/* Unveiling Medusa · section 3: the Medusa book, announced as "coming soon".
   The cover is a real 3D book: front, back, spine and the page block on three edges, built from
   CSS faces. js/medusa-book.js turns it with the mouse and sways it in a slow circle when idle. */
.medusa-book {
  --mono: var(--_font-default);
  position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(32px, 6vw, 110px); align-items: center;
  max-width: 1280px; margin: 0 auto; padding: clamp(60px, 7vw, 110px) 3.2rem; color: #e0e5ef; overflow-x: clip;
}
/* Ripples that pulse out from behind the book, all the time. */
.medusa-book__stage { position: relative; display: grid; place-items: center; }
.medusa-book__ring { position: absolute; left: 50%; top: 50%; width: clamp(360px, 40vw, 560px); aspect-ratio: 1; border-radius: 50%; border: 1px solid #9a86ff; opacity: 0; transform: translate(-50%, -50%) scale(.45); animation: mbook-ripple 9s cubic-bezier(.2, .6, .3, 1) infinite; pointer-events: none; }
.medusa-book__ring:nth-of-type(2) { animation-delay: -3s; }
.medusa-book__ring:nth-of-type(3) { animation-delay: -6s; }
@keyframes mbook-ripple { 0% { opacity: 0; transform: translate(-50%, -50%) scale(.45); } 15% { opacity: .32; } 100% { opacity: 0; transform: translate(-50%, -50%) scale(1.5); } }
.medusa-book__eyebrow { margin: 0 0 16px; font: 400 10px/1.3 var(--mono); letter-spacing: .18em; text-transform: uppercase; color: #a79ac8; }
.medusa-book h2 { margin: 0 0 22px; font: 400 clamp(34px, 3.6vw, 62px)/1.02 var(--_font-default); letter-spacing: -.045em; color: #f1f3f9; }
.medusa-book__text p:not([class]) { max-width: 52ch; margin: 0 0 28px; font: 300 clamp(15px, 1.15vw, 18px)/1.6 var(--_font-default); color: #afb9cc; }
/* "Notify me": the address on an underline that runs up to the button. */
.medusa-book__form { position: relative; max-width: 440px; }
.medusa-book__field { display: flex; align-items: center; gap: 18px; }
.medusa-book__field input { flex: 1; min-width: 0; margin: 0; padding: 12px 2px; border: 0; border-bottom: 1px solid #c9b9ff55; border-radius: 0; background: transparent; box-shadow: none; transition: border-color .3s; color: #e9ecf6; font: 300 14px/1.2 var(--_font-default); outline: none; }
.medusa-book__field input::placeholder { color: #8c93ad; opacity: 1; }
.medusa-book__field input:focus { border-bottom-color: #b9a8ff; }
.medusa-book__field button { display: inline-flex; align-items: center; gap: 8px; flex: none; margin: 0; padding: 11px 18px; border: 0; border-radius: 999px; background: #7657f0; color: #fff; font: 400 11px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; cursor: pointer; box-shadow: 0 0 18px #7657f066; transition: filter .25s; }
.medusa-book__field button svg { transition: transform .3s; }
.medusa-book__field button:hover { filter: brightness(1.15); }
.medusa-book__field button:hover svg { transform: translateX(3px); }
.medusa-book__field button:focus-visible { outline: 2px solid #e0d8ff; outline-offset: 2px; }
.medusa-book__status { min-height: 1.4em; margin: 10px 0 0; font: 300 13px/1.4 var(--_font-default); color: #9be6c6; }
.medusa-book__status:empty { margin-top: 0; }
.medusa-book__form.is-error .medusa-book__status { color: #ff9eb4; }
.medusa-book__form.is-sending button { opacity: .7; cursor: progress; }
.medusa-book__form.is-done .medusa-book__field input { border-bottom-color: #6fd3a6aa; }
.medusa-book__form.is-error .medusa-book__field input { border-bottom-color: #ff7a9a; }
.medusa-book__form.is-error .medusa-book__field { animation: mbook-shake .4s; }
@keyframes mbook-shake { 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }
.medusa-book__trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
@media (max-width: 767px) {
  .medusa-book { grid-template-columns: minmax(0, 1fr); padding-inline: 2.2rem; justify-items: start; }
  .medusa-book__stage { justify-self: center; margin-bottom: 24px; }
  .mbook { --w: min(62vw, 240px); }
}
@media (max-width: 420px) {
  .medusa-book__field { flex-direction: column; align-items: stretch; }
