff;
}

.pwai-icon-fallback {
  position: absolute;
  inset: 0;
  display: none;
  place-items: center;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .04em;
  color: #fff;
  background: radial-gradient(circle at top, rgba(99,102,241,.9), rgba(17,24,39,.95));
}

.pwai-copy {
  min-width: 0;
}

.pwai-title {
  font-size: 18px;
  line-height: 1.2;
  margin: 0 0 4px;
  font-weight: 800;
}

.pwai-text {
  font-size: 13px;
  line-height: 1.5;
  margin: 0;
  color: var(--pwai-muted);
}

.pwai-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  margin-top: 14px;
}

.pwai-btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .15s ease, opacity .15s ease, background-color .15s ease, box-shadow .15s ease;
}

.pwai-btn:hover,
.pwai-btn:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.pwai-btn:focus-visible,
.pwai-close:focus-visible {
  box-shadow: 0 0 0 3px rgba(99,102,241,.35);
}

.pwai-btn-primary {
  background: #ffffff;
  color: #111827;
}

.pwai-btn-secondary {
  background: rgba(255,255,255,.10);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,.14);
}

.pwai-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 0;
  display: grid;
  place-items: center;
  padding: 0;
  margin: 0;
  background: rgba(255,255,255,.08);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  font-weight: 800;
  text-align: center;
  cursor: pointer;
}

.pwai-close:hover {
  background: rgba(255,255,255,.14);
}

.pwai-ios-tip {
  display: none;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 18px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.10);
  font-size: 13px;
  line-height: 1.5;
  color: var(--pwai-muted);
}

.pwai-screens {
  display: flex;
  gap: 10px;
  overflow: auto;
  padding-top: 12px;
  margin-top: 12px;
  border-top: 1px solid rgba(255,255,255,.10);
  scroll-snap-type: x proximity;
}

.pwai-screenshot {
  width: 124px;
  aspect-ratio: 3 / 4;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
  flex: none;
  border: 1px solid rgba(255,255,255,.12);
  scroll-snap-align: start;
  background: rgba(255,255,255,.06);
}

.pwai-credit-line {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12px;
  line-height: 1.4;
  color: var(--pwai-muted);
}

.pwai-credit-line a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pwai-pos-top {
  top: 16px;
  bottom: auto;
  transform: translateX(-50%);
}

.pwai-pos-middle {
  top: 50%;
  bottom: auto;
  transform: translate(-50%, -50%);
}

.pwai-pos-bottom {
  top: auto;
  bottom: 16px;
  transform: translateX(-50%);
}

.pwai-layout-popup {
  width: min(560px, calc(100vw - 32px));
}

.pwai-layout-topbar,
.pwai-layout-bottombar {
  width: calc(100vw - 32px);
  max-width: none;
  left: 16px;
  transform: none;
}

.pwai-layout-topbar .pwai-card,
.pwai-layout-bottombar .pwai-card {
  border-radius: 18px;
  padding: 12px 14px;
}

.pwai-layout-topbar .pwai-icon-wrap,
.pwai-layout-bottombar .pwai-icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: 14px;
}

.pwai-layout-topbar .pwai-title,
.pwai-layout-bottombar .pwai-title {
  font-size: 16px;
}

.pwai-layout-topbar .pwai-text,
.pwai-layout-bottombar .pwai-text {
  font-size: 12px;
}

.pwai-layout-topbar {
  top: 16px;
  bottom: auto;
}

.pwai-layout-bottombar {
  bottom: 16px;
  top: auto;
}

.pwai-layout-floating-left,
.pwai-layout-floating-right {
  width: min(360px, calc(100vw - 32px));
  max-width: 360px;
  transform: none;
  bottom: 16px;
}

.pwai-layout-floating-left {
  left: 16px;
  right: auto;
}

.pwai-layout-floating-right {
  right: 16px;
  left: auto;
}

.pwai-layout-floating-left .pwai-card,
.pwai-layout-floating-right .pwai-card {
  border-radius: 22px;
}

.pwai-layout-floating-left .pwai-actions {
  justify-content: flex-start;
}

.pwai-layout-floating-right .pwai-actions {
  justify-content: flex-end;
}

.pwai-layout-floating-left .pwai-top,
.pwai-layout-floating-right .pwai-top {
  padding-right: 42px;
}

.pwai-layout-bottom-sheet {
  width: min(640px, calc(100vw - 24px));
  left: 50%;
  transform: translateX(-50%);
  bottom: 12px;
}

.pwai-layout-bottom-sheet .pwai-card {
  border-radius: 26px 26px 22px 22px;
  padding-top: 18px;
}

