/* ==========================================================================
   Pagina delle librerie: scaffale, vetrina, griglia, carosello 3D, parete, elenco.
   La forma attiva è html[data-forma], il materiale dei ripiani html[data-ripiano].
   ========================================================================== */

body.pagina-librerie { position: relative; min-height: 100vh; }
body.pagina-librerie > header, body.pagina-librerie > main, body.pagina-librerie > footer { position: relative; z-index: 1; }

/* ---- testata ------------------------------------------------------------- */
.testata {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 14px 22px; flex-wrap: wrap;
  padding: 12px max(18px, env(safe-area-inset-right)) 12px max(18px, env(safe-area-inset-left));
  padding-top: calc(12px + env(safe-area-inset-top));
  border-left: 0; border-right: 0; border-top: 0;
  border-radius: 0 0 var(--raggio-ui) var(--raggio-ui);
}
.marchio { display: flex; align-items: center; gap: 14px; min-width: 0; flex: 1 1 260px; }
.logo { height: 48px; width: auto; max-width: 140px; object-fit: contain; }
.marchio-testi { display: flex; flex-direction: column; min-width: 0; }
.azienda { font-size: .72rem; letter-spacing: .22em; text-transform: uppercase; color: var(--testo-sec); }
.marchio h1 { font-size: clamp(1.25rem, 3.4vw, 1.75rem); }
.ricerca { flex: 1 1 240px; max-width: 420px; }
.strumenti { display: flex; align-items: center; gap: 10px; margin-left: auto; flex-wrap: wrap; }
html[data-rete="offline"] #stato-rete { background: color-mix(in srgb, #ffb020 26%, transparent); color: #ffd27a; }
html[data-rete="online"] #stato-rete { background: color-mix(in srgb, #36e08a 20%, transparent); color: #7bf0b2; }

/* ---- contenuto ------------------------------------------------------------ */
.contenitore {
  max-width: 1500px; margin: 0 auto;
  padding: 22px max(18px, env(safe-area-inset-right)) 70px max(18px, env(safe-area-inset-left));
}
.filtri { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 26px; }
.vuoto { text-align: center; color: var(--testo-sec); padding: 60px 10px; }

.libreria { margin: 0 0 30px; --dc: min(var(--dim-cop), 43vw); }
.libreria-testa { display: flex; align-items: baseline; gap: 16px; margin: 0 0 8px; padding: 0 6px; }
.libreria-testa h2 { font-size: clamp(1.3rem, 3vw, 1.9rem); }
.libreria-testa .conteggio { color: var(--testo-sec); font-size: .85rem; }
.libreria-testa::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--bordo-ui), transparent); align-self: center; }

/* ---- singola voce (copertina + didascalia) -------------------------------- */
.voce { position: relative; z-index: 1; width: var(--dc); padding-bottom: 46px; }
.copertina {
  display: block; position: relative; width: 100%;
  aspect-ratio: var(--ratio, 0.707);
  border-radius: var(--raggio-cop);
  text-decoration: none; color: inherit;
  transform: perspective(800px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform .25s ease-out, box-shadow .25s;
  transform-style: preserve-3d;
  will-change: transform;
  outline-offset: 5px;
}
.copertina .libro3d { position: absolute; inset: 0; border-radius: inherit; overflow: hidden; background: color-mix(in srgb, var(--testo) 8%, var(--sfondo2)); box-shadow: 0 14px 28px rgb(0 0 0 / calc(var(--ombra-cop) * .55)), 0 3px 8px rgb(0 0 0 / calc(var(--ombra-cop) * .4)); }
.copertina img { display: block; width: 100%; height: 100%; object-fit: cover; }
.copertina .lucido {
  position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .25s;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 30%), rgb(255 255 255 / .38), transparent 55%);
  mix-blend-mode: soft-light;
}
.copertina .costola { position: absolute; inset: 0 auto 0 0; width: 5%; background: linear-gradient(90deg, rgb(0 0 0 / .32), rgb(255 255 255 / .1) 55%, transparent); pointer-events: none; }
.copertina:hover .lucido, .copertina:focus-visible .lucido { opacity: 1; }
.copertina:hover { transform: perspective(800px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-6px) scale(1.025); }
html[data-leggera="1"] .copertina { will-change: auto; transform: none !important; }
html[data-leggera="1"] .copertina:hover { transform: translateY(-4px) !important; }

