:root {
    --walnut: #2a1810;
    --walnut-deep: #1c100a;
    --plank: #4a2c17;
    --brass: #c4a15a;
    --brass-deep: #9a7a32;
    --cream: #f4ecdf;
    --paper: #fff8ee;
    --ink: #1c140e;
    --muted: #6b5a4a;
    --oxblood: #6b1e2c;
    --lamp: #e8c17a;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background: var(--cream);
    font-family: "Source Sans 3", "Segoe UI", sans-serif;
}

h1, h2, h3, .dbs-brand span, .dbs-case-label, .dbs-book-spine {
    font-family: "Fraunces", Georgia, serif;
}

.dbs-body-page {
    display: flex;
    flex-direction: column;
}

.dbs-body-page main {
    flex: 1 0 auto;
}

.dbs-body-room {
    height: 100vh;
    overflow: hidden;
    background: #1a120c;
}

.dbs-body-room main {
    height: 100%;
}

.dbs-nav {
    background: var(--walnut-deep);
    box-shadow: 0 2px 16px rgba(20, 12, 8, 0.35);
}

.dbs-nav-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    background: linear-gradient(180deg, rgba(18, 10, 6, 0.78) 0%, rgba(18, 10, 6, 0.15) 100%);
    box-shadow: none;
}

.dbs-nav .navbar-toggler {
    border-color: rgba(244, 236, 223, 0.35);
}

.dbs-nav .navbar-toggler-icon {
    filter: invert(1);
}

.dbs-brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    color: var(--cream) !important;
    font-size: 1.45rem;
    font-weight: 600;
}

.dbs-brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 68%;
    border: 1px solid var(--brass);
    background: var(--cream);
}

.dbs-nav .nav-link,
.dbs-nav .nav-link.btn {
    color: rgba(244, 236, 223, 0.88) !important;
    font-weight: 500;
    text-decoration: none;
}

.dbs-nav .nav-link:hover,
.dbs-nav .nav-link.btn:hover {
    color: var(--brass) !important;
}

.dbs-find {
    background: rgba(244, 236, 223, 0.1);
    border: 1px solid rgba(196, 161, 90, 0.45);
    color: var(--cream);
    border-radius: 999px;
    padding: 0.38rem 0.95rem;
    min-width: 190px;
}

.dbs-find::placeholder {
    color: rgba(244, 236, 223, 0.55);
}

.dbs-find:focus {
    outline: none;
    border-color: var(--brass);
    box-shadow: 0 0 0 0.18rem rgba(196, 161, 90, 0.28);
}

.dbs-room {
    position: relative;
    height: 100vh;
    overflow-x: auto;
    overflow-y: hidden;
    perspective: 1600px;
}

.dbs-room-photo,
.dbs-room-shade {
    position: fixed;
    inset: 0;
    pointer-events: none;
}

.dbs-room-photo {
    background: #1a120c url("/images/room/study.jpg") center / cover no-repeat;
    z-index: 0;
}

.dbs-room-shade {
    z-index: 1;
    background:
        linear-gradient(180deg, rgba(18, 10, 6, 0.42) 0%, transparent 24%),
        linear-gradient(90deg, rgba(18, 10, 6, 0.18) 0%, transparent 28%, transparent 68%, rgba(18, 10, 6, 0.12) 100%);
}

.dbs-stage {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: flex-end;
    gap: 1.6rem;
    min-height: 100vh;
    min-width: max-content;
    padding: 5.6rem 26vw 8.5vh 2.2rem;
}

.dbs-case {
    flex: 0 0 308px;
    background-color: #140c08;
    border: 12px solid #2c1810;
    border-bottom-width: 18px;
    border-radius: 3px 3px 2px 2px;
    box-shadow:
        0 22px 38px rgba(0, 0, 0, 0.42),
        inset 0 0 0 3px #4a2c1a;
    padding: 0.35rem 0.45rem 0.45rem;
}