.pwai-layout-bottom-sheet .pwai-card::before {
  content: "";
  display: block;
  width: 42px;
  height: 5px;
  border-radius: 999px;
  background: rgba(255,255,255,.25);
  margin: 0 auto 14px;
}

.pwai-layout-bottom-sheet .pwai-actions {
  justify-content: center;
}

.pwai-layout-fullscreen {
  inset: 0;
  width: 100vw;
  height: 100vh;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  transform: none;
  padding: 24px;
  display: grid;
  place-items: center;
  background: rgba(8, 15, 30, .62);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.pwai-layout-fullscreen .pwai-card {
  width: min(760px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  border-radius: 30px;
}

.pwai-layout-fullscreen .pwai-actions {
  justify-content: center;
}

.pwai-layout-fullscreen .pwai-close {
  top: 14px;
  right: 14px;
}

.pwai-layout-fullscreen .pwai-screens {
  margin-top: 14px;
}

[dir="rtl"] .pwai-top {
  flex-direction: row-reverse;
}

[dir="rtl"] .pwai-close {
  right: auto;
  left: 12px;
}

[dir="rtl"] .pwai-actions {
  flex-direction: row-reverse;
}

[dir="rtl"] .pwai-layout-floating-left {
  left: auto;
  right: 16px;
}

[dir="rtl"] .pwai-layout-floating-right {
  right: auto;
  left: 16px;
}

[dir="rtl"] .pwai-layout-topbar,
[dir="rtl"] .pwai-layout-bottombar {
  left: 16px;
  right: 16px;
}

@media (max-width: 640px) {
  #pwai-banner {
    width: calc(100vw - 20px);
  }

  .pwai-pos-top {
    top: 10px;
  }

  .pwai-pos-middle {
    top: 50%;
  }

  .pwai-pos-bottom {
    bottom: 10px;
  }

  .pwai-layout-topbar,
  .pwai-layout-bottombar {
    width: calc(100vw - 20px);
    left: 10px;
  }

  .pwai-layout-floating-left,
  .pwai-layout-floating-right {
    width: calc(100vw - 20px);
    max-width: none;
    left: 10px;
    right: 10px;
  }

  .pwai-layout-bottom-sheet {
    width: calc(100vw - 12px);
    bottom: 6px;
  }

  .pwai-layout-fullscreen {
    padding: 12px;
  }

  .pwai-layout-fullscreen .pwai-card {
    max-height: calc(100vh - 24px);
    border-radius: 24px;
  }

  .pwai-top {
    padding-right: 40px;
  }

  .pwai-actions {
    justify-content: flex-start;
  }

  .pwai-btn {
    width: 100%;
  }

  .pwai-layout-topbar .pwai-top,
  .pwai-layout-bottombar .pwai-top,
  .pwai-layout-floating-left .pwai-top,
  .pwai-layout-floating-right .pwai-top,
  .pwai-layout-bottom-sheet .pwai-top,
  .pwai-layout-fullscreen .pwai-top {
    padding-right: 40px;
  }

  .pwai-layout-bottom-sheet .pwai-card::before {
    margin-top: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pwai-btn,
  .pwai-close {
    transition: none;
  }
}

/* Admin */
.pwa-installer-admin .pwai-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pwa-installer-admin .pwai-panel {
  background: #fff;
  border: 1px solid #dcdcde;
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
}

.pwa-installer-admin .pwai-panel h2 {
  margin-top: 0;
}

.pwa-installer-admin .form-table th {
  width: 220px;
}

.pwai-shot-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.pwai-shot-row input[type="url"] {
  flex: 1;
  min-width: 240px;
}

.pwai-shot-row .pwai-remove-shot {
  white-space: nowrap;
}

.pwai-installer-note,
.pwa-installer-admin .description {
  color: #646970;
}

@media (max-width: 960px) {
  .pwa-installer-admin .pwai-grid {
    grid-template-columns: 1fr;
  }
}

/* Preview shell for admin live preview */
.pwai-preview-shell {
  position: relative;
  min-height: 420px;
  padding: 18px;
  border-radius: 22px;
  border: 1px dashed #c3c4c7;
  background: linear-gradient(180deg, rgba(17,24,39,.04), rgba(17,24,39,.02));
  overflow: hidden;
}

.pwai-preview-shell #pwai-preview-banner {
  position: relative;
  inset: auto;
  left: auto;
  right: auto;
  top: auto;
  bottom: auto;
  transform: none;
  width: 100%;
  max-width: none;
  display: block;
  pointer-events: none;
  margin: 0;
}

.pwai-preview-shell #pwai-preview-banner .pwai-card {
  pointer-events: auto;
}

.pwai-preview-shell .pwai-banner.pwai-show {
  display: block;
}