html[data-neon="on"][data-nc="1"] .copertina .libro3d {
  box-shadow:
    0 0 0 var(--neon-spessore) var(--neon-col),
    0 0 var(--neon-alone) var(--neon-col),
    0 0 calc(var(--neon-alone) * 2) color-mix(in srgb, var(--neon-col) 40%, transparent),
    0 12px 24px rgb(0 0 0 / calc(var(--ombra-cop) * .5));
}
html[data-neon="on"][data-nc="1"] .copertina:hover .libro3d {
  box-shadow:
    0 0 0 var(--neon-spessore) var(--accento),
    0 0 var(--neon-alone) var(--neon-col),
    0 0 calc(var(--neon-alone) * 2.2) var(--neon-col2),
    0 12px 24px rgb(0 0 0 / calc(var(--ombra-cop) * .5));
}
html[data-riflesso="1"][data-leggera="0"][data-forma="scaffale"] .copertina .libro3d,
html[data-riflesso="1"][data-leggera="0"][data-forma="vetrina"] .copertina .libro3d,
html[data-riflesso="1"][data-leggera="0"][data-forma="carosello"] .copertina .libro3d { -webkit-box-reflect: below 3px linear-gradient(to bottom, rgb(255 255 255 / .28), transparent 30%); }

/* distintivi sulla copertina */
.copertina .segni { position: absolute; top: 8px; right: 8px; display: flex; flex-direction: column; gap: 6px; align-items: flex-end; z-index: 2; }
.copertina .segni .badge { background: rgb(0 0 0 / .6); color: #fff; -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
.copertina .segni .badge.ok { color: #7bf0b2; }

/* didascalia */
.didascalia { position: absolute; left: 0; right: 0; bottom: 0; height: 46px; display: flex; flex-direction: column; justify-content: center; gap: 1px; padding: 0 4px; pointer-events: none; min-width: 0; }
.didascalia h3 { font-size: .86rem; font-weight: 600; line-height: 1.15; letter-spacing: .01em; text-transform: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: var(--font-testo); color: var(--testo); }
.didascalia .info { font-size: .7rem; color: var(--testo-sec); display: flex; gap: 8px; align-items: center; white-space: nowrap; overflow: hidden; min-width: 0; }
.didascalia .info > span:first-child { flex: none; }
.didascalia .azione-offline { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
html[data-titoli="mai"] .didascalia { display: none; }
html[data-titoli="hover"] .didascalia { opacity: 0; transition: opacity .2s; }
html[data-titoli="hover"] .voce:hover .didascalia, html[data-titoli="hover"] .voce:focus-within .didascalia { opacity: 1; }
.didascalia .azione { pointer-events: auto; }
.btn-offline { all: unset; cursor: pointer; font-size: .7rem; color: var(--accento); display: inline-flex; gap: 4px; align-items: center; padding: 1px 0; }
.btn-offline:hover { text-decoration: underline; }
.btn-offline:focus-visible { outline: 2px solid var(--accento); outline-offset: 2px; border-radius: 4px; }
.btn-offline svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.barra-offline { height: 3px; border-radius: 99px; background: color-mix(in srgb, var(--testo) 14%, transparent); overflow: hidden; margin-top: 3px; width: 100%; }
.barra-offline i { display: block; height: 100%; width: var(--p, 0%); background: var(--accento); transition: width .3s; }