  .medusa-book__field button { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  .medusa-book__ring, .medusa-book__form.is-error .medusa-book__field { animation: none; }
  .medusa-book__ring:first-of-type { opacity: .18; transform: translate(-50%, -50%) scale(.9); }
}
.mbook {
  --w: clamp(200px, 22vw, 300px); --h: calc(var(--w) * 1.5); --t: calc(var(--w) * .24); /* width, height, thickness */
  --rx: 0deg; --ry: 24deg; --lift: 0px;
  position: relative; width: var(--w); height: var(--h); margin: 0 calc(var(--t) * .6); perspective: 1400px; cursor: grab;
}
.mbook__book {
  position: absolute; inset: 0; transform-style: preserve-3d;
  transform: translateZ(var(--lift)) rotateX(var(--rx)) rotateY(var(--ry));
}
.mbook__face { position: absolute; backface-visibility: hidden; }
/* Front board: the cover picture, a fold line near the spine and a light that follows the turn. */
.mbook__front { inset: 0; transform: translateZ(calc(var(--t) / 2)); border-radius: 2px 6px 6px 2px; overflow: hidden; background: #0b0d1c; }
.mbook__front img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.mbook__front::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, #00000080 0, #0000002e 2.4%, #ffffff26 3.6%, #00000014 5.2%, transparent 8%),
    linear-gradient(calc(100deg + var(--ry) * 2), transparent 30%, #ffffff1c 48%, transparent 64%);
}
.mbook__back { inset: 0; transform: rotateY(180deg) translateZ(calc(var(--t) / 2)); border-radius: 6px 2px 2px 6px; background: radial-gradient(ellipse at 50% 35%, #2a1f66 0, #120f2c 60%, #090b18 100%); box-shadow: inset 0 0 0 1px #c9b9ff1f; }
/* Spine: the same board, with the title running down it. */
.mbook__spine {
  left: 0; top: 0; width: var(--t); height: 100%; transform: rotateY(-90deg) translateZ(calc(var(--t) / 2));
  display: grid; place-items: center; border-radius: 3px;
  background: linear-gradient(90deg, #07081a, #241a57 30%, #2f2470 50%, #241a57 70%, #07081a);
}
.mbook__spine span { writing-mode: vertical-rl; font: 400 calc(var(--t) * .42)/1 var(--_font-default); letter-spacing: .32em; text-transform: uppercase; color: #e6e9f4; text-shadow: 0 0 10px #9a6bff99; }
.mbook__spine::before { content: ''; position: absolute; left: 50%; bottom: 7%; width: calc(var(--t) * .28); aspect-ratio: 1 / 1.5; transform: translateX(-50%); background: linear-gradient(160deg, #e6d6ff, #9a6bff 45%, #4a24b8); clip-path: polygon(50% 0, 100% 30%, 50% 100%, 0 30%); filter: drop-shadow(0 0 6px #9a6bff); }
/* Page block, set a little inside the boards on the three open edges. */
.mbook__pages { background: repeating-linear-gradient(90deg, #f1ead9 0 1px, #d9d0bc 1px 2px, #ebe3cf 2px 3px); }
.mbook__pages--right { top: 4px; left: calc(var(--w) - var(--t) - 3px); width: var(--t); height: calc(100% - 8px); transform: rotateY(90deg) translateZ(calc(var(--t) / 2)); box-shadow: inset 0 0 12px #0000004d; }
.mbook__pages--top, .mbook__pages--bottom { left: 0; width: calc(var(--w) - 4px); height: var(--t); background: repeating-linear-gradient(0deg, #f1ead9 0 1px, #d9d0bc 1px 2px, #ebe3cf 2px 3px); box-shadow: inset 0 0 12px #0000004d; }
.mbook__pages--top { top: 0; transform: rotateX(90deg) translateZ(calc(var(--t) / 2 - 3px)); }
.mbook__pages--bottom { top: calc(100% - var(--t)); transform: rotateX(-90deg) translateZ(calc(var(--t) / 2 - 3px)); }
/* A soft shadow on the "floor", which shifts against the turn. */
.mbook__shadow { position: absolute; left: 8%; right: 8%; bottom: -9%; height: 9%; border-radius: 50%; background: radial-gradient(ellipse, #000000b3, transparent 70%); filter: blur(8px); transform: translateX(var(--shx, 0px)) scale(var(--shs, 1)); pointer-events: none; }
.mbook::after { content: ''; position: absolute; inset: -12%; z-index: -1; border-radius: 50%; background: radial-gradient(circle, #7657f040, transparent 65%); pointer-events: none; }
@media (prefers-reduced-motion: reduce) { .mbook { cursor: default; } }
.medusa-book__text p:not([class]) { max-width: 52ch; margin: 0 0 28px; font: 300 clamp(15px, 1.15vw, 18px)/1.6 var(--_font-default); color: #afb9cc; }