/* ============================================================
   ClawValley Battle Arena — PWA Styles
   Install banner, offline indicator, reconnect flash
   ============================================================ */

:root {
  --pwa-banner-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --pwa-banner-text: #ffffff;
  --pwa-banner-radius: 16px 16px 0 0;
  --pwa-banner-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
  --pwa-banner-z: 10000;
  --pwa-offline-bg: #e53e3e;
  --pwa-offline-text: #ffffff;
  --pwa-offline-z: 10001;
  --pwa-online-bg: #38a169;
  --pwa-online-text: #ffffff;
}

/* ── Dark mode overrides ──────────────────────────────────── */

@media (prefers-color-scheme: dark) {
  :root {
    --pwa-banner-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
  }
}

.dark-mode {
  --pwa-banner-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
}

/* ── Install Banner ───────────────────────────────────────── */

#pwa-install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--pwa-banner-z);
  background: var(--pwa-banner-bg);
  color: var(--pwa-banner-text);
  border-radius: var(--pwa-banner-radius);
  box-shadow: var(--pwa-banner-shadow);
  padding: 14px 16px;
  transform: translateY(100%);
  opacity: 0;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1), opacity 300ms ease;
  will-change: transform, opacity;
}

#pwa-install-banner.pwa-banner--visible {
  transform: translateY(0);
  opacity: 1;
}

.pwa-banner-content {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.pwa-banner-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.pwa-banner-text {
  flex: 1;
  min-width: 0;
}

.pwa-banner-title {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}

.pwa-banner-subtitle {
  display: block;
  font-size: 0.82rem;
  opacity: 0.85;
  line-height: 1.3;
}

.pwa-install-btn {
  flex-shrink: 0;
  padding: 8px 20px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 200ms ease, border-color 200ms ease;
  -webkit-tap-highlight-color: transparent;
}

.pwa-install-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: #fff;
}

.pwa-install-btn:active {
  transform: scale(0.96);
}

.pwa-dismiss-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.8);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 200ms ease;
  -webkit-tap-highlight-color: transparent;
}

.pwa-dismiss-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  color: #fff;
}

/* ── Offline Indicator ────────────────────────────────────── */

body.pwa-offline::before {
  content: '⚠ You are offline';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--pwa-offline-z);
  background: var(--pwa-offline-bg);
  color: var(--pwa-offline-text);
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 7px 16px;
  pointer-events: none;
  animation: pwa-drop-in 250ms ease both;
}

@keyframes pwa-drop-in {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}

/* ── Online Recovery Flash ────────────────────────────────── */

body.pwa-reconnected::after {
  content: '✓ Back online';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--pwa-offline-z);
  background: var(--pwa-online-bg);
  color: var(--pwa-online-text);
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 7px 16px;
  pointer-events: none;
  animation: pwa-flash-out 3s ease forwards;
}

@keyframes pwa-flash-out {
  0%   { opacity: 1; transform: translateY(0); }
  70%  { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-100%); }
}

/* ── Safe-area inset support (iPhone notch etc.) ──────────── */

@supports (padding-bottom: env(safe-area-inset-bottom)) {
  #pwa-install-banner {
    padding-bottom: calc(14px + env(safe-area-inset-bottom));
  }
}

/* ── Mobile Responsive ────────────────────────────────────── */

@media (max-width: 480px) {
  .pwa-banner-content {
    flex-wrap: wrap;
    gap: 8px;
  }

  .pwa-banner-icon {
    font-size: 1.5rem;
  }

  .pwa-banner-title {
    font-size: 0.88rem;
  }

  .pwa-banner-subtitle {
    display: none;
  }

  .pwa-install-btn {
    flex: 1;
    text-align: center;
    padding: 8px 12px;
  }
}

@media (max-width: 360px) {
  .pwa-banner-icon {
    display: none;
  }
}

/* ── Reduced motion ───────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  #pwa-install-banner,
  #pwa-install-banner.pwa-banner--visible {
    animation: none;
    transition: opacity 150ms ease;
  }
  body.pwa-offline::before,
  body.pwa-reconnected::after {
    animation: none;
  }
}