/*
 * Stefania Romito - Editorial Library & Book Selection
 * Signature Rose Gold Styling for Titles, Poetic Subtitles, and Boutique Pill CTA
 */

#opere {
  scroll-margin-top: 112px;
}

.sr-library {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(3.5rem, 6.5vw, 5.5rem) 0;
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--ink);
}

.sr-library__container {
  position: relative;
  z-index: 1;
}

/* Ornamental Literary Section Divider */
.sr-library__divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.35rem;
  width: min(34rem, 85%);
  margin: 0 auto 1.5rem;
  color: var(--accent);
}

.sr-library__divider::before,
.sr-library__divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-light));
}

.sr-library__divider::after {
  transform: scaleX(-1);
}

.sr-library__divider svg {
  display: block;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
}

/* Section Intro */
.sr-library__intro {
  text-align: center;
  max-width: 48rem;
  margin: 0 auto 3rem;
}

.sr-library__intro h2 {
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 3.8vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--accent);
  margin: 0 0 0.85rem;
}

.sr-library__intro p {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ink);
  margin: 0 auto;
  max-width: 54ch;
}

/* 4-Column Grid of Unified Physical Cards */
.sr-library__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1.25rem, 2.2vw, 1.85rem);
}

/* The Unified Editorial Book Card */
.sr-library-book {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow:
    0 4px 18px -4px color-mix(in srgb, var(--ink) 12%, transparent),
    0 2px 6px -2px color-mix(in srgb, var(--ink) 6%, transparent);
  transition:
    transform 0.4s var(--ease-out-quart),
    box-shadow 0.4s var(--ease-out-quart),
    border-color 0.4s var(--ease-out-quart);
}

.sr-library-book:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow:
    0 18px 36px -10px color-mix(in srgb, var(--accent) 25%, transparent),
    0 6px 14px -3px color-mix(in srgb, var(--ink) 10%, transparent);
}

/* 3D Stage (Pedestal Area) */
.sr-library-book__stage {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  min-height: 290px;
  padding: 2.25rem 1.25rem 1.75rem;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--surface) 85%, var(--bg)) 0%,
    color-mix(in srgb, var(--surface-muted) 55%, var(--surface)) 100%
  );
  border-bottom: 1px solid var(--border);
  perspective: 900px;
  text-decoration: none;
}

/* Soft Pedestal Shadow under the Book */
.sr-library-book__stage::after {
  content: '';
  position: absolute;
  bottom: 1.15rem;
  width: 62%;
  height: 14px;
  background: radial-gradient(ellipse at center, color-mix(in srgb, var(--ink) 30%, transparent) 0%, transparent 72%);
  border-radius: 50%;
  pointer-events: none;
  transition: transform 0.4s var(--ease-out-quart), opacity 0.4s var(--ease-out-quart);
}

.sr-library-book:hover .sr-library-book__stage::after {
  transform: scale(0.92);
  opacity: 0.65;
}

/* Authentic Physical Book Cover Mockup */
.sr-library-book__cover {
  position: relative;
  z-index: 1;
  width: auto;
  height: 235px;
  max-width: 86%;
  object-fit: contain;
  object-position: bottom;
  border-radius: 2px 4px 4px 2px;
  box-shadow:
    -3px 0 4px -1px color-mix(in srgb, var(--ink) 30%, transparent) inset,
    0 1px 2px rgba(255, 255, 255, 0.45) inset,
    6px 12px 22px -4px color-mix(in srgb, var(--ink) 35%, transparent),
    2px 4px 8px color-mix(in srgb, var(--ink) 15%, transparent);
  transform-origin: 50% 60%;
  backface-visibility: hidden;
  transition: transform 0.5s var(--ease-out-quart), filter 0.5s var(--ease-out-quart);
}

