/* ---------- Books ---------- */
.book-hero{position:relative;background:var(--ember);color:var(--bone-2);overflow:hidden;isolation:isolate;padding:132px 0 80px}
.book-hero::before{content:"";position:absolute;inset:0;background:var(--grain);opacity:.22;mix-blend-mode:multiply;z-index:-1}
.book-hero::after{content:"";position:absolute;width:760px;height:760px;right:-180px;top:-160px;border-radius:50%;background:radial-gradient(circle,var(--ember-glow),transparent 65%);z-index:-1}
.bh-grid{display:grid;gap:40px;align-items:center}
@media (min-width:920px){.bh-grid{grid-template-columns:1.05fr .95fr}}
.bh-copy{display:grid;gap:18px;justify-items:start}
.bh-copy h1{font-size:clamp(2rem,1.3rem + 4vw,4.2rem);max-width:13ch;font-weight:800;letter-spacing:-.04em;line-height:.98}
.bh-copy .lede{color:rgba(255,248,240,.9)}
.bh-price{display:flex;flex-wrap:wrap;gap:16px;align-items:center;padding:14px 14px 14px 20px;border-radius:var(--r-lg)}
.bh-price b{display:block;font-family:var(--display);font-size:1.8rem;letter-spacing:-.03em}
.bh-price span{font-size:.9rem;color:rgba(255,248,240,.85)}
.bh-note{font-size:.9rem;color:rgba(255,248,240,.8)}
.stack{position:relative;height:clamp(300px,52vw,500px);perspective:1400px}
.stack{max-width:560px;width:100%;justify-self:center}
.stack img{position:absolute;width:clamp(150px,27vw,270px);border-radius:8px;box-shadow:0 40px 60px -30px rgba(26,20,16,.75),0 0 0 1px rgba(255,255,255,.1)}
.stack .s1{left:0;top:0;transform:rotateY(18deg) rotate(-6deg)}
.stack .s2{right:0;bottom:0;transform:rotateY(-14deg) rotate(5deg)}
@media (prefers-reduced-motion:no-preference){.stack .s1{animation:float1 7s ease-in-out infinite}.stack .s2{animation:float2 8s ease-in-out infinite}}
@keyframes float1{50%{transform:rotateY(14deg) rotate(-4deg) translateY(-10px)}}
@keyframes float2{50%{transform:rotateY(-10deg) rotate(3deg) translateY(10px)}}

.books-sec{background:var(--paper)}
.book-grid{display:grid;gap:22px}
@media (min-width:860px){.book-grid{grid-template-columns:1fr 1fr}}
.book{display:grid;gap:20px;padding:22px;border-radius:var(--r-xl);background:#fff;border:1px solid var(--line);align-content:start}
@media (min-width:520px){.book{grid-template-columns:200px 1fr}}
.flip{all:unset;cursor:pointer;perspective:1000px;justify-self:center;width:min(220px,70vw)}
.flip:focus-visible{outline:3px solid var(--marigold);outline-offset:4px;border-radius:8px}
.flip-in{position:relative;display:block;transform-style:preserve-3d;transition:transform .7s var(--ease)}
.flip[aria-pressed="true"] .flip-in{transform:rotateY(180deg)}
.flip img{border-radius:6px;box-shadow:0 26px 40px -24px rgba(26,20,16,.6);backface-visibility:hidden;-webkit-backface-visibility:hidden}
.flip .back{position:absolute;inset:0;height:100%;transform:rotateY(180deg)}
.book-info{display:grid;gap:10px;align-content:start}
.paper-tag{justify-self:start;padding:4px 11px;border-radius:var(--r-tag);background:rgba(217,68,15,.1);color:var(--ember-deep);font-size:.8rem;font-weight:700}
.book-info p{color:var(--muted)}
.inside{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.inside li{padding:6px 11px;border-radius:var(--r-tag);background:var(--bone);font-size:.84rem;font-weight:500}

.order{background:var(--ember);color:var(--bone-2);position:relative;overflow:hidden;isolation:isolate}
.order::before{content:"";position:absolute;inset:0;background:var(--grain);opacity:.22;mix-blend-mode:multiply;z-index:-1}
.order::after{content:"";position:absolute;width:700px;height:700px;left:-260px;bottom:-320px;border-radius:50%;background:var(--ember-deep);z-index:-1}
.order-grid{display:grid;gap:36px;align-items:start}
@media (min-width:960px){.order-grid{grid-template-columns:.85fr 1.15fr;gap:60px}}
.order-copy{display:grid;gap:18px}
.order-copy .lede{color:rgba(255,248,240,.88)}
.summary{border-radius:var(--r-lg);padding:18px 20px;display:grid;gap:10px}
.sum-row{display:flex;justify-content:space-between;gap:12px;font-size:.95rem;color:rgba(246,242,234,.85)}
.sum-row.total{padding-top:10px;border-top:1px solid rgba(255,255,255,.14);color:#fff}
.sum-row.total b{font-family:var(--display);font-size:1.4rem}
.sum-note{font-size:.84rem;color:rgba(246,242,234,.6)}
.order-form{padding:clamp(20px,3vw,32px);border-radius:var(--r-xl)}
.order-form .field input,.order-form .field textarea{border-color:rgba(255,255,255,.45)}
.order-form .seg span{border-color:rgba(255,255,255,.5)}
.order-form .btn[type=submit]{width:100%;min-height:54px}
.qty{display:flex;align-items:stretch;border-radius:12px;overflow:hidden;border:1.5px solid rgba(255,255,255,.45);background:#FFFCF7;max-width:180px}
.qty button{width:48px;border:0;background:transparent;color:var(--ink);font-size:1.3rem;cursor:pointer}
.qty button:hover{background:var(--bone)}
.qty input{border:0!important;border-radius:0!important;text-align:center;min-height:48px;box-shadow:none!important;-moz-appearance:textfield}
.qty input::-webkit-inner-spin-button{-webkit-appearance:none}
.form-done{display:none;text-align:center;gap:12px;padding:30px 10px;justify-items:center}
.order-form.sent .form-grid{display:none}
.order-form.sent .form-done{display:grid}
.form-done .mascot{width:110px;height:130px}