/* ---- corpo della libreria -------------------------------------------------- */
.scaffale-corpo { position: relative; display: flex; flex-wrap: wrap; column-gap: 30px; row-gap: 0; padding: 26px 22px 2px; }
.ripiano { display: none; }

/* ---- Scaffale e vetrina: ripiani a tutta larghezza ------------------------- */
html[data-forma="scaffale"] .ripiano, html[data-forma="vetrina"] .ripiano {
  display: block; flex: 0 0 100%; height: 46px; margin: -46px 0 34px; position: relative; z-index: 0;
  margin-left: -22px; margin-right: -22px; width: calc(100% + 44px); flex-basis: calc(100% + 44px);
}
html[data-forma="vetrina"] .scaffale-corpo {
  padding: 30px 30px 2px; overflow: hidden;
  border-radius: calc(var(--raggio-ui) + 8px);
  background: linear-gradient(155deg, color-mix(in srgb, var(--testo) 10%, transparent), color-mix(in srgb, var(--testo) 2%, transparent) 46%, color-mix(in srgb, var(--testo) 7%, transparent));
  border: 1px solid color-mix(in srgb, var(--testo) 24%, transparent);
  box-shadow: inset 0 0 0 7px color-mix(in srgb, var(--testo) 4%, transparent), inset 0 1px 0 rgb(255 255 255 / .35), inset 0 0 70px color-mix(in srgb, var(--testo) 6%, transparent), 0 30px 60px rgb(0 0 0 / .28);
}
html[data-forma="scaffale"] .scaffale-corpo, html[data-forma="vetrina"] .scaffale-corpo { align-items: flex-end; }
html[data-forma="vetrina"] .ripiano { margin-left: -30px; margin-right: -30px; width: calc(100% + 60px); flex-basis: calc(100% + 60px); }
html[data-forma="vetrina"] .scaffale-corpo::after {
  content: ""; position: absolute; top: -30%; bottom: -30%; left: -40%; width: 32%; pointer-events: none;
  transform: rotate(16deg);
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / .13), transparent);
  animation: riflesso-vetro 11s linear infinite;
}
@keyframes riflesso-vetro { from { left: -40%; } to { left: 130%; } }
html[data-leggera="1"] .scaffale-corpo::after { display: none; }

/* materiali dei ripiani */
html[data-ripiano="neon"] .ripiano { background: linear-gradient(180deg, color-mix(in srgb, var(--accento) 14%, transparent), transparent 85%); }
html[data-ripiano="neon"] .ripiano::before {
  content: ""; position: absolute; left: 3%; right: 3%; top: 0; height: max(3px, var(--neon-spessore)); border-radius: 99px;
  background: linear-gradient(90deg, transparent, var(--accento) 10%, var(--accento2) 90%, transparent);
}
html[data-neon="on"][data-nr="1"][data-ripiano="neon"] .ripiano::before {
  box-shadow: 0 0 calc(var(--neon-alone) * .45) var(--neon-col), 0 0 var(--neon-alone) var(--neon-col2), 0 8px calc(var(--neon-alone) * 1.2) var(--neon-col);
}
html[data-ripiano="legno-scuro"] .ripiano {
  background:
    linear-gradient(180deg, rgb(255 255 255 / .2) 0 3px, transparent 3px),
    repeating-linear-gradient(90deg, rgb(0 0 0 / .1) 0 2px, transparent 2px 9px),
    repeating-linear-gradient(93deg, rgb(255 255 255 / .04) 0 1px, transparent 1px 23px),
    linear-gradient(180deg, #6b4428, #3f2616);
  box-shadow: 0 14px 22px rgb(0 0 0 / .5), inset 0 -3px 0 rgb(0 0 0 / .3);
  border-radius: 3px;
}
html[data-ripiano="legno-chiaro"] .ripiano {
  background:
    linear-gradient(180deg, rgb(255 255 255 / .45) 0 3px, transparent 3px),
    repeating-linear-gradient(90deg, rgb(120 70 20 / .12) 0 2px, transparent 2px 10px),
    linear-gradient(180deg, #dcb57e, #b98a52);
  box-shadow: 0 14px 22px rgb(0 0 0 / .35), inset 0 -3px 0 rgb(90 50 10 / .25);
  border-radius: 3px;
}
html[data-ripiano="vetro"] .ripiano {
  background: linear-gradient(180deg, rgb(255 255 255 / .62), rgb(190 225 255 / .2) 38%, rgb(255 255 255 / .08));
  border: 1px solid rgb(255 255 255 / .5); border-bottom-color: rgb(255 255 255 / .15);
  box-shadow: 0 12px 24px rgb(0 20 50 / .28), inset 0 1px 0 rgb(255 255 255 / .85);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  border-radius: 2px;
}
html[data-ripiano="metallo"] .ripiano {
  background:
    linear-gradient(180deg, rgb(255 255 255 / .55) 0 2px, transparent 2px),
    repeating-linear-gradient(90deg, rgb(0 0 0 / .12) 0 1px, rgb(255 255 255 / .06) 1px 3px),
    linear-gradient(180deg, #a7adb7, #6c727c);
  box-shadow: 0 12px 20px rgb(0 0 0 / .45);
  border-radius: 2px;
}
html[data-ripiano="nessuno"] .ripiano { height: 0 !important; margin-top: 0 !important; margin-bottom: 14px !important; }