.dbs-case-label {
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #ead7a6;
    text-align: center;
    margin: 0.2rem 0 0.45rem;
    min-height: 1.15rem;
    position: relative;
    z-index: 2;
    text-shadow: 0 1px 0 #140c08;
}

.dbs-shelf {
    position: relative;
    height: 172px;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    gap: 3px;
    padding: 0 8px 12px;
    margin-bottom: 7px;
    background: linear-gradient(180deg, rgba(6, 3, 2, 0.92) 0%, rgba(28, 14, 8, 0.78) 100%);
    box-shadow: inset 0 12px 16px rgba(0, 0, 0, 0.45);
}

.dbs-shelf:last-child {
    margin-bottom: 0;
}

.dbs-shelf::after {
    content: "";
    position: absolute;
    left: -3px;
    right: -3px;
    bottom: 0;
    height: 11px;
    background: url("/images/room/shelf-wood.jpg") center / cover;
    box-shadow: 0 5px 8px rgba(0, 0, 0, 0.45);
}

.dbs-book {
    --spine: #5b1e2f;
    --h: 160px;
    --w: 26px;
    position: relative;
    width: var(--w);
    height: var(--h);
    border: 0;
    padding: 0;
    cursor: pointer;
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.38) 0%, rgba(255, 255, 255, 0.12) 10%, transparent 22%, transparent 80%, rgba(0, 0, 0, 0.3) 100%),
        var(--spine);
    color: #f3e4c6;
    transform-origin: left center;
    transition: transform 0.22s ease, filter 0.22s ease;
    box-shadow: 1px 0 0 rgba(0, 0, 0, 0.4);
}

.dbs-book:hover,
.dbs-book:focus-visible {
    transform: translateY(-10px) rotateY(-10deg);
    z-index: 4;
    outline: none;
    filter: brightness(1.08);
}

.dbs-book.is-hit {
    outline: 2px solid var(--brass);
    outline-offset: 2px;
    transform: translateY(-10px);
}

.dbs-book-spine {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    line-height: 1;
    padding: 10px 0 26px;
    width: 100%;
    height: 100%;
    display: block;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: clip;
    text-align: center;
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.45);
}

.dbs-book-vol {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 5px;
    font-family: "Fraunces", Georgia, serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-align: center;
    color: #f3e4c6;
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.55);
    pointer-events: none;
}

.dbs-book-pages {
    position: absolute;
    right: -3px;
    top: 3px;
    bottom: 3px;
    width: 3px;
    background: repeating-linear-gradient(#f4ead6, #f4ead6 1px, #e2d3b4 1px, #e2d3b4 2px);
}

.dbs-book.is-hardcover {
    box-shadow:
        1px 0 0 rgba(0, 0, 0, 0.45),
        inset 0 0 0 1px rgba(212, 175, 86, 0.18);
}

.dbs-book.is-hardcover::before {
    content: "";
    position: absolute;
    left: 12%;
    right: 12%;
    top: 16%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 86, 0.85), transparent);
}

.dbs-book.is-hardcover .dbs-book-pages {
    width: 4px;
    right: -4px;
}

.dbs-book.is-paperback .dbs-book-pages {
    width: 4px;
    right: -3px;
}

.dbs-book.is-digital .dbs-book-pages,
.dbs-book.is-audiobook .dbs-book-pages {
    display: none;
}

.dbs-book.is-digital {
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.55) 0%, rgba(220, 230, 240, 0.16) 14%, transparent 32%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 30%),
        var(--spine);
    box-shadow: inset 0 0 0 1px rgba(190, 210, 230, 0.28);
}

.dbs-book.is-digital .dbs-book-spine {
    letter-spacing: 0.02em;
    font-size: 0.58rem;
}

.dbs-book.is-audiobook {
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.35) 0%, rgba(255, 255, 255, 0.1) 12%, transparent 28%),
        var(--spine);
}

