:root {
    --bg: #060607;
    --panel: #0d0d0f;
    --text: #f4f1e8;
    --muted: rgba(244, 241, 232, 0.62);
    --faint: rgba(244, 241, 232, 0.12);
    --gold: #c9a05b;
    --book-header-offset: 128px;
    --font-ui: "Inter", sans-serif;
    --font-display: "Playfair Display", Georgia, serif;
}

* {
    box-sizing: border-box;
}

body {
    background:
        radial-gradient(circle at 70% 18%, rgba(201, 160, 91, 0.12), transparent 34rem),
        radial-gradient(circle at 18% 82%, rgba(54, 69, 92, 0.22), transparent 32rem),
        linear-gradient(180deg, #0a0a0b, var(--bg));
    color: var(--text);
    font-family: var(--font-ui);
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    width: 100%;
}

body::before {
    background-image:
        linear-gradient(rgba(244, 241, 232, 0.018) 1px, transparent 1px),
        linear-gradient(90deg, rgba(244, 241, 232, 0.014) 1px, transparent 1px);
    background-size: 82px 82px;
    content: "";
    inset: 0;
    mask-image: linear-gradient(180deg, transparent, #000 12%, #000 74%, transparent);
    opacity: 0.32;
    pointer-events: none;
    position: fixed;
    -webkit-mask-image: linear-gradient(180deg, transparent, #000 12%, #000 74%, transparent);
}

a {
    color: inherit;
    text-decoration: none;
}

.book-detail-page {
    margin: 0 auto;
    max-width: 1560px;
    min-height: 100vh;
    overflow-x: hidden;
    padding: var(--book-header-offset) clamp(1.25rem, 5vw, 5rem) 4rem;
    position: relative;
    width: 100%;
    z-index: 1;
}

.book-detail-hero {
    align-items: center;
    display: grid;
    gap: clamp(2.5rem, 6vw, 6.25rem);
    grid-template-columns: minmax(18rem, 0.68fr) minmax(30rem, 0.92fr);
    justify-content: center;
    min-height: calc(100vh - var(--book-header-offset) - 4rem);
}

.book-detail-cover {
    aspect-ratio: 9 / 16;
    background: var(--panel);
    border: 1px solid var(--faint);
    box-shadow:
        0 46px 100px rgba(0, 0, 0, 0.54),
        0 0 0 1px rgba(255, 255, 255, 0.025);
    margin: 0;
    overflow: hidden;
    position: relative;
    width: min(100%, 380px);
}

.book-detail-cover::after {
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.08), transparent 18%, transparent 82%, rgba(0, 0, 0, 0.22)),
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 20%, rgba(0, 0, 0, 0.26));
    content: "";
    inset: 0;
    pointer-events: none;
    position: absolute;
}

.book-detail-cover img {
    display: block;
    height: 100%;
    object-fit: cover;
    width: 100%;
}

.book-detail-copy {
    max-width: 100%;
    min-width: 0;
    width: 100%;
}

.book-detail-kicker {
    color: var(--gold);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    margin: 0 0 1.1rem;
    text-transform: uppercase;
}

.book-detail-copy h1,
.book-detail-empty h1 {
    font-family: var(--font-display);
    font-size: clamp(3.15rem, 5.6vw, 6.15rem);
    font-weight: 400;
    letter-spacing: 0;
    line-height: 0.88;
    margin: 0 0 1.45rem;
    max-width: 760px;
}

.book-detail-description,
.book-detail-empty p {
    color: var(--muted);
    font-size: clamp(1rem, 1.15vw, 1.12rem);
    line-height: 1.7;
    margin: 0 0 1.75rem;
    max-width: 680px;
}

.book-detail-meta {
    border-bottom: 1px solid var(--faint);
    border-top: 1px solid var(--faint);
    display: grid;
    gap: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0 0 1.6rem;
    max-width: 680px;
}

.book-detail-meta div {
    border-bottom: 1px solid var(--faint);
    min-width: 0;
    padding: 0.9rem 1rem 0.9rem 0;
}

.book-detail-meta div:nth-last-child(-n + 2) {
    border-bottom: 0;
}

.book-detail-meta dt {
    color: rgba(244, 241, 232, 0.38);
    font-size: 0.66rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    margin-bottom: 0.35rem;
    text-transform: uppercase;
}

.book-detail-meta dd {
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 700;
    margin: 0;
}

.book-detail-meta a {
    color: var(--gold);
}

.book-detail-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.book-detail-primary,
.book-detail-secondary {
    align-items: center;
    border-radius: 999px;
    display: inline-flex;
    font: 800 0.86rem/1 var(--font-ui);
    gap: 0.55rem;
    min-height: 44px;
    padding: 0 1.1rem;
    transition: border-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.book-detail-primary {
    background: var(--text);
    border: 1px solid var(--text);
    color: #080809;
    cursor: pointer;
}

.book-detail-secondary {
    border: 1px solid var(--faint);
    color: var(--text);
}

.book-detail-primary:hover,
.book-detail-primary:focus-visible,
.book-detail-secondary:hover,
.book-detail-secondary:focus-visible {
    border-color: var(--gold);
    transform: translateY(-2px);
}

.book-detail-primary svg {
    height: 17px;
    width: 17px;
}

.book-detail-empty {
    max-width: 720px;
}

@media (min-width: 1600px) {
    .book-detail-page {
        max-width: 1680px;
    }

    .book-detail-cover {
        width: min(100%, 430px);
    }
}

@media (max-width: 980px) {
    :root {
        --book-header-offset: 104px;
    }

    .book-detail-hero {
        gap: clamp(2rem, 5vw, 3rem);
        grid-template-columns: minmax(13rem, 0.55fr) minmax(0, 1fr);
    }

    .book-detail-cover {
        width: min(100%, 300px);
    }
}

@media (max-width: 720px) {
    :root {
        --book-header-offset: 94px;
    }

    .book-detail-page {
        padding: var(--book-header-offset) 1rem 3rem;
    }

    .book-detail-copy,
    .book-detail-description,
    .book-detail-meta {
        max-width: calc(100vw - 2rem);
    }

    .book-detail-hero {
        align-items: start;
        gap: 1.55rem;
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .book-detail-cover {
        justify-self: start;
        max-width: 180px;
    }

    .book-detail-kicker {
        margin-bottom: 0.8rem;
    }

    .book-detail-copy h1,
    .book-detail-empty h1 {
        font-size: clamp(2.25rem, 12vw, 3.25rem);
        line-height: 0.94;
        margin-bottom: 1rem;
        max-width: 100%;
        overflow-wrap: break-word;
        width: 100%;
    }

    .book-detail-description,
    .book-detail-empty p {
        font-size: 0.98rem;
        line-height: 1.62;
        margin-bottom: 1.35rem;
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .book-detail-meta {
        grid-template-columns: 1fr;
        margin-bottom: 1.35rem;
    }

    .book-detail-meta div:nth-last-child(-n + 2) {
        border-bottom: 1px solid var(--faint);
    }

    .book-detail-meta div:last-child {
        border-bottom: 0;
    }

    .book-detail-actions {
        gap: 0.65rem;
    }
}

@media (max-width: 430px) {
    .book-detail-primary,
    .book-detail-secondary {
        justify-content: center;
        width: 100%;
    }
}