@media (prefers-reduced-motion: no-preference) {
  .sr-library-book__cover {
    animation: sr-library-float 6.5s ease-in-out infinite;
  }
  .sr-library-book:nth-child(2) .sr-library-book__cover {
    animation-duration: 7.2s;
    animation-delay: -2s;
  }
  .sr-library-book:nth-child(3) .sr-library-book__cover {
    animation-duration: 6.8s;
    animation-delay: -4s;
  }
  .sr-library-book:nth-child(4) .sr-library-book__cover {
    animation-duration: 7.6s;
    animation-delay: -1.2s;
  }
}

@keyframes sr-library-float {
  0%, 100% {
    transform: translateY(2px) rotateY(-8deg) rotateZ(-0.6deg);
  }
  50% {
    transform: translateY(-6px) rotateY(4deg) rotateZ(0.5deg);
  }
}

.sr-library-book:hover .sr-library-book__cover {
  animation-play-state: paused;
  transform: translateY(-8px) rotateY(-6deg) scale(1.025);
}

.sr-library.has-motion-observer .sr-library-book:not(.is-inview) .sr-library-book__cover,
.sr-library.is-motion-paused .sr-library-book__cover {
  animation-play-state: paused;
}

/* Card Body */
.sr-library-book__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.5rem 1.35rem 1.45rem;
  background-color: var(--bg);
  text-align: center;
}

/* Genre Pill Badge */
.sr-library-book__genre {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  padding: 0.32rem 0.95rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.2;
  margin: 0 0 0.85rem;
}

/* Book Title - Rosa Nostro (Rose Gold) */
.sr-library-book h3 {
  font-family: var(--font-display);
  font-size: 1.68rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--accent);
  margin: 0 0 0.35rem;
}

.sr-library-book h3 a {
  color: inherit;
  transition: color 0.25s var(--ease-out-quart);
}

.sr-library-book h3 a:hover {
  color: var(--ink);
}

/* Dopotitolo - Semibold nitido, visibile e marcato in Inchiostro */
.sr-library-book__subtitle {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
  margin: 0 0 0.85rem;
}

/* Excerpt - Sans-serif nitido e marcato in Inchiostro */
.sr-library-book__excerpt {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  margin: 0 0 1.5rem;
  flex-grow: 1;
}

/* Tactile Boutique Pill Button - "Scopri il libro" */
.sr-library-book__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  padding: 0.72rem 1.25rem;
  margin-top: auto;
  border-radius: 999px;
  background-color: var(--surface);
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-size: 0.78125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 2px 8px -2px color-mix(in srgb, var(--accent) 20%, transparent);
  transition:
    background-color 0.25s var(--ease-out-quart),
    color 0.25s var(--ease-out-quart),
    border-color 0.25s var(--ease-out-quart),
    box-shadow 0.25s var(--ease-out-quart),
    transform 0.25s var(--ease-out-quart);
}

.sr-library-book__link span[aria-hidden] {
  color: var(--accent);
  font-size: 1.05rem;
  line-height: 1;
  transition: transform 0.25s var(--ease-out-quart), color 0.25s var(--ease-out-quart);
}

.sr-library-book:hover .sr-library-book__link,
.sr-library-book__link:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  box-shadow: 0 8px 20px -4px color-mix(in srgb, var(--accent) 45%, transparent);
  transform: translateY(-2px);
}

.sr-library-book:hover .sr-library-book__link span[aria-hidden],
.sr-library-book__link:hover span[aria-hidden] {
  color: var(--bg);
  transform: translate(3px, -3px);
}

.sr-library a:focus-visible,
.sr-book-detail a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.sr-books-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Background Particles */
.sr-library__particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.sr-library__particle {
  position: absolute;
  top: var(--particle-y);
  width: 24px;
  height: 24px;
  color: var(--accent);
  opacity: 0.22;
}

.sr-library__particle.is-left {
  left: max(0.4rem, calc((100% - var(--container-max)) / 4));
}

.sr-library__particle.is-right {
  right: max(0.4rem, calc((100% - var(--container-max)) / 4));
}