.dbs-book.is-audiobook::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 8px;
    width: 7px;
    height: 7px;
    transform: translateX(-50%);
    border-radius: 50%;
    border: 1px solid rgba(243, 228, 198, 0.7);
}

.dbs-waiting {
    position: fixed;
    left: 1.4rem;
    bottom: 1rem;
    z-index: 5;
    margin: 0;
    color: rgba(244, 236, 223, 0.86);
    font-size: 0.92rem;
    letter-spacing: 0.02em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);
}

.dbs-jacket {
    border: 0;
    padding: 0;
    background: transparent;
    max-width: 740px;
    width: calc(100% - 2rem);
}

.dbs-jacket::backdrop {
    background: rgba(16, 9, 5, 0.72);
}

.dbs-jacket-inner {
    display: grid;
    grid-template-columns: 230px 1fr;
    background: var(--paper);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.48);
}

.dbs-jacket-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    padding: 1rem 0.85rem;
    background: #1a120c;
}

.dbs-jacket-cover img {
    max-width: 100%;
    max-height: 28rem;
    width: auto;
    height: auto;
    object-fit: contain;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
}

.dbs-jacket-letter {
    display: none;
    color: var(--cream);
    font-family: "Fraunces", Georgia, serif;
    font-size: 4rem;
}

.dbs-jacket-cover.is-empty .dbs-jacket-letter {
    display: grid;
}

.dbs-jacket-cover.is-empty img {
    display: none;
}

.dbs-jacket-copy {
    padding: 1.6rem 1.7rem 1.5rem;
}

.dbs-eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--brass-deep);
    margin-bottom: 0.4rem;
}

.dbs-jacket-copy h2 {
    font-size: 2rem;
    margin: 0 0 0.35rem;
    line-height: 1.15;
}

.dbs-jacket-subtitle {
    font-style: italic;
    color: var(--muted);
    margin-bottom: 0.4rem;
}

.dbs-jacket-by {
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.dbs-jacket-series {
    color: var(--muted);
    font-style: italic;
    margin-bottom: 0.35rem;
}

.dbs-jacket-copies {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.55rem 0 1rem;
}

.dbs-copy-card {
    min-width: 7.2rem;
    border: 1px solid rgba(196, 161, 90, 0.45);
    border-radius: 10px;
    padding: 0.42rem 0.7rem 0.5rem;
    background: rgba(196, 161, 90, 0.08);
}

.dbs-copy-card strong {
    display: block;
    font-size: 0.78rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--brass-deep);
}

.dbs-copy-card span {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.78rem;
    color: var(--muted);
}

.dbs-copy-editor {
    border: 1px solid #e6d9c4;
    border-radius: 12px;
    padding: 0.9rem 1rem 0.35rem;
    margin-bottom: 0.75rem;
    background: #fbf6ee;
}

.dbs-jacket-length {
    color: var(--muted);
    font-size: 0.92rem;
    margin-bottom: 0.45rem;
}

.dbs-jacket-notes {
    color: var(--ink);
    line-height: 1.55;
}

.dbs-btn-close {
    margin-top: 1.1rem;
    background: var(--brass);
    border-color: var(--brass);
    color: var(--walnut-deep);
    font-weight: 600;
    border-radius: 999px;
    padding: 0.55rem 1.1rem;
}

.dbs-btn-close:hover,
.dbs-btn-close:focus {
    background: var(--brass-deep);
    border-color: var(--brass-deep);
    color: var(--cream);
}

.dbs-footer {
    background: var(--walnut-deep);
    color: rgba(244, 236, 223, 0.78);
}

.dbs-footer a {
    color: var(--brass);
    text-decoration: none;
}

.dbs-footer a:hover {
    color: var(--cream);
}

.dbs-footer-dot {
    margin: 0 0.4rem;
}

.dbs-admin-page {
    padding: 3rem 0 4rem;
}

.dbs-admin-panel {
    background: var(--paper);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(28, 20, 14, 0.08);
}

