:root {
        --paper: #EDE6D6;
        --ink: #1A1A1A;
        --accent: #D6482B;
        --secondary: #2B5FA8;
        --page-ratio: 0.773;
        --spread-ratio: 1.546;
        --reader-background: var(--ink);
        --reader-body-background: var(--ink);
        --reader-foreground: var(--paper);
        --reader-accent: var(--accent);
        --reader-muted: #B9B0A0;
        --reader-line: rgba(43, 95, 168, 0.72);
        --reader-page: var(--paper);
        --reader-stage-background: #111111;
        --reader-stage-shadow: 0.65rem 0.65rem 0 rgba(0, 0, 0, 0.42);
        --reader-page-shadow: 0.35rem 0.4rem 0 rgba(0, 0, 0, 0.34);
        --reader-control-hover: var(--accent);
        --reader-heading-font: Oswald, Impact, sans-serif;
        --reader-body-font: "Roboto Slab", Georgia, serif;
        --reader-heading-weight: 700;
        --reader-heading-spacing: -0.03em;
        --reader-heading-transform: uppercase;
      }

      * {
        box-sizing: border-box;
      }

      html,
      body {
        min-height: 100%;
        overflow-x: hidden;
      }

      body {
        margin: 0;
        color: var(--paper);
        background: var(--ink);
        font-family: "Roboto Slab", Georgia, serif;
      }

      button,
      a {
        color: inherit;
        font: inherit;
      }

      .alternate-reader {
        display: grid;
        grid-template-rows: auto 1fr auto;
        min-height: 100vh;
        padding: 1.5rem 1rem;
      }

      .reader-header,
      .reader-controls {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        width: min(100%, 773px);
        margin: 0 auto;
        font-family: Oswald, Impact, sans-serif;
        letter-spacing: 0.06em;
        text-transform: uppercase;
      }

      .reader-header {
        padding-bottom: 1rem;
        border-bottom: 0.2rem solid var(--secondary);
      }

      .reader-header a {
        color: var(--paper);
        text-decoration: none;
      }

      .reader-header a:hover,
      .reader-header a:focus-visible {
        color: var(--accent);
      }

      .reader-label,
      .reader-status {
        margin: 0;
        font-size: 13px;
        line-height: 1.4;
      }

      .reader-stage {
        display: grid;
        place-items: center;
        width: 100%;
        min-height: 0;
        padding: 2rem 0;
      }

      .page-deck {
        position: relative;
        width: min(92vw, 1546px);
        aspect-ratio: var(--spread-ratio);
        perspective: 1800px;
        background: var(--ink);
        box-shadow: 0 1rem 2.5rem rgb(0 0 0 / 45%);
      }

      .page-deck.is-cover {
        width: min(92vw, 773px);
        aspect-ratio: var(--page-ratio);
      }

      .page-deck::after {
        position: absolute;
        inset: 0 49.7%;
        z-index: 4;
        background: linear-gradient(90deg, rgb(0 0 0 / 24%), rgb(237 230 214 / 72%) 48%, rgb(0 0 0 / 20%));
        box-shadow: 0 0 1.2rem rgb(0 0 0 / 28%);
        content: "";
        pointer-events: none;
      }

      .page-deck.is-cover::after,
      .page-deck.is-mobile::after {
        display: none;
      }

      .page {
        position: absolute;
        top: 0;
        bottom: 0;
        overflow: hidden;
        visibility: hidden;
        opacity: 0;
        background: var(--paper);
        border: 0.15rem solid var(--ink);
        transform: rotateY(0deg);
        transform-origin: left center;
        transition: transform 680ms cubic-bezier(0.2, 0.75, 0.25, 1), opacity 120ms linear;
        backface-visibility: hidden;
        pointer-events: none;
      }

      .page img {
        display: block;
        width: 100%;
        height: 100%;
        object-fit: contain;
        object-position: center;
        background: var(--paper);
      }

      .page--cover {
        left: 25%;
        width: 50%;
      }

      .page-deck.is-cover .page--cover {
        left: 0;
        width: 100%;
      }

      .page[data-side="left"] {
        left: 0;
        width: 50%;
        transform-origin: right center;
        border-right-width: 0.08rem;
      }

      .page[data-side="right"] {
        left: 50%;
        width: 50%;
        transform-origin: left center;
        border-left-width: 0.08rem;
      }

      .page.is-current,
      .page.is-under,
      .page.is-reveal {
        visibility: visible;
        opacity: 1;
      }

