/* ============================================================
   PDF Book Viewer — WordPress Plugin Styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Lato:wght@300;400;700&display=swap');

/* ── Root container ── */
.pbv-root {
    --pbv-bg:       #1a1410;
    --pbv-panel:    #241c13;
    --pbv-gold:     #c9a84c;
    --pbv-gold2:    #e8c97a;
    --pbv-text:     #f0e6d0;
    --pbv-text-dim: #9a8a6a;
    --pbv-page-bg:  #fdf6e3;

    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: radial-gradient(ellipse at 50% 60%, #2a2018 0%, #0e0b07 100%);
    border-radius: 8px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.6);
    font-family: 'Lato', sans-serif;
    color: var(--pbv-text);
    box-sizing: border-box;
    user-select: none;
}
.pbv-root *, .pbv-root *::before, .pbv-root *::after {
    box-sizing: border-box;
}

/* ── Error message ── */
.pbv-error {
    color: #e07070;
    background: #2a1a1a;
    border: 1px solid #7a3333;
    padding: 0.8rem 1.2rem;
    border-radius: 6px;
    font-size: 0.9rem;
}

/* ── Toolbar ── */
.pbv-toolbar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 1.2rem;
    background: linear-gradient(180deg, #241c13 0%, #1d1610 100%);
    border-bottom: 1px solid rgba(201,168,76,0.2);
    box-shadow: 0 2px 12px rgba(0,0,0,0.5);
    flex-wrap: wrap;
    z-index: 10;
}

.pbv-title {
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    color: var(--pbv-gold);
    letter-spacing: 0.04em;
    margin-right: auto;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 260px;
}

.pbv-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(201,168,76,0.15);
    border-radius: 7px;
    padding: 0.25rem 0.6rem;
}

.pbv-label {
    font-size: 0.68rem;
    color: var(--pbv-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.pbv-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--pbv-gold);
    font-size: 1rem;
    width: 28px; height: 28px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 5px;
    transition: background 0.2s, color 0.2s;
    padding: 0;
    line-height: 1;
}
.pbv-btn:hover { background: rgba(201,168,76,0.15); color: var(--pbv-gold2); }
.pbv-btn:disabled { opacity: 0.3; cursor: default; }

.pbv-value {
    min-width: 42px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--pbv-text);
    font-weight: 700;
}

.pbv-range {
    -webkit-appearance: none;
    appearance: none;
    width: 80px; height: 4px;
    background: rgba(201,168,76,0.2);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    border: none;
}
.pbv-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 13px; height: 13px;
    border-radius: 50%;
    background: var(--pbv-gold);
    cursor: pointer;
    transition: transform 0.15s;
}
.pbv-range::-webkit-slider-thumb:hover { transform: scale(1.3); }
.pbv-range::-moz-range-thumb {
    width: 13px; height: 13px;
    border-radius: 50%;
    background: var(--pbv-gold);
    cursor: pointer;
    border: none;
}

/* ── Stage ── */
.pbv-stage {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: auto;
    min-height: 0;
}

.pbv-stage::before {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 80%; height: 35%;
    background: radial-gradient(ellipse, rgba(100,70,30,0.2) 0%, transparent 70%);
    pointer-events: none;
}

/* ── Book wrapper ── */
.pbv-book {
    position: relative;
    display: flex;
    align-items: stretch;
    filter: drop-shadow(0 24px 50px rgba(0,0,0,0.85));
}

/* ── Page sides ── */
.pbv-page {
    position: relative;
    overflow: hidden;
    background: var(--pbv-page-bg);
    flex-shrink: 0;
}
.pbv-page-left  { border-radius: 3px 0 0 3px; }
.pbv-page-right { border-radius: 0 3px 3px 0; }

/* line texture */
.pbv-page::before {
    content: '';
    position: absolute; inset: 0;
    background-image: repeating-linear-gradient(
        0deg,
        transparent, transparent 29px,
        rgba(0,0,0,0.035) 30px
    );
    pointer-events: none;
    z-index: 2;
}

/* binding shadow — left page right edge */
.pbv-page-left::after {
    content: '';
    position: absolute; top: 0; right: 0;
    width: 40px; height: 100%;
    background: linear-gradient(to left, rgba(0,0,0,0.16) 0%, transparent 100%);
    pointer-events: none; z-index: 3;
}
/* binding shadow — right page left edge */
.pbv-page-right::before {
    content: '';
    position: absolute; top: 0; left: 0;
    width: 40px; height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.16) 0%, transparent 100%);
    pointer-events: none; z-index: 3;
}

.pbv-page canvas {
    display: block;
}

/* page number */
.pbv-pnum {
    position: absolute;
    bottom: 8px;
    font-family: 'Playfair Display', serif;
    font-size: 0.75rem;
    color: rgba(0,0,0,0.3);
    z-index: 10;
    pointer-events: none;
}
.pbv-page-left  .pbv-pnum { left: 16px; }
.pbv-page-right .pbv-pnum { right: 16px; }

/* ── Spine ── */
.pbv-spine {
    width: 18px;
    flex-shrink: 0;
    background: linear-gradient(to right,
        #6b4c2a 0%, #a07040 30%, #c49050 50%, #a07040 70%, #6b4c2a 100%);
    box-shadow: inset -2px 0 6px rgba(0,0,0,0.4), inset 2px 0 6px rgba(0,0,0,0.4);
    position: relative;
    z-index: 5;
}
.pbv-spine::after {
    content: '';
    position: absolute; inset: 0;
    background: repeating-linear-gradient(
        180deg,
        transparent 0px, transparent 18px,
        rgba(255,255,255,0.04) 19px, rgba(255,255,255,0.04) 20px
    );
}

/* ── Flip overlay ── */
.pbv-flip-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 20;
    perspective: 2400px;
}

/* ── Nav arrows ── */
.pbv-nav {
    position: absolute;
    top: 50%; transform: translateY(-50%);
    background: rgba(201,168,76,0.1);
    border: 1px solid rgba(201,168,76,0.28);
    color: var(--pbv-gold);
    width: 42px; height: 64px;
    border-radius: 7px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    font-size: 1.3rem;
    transition: background 0.2s, color 0.2s, transform 0.2s;
    z-index: 30;
    line-height: 1;
}
.pbv-nav:hover {
    background: rgba(201,168,76,0.22);
    color: var(--pbv-gold2);
    transform: translateY(-50%) scale(1.07);
}
.pbv-nav:disabled {
    opacity: 0.2;
    cursor: default;
    pointer-events: none;
}
.pbv-nav-prev { left: 10px; }
.pbv-nav-next { right: 10px; }

/* ── Loading spinner ── */
.pbv-loading {
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    background: rgba(14,11,7,0.82);
    z-index: 50;
    transition: opacity 0.35s, visibility 0.35s;
}
.pbv-loading.pbv-hidden { opacity: 0; visibility: hidden; }
.pbv-spinner {
    width: 46px; height: 46px;
    border: 3px solid rgba(201,168,76,0.15);
    border-top-color: #c9a84c;
    border-radius: 50%;
    animation: pbv-spin 0.85s linear infinite;
    margin-bottom: 1rem;
}
@keyframes pbv-spin { to { transform: rotate(360deg); } }
.pbv-loading p {
    color: #9a8a6a;
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    margin: 0;
}