/* ============================================
   VS Print Studio — Mobile App Footer
   ============================================ */

.vs21-footer-app {
  display: block;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 9999;
  padding-bottom: env(safe-area-inset-bottom);
  background:
    linear-gradient(180deg, rgba(10, 18, 31, 0.84) 0%, rgba(6, 17, 31, 0.94) 100%);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 -10px 28px rgba(0, 0, 0, 0.22),
    0 -1px 0 rgba(255, 255, 255, 0.03) inset;
  overflow: hidden;
}

.vs21-footer-app::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 0%, rgba(70, 194, 255, 0.08), transparent 32%),
    linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
  opacity: 0.9;
}

.vs21-footer-nav {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: end;
  padding: 6px 8px 7px;
  max-width: 620px;
  margin: 0 auto;
}

.vs21-footer-nav .nav-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 3px;
  min-height: 50px;
  color: var(--vs-text, #ffffff);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.18s ease, color 0.22s ease, opacity 0.22s ease;
  opacity: 0.92;
}

.vs21-footer-nav .nav-item:hover {
  color: var(--vs-primary-soft, #46c2ff);
  opacity: 1;
}

.vs21-footer-nav .nav-item:active {
  transform: translateY(1px) scale(0.97);
}

.vs21-footer-nav .nav-item::after {
  content: "";
  position: absolute;
  bottom: 2px;
  width: 22px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(70,194,255,0), rgba(70,194,255,0.95), rgba(70,194,255,0));
  opacity: 0;
  transform: scaleX(0.7);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.vs21-footer-nav .nav-item:hover::after,
.vs21-footer-nav .nav-item:focus-visible::after {
  opacity: 0.9;
  transform: scaleX(1);
}

.vs21-footer-nav .icon {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  margin-bottom: 1px;
  transition: transform 0.22s ease, filter 0.22s ease, opacity 0.22s ease;
}

.vs21-footer-nav .nav-item:hover .icon {
  transform: translateY(-1px);
}

.vs21-footer-nav .label {
  font-size: 9px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: inherit;
}

/* WhatsApp center item */
.vs21-footer-nav .nav-item:nth-child(3) {
  transform: translateY(-3px);
  opacity: 1;
}

.vs21-footer-nav .nav-item:nth-child(3)::after {
  display: none;
}

/* WhatsApp center highlight — reduced */
.vs21-footer-nav .nav-item:nth-child(3) .icon {
  position: relative;
  width: 38px;
  height: 38px;
  margin-bottom: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 17px;
  color: #fff;
  background:
    radial-gradient(circle at 30% 28%, rgba(255,255,255,0.20), transparent 28%),
    linear-gradient(135deg, #29e070 0%, #20c65e 52%, #16a34a 100%);
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow:
    0 4px 10px rgba(0, 0, 0, 0.22),
    0 0 10px rgba(37, 211, 102, 0.32);
  transform: translateY(0);
  transition: transform 0.22s ease, box-shadow 0.22s ease, filter 0.22s ease;
  overflow: hidden;
}

.vs21-footer-nav .nav-item:nth-child(3) .icon::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.00) 42%),
    radial-gradient(circle at 50% 120%, rgba(0,0,0,0.12), transparent 45%);
  pointer-events: none;
}

.vs21-footer-nav .nav-item:nth-child(3) .icon::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(37, 211, 102, 0.16);
  opacity: 0.35;
  animation: vs21-whatsapp-pulse 2.8s ease-out infinite;
}

.vs21-footer-nav .nav-item:nth-child(3) .icon i {
  position: relative;
  z-index: 2;
  transform: translateY(1px);
}

.vs21-footer-nav .nav-item:nth-child(3):hover .icon,
.vs21-footer-nav .nav-item:nth-child(3):focus-visible .icon {
  transform: translateY(-1px) scale(1.02);
  box-shadow:
    0 6px 12px rgba(0, 0, 0, 0.24),
    0 0 14px rgba(37, 211, 102, 0.40);
}

.vs21-footer-nav .nav-item:nth-child(3):active .icon {
  transform: translateY(1px) scale(0.96);
  box-shadow:
    0 3px 8px rgba(0, 0, 0, 0.20),
    0 0 8px rgba(37, 211, 102, 0.28);
}

.vs21-footer-nav .nav-item:nth-child(3) .label {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.pulse-effect {
  transition: transform 0.12s cubic-bezier(0.2, 0, 0.38, 0.9);
}

.pulse-effect:active {
  transform: scale(0.96);
}

.vs21-footer-nav .nav-item:focus-visible {
  outline: none;
}

.vs21-footer-nav .nav-item:focus-visible .icon {
  filter: drop-shadow(0 0 10px rgba(70, 194, 255, 0.28));
}

.vs21-footer-nav .nav-item:focus-visible .label {
  color: var(--vs-primary-soft, #46c2ff);
}

@keyframes vs21-whatsapp-pulse {
  0% {
    transform: scale(0.96);
    opacity: 0.35;
  }
  70% {
    transform: scale(1.08);
    opacity: 0;
  }
  100% {
    transform: scale(1.08);
    opacity: 0;
  }
}

@media (min-width: 768px) {
  .vs21-footer-app {
    display: none;
  }
}

@media (max-width: 767px) {
  body {
    padding-bottom: 74px;
  }
}

@media (max-width: 380px) {
  .vs21-footer-nav {
    padding-left: 4px;
    padding-right: 4px;
  }

  .vs21-footer-nav .label {
    font-size: 8px;
  }

  .vs21-footer-nav .nav-item:nth-child(3) {
    transform: translateY(-2px);
  }

  .vs21-footer-nav .nav-item:nth-child(3) .icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
}