.sr-library__particle svg {
  width: 100%;
  height: 100%;
  display: block;
}

.sr-library__particle.is-mote {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-light);
  opacity: 0.45;
}

@media (prefers-reduced-motion: no-preference) {
  .sr-library__particle {
    animation: sr-library-paper-drift var(--particle-duration) ease-in-out var(--particle-delay) infinite alternate;
  }
}

@keyframes sr-library-paper-drift {
  from { transform: translate3d(-3px, 8px, 0) rotate(-8deg); }
  to { transform: translate3d(4px, -10px, 0) rotate(7deg); }
}

.sr-library.is-motion-paused .sr-library__particle,
.sr-library.has-particles-observer:not(.particles-inview) .sr-library__particle {
  animation-play-state: paused;
}

/* ==========================================================================
   Single Book Detail Template
   ========================================================================== */
.sr-book-detail {
  background-color: var(--bg);
  padding: 2.5rem 0 5.5rem;
  min-height: 75vh;
}

.sr-book-detail__back {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 2.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sr-book-detail__back:hover {
  color: var(--ink);
}

.sr-book-detail__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.sr-book-detail__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: clamp(2rem, 4vw, 3.5rem);
  border-radius: 6px;
  box-shadow: 0 8px 24px -6px color-mix(in srgb, var(--ink) 12%, transparent);
}

.sr-book-detail__cover {
  width: min(100%, 300px);
  max-height: 480px;
  height: auto;
  object-fit: contain;
  border-radius: 2px 4px 4px 2px;
  box-shadow:
    -3px 0 4px -1px color-mix(in srgb, var(--ink) 30%, transparent) inset,
    6px 14px 28px -4px color-mix(in srgb, var(--ink) 35%, transparent),
    2px 4px 8px color-mix(in srgb, var(--ink) 15%, transparent);
}

.sr-book-detail__genre {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.9rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 1rem;
}

.sr-book-detail h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 4vw, 3.6rem);
  line-height: 1.08;
  color: var(--accent);
  margin: 0 0 0.6rem;
}

.sr-book-detail__subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  line-height: 1.4;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 1rem;
}

.sr-book-detail__credit {
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 0 0.35rem;
  font-weight: 600;
  color: var(--ink);
}

.sr-book-detail__publisher {
  font-size: 0.9375rem;
  color: var(--ink-muted);
  margin: 0 0 1.75rem;
}

.sr-book-detail__text {
  font-size: 1.0625rem;
  line-height: 1.8;
  max-width: 62ch;
  margin-bottom: 2rem;
  color: var(--ink);
}

.sr-book-detail__text p {
  margin: 0 0 1rem;
}

.sr-book-detail__note {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--ink-muted);
  margin: 0.85rem 0 0;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1100px) {
  .sr-library__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem 1.5rem;
  }
  .sr-library-book__stage {
    min-height: 280px;
  }
}

@media (max-width: 760px) {
  .sr-book-detail__grid {
    grid-template-columns: 1fr;
  }
  .sr-book-detail__visual {
    max-width: 26rem;
    width: 100%;
  }
  .sr-book-detail__cover {
    width: min(100%, 210px);
    max-height: 340px;
  }
}

@media (max-width: 580px) {
  .sr-library__grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
  .sr-library-book {
    border-radius: 8px;
  }
  .sr-library-book__stage {
    min-height: 240px;
    padding: 1.5rem 1rem 1.25rem;
  }
  .sr-library-book__cover {
    height: 190px;
  }
  .sr-library-book__body {
    padding: 1.25rem 1.15rem 1.25rem;
  }
  .sr-library-book h3 {
    font-size: 1.5rem;
  }
  .sr-library__particle {
    width: 14px;
    height: 14px;
    opacity: 0.16;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sr-library-book__cover,
  .sr-library__particle,
  .sr-library-book,
  .sr-library-book__link {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }
}