html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}




/* Container dello stack di foto */
.photo-stack {
    position: relative;
    width: 100%;
    padding-top: 75%; /* Aspect Ratio 4:3 */
    margin-bottom: 15px;
}

/* Base comune per tutte le foto nello stack */
.photo-stack img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    border: 3px solid #fff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Foto in primo piano (Cover) */
.photo-stack img.cover-photo {
    z-index: 4;
}

/* Foto sfalsate sotto la cover */
.photo-stack img.stack-1 {
    z-index: 3;
    transform: translate(-6px, 6px) rotate(-2deg);
    opacity: 0.9;
}

.photo-stack img.stack-2 {
    z-index: 2;
    transform: translate(6px, 12px) rotate(3deg);
    opacity: 0.75;
}

.photo-stack img.stack-3 {
    z-index: 1;
    transform: translate(-10px, 18px) rotate(-4deg);
    opacity: 0.6;
}

/* Hover Effect: apre lo stack a ventaglio */
.album-card:hover .photo-stack img.cover-photo {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

.album-card:hover .photo-stack img.stack-1 {
    transform: translate(-12px, 8px) rotate(-5deg);
}

.album-card:hover .photo-stack img.stack-2 {
    transform: translate(12px, 16px) rotate(6deg);
}

.album-card:hover .photo-stack img.stack-3 {
    transform: translate(-18px, 24px) rotate(-8deg);
}