/* ============================================================
 * ChevalTools · PWA Install Popup (Bottom-Sheet, OS-Tabs)
 * ------------------------------------------------------------
 * Drop-in styles — no Bootstrap dependency.
 * Variable names are scoped with --ctpwa-* to avoid clashing
 * with the page's existing :root tokens.
 * ============================================================ */
:root {
  --ctpwa-primary: #1a365d;
  --ctpwa-accent: #38a169;
  --ctpwa-accent-light: #68d391;
  --ctpwa-accent-dark: #2f855a;
  --ctpwa-accent-soft: rgba(56, 161, 105, 0.10);
  --ctpwa-warm: #ed8936;
  --ctpwa-warm-soft: rgba(237, 137, 54, 0.08);
  --ctpwa-text: #1a202c;
  --ctpwa-body: #4a5568;
  --ctpwa-muted: #718096;
  --ctpwa-border: #e2e8f0;
  --ctpwa-border-strong: #cbd5e0;
  --ctpwa-surface: #ffffff;
  --ctpwa-sunken: #f1f5f9;
  --ctpwa-display: 'Outfit', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --ctpwa-body-font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

/* Scrim ------------------------------------------------------ */
.ctpwa-scrim {
  position: fixed; inset: 0; z-index: 99998;
  background: rgba(15, 20, 30, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  opacity: 0;
  animation: ctpwa-scrim-in .22s ease forwards;
}
.ctpwa-scrim.is-closing {
  animation: ctpwa-scrim-out .2s ease forwards;
}
@keyframes ctpwa-scrim-in { to { opacity: 1; } }
@keyframes ctpwa-scrim-out { to { opacity: 0; } }

/* Sheet ------------------------------------------------------ */
.ctpwa-sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 99999;
  background: var(--ctpwa-surface);
  border-radius: 24px 24px 0 0;
  box-shadow: 0 -16px 48px rgba(0, 0, 0, 0.25);
  padding-bottom: env(safe-area-inset-bottom, 24px);
  max-height: 92vh;
  display: flex; flex-direction: column;
  font-family: var(--ctpwa-body-font);
  color: var(--ctpwa-body);
  transform: translateY(100%);
  animation: ctpwa-sheet-in .28s cubic-bezier(.2,.8,.2,1) forwards;
  -webkit-font-smoothing: antialiased;
}
.ctpwa-sheet.is-closing {
  animation: ctpwa-sheet-out .22s ease-in forwards;
}
@keyframes ctpwa-sheet-in  { to { transform: translateY(0); } }
@keyframes ctpwa-sheet-out { to { transform: translateY(100%); } }

/* On desktop centre it instead of full-width */
@media (min-width: 720px) {
  .ctpwa-sheet {
    left: 50%; right: auto;
    transform: translate(-50%, 100%);
    width: 440px;
    border-radius: 24px;
    bottom: 28px;
    animation: ctpwa-sheet-in-desktop .28s cubic-bezier(.2,.8,.2,1) forwards;
  }
  @keyframes ctpwa-sheet-in-desktop {
    to { transform: translate(-50%, 0); }
  }
  .ctpwa-sheet.is-closing {
    animation: ctpwa-sheet-out-desktop .22s ease-in forwards;
  }
  @keyframes ctpwa-sheet-out-desktop {
    to { transform: translate(-50%, 100%); }
  }
}

/* Grabber */
.ctpwa-grabber {
  width: 40px; height: 4px; border-radius: 2px;
  background: var(--ctpwa-border-strong);
  margin: 10px auto 0;
  flex-shrink: 0;
  cursor: pointer;
}

/* Header ----------------------------------------------------- */
.ctpwa-head {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 20px 0;
  flex-shrink: 0;
}
.ctpwa-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(26, 54, 93, 0.25);
  flex-shrink: 0;
}
.ctpwa-head-text { flex: 1; min-width: 0; }
.ctpwa-title {
  font-family: var(--ctpwa-display);
  font-weight: 800; font-size: 18px;
  color: var(--ctpwa-text);
  letter-spacing: -0.3px;
  line-height: 1.2;
  margin: 0;
}
.ctpwa-sub {
  font-size: 12px; color: var(--ctpwa-muted);
  margin-top: 2px;
}
.ctpwa-close {
  width: 32px; height: 32px;
  border: none; background: var(--ctpwa-sunken);
  border-radius: 8px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--ctpwa-muted);
  transition: background .15s ease, color .15s ease;
  flex-shrink: 0;
}
.ctpwa-close:hover { background: var(--ctpwa-border); color: var(--ctpwa-text); }