      .page.is-current {
        z-index: 2;
        pointer-events: auto;
      }

      .page.is-under {
        z-index: 1;
      }

      .page.is-turning-forward {
        transform: rotateY(-180deg);
      }

      .page.is-turning-backward {
        transform: rotateY(180deg);
      }

      .page.is-turn-source {
        opacity: 0;
      }

      .turning-leaf {
        position: absolute;
        top: 0;
        bottom: 0;
        z-index: 9;
        width: 50%;
        opacity: 0;
        pointer-events: none;
        transform-style: preserve-3d;
        will-change: transform;
      }

      .turning-leaf--forward {
        left: 50%;
        transform-origin: left center;
      }

      .turning-leaf--backward {
        left: 0;
        transform-origin: right center;
      }

      .turning-leaf.is-active {
        opacity: 1;
      }

      .turning-leaf--forward.is-active {
        animation: turn-page-forward 820ms cubic-bezier(0.3, 0.03, 0.2, 1) both;
      }

      .turning-leaf--backward.is-active {
        animation: turn-page-backward 820ms cubic-bezier(0.3, 0.03, 0.2, 1) both;
      }

      .leaf-face {
        position: absolute;
        inset: 0;
        overflow: hidden;
        background: var(--paper);
        box-shadow: 0 0.8rem 2rem rgb(0 0 0 / 54%);
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
      }

      .leaf-face--front {
        transform: rotateY(0deg);
      }

      .leaf-face--back {
        transform: rotateY(180deg);
      }

      .leaf-face::after {
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, transparent 68%, rgb(255 255 255 / 12%) 88%, rgb(0 0 0 / 32%));
        content: "";
      }

      .turning-leaf--backward .leaf-face::after {
        background: linear-gradient(270deg, transparent 68%, rgb(255 255 255 / 12%) 88%, rgb(0 0 0 / 32%));
      }

      .leaf-face img {
        display: block;
        width: 100%;
        height: 100%;
        object-fit: contain;
        background: var(--paper);
      }

      .page-deck.is-turning::before {
        position: absolute;
        inset: 0 47.2%;
        z-index: 8;
        background: radial-gradient(ellipse at center, rgb(0 0 0 / 70%), transparent 70%);
        content: "";
        pointer-events: none;
        animation: gutter-shadow 820ms ease-in-out both;
      }

      .reader-controls {
        padding-top: 1rem;
        border-top: 0.2rem solid var(--secondary);
      }

      .reader-controls button {
        min-width: 8rem;
        padding: 0.7rem 1rem;
        color: var(--paper);
        background: var(--secondary);
        border: 0.15rem solid var(--paper);
        cursor: pointer;
        font-size: 13px;
        line-height: 1;
        letter-spacing: 0.08em;
        text-transform: uppercase;
      }

      .reader-controls button:hover:not(:disabled),
      .reader-controls button:focus-visible:not(:disabled) {
        color: var(--ink);
        background: var(--accent);
      }

      .reader-controls button:disabled {
        opacity: 0.35;
        cursor: default;
      }

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

      @keyframes turn-page-forward {
        0% { transform: rotateY(0deg) translateZ(1px); }
        48% { transform: rotateY(-88deg) translateZ(1.4rem); }
        100% { transform: rotateY(-180deg) translateZ(1px); }
      }

      @keyframes turn-page-backward {
        0% { transform: rotateY(0deg) translateZ(1px); }
        48% { transform: rotateY(88deg) translateZ(1.4rem); }
        100% { transform: rotateY(180deg) translateZ(1px); }
      }

      @keyframes gutter-shadow {
        0%, 100% { opacity: 0.2; transform: scaleX(0.35); }
        50% { opacity: 1; transform: scaleX(1); }
      }

      @media (max-width: 640px) {
        .alternate-reader {
          padding: 1rem 0.65rem;
        }

        .reader-stage {
          padding: 1rem 0;
          overflow: hidden;
        }

        .page-deck {
          width: min(92vw, 38rem);
          aspect-ratio: var(--page-ratio);
          flex: 0 0 auto;
        }

        .page-deck.is-cover,
        .page-deck.is-spread {
          width: min(92vw, 38rem);
        }

        .page-deck.is-mobile .page,
        .page-deck.is-mobile .page--cover,
        .page-deck.is-mobile .page[data-side="left"],
        .page-deck.is-mobile .page[data-side="right"] {
          left: 0;
          width: 100%;
        }

        .page-deck.is-mobile .turning-leaf {
          left: 0;
          width: 100%;
        }

        .reader-controls button {
          min-width: 0;
          padding-inline: 0.7rem;
        }
      }

      @media (prefers-reduced-motion: reduce) {
        .page {
          transition-duration: 1ms;
        }
      }