/**
 * Read-Along Books - Popover Styles
 * Responsive popover/modal system for CMS integration
 */

/* ===== Popover Container ===== */
.read-along-popover {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: grid;
    place-items: center;
    padding: 0;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.read-along-popover.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* ===== Backdrop ===== */
.popover-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(0.5rem);
    -webkit-backdrop-filter: blur(0.5rem);
    animation: fadeIn 0.3s ease;
}

/* ===== Popover Content ===== */
.read-along-popover .popover-content {
    position: relative;
    width: 60vw;
    height: 90vh;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(255, 255, 255, 0.05);
    padding: 0;
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Close Button ===== */
.read-along-popover .popover-close {
    position: absolute;
    top: clamp(0.75rem, 2vw, 1.25rem);
    right: clamp(0.75rem, 2vw, 1.25rem);
    z-index: 10000;
    width: clamp(2rem, 5vw, 2.75rem);
    height: clamp(2rem, 5vw, 2.75rem);
    display: none; /* Hidden - book has its own close button */
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(0.5rem);
    -webkit-backdrop-filter: blur(0.5rem);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.read-along-popover .popover-close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.read-along-popover .popover-close:active {
    transform: scale(0.95);
}

.read-along-popover .popover-close svg {
    width: 60%;
    height: 60%;
}

/* ===== Mobile Swipe Handle ===== */
.swipe-handle {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    padding: clamp(0.5rem, 2vw, 1rem);
    display: none; /* Hidden on desktop */
}

.swipe-handle-bar {
    width: clamp(2.5rem, 15vw, 4rem);
    height: 0.25rem;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 0.125rem;
}

/* ===== Book Iframe ===== */
.book-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

/* ===== Mobile Overrides (≤48em / 768px) ===== */
@media (max-width: 48em) {
    .read-along-popover {
        padding: 0;
    }

    .popover-backdrop {
        /* No backdrop on mobile - full immersive */
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .read-along-popover .popover-content {
        width: 100vw;
        height: 100vh;
        border-radius: 0;
        animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .swipe-handle {
        display: block;
    }

    .read-along-popover .popover-close {
        background: rgba(0, 0, 0, 0.8);
    }
}

/* Removed tablet and desktop size overrides - using 100vw/100vh on all screens */

/* ===== Accessibility ===== */
/* Focus styles for keyboard navigation */
.read-along-popover .popover-close:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .read-along-popover .popover-backdrop,
    .read-along-popover .popover-content {
        animation: none;
    }

    .read-along-popover .popover-close,
    .read-along-popover .book-iframe {
        transition: none;
    }
}

/* ===== Print Styles ===== */
@media print {
    .read-along-popover {
        display: none;
    }
}