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

body {
    background-color: #ffffff;
    font-family: 'Inter', sans-serif;
    color: #000;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* Prevent vertical scroll */
}

.nav-container {
    padding: 40px 20px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: absolute;
    /* Detach from flow for perfect carousel centering */
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
}

.back-link {
    position: absolute;
    left: 20px;
    top: 40px;
    text-decoration: none;
    color: #000;
    font-weight: 600;
    font-size: 1rem;
    transition: opacity 0.2s;
}

.back-link:hover {
    opacity: 0.7;
}

.vault-title {
    font-size: 3rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.search-container {
    width: 100%;
    max-width: 600px;
    margin-top: 10px;
    display: flex;
    gap: 15px;
    justify-content: center;
}

#vault-search {
    flex: 2;
    /* Takes more space */
    padding: 12px 20px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    border: 2px solid #eee;
    border-radius: 30px;
    background-color: #f9f9f9;
    transition: all 0.3s ease;
    text-align: center;
    outline: none;
}

#vault-search:focus {
    border-color: #000;
    background-color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Grid Layout - 4 Columns */
/* --- CAROUSEL LAYOUT --- */
.carousel-container {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    position: relative;
    /* Perfect Vertical Centering */
    flex-grow: 1;
    display: flex;
    align-items: center;
    padding: 0;
    /* Masking for fade effect on edges */
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

/* Floating Scroll Arrow */
.scroll-arrow {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    user-select: none;
}

.scroll-arrow:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.scroll-arrow.left {
    left: 30px;
    right: auto;
}

.scroll-arrow.right {
    right: 30px;
}

.scroll-arrow:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-track {
    display: flex;
    gap: 50px;
    /* Space between cards */
    width: max-content;
    /* Allow it to be as wide as needed */
    animation: scroll-left 60s linear infinite;
    animation-play-state: running;
    /* Force running */
    padding-left: 50px;
}

/* Hover Pause REMOVED per user request to keep it moving on load */
/* .carousel-container:hover .carousel-track { animation-play-state: paused; } */

.carousel-track.paused {
    animation-play-state: paused;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }

    100% {
        /* Move by 50% because we have 2 sets of cards (Original + Clone) */
        /* JS will eventually need to calculate this exact pixel width for perfect loop, 
           but for now, assuming logic: we move exactly half the track width if both sets are identical. 
           ACTUALLY: The best way is to move -50% if the track holds exactly 2 sets. */
        transform: translateX(-50%);
    }
}

/* Hover Pause on container REMOVED - now handled by JS on cards */
.carousel-track.hover-paused {
    animation-play-state: paused;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}


/* Modals removed for direct links */

/* MAIN CARD CONTAINER (Structural) */
.card {
    width: 240px;
    flex-shrink: 0;
    aspect-ratio: 2.5/3.5;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    z-index: 1;
    transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);

    /* CRITICAL: Visible overflow for subcards, NO background here */
    overflow: visible !important;
    margin: 0 auto;
    border: none;
    box-shadow: none;
    background: none !important;
}

/* BACKGROUND LAYER (Cropped) */
.card-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
    border-radius: 8px;
    background-repeat: no-repeat;
    background-position: center;
    background-color: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid #eaeaea;
}

/* RESET helper for pseudo elements used in CSS version */
.card::before,
.card::after {
    display: none;
}


/* --- ARTICLE TITLES --- */
.card-title {
    position: relative;
    z-index: 20;
    font-weight: 800;
    font-size: 1.5rem;
    text-align: center;
    padding: 20px;
    color: #000;
    text-transform: uppercase;
    letter-spacing: -0.5px;
    line-height: 1.1;
    transition: color 0.3s;
}

.card:hover .card-title {
    color: #555;
}


/* --- SHARED INTERACTION --- */

.card.faded {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.card:hover {
    transform: translateY(-5px) scale(1.05);
    /* Slight pop */
    z-index: 100;
}

/* --- MOBILE RESPONSIVENESS --- */
@media (max-width: 768px) {
    .vault-title {
        font-size: 2rem !important;
        margin-bottom: 10px;
    }
    .card {
        width: 180px !important;
    }
    .nav-container {
        padding: 20px 10px !important;
    }
    .scroll-arrow {
        width: 40px !important;
        height: 40px !important;
        font-size: 18px !important;
    }
    .scroll-arrow.left {
        left: 10px !important;
    }
    .scroll-arrow.right {
        right: 10px !important;
    }
}