/* OS toggle -------------------------------------------------- */
.ctpwa-tabs {
  margin: 16px 20px 0;
  padding: 3px;
  background: var(--ctpwa-sunken);
  border-radius: 10px;
  display: flex; gap: 3px;
  flex-shrink: 0;
}
.ctpwa-tab {
  flex: 1; border: none; cursor: pointer;
  padding: 8px 0; border-radius: 8px;
  background: transparent;
  color: var(--ctpwa-muted);
  font-weight: 700; font-size: 12px;
  font-family: var(--ctpwa-body-font);
  transition: background .15s ease, color .15s ease, box-shadow .15s ease;
}
.ctpwa-tab.is-active {
  background: var(--ctpwa-surface);
  color: var(--ctpwa-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* Scrollable body ------------------------------------------- */
.ctpwa-body {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 14px 20px 0;
  flex: 1;
}

/* Steps ------------------------------------------------------ */
.ctpwa-steps { list-style: none; padding: 0; margin: 0; }
.ctpwa-step {
  display: flex; gap: 12px; padding: 10px 0;
  border-bottom: 1px solid var(--ctpwa-border);
}
.ctpwa-step:last-child { border-bottom: none; }
.ctpwa-step-num {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--ctpwa-accent-soft);
  color: var(--ctpwa-accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--ctpwa-display);
  font-weight: 800; font-size: 13px;
  flex-shrink: 0;
}
.ctpwa-step-text { flex: 1; min-width: 0; }
.ctpwa-step-title {
  font-size: 13px; font-weight: 700;
  color: var(--ctpwa-text);
  display: flex; align-items: center; gap: 6px;
  flex-wrap: wrap;
  line-height: 1.3;
}
.ctpwa-step-title svg { flex-shrink: 0; }
.ctpwa-step-desc {
  font-size: 11.5px;
  color: var(--ctpwa-muted);
  margin-top: 2px;
  line-height: 1.45;
}

/* Tip box ---------------------------------------------------- */
.ctpwa-tip {
  margin: 14px 0 4px;
  padding: 10px 12px;
  background: var(--ctpwa-warm-soft);
  border-radius: 10px;
  display: flex; gap: 8px; align-items: flex-start;
  font-size: 11.5px; color: var(--ctpwa-body);
  line-height: 1.45;
}
.ctpwa-tip svg { flex-shrink: 0; color: var(--ctpwa-warm); margin-top: 1px; }
.ctpwa-tip b { color: var(--ctpwa-text); }

/* Footer ----------------------------------------------------- */
.ctpwa-foot {
  padding: 16px 20px 4px;
  display: flex; gap: 10px;
  flex-shrink: 0;
}
.ctpwa-btn {
  height: 44px;
  border-radius: 999px;
  font-family: var(--ctpwa-body-font);
  font-size: 13px; font-weight: 700;
  cursor: pointer;
  transition: transform .08s ease, background .15s ease, color .15s ease;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
}
.ctpwa-btn:active { transform: scale(0.98); }
.ctpwa-btn-ghost {
  flex: 1;
  background: transparent;
  border: 2px solid var(--ctpwa-border);
  color: var(--ctpwa-body);
}
.ctpwa-btn-ghost:hover { background: var(--ctpwa-sunken); }
.ctpwa-btn-primary {
  flex: 1.4;
  background: var(--ctpwa-accent);
  color: #fff;
  border: none;
  box-shadow: 0 6px 16px rgba(56, 161, 105, 0.35);
  font-weight: 800;
}
.ctpwa-btn-primary:hover { background: var(--ctpwa-accent-dark); }

/* Already-installed success banner --------------------------- */
.ctpwa-success {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; margin: 14px 20px 0;
  background: var(--ctpwa-accent-soft);
  border-radius: 10px;
  color: var(--ctpwa-accent-dark);
  font-size: 12px; font-weight: 700;
}

/* Reduced motion ------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .ctpwa-scrim, .ctpwa-sheet,
  .ctpwa-scrim.is-closing, .ctpwa-sheet.is-closing { animation: none; }
  .ctpwa-sheet { transform: translateY(0); }
  @media (min-width: 720px) {
    .ctpwa-sheet { transform: translate(-50%, 0); }
  }
}