/* ============================================
   FlipBook3D — Plugin Styles
   https://github.com/raselupm/flipbook3d
============================================ */

:root {
    --fb-shadow-color: rgba(0,0,0,0.5);
    --fb-page-bg: #fff;
    --fb-spine-color: #c8a96e;
    --fb-cover-bg: #1a1a2e;
    --fb-accent: #e8c87d;
    --fb-ui-bg: rgba(10,10,20,0.85);
    --fb-ui-text: #f0e8d8;
}

.flipbook3d-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    font-family: 'Georgia', serif;
    user-select: none;
    -webkit-user-select: none;
}

.flipbook3d-stage {
    position: relative;
    perspective: 2200px;
    perspective-origin: 50% 50%;
}

.flipbook3d-book {
    position: relative;
    transform-style: preserve-3d;
    width: 100%;
    height: 100%;
}

/* Pages container — two halves side by side */
.flipbook3d-spread {
    position: relative;
    display: flex;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

/* Spine between pages */
.flipbook3d-spine {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 8px;
    height: 100%;
    background: linear-gradient(90deg, #8b6914, var(--fb-spine-color), #f5dfa0, var(--fb-spine-color), #8b6914);
    z-index: 10;
    box-shadow: 0 0 15px rgba(0,0,0,0.4);
    border-radius: 1px;
}

/* Left & right static pages */
.flipbook3d-page-left,
.flipbook3d-page-right {
    width: 50%;
    height: 100%;
    overflow: hidden;
    position: relative;
    background: var(--fb-page-bg);
}

.flipbook3d-page-left {
    border-radius: 4px 0 0 4px;
    box-shadow: inset -8px 0 20px rgba(0,0,0,0.08), -6px 0 20px rgba(0,0,0,0.3);
}

.flipbook3d-page-right {
    border-radius: 0 4px 4px 0;
    box-shadow: inset 8px 0 20px rgba(0,0,0,0.08), 6px 0 20px rgba(0,0,0,0.3);
}

.flipbook3d-page-left canvas,
.flipbook3d-page-right canvas {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
    display: block;
}

/* Page curl / flip element */
.flipbook3d-flipper {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    transform-origin: left center;
    transform-style: preserve-3d;
    transition: transform 0.7s cubic-bezier(0.645, 0.045, 0.355, 1.000);
    z-index: 5;
    pointer-events: none;
}

.flipbook3d-flipper.from-right {
    right: 0;
    transform-origin: left center;
}

.flipbook3d-flipper.from-left {
    left: 0;
    transform-origin: right center;
}

.flipbook3d-flipper-front,
.flipbook3d-flipper-back {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    overflow: hidden;
    background: var(--fb-page-bg);
}

.flipbook3d-flipper-front {
    border-radius: 0 4px 4px 0;
    box-shadow: 4px 0 20px rgba(0,0,0,0.2);
}

.flipbook3d-flipper-back {
    transform: rotateY(180deg);
    border-radius: 4px 0 0 4px;
}

.flipbook3d-flipper-front canvas,
.flipbook3d-flipper-back canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* Page number overlay */
.flipbook3d-page-num {
    position: absolute;
    bottom: 12px;
    font-size: 11px;
    color: #999;
    letter-spacing: 0.08em;
    font-family: 'Georgia', serif;
    pointer-events: none;
}
.flipbook3d-page-left .flipbook3d-page-num { left: 16px; }
.flipbook3d-page-right .flipbook3d-page-num { right: 16px; }

/* Page curl gradient for realism */
.page-curl-shadow {
    position: absolute;
    top: 0; right: 0;
    width: 60px; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0,0,0,0.12));
    pointer-events: none;
    z-index: 1;
}
.flipbook3d-page-left .page-curl-shadow {
    left: 0; right: auto;
    background: linear-gradient(90deg, rgba(0,0,0,0.08), transparent);
}

/* Loading overlay */
.flipbook3d-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f0e8;
    border-radius: 4px;
    z-index: 20;
    flex-direction: column;
    gap: 16px;
}

.flipbook3d-loading-spinner {
    width: 40px; height: 40px;
    border: 3px solid #d4b87a;
    border-top-color: transparent;
    border-radius: 50%;
    animation: fb-spin 0.8s linear infinite;
}

.flipbook3d-loading-text {
    font-size: 13px;
    color: #8b6914;
    letter-spacing: 0.1em;
}

@keyframes fb-spin { to { transform: rotate(360deg); } }

/* Controls */
.flipbook3d-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--fb-ui-bg);
    backdrop-filter: blur(12px);
    padding: 10px 20px;
    border-radius: 40px;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.flipbook3d-btn {
    background: none;
    border: 1.5px solid rgba(232, 200, 125, 0.4);
    color: var(--fb-accent);
    padding: 8px 18px;
    border-radius: 24px;
    cursor: pointer;
    font-size: 13px;
    letter-spacing: 0.06em;
    font-family: 'Georgia', serif;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
    line-height: 1;
}

#fb-fs svg {
    float: left;
}

.flipbook3d-btn:hover:not(:disabled) {
    background: rgba(232, 200, 125, 0.15);
    border-color: var(--fb-accent);
    box-shadow: 0 0 12px rgba(232, 200, 125, 0.2);
}

.flipbook3d-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.flipbook3d-page-info {
    color: var(--fb-ui-text);
    font-size: 13px;
    min-width: 90px;
    text-align: center;
    letter-spacing: 0.05em;
    opacity: 0.8;
}

.flipbook3d-fullscreen-btn {
    background: none;
    border: none;
    color: var(--fb-accent);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 18px;
    opacity: 0.7;
    transition: opacity 0.2s;
}
.flipbook3d-fullscreen-btn:hover { opacity: 1; }

.flipbook3d-wrapper:fullscreen,
.flipbook3d-wrapper:-webkit-full-screen,
.flipbook3d-wrapper:-moz-full-screen {
    background: #0a0a14;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* Click zones */
.flipbook3d-click-left,
.flipbook3d-click-right {
    position: absolute;
    top: 0;
    width: 35%;
    height: 100%;
    cursor: pointer;
    z-index: 15;
    transition: background 0.2s;
}
.flipbook3d-click-left { left: 0; border-radius: 4px 0 0 4px; }
.flipbook3d-click-right { right: 0; border-radius: 0 4px 4px 0; }
.flipbook3d-click-left:hover { background: linear-gradient(90deg, rgba(232,200,125,0.06), transparent); }
.flipbook3d-click-right:hover { background: linear-gradient(270deg, rgba(232,200,125,0.06), transparent); }

/* Arrow hints */
.flipbook3d-click-left::after,
.flipbook3d-click-right::after {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 0; height: 0;
    border-style: solid;
    opacity: 0;
    transition: opacity 0.2s;
}
.flipbook3d-click-left::after {
    left: 16px;
    border-width: 10px 14px 10px 0;
    border-color: transparent rgba(232,200,125,0.5) transparent transparent;
}
.flipbook3d-click-right::after {
    right: 16px;
    border-width: 10px 0 10px 14px;
    border-color: transparent transparent transparent rgba(232,200,125,0.5);
}
.flipbook3d-click-left:hover::after,
.flipbook3d-click-right:hover::after { opacity: 1; }

/* Ambient 3D tilt on hover */
.flipbook3d-stage:hover .flipbook3d-book {
    transform: rotateY(-2deg) rotateX(1deg);
    transition: transform 0.4s ease;
}