/* ---------- volumes: 3D book + contents page ---------- */
.vols{display:grid;gap:22px}
.vol{position:relative;display:grid;gap:26px;align-items:center;padding:clamp(20px,3vw,36px);border-radius:var(--r-xl);overflow:hidden;isolation:isolate;border:1px solid #fff}
.v-read{background:linear-gradient(140deg,#F2F2FF,#E4E4F8);box-shadow:inset 0 1px 0 #fff,0 30px 60px -40px rgba(46,42,126,.6)}
.v-write{background:linear-gradient(140deg,#FFF6EF,#FFE3D2);box-shadow:inset 0 1px 0 #fff,0 30px 60px -40px rgba(217,68,15,.6)}
.vol::before{content:"";position:absolute;width:420px;height:420px;left:-120px;top:-120px;border-radius:50%;z-index:-1;background:radial-gradient(circle,rgba(255,255,255,.9),transparent 65%)}
@media (min-width:860px){.vol{grid-template-columns:330px 1fr;gap:44px}.vol.v-write{grid-template-columns:1fr 330px}.v-write .vol-art{order:2}}
.vol-art{display:grid;justify-items:center;gap:14px;perspective:1300px}
.vol-hint{font-size:.8rem;font-weight:600;color:var(--muted)}
.book3d{all:unset;cursor:pointer;display:block;perspective:1300px;width:clamp(170px,46vw,230px);aspect-ratio:420/590;--t:26px}
.book3d:focus-visible{outline:3px solid var(--marigold);outline-offset:8px;border-radius:6px}
.b3-in{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d;transform:rotateY(-28deg) rotateX(6deg);transition:transform .9s var(--ease-o)}
.book3d:hover .b3-in{transform:rotateY(-14deg) rotateX(4deg) translateY(-6px)}
.book3d[aria-pressed="true"] .b3-in{transform:rotateY(152deg) rotateX(6deg)}
.b3-in>*{position:absolute;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.b3-front,.b3-back{inset:0;width:100%;height:100%;object-fit:cover;border-radius:3px 6px 6px 3px}
.b3-front{transform:translateZ(calc(var(--t) / 2));box-shadow:inset 4px 0 8px rgba(0,0,0,.25)}
.b3-back{transform:rotateY(180deg) translateZ(calc(var(--t) / 2));border-radius:6px 3px 3px 6px}
.b3-spine{left:0;top:0;width:var(--t);height:100%;transform-origin:left;transform:rotateY(-90deg) translateX(calc(var(--t) / -2));background:linear-gradient(90deg,#8c2a06,var(--ember-deep) 40%,var(--ember) 60%,#8c2a06);display:grid;place-items:center;overflow:hidden}
.b3-spine span{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--display);font-weight:700;font-size:.55rem;letter-spacing:.12em;color:#FFE6D6;white-space:nowrap}
.b3-pages{right:0;top:3px;width:var(--t);height:calc(100% - 6px);transform-origin:right;transform:rotateY(90deg) translateX(calc(var(--t) / 2));background:repeating-linear-gradient(90deg,#fffdf6 0 2px,#e9e2d4 2px 3px)}
.b3-in::after{content:"";position:absolute;left:8%;right:2%;bottom:-26px;height:22px;border-radius:50%;background:radial-gradient(ellipse,rgba(26,20,16,.35),transparent 70%);transform:translateZ(-40px) rotateX(90deg)}
@media (prefers-reduced-motion:no-preference){.vol:not(:hover) .book3d[aria-pressed="false"] .b3-in{animation:bookIdle 6s ease-in-out infinite}}
@keyframes bookIdle{50%{transform:rotateY(-22deg) rotateX(5deg) translateY(-8px)}}
.vol-page{position:relative;display:grid;gap:12px;align-content:start;padding:24px 22px 22px 44px;border-radius:18px;background:#FFFDF8;box-shadow:0 1px 0 #fff inset,0 18px 34px -26px rgba(26,20,16,.45);
  background-image:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,253,248,0) 120px)}
.vol-page::before{content:"";position:absolute;top:0;bottom:0;left:28px;width:1.5px;background:rgba(217,68,15,.35)}
.vol-page h3{font-size:clamp(1.3rem,1.1rem + .8vw,1.75rem)}
.vol-page>p{color:var(--muted);max-width:52ch}
.v-read .paper-tag{background:rgba(46,42,126,.1);color:var(--indigo)}
.toc{display:grid;gap:6px;margin-top:4px}
.toc-h{font-family:var(--display);font-weight:700;font-size:.85rem;color:var(--ember-deep)}
.v-read .toc-h{color:var(--indigo)}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.toc li{display:flex;align-items:baseline;gap:10px;padding:7px 0;font-size:.95rem;font-weight:500;border-bottom:1px solid rgba(26,20,16,.06)}
.toc li:last-child{border-bottom:0}
.toc li i{flex:1;border-bottom:2px dotted rgba(26,20,16,.22);transform:translateY(-4px)}
.toc li b{font-family:var(--display);font-size:.78rem;color:var(--ember-deep)}
.v-read .toc li b{color:var(--indigo)}
.vol-page .btn{justify-self:start;margin-top:6px}
@media (max-width:520px){.vol-page{padding:20px 16px 18px 36px}.vol-page::before{left:22px}.toc li{font-size:.9rem}}