/* ============================================================
   YouTube Shorts Slider — yss-style.css
   ============================================================ */

/* ---------- CSS Reset & Variables ---------- */
.yss-wrapper {
    --yss-accent: #e8a020;
    --yss-bg: #ffffff;
    --yss-surface: #f4f4f4;
    --yss-surface2: #e8e8e8;
    --yss-text: #111111;
    --yss-text-muted: #555555;
    --yss-card-radius: 10px;
    --yss-card-w: 180px;
    --yss-card-h: 240px;
    --yss-gap: 14px;
    --yss-nav-size: 40px;
    --yss-shadow: 0 4px 18px rgba(0,0,0,.12);
    --yss-transition: .22s cubic-bezier(.4,0,.2,1);

    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--yss-bg);
    color: var(--yss-text);
    padding: 20px 0 28px;
    position: relative;
    overflow: visible;
    box-sizing: border-box;
}

/* ---------- Dark Mode ---------- */
.yss-wrapper.yss-dark {
    --yss-bg: #0f0f0f;
    --yss-surface: #1e1e1e;
    --yss-surface2: #2a2a2a;
    --yss-text: #f1f1f1;
    --yss-text-muted: #aaaaaa;
    --yss-shadow: 0 4px 20px rgba(0,0,0,.5);
}

*, *::before, *::after {
    box-sizing: inherit;
}

/* ---------- Header ---------- */
.yss-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding: 0 8px;
}

.yss-header-bar {
    display: inline-block;
    width: 4px;
    height: 20px;
    background: var(--yss-accent);
    border-radius: 3px;
    flex-shrink: 0;
}

.yss-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--yss-text);
    line-height: 1.2;
}

/* ---------- Track Outer (holds nav + track) ---------- */
.yss-track-outer {
    display: flex;
    align-items: center;
    gap: 0;
    position: relative;
}

/* ---------- Nav Buttons ---------- */
.yss-nav {
    flex-shrink: 0;
    width: var(--yss-nav-size);
    height: var(--yss-nav-size);
    border-radius: 50%;
    border: none;
    background: var(--yss-surface);
    color: var(--yss-text);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--yss-transition), transform var(--yss-transition), opacity var(--yss-transition);
    z-index: 10;
    box-shadow: var(--yss-shadow);
    user-select: none;
    -webkit-user-select: none;
}

.yss-nav:hover {
    background: var(--yss-accent);
    color: #fff;
    transform: scale(1.08);
}

.yss-nav:disabled,
.yss-nav[data-hidden] {
    opacity: 0.35;
    pointer-events: none;
}

.yss-nav-prev { margin-right: 6px; }
.yss-nav-next { margin-left: 6px; }

/* ---------- Track Wrap (clipping container) ---------- */
.yss-track-wrap {
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* ---------- Track (the scrollable row) ---------- */
.yss-track {
    display: flex;
    gap: var(--yss-gap);
    transition: transform .38s cubic-bezier(.4,0,.2,1);
    will-change: transform;
    padding: 6px 2px 10px;
}

/* ---------- Card ---------- */
.yss-card {
    flex: 0 0 var(--yss-card-w);
    cursor: pointer;
    transition: transform var(--yss-transition);
    -webkit-tap-highlight-color: transparent;
}

.yss-card:hover {
    transform: translateY(-4px);
}

.yss-card:hover .yss-play-overlay {
    opacity: 1;
}

.yss-card:hover .yss-thumb {
    transform: scale(1.04);
}

/* ---------- Thumb Wrap ---------- */
.yss-thumb-wrap {
    position: relative;
    width: var(--yss-card-w);
    height: var(--yss-card-h);
    border-radius: var(--yss-card-radius);
    overflow: hidden;
    background: var(--yss-surface);
    box-shadow: var(--yss-shadow);
}

.yss-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .3s ease;
}

/* ---------- Play Overlay ---------- */
.yss-play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,.38);
    opacity: 0;
    transition: opacity var(--yss-transition);
}

.yss-play-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--yss-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 2px 14px rgba(0,0,0,.3);
    transition: transform var(--yss-transition);
}

.yss-card:hover .yss-play-btn {
    transform: scale(1.12);
}

/* ---------- Shorts Badge ---------- */
.yss-shorts-badge {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(0,0,0,.72);
    color: #fff;
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    padding: 3px 7px 3px 5px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* ---------- Card Title ---------- */
.yss-card-title {
    margin: 7px 0 0;
    font-size: .78rem;
    font-weight: 600;
    color: var(--yss-text);
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    padding: 0 2px;
}

/* ---------- Modal ---------- */
.yss-modal {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    transition: opacity .25s ease, visibility .25s ease;
}

.yss-modal.is-open {
    visibility: visible;
    opacity: 1;
}

.yss-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.82);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    cursor: pointer;
}

.yss-modal-content {
    position: relative;
    z-index: 1;
    width: 90vw;
    max-width: 400px;
    transform: scale(.9) translateY(20px);
    transition: transform .28s cubic-bezier(.4,0,.2,1);
}

.yss-modal.is-open .yss-modal-content {
    transform: scale(1) translateY(0);
}

.yss-modal-close {
    position: absolute;
    top: -42px;
    right: 0;
    background: rgba(255,255,255,.15);
    border: none;
    color: #fff;
    font-size: 1.5rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--yss-transition);
    line-height: 1;
}

.yss-modal-close:hover {
    background: var(--yss-accent);
}

.yss-modal-frame-wrap {
    position: relative;
    width: 100%;
    padding-bottom: 177.78%; /* 9:16 shorts ratio */
    border-radius: 14px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 10px 60px rgba(0,0,0,.5);
}

.yss-modal-iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .yss-wrapper {
        --yss-card-w: 140px;
        --yss-card-h: 190px;
        --yss-gap: 10px;
        --yss-nav-size: 32px;
    }

    .yss-title {
        font-size: .85rem;
    }

    .yss-modal-content {
        max-width: 92vw;
    }
}

@media (min-width: 1200px) {
    .yss-wrapper {
        --yss-card-w: 200px;
        --yss-card-h: 265px;
    }
}

/* ---------- Skeleton Loading ---------- */
.yss-skeleton .yss-thumb-wrap {
    background: linear-gradient(
        90deg,
        var(--yss-surface) 25%,
        var(--yss-surface2) 50%,
        var(--yss-surface) 75%
    );
    background-size: 200% 100%;
    animation: yss-shimmer 1.4s infinite;
}

@keyframes yss-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}