/* ---- Griglia moderna ------------------------------------------------------- */
html[data-forma="griglia"] .scaffale-corpo { display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--dc), 1fr)); gap: 30px 26px; padding: 18px 6px 0; justify-items: center; }
html[data-forma="griglia"] .voce { padding-bottom: 46px; }
html[data-forma="griglia"] .didascalia { height: 46px; padding-top: 6px; justify-content: flex-start; }

/* ---- Carosello 3D ---------------------------------------------------------- */
html[data-forma="carosello"] .scaffale-corpo {
  flex-wrap: nowrap; column-gap: 0; overflow-x: auto; perspective: 1200px; perspective-origin: 50% 40%;
  padding: 38px 0 40px; scroll-snap-type: x mandatory; scrollbar-width: none; overscroll-behavior-x: contain;
}
html[data-forma="carosello"] .scaffale-corpo::-webkit-scrollbar { display: none; }
html[data-forma="carosello"] .scaffale-corpo::before, html[data-forma="carosello"] .scaffale-corpo::after { content: ""; flex: 0 0 calc(50% - var(--dc) * .6); }
html[data-forma="carosello"] .voce { flex: 0 0 calc(var(--dc) * 1.2); width: calc(var(--dc) * 1.2); padding: 0 calc(var(--dc) * .1) 54px; scroll-snap-align: center; transform-style: preserve-3d; transition: transform .12s linear, opacity .12s linear; }
html[data-forma="carosello"] .didascalia { padding: 6px calc(var(--dc) * .1) 0; height: 54px; justify-content: flex-start; text-align: center; }
html[data-forma="carosello"] .didascalia .info { justify-content: center; }
html[data-forma="carosello"] .scaffale-corpo { mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }

/* ---- Parete con quadri ----------------------------------------------------- */
html[data-forma="parete"] .scaffale-corpo { justify-content: center; column-gap: 54px; row-gap: 20px; padding: 40px 18px 10px; }
html[data-forma="parete"] .voce { padding-bottom: 54px; }
html[data-forma="parete"] .voce::before {
  content: ""; position: absolute; left: -40%; right: -40%; top: -34px; height: 130%; z-index: -1; pointer-events: none;
  background: radial-gradient(ellipse 50% 60% at 50% 0%, color-mix(in srgb, var(--accento) 22%, transparent), transparent 70%);
}
html[data-forma="parete"] .copertina { padding: 0; }
html[data-forma="parete"] .copertina::before {
  content: ""; position: absolute; inset: -9px; border-radius: calc(var(--raggio-cop) + 3px); z-index: -1;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accento) 80%, #fff), color-mix(in srgb, var(--accento2) 80%, #000));
  box-shadow: 0 16px 34px rgb(0 0 0 / calc(var(--ombra-cop) * .7)), inset 0 0 0 1px rgb(255 255 255 / .4);
}
html[data-forma="parete"] .copertina::after { content: ""; position: absolute; inset: -3px; border-radius: calc(var(--raggio-cop) + 1px); background: var(--sfondo1); z-index: -1; }
html[data-forma="parete"] .voce:nth-child(3n+1) { transform: rotate(-1.2deg); }
html[data-forma="parete"] .voce:nth-child(3n+2) { transform: translateY(14px); }
html[data-forma="parete"] .voce:nth-child(3n) { transform: rotate(1deg); }
html[data-forma="parete"] .didascalia { height: 54px; justify-content: flex-start; padding-top: 14px; text-align: center; }
html[data-forma="parete"] .didascalia .info { justify-content: center; }

/* ---- Elenco compatto ------------------------------------------------------- */
html[data-forma="lista"] .scaffale-corpo { display: flex; flex-direction: column; gap: 10px; padding: 12px 0 0; }
html[data-forma="lista"] .voce { width: 100%; padding: 10px 14px; display: grid; grid-template-columns: 56px 1fr; gap: 6px 16px; align-items: center; border-radius: var(--raggio-ui); background: color-mix(in srgb, var(--testo) 6%, transparent); border: 1px solid var(--bordo-ui); transition: background .15s, border-color .15s; }
html[data-forma="lista"] .voce:hover { background: color-mix(in srgb, var(--accento) 12%, transparent); border-color: color-mix(in srgb, var(--accento) 55%, transparent); }
html[data-forma="lista"] .copertina { width: 56px; transform: none !important; }
html[data-forma="lista"] .copertina .libro3d { box-shadow: 0 4px 10px rgb(0 0 0 / .4); }
html[data-forma="lista"] .didascalia { position: static; height: auto; pointer-events: auto; padding: 0; }
html[data-forma="lista"] .didascalia h3 { font-size: 1rem; white-space: normal; }
html[data-forma="lista"] .copertina .segni { display: none; }

/* ---- stati vari -------------------------------------------------------------- */
.scheletro { width: var(--dc); aspect-ratio: .707; border-radius: var(--raggio-cop); background: linear-gradient(100deg, color-mix(in srgb, var(--testo) 6%, transparent) 30%, color-mix(in srgb, var(--testo) 14%, transparent) 50%, color-mix(in srgb, var(--testo) 6%, transparent) 70%); background-size: 300% 100%; animation: scheletro 1.4s linear infinite; }
@keyframes scheletro { from { background-position: 100% 0; } to { background-position: -100% 0; } }

.piede { text-align: center; color: var(--testo-sec); font-size: .78rem; padding: 0 16px calc(24px + env(safe-area-inset-bottom)); }

.finestra-guida { position: fixed; inset: 0; z-index: 350; display: grid; place-items: center; background: rgb(0 0 0 / .55); padding: 18px; }
.finestra-corpo { max-width: 420px; padding: 22px 22px 20px; border-radius: calc(var(--raggio-ui) + 4px); display: flex; flex-direction: column; gap: 14px; align-items: flex-start; background: var(--pannello-solido); }
.finestra-corpo p { margin: 0; color: var(--testo-sec); }

@media (max-width: 620px) {
  .testata { gap: 10px; }
  .ricerca { order: 3; flex-basis: 100%; max-width: none; }
  .strumenti { margin-left: 0; }
  html[data-forma="vetrina"] .scaffale-corpo { padding-left: 18px; padding-right: 18px; }
  .scaffale-corpo { column-gap: 18px; }
  html[data-forma="parete"] .scaffale-corpo { column-gap: 30px; }
  .btn .testo-btn { display: none; }
}