/* ─── Grundvariablen & Container ───────────────────────────────── */

.bookpdf {
    --bookpdf-bg:          linear-gradient(135deg, #e7e1d1 0%, #c9b89a 100%);
    --bookpdf-paper:       #fbf7ef;
    --bookpdf-paper-edge:  #f0e5ce;
    --bookpdf-ink:         #30261c;
    --bookpdf-accent:      #6e4d33;
    --bookpdf-border:      rgba(60, 39, 18, 0.18);
    --bookpdf-shadow:      0 28px 60px rgba(26, 15, 4, 0.18);
    --bookpdf-radius:      22px;
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
        "toolbar"
        "thumbs"
        "stage"
        "pagebar"
        "footer";
    margin: 2rem 0;
    padding: 1.2rem;
    border-radius: var(--bookpdf-radius);
    background: var(--bookpdf-bg);
    box-shadow: var(--bookpdf-shadow);
    color: var(--bookpdf-ink);
    overflow: hidden;
}

.bookpdf::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top left,  rgba(255,255,255,0.45), transparent 28%),
        radial-gradient(circle at bottom right, rgba(68,40,10,0.18), transparent 24%);
    pointer-events: none;
}

/* ─── Toolbar ──────────────────────────────────────────────────── */

.bookpdf__toolbar {
    grid-area: toolbar;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 0.85rem;
}

.bookpdf__controls-left {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: wrap;
}

/* ─── Buttons ──────────────────────────────────────────────────── */

.bookpdf__button {
    padding: 0.46rem 0.9rem;
    border: 1px solid var(--bookpdf-border);
    border-radius: 999px;
    background: rgba(255, 248, 235, 0.9);
    color: var(--bookpdf-ink);
    font: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: transform 0.16s ease, background 0.16s ease, box-shadow 0.16s ease;
    white-space: nowrap;
    line-height: 1.4;
}

.bookpdf__button:hover:not(:disabled),
.bookpdf__button:focus-visible:not(:disabled) {
    background: #fff8eb;
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(38, 22, 5, 0.13);
}

.bookpdf__button:disabled {
    opacity: 0.28;
    cursor: default;
}

.bookpdf__button--icon {
    padding: 0.46rem 0.7rem;
    font-size: 1rem;
    font-weight: 700;
    min-width: 2.2rem;
    text-align: center;
}

.bookpdf__button--small {
    padding: 0.32rem 0.58rem;
    font-size: 0.82rem;
}

.bookpdf__button--active {
    background: rgba(110, 77, 51, 0.18);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.12);
}

/* Gruppierte Buttons (eng beieinander) */
.bookpdf__btn-group {
    display: flex;
    align-items: center;
}

.bookpdf__btn-group .bookpdf__button {
    border-radius: 0;
    margin-left: -1px;
    position: relative;
}

.bookpdf__btn-group .bookpdf__button:first-child {
    border-radius: 999px 0 0 999px;
    margin-left: 0;
}

.bookpdf__btn-group .bookpdf__button:last-child {
    border-radius: 0 999px 999px 0;
}

.bookpdf__btn-group .bookpdf__button:only-child {
    border-radius: 999px;
}

/* ─── Suchbereich ──────────────────────────────────────────────── */

.bookpdf__search-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.bookpdf__search-wrap[hidden] {
    display: none;
}

.bookpdf__search-field {
    position: relative;
    display: flex;
    align-items: center;
}

/* Eigentliches Input-Element (Klasse auf dem <input>) */
.bookpdf__search-input {
    padding: 0.48rem 2.1rem 0.48rem 0.9rem;
    border: 1px solid var(--bookpdf-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    font: inherit;
    font-size: 0.9rem;
    color: var(--bookpdf-ink);
    min-width: 12rem;
    width: 14rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.bookpdf__search-input:focus {
    outline: none;
    border-color: var(--bookpdf-accent);
    box-shadow: 0 0 0 3px rgba(110, 77, 51, 0.15);
}

/* Nativen Browser-Löschen-Button ausblenden */
.bookpdf__search-input[type="search"]::-webkit-search-cancel-button,
.bookpdf__search-input[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
    appearance: none;
}

