*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #0a0a0a;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    color: #fff;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #0a0a0a;
    z-index: 1000;
    transition: opacity 0.6s ease;
}

#loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

#loading-screen p {
    margin-top: 16px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.loader {
    width: 36px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.08);
    border-top-color: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Flipbook Viewport */
#flipbook-viewport {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: radial-gradient(ellipse at center, #ffffff 0%, #ffffff 70%);
}

/* Flipbook Wrapper */
#flipbook-wrapper {
    position: relative;
}

/* Page Styling */
.page {
    background: #fff;
    overflow: hidden;
    position: relative;
}

.page img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
    pointer-events: none;
}

/* Video Overlay */
#video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    display: none;
}

#video-overlay video {
    position: absolute;
    pointer-events: auto;
    object-fit: cover;
    background: #222;
    border: none;
    outline: none;
}

video::-webkit-media-controls {
    display: none !important;
}

video::-webkit-media-controls-enclosure {
    display: none !important;
}

video::-webkit-media-controls-panel {
    display: none !important;
}

/* Navigation Buttons */
.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(0, 0, 0, 0.8);
    color: #fff;
    font-size: 2rem;
    width: 44px;
    height: 80px;
    cursor: pointer;
    z-index: 20;
    transition: all 0.3s ease;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: rgba(0, 0, 0, 0.9);
    color: #fff;
}

.nav-prev { left: 20px; }
.nav-next { right: 20px; }

/* Page Counter */
#page-counter {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: rgba(0, 0, 0, 0.35);
    letter-spacing: 0.1em;
}

/* Magazine Inner Bend / Spine Shadow */
.page.stf__item::after {
    content: '';
    position: absolute;
    top: 0;
    height: 100%;
    width: 50px;
    pointer-events: none;
    z-index: 2;
}

.page.stf__item.--left::after {
    right: 0;
    background: linear-gradient(to left, rgba(0, 0, 0, 0.12) 0%, rgba(0, 0, 0, 0.04) 40%, transparent 100%);
}

.page.stf__item.--right::after {
    left: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.12) 0%, rgba(0, 0, 0, 0.04) 40%, transparent 100%);
}

/* Mobile */
@media (max-width: 768px) {
    .nav-btn {
        width: 36px;
        height: 60px;
        font-size: 1.5rem;
    }
    .nav-prev { left: 6px; }
    .nav-next { right: 6px; }
    #page-counter {
        bottom: 10px;
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .nav-btn {
        display: none;
    }
}