/* ════════════════════════════════════════════════════════════
   PWA install banner
   ════════════════════════════════════════════════════════════ */

.install-veil {
  /* M2 fix: 改 transparent + pointer-events: none 让 click 穿透到下面的 tab
     原本 60% 黑全屏覆盖（拦截所有 click）= Felix "点中/长期全黑"根因
     install-card 内 ic-actions 已有"稍后/不再提示"关闭按钮，不需要 veil onClick */
  position: absolute;
  inset: 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  pointer-events: none;
  z-index: 90;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 24px 20px 96px;
  animation: veilIn 220ms var(--ease-out);
}

.install-card {
  /* M2 fix: 配合 veil pointer-events:none，card 自身保留交互 */
  pointer-events: auto;
  width: 100%;
  max-width: 340px;
  background: var(--bg-1);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 22px 22px 14px;
  box-shadow: 0 24px 64px color-mix(in oklab, #000 50%, transparent);
  animation: instCard 320ms var(--ease-out);
  display: flex; flex-direction: column;
  position: relative;
}
@keyframes instCard {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.ic-mast {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-paper);
  font-family: var(--font-mono);
  font-weight: 700;
  text-align: center;
  margin-bottom: 14px;
  position: relative;
}
.ic-mast::before, .ic-mast::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 36px;
  height: 1px;
  background: var(--border);
}
.ic-mast::before { left: 0; }
.ic-mast::after { right: 0; }

.ic-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}
.ic-icon img {
  border-radius: 12px;
  box-shadow: 0 4px 12px color-mix(in oklab, #000 30%, transparent);
}

.ic-ttl {
  font-family: var(--font-serif, var(--font-sans));
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  text-align: center;
  margin-bottom: 4px;
  letter-spacing: -0.005em;
}
.ic-sub {
  font-size: 11.5px;
  color: var(--text-2);
  text-align: center;
  line-height: 1.5;
  padding: 0 4px;
  margin-bottom: 16px;
  text-wrap: pretty;
}

.ic-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-1);
  background: var(--bg-0);
}
.step.center { justify-content: center; text-align: center; color: var(--text-2); }
.step-n {
  flex: 0 0 auto;
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1px solid var(--accent-paper);
  color: var(--accent-paper);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.step > span:nth-child(2) { flex: 1; text-wrap: pretty; }
.step-glyph {
  flex: 0 0 auto;
  color: var(--accent-paper);
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
}

.install-btn {
  border: none;
  background: var(--accent-paper);
  color: #0c0e12;
  padding: 11px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  width: 100%;
  font-family: inherit;
  transition: transform var(--dur-1) var(--ease-out), filter var(--dur-1);
}
.install-btn:hover { filter: brightness(1.08); }
.install-btn:active { transform: scale(0.97); }

.ic-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 12px;
}
.ic-actions .dim {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 11px;
  letter-spacing: 0.04em;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--dur-1), color var(--dur-1);
}
.ic-actions .dim:hover { background: var(--bg-2); color: var(--text-1); }
.ic-actions .dim.subtle { border: none; }

.ic-foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  color: var(--text-3);
}
.ic-foot .d {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--text-3);
}
.ic-foot .d.on { background: var(--up-strong); box-shadow: 0 0 4px var(--up-strong); }
.ic-foot .sep { width: 1px; height: 8px; background: var(--border); margin: 0 4px; }