/* × im Suchfeld */
.bookpdf__search-clear {
    position: absolute;
    right: 0.42rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.5rem;
    height: 1.5rem;
    display: none;              /* Wird per JS/.has-value sichtbar */
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: rgba(110, 77, 51, 0.16);
    color: var(--bookpdf-ink);
    font-size: 0.85rem;
    line-height: 1;
    padding: 0;
    cursor: pointer;
    transition: background 0.15s;
}

.bookpdf__search-clear:hover {
    background: rgba(110, 77, 51, 0.32);
}

/* Sichtbar, wenn das Feld einen Wert hat (via JS-Klasse) */
.bookpdf__search-field--has-value .bookpdf__search-clear {
    display: flex;
}

/* Trefferanzahl-Anzeige */
.bookpdf__search-status {
    font-size: 0.88rem;
    color: rgba(48, 38, 28, 0.68);
    min-width: 3.5rem;
    white-space: nowrap;
}

/* ─── Miniaturansicht-Streifen ─────────────────────────────────── */

.bookpdf__thumbs {
    grid-area: thumbs;
    position: relative;
    z-index: 2;
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.65rem 0.5rem;
    margin-bottom: 0.85rem;
    background: rgba(0, 0, 0, 0.07);
    border-radius: 12px;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: rgba(110, 77, 51, 0.35) transparent;
}

.bookpdf__thumbs::-webkit-scrollbar { height: 4px; }
.bookpdf__thumbs::-webkit-scrollbar-thumb {
    background: rgba(110, 77, 51, 0.35);
    border-radius: 999px;
}

.bookpdf__thumb {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.3rem 0.35rem 0.25rem;
    border: 2px solid transparent;
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.72);
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s, background 0.15s;
    font: inherit;
    color: var(--bookpdf-ink);
}

.bookpdf__thumb:hover {
    border-color: var(--bookpdf-accent);
    transform: translateY(-2px);
}

.bookpdf__thumb--active {
    border-color: var(--bookpdf-accent);
    background: rgba(110, 77, 51, 0.14);
}

.bookpdf__thumb canvas {
    display: block;
    box-shadow: 0 2px 5px rgba(0,0,0,0.18);
    border-radius: 3px;
}

.bookpdf__thumb span {
    font-size: 0.68rem;
    opacity: 0.65;
    letter-spacing: 0.01em;
}

/* ─── Stage ────────────────────────────────────────────────────── */

.bookpdf__stage {
    grid-area: stage;
    position: relative;        /* Wichtig für absolute Nav-Buttons */
    z-index: 1;
    min-height: 38rem;
    padding: 1.1rem 2.8rem;   /* Seitenplatz für Nav-Buttons */
    border-radius: 18px;
    background:
        linear-gradient(180deg, rgba(115,90,58,0.16), rgba(62,38,15,0.12)),
        linear-gradient(90deg,  rgba(255,255,255,0.24), rgba(115,84,41,0.08));
    overflow: visible;         /* Nav-Buttons dürfen herausragen */
    touch-action: pan-y pinch-zoom;
}

/* ─── Seitennavigation (floating am Rand) ──────────────────────── */

.bookpdf__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 2.2rem;
    height: 5.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--bookpdf-border);
    border-radius: 8px;
    background: rgba(255, 248, 235, 0.92);
    color: var(--bookpdf-ink);
    font-size: 1.6rem;
    font-weight: 300;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(28, 16, 5, 0.16);
    transition: background 0.16s, opacity 0.16s, transform 0.16s;
    opacity: 0.65;
    line-height: 1;
    padding: 0;
}

.bookpdf__nav:hover:not(:disabled) {
    background: #fff8eb;
    opacity: 1;
    transform: translateY(-50%) scale(1.05);
}

.bookpdf__nav:disabled {
    opacity: 0.18;
    cursor: default;
}

.bookpdf__nav--prev { left:  0.25rem; }
.bookpdf__nav--next { right: 0.25rem; }

/* ─── Buch-Grid ────────────────────────────────────────────────── */

.bookpdf__book {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem;
    height: 100%;
    align-items: center;
    perspective: 1600px;
}