.dbs-login-panel {
    max-width: 28rem;
    margin: 1rem auto;
    text-align: center;
}

.dbs-login-panel form {
    text-align: left;
}

.dbs-admin-lead {
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.dbs-admin-page h1 {
    font-size: 2.4rem;
}

.dbs-empty-mark {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    border: 2px solid var(--brass);
}

.dbs-alert {
    background: #efe4cc;
    border: 1px solid #d4c09a;
    color: var(--walnut);
}

.dbs-stack-heading {
    font-size: 1.45rem;
    margin: 1.6rem 0 0.7rem;
}

.dbs-table {
    --bs-table-bg: transparent;
}

.dbs-table thead th {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0.9rem 1rem;
}

.dbs-table td {
    padding: 0.9rem 1rem;
}

.dbs-thumb {
    width: 42px;
    height: 58px;
    object-fit: cover;
    border-radius: 3px;
    background: var(--walnut);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.dbs-thumb-empty {
    display: inline-block;
}

.dbs-preview {
    width: 110px;
    height: 160px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
}

.dbs-buy {
    background: var(--brass);
    border-color: var(--brass);
    color: var(--walnut-deep);
    font-weight: 600;
    padding: 0.65rem 1.1rem;
    border-radius: 999px;
}

.dbs-buy:hover,
.dbs-buy:focus {
    background: var(--brass-deep);
    border-color: var(--brass-deep);
    color: var(--cream);
}

.dbs-btn-quiet {
    border: 1px solid #ddd2c3;
    color: var(--walnut);
    background: transparent;
}

.dbs-btn-quiet:hover {
    background: var(--cream);
    color: var(--walnut-deep);
}

.dbs-btn-danger {
    color: var(--oxblood);
    border: 1px solid #e3c3cd;
    background: transparent;
}

.dbs-btn-danger:hover {
    background: #f6e4ea;
    color: var(--oxblood);
}

.form-control:focus,
.form-check-input:focus {
    border-color: var(--brass);
    box-shadow: 0 0 0 0.2rem rgba(196, 161, 90, 0.25);
}

@media (prefers-reduced-motion: reduce) {
    .dbs-book,
    .dbs-book:hover,
    .dbs-book:focus-visible,
    .dbs-book.is-hit {
        transition: none;
        transform: none;
    }
}

@media (max-width: 767.98px) {
    .dbs-body-room {
        height: auto;
        overflow: auto;
    }

    .dbs-room {
        height: auto;
        overflow: visible;
        min-height: 100vh;
    }

    .dbs-room-photo,
    .dbs-room-shade {
        position: absolute;
        min-height: 100%;
    }

    .dbs-stage {
        flex-direction: column;
        align-items: stretch;
        min-width: 0;
        padding: 5.2rem 0.9rem 5.5rem;
    }

    .dbs-case {
        flex: none;
        width: 308px;
    }

    .dbs-waiting {
        position: static;
        padding: 0 1rem 1.2rem;
    }

    .dbs-nav-overlay .navbar-collapse.show {
        background: rgba(18, 10, 6, 0.94);
        padding: 0.85rem;
        border-radius: 10px;
        margin-top: 0.5rem;
    }

    .dbs-find {
        width: 100%;
        min-width: 0;
        margin: 0.4rem 0;
    }

    .dbs-jacket {
        width: 100%;
        max-width: none;
        margin: auto 0 0;
    }

    .dbs-jacket-inner {
        grid-template-columns: 1fr;
        border-radius: 16px 16px 0 0;
    }

    .dbs-jacket-cover {
        min-height: 200px;
        padding: 0.85rem 1rem 0;
    }

    .dbs-jacket-cover img {
        max-height: 16rem;
    }

    .dbs-admin-panel {
        padding: 1.35rem;
    }
}