/* ─── Seiten-Slots ─────────────────────────────────────────────── */

.bookpdf__page-slot {
    position: relative;
    min-height: 34rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: transform 0.26s ease, opacity 0.26s ease;
}

.bookpdf__page-shell {
    position: relative;         /* Für absolut positionierte HL-Canvas */
    width: 100%;
    min-height: 32rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background:
        linear-gradient(90deg, rgba(0,0,0,0.12) 0, rgba(0,0,0,0) 8%, rgba(0,0,0,0) 92%, rgba(0,0,0,0.12) 100%),
        linear-gradient(135deg, var(--bookpdf-paper) 0%, var(--bookpdf-paper-edge) 100%);
    box-shadow:
        inset 0 0 0 1px rgba(93, 71, 45, 0.08),
        0 18px 34px rgba(28, 16, 5, 0.18);
    overflow: hidden;
}

.bookpdf__page-slot--left .bookpdf__page-shell::after,
.bookpdf__page-slot--right .bookpdf__page-shell::after {
    content: "";
    position: absolute;
    top: 0;
    width: 2rem;
    height: 100%;
    pointer-events: none;
}

.bookpdf__page-slot--left .bookpdf__page-shell::after {
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(0,0,0,0.1));
}

.bookpdf__page-slot--right .bookpdf__page-shell::after {
    left: 0;
    background: linear-gradient(270deg, transparent, rgba(0,0,0,0.1));
}

.bookpdf__page-slot--empty {
    opacity: 0.22;
}

.bookpdf__page-slot--empty .bookpdf__page-shell {
    background:
        repeating-linear-gradient(
            135deg,
            rgba(255,255,255,0.55) 0,
            rgba(255,255,255,0.55) 16px,
            rgba(242,231,211,0.75) 16px,
            rgba(242,231,211,0.75) 32px
        );
}

/* ─── Canvas-Elemente ──────────────────────────────────────────── */

.bookpdf__canvas {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    display: block;
    box-shadow: 0 0 18px rgba(0,0,0,0.06);
}

/* Highlight-Overlay-Canvas */
.bookpdf__hl-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    mix-blend-mode: multiply;
}

/* Treffer-Badge auf der Seite */
.bookpdf__page-match {
    position: absolute;
    right: 0.7rem;
    bottom: 0.7rem;
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.55rem;
    border-radius: 999px;
    background: rgba(110, 77, 51, 0.88);
    color: #fff7ee;
    font-size: 0.78rem;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(50, 26, 4, 0.24);
    pointer-events: none;
}

.bookpdf__page-match:empty { display: none; }

/* ─── Seitenleiste (Folio + Seiten-Sprung) ─────────────────────── */

.bookpdf__pagebar {
    grid-area: pagebar;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.7rem;
    padding: 0 0.3rem;
}

.bookpdf__pagejump-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Seitenzahl-Badge */
.bookpdf__folio-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    background: rgba(48, 38, 28, 0.12);
    color: var(--bookpdf-ink);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.025em;
    transition: background 0.15s;
}

.bookpdf__folio-badge:empty { visibility: hidden; }

/* Seiten-Sprung */
.bookpdf__pagejump {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.88rem;
    color: rgba(48, 38, 28, 0.65);
}

.bookpdf__pagejump-input {
    width: 4rem;
    padding: 0.28rem 0.5rem;
    text-align: center;
    border: 1px solid var(--bookpdf-border);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.82);
    font: inherit;
    font-size: 0.88rem;
    color: var(--bookpdf-ink);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.bookpdf__pagejump-input:focus {
    outline: none;
    border-color: var(--bookpdf-accent);
    box-shadow: 0 0 0 3px rgba(110, 77, 51, 0.14);
}

/* Spinner ausblenden */
.bookpdf__pagejump-input[type="number"]::-webkit-inner-spin-button,
.bookpdf__pagejump-input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
}

.bookpdf__pagejump-input[type="number"] { -moz-appearance: textfield; }

.bookpdf__pagejump-sep,
.bookpdf__pagejump-total { opacity: 0.6; }

/* ─── Footer (Status + Version) ────────────────────────────────── */

.bookpdf__footer {
    grid-area: footer;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.4rem;
    margin-top: 0.75rem;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(48, 38, 28, 0.6);
}

.bookpdf__status {
    font-style: italic;
    letter-spacing: normal;
    text-transform: none;
}

.bookpdf__version-value { font-weight: 700; }

/* ─── Blätter-Animationen ──────────────────────────────────────── */

.bookpdf--turn-next .bookpdf__page-slot--left,
.bookpdf--turn-next .bookpdf__page-slot--right {
    transform: rotateY(-8deg) translateX(-0.4rem);
}

.bookpdf--turn-prev .bookpdf__page-slot--left,
.bookpdf--turn-prev .bookpdf__page-slot--right {
    transform: rotateY(8deg) translateX(0.4rem);
}

/* ─── Einzelseiten-Modus ───────────────────────────────────────── */

.bookpdf--single .bookpdf__book {
    grid-template-columns: minmax(0, 1fr);
    max-width: min(100%, 42rem);
    margin: 0 auto;
}

.bookpdf--single .bookpdf__page-slot--right { display: none; }

.bookpdf--thumbs-bottom {
    grid-template-areas:
        "toolbar"
        "stage"
        "pagebar"
        "thumbs"
        "footer";
}

.bookpdf--thumbs-left {
    grid-template-columns: minmax(10rem, 12rem) minmax(0, 1fr);
    grid-template-areas:
        "toolbar toolbar"
        "thumbs stage"
        "thumbs pagebar"
        "thumbs footer";
    column-gap: 1rem;
}

.bookpdf--thumbs-right {
    grid-template-columns: minmax(0, 1fr) minmax(10rem, 12rem);
    grid-template-areas:
        "toolbar toolbar"
        "stage thumbs"
        "pagebar thumbs"
        "footer thumbs";
    column-gap: 1rem;
}

.bookpdf--thumbs-left .bookpdf__thumbs,
.bookpdf--thumbs-right .bookpdf__thumbs {
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    max-height: 42rem;
    margin-bottom: 0;
}

/* ─── Vollbild ─────────────────────────────────────────────────── */

.bookpdf:fullscreen,
.bookpdf:-webkit-full-screen {
    margin: 0;
    width: 100%;
    height: 100%;
    border-radius: 0;
    box-shadow: none;
    overflow-y: auto;
}

.bookpdf:fullscreen .bookpdf__stage,
.bookpdf:-webkit-full-screen .bookpdf__stage {
    min-height: calc(100vh - 12rem);
}

/* ─── Responsive ───────────────────────────────────────────────── */

@media (max-width: 860px) {
    .bookpdf {
        padding: 0.85rem;
        border-radius: 18px;
    }

    .bookpdf__stage {
        min-height: 30rem;
        padding: 0.8rem 2.4rem;
    }

    .bookpdf__page-slot,
    .bookpdf__page-shell {
        min-height: 27rem;
    }

    .bookpdf__search-input {
        min-width: 9rem;
        width: 11rem;
    }

    .bookpdf__toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .bookpdf--thumbs-left,
    .bookpdf--thumbs-right {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
            "toolbar"
            "thumbs"
            "stage"
            "pagebar"
            "footer";
        column-gap: 0;
    }

    .bookpdf--thumbs-left .bookpdf__thumbs,
    .bookpdf--thumbs-right .bookpdf__thumbs {
        flex-direction: row;
        overflow-x: auto;
        overflow-y: hidden;
        max-height: none;
    }
}

@media (max-width: 560px) {
    .bookpdf__stage {
        padding: 0.75rem;
    }

    .bookpdf__nav {
        display: none;
    }

    .bookpdf__book {
        grid-template-columns: minmax(0, 1fr);
    }

    .bookpdf__page-slot--right { display: none; }

    .bookpdf__nav--prev { left: 0; }
    .bookpdf__nav--next { right: 0; }
}