/* ==========================================================================
   allinone-importer — Public / Frontend Stylesheet
   Mobile-first, responsive, production-quality.
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (theming)
   -------------------------------------------------------------------------- */
:root {
    --rsi-yt-color:       #ff0000;
    --rsi-yt-hover:       #cc0000;
    --rsi-ig-from:        #833ab4;
    --rsi-ig-mid:         #c13584;
    --rsi-ig-to:          #fd1d1d;
    --rsi-fb-color:       #1877f2;
    --rsi-fb-hover:       #0d65d9;
    --rsi-text-primary:   #1a1a2e;
    --rsi-text-secondary: #6c757d;
    --rsi-bg-card:        #ffffff;
    --rsi-bg-wrapper:     transparent;
    --rsi-border-color:   #e9ecef;
    --rsi-radius-sm:      6px;
    --rsi-radius-md:      12px;
    --rsi-radius-lg:      16px;
    --rsi-shadow-sm:      0 1px 4px rgba(0, 0, 0, 0.06);
    --rsi-shadow-md:      0 4px 20px rgba(0, 0, 0, 0.10);
    --rsi-shadow-hover:   0 8px 32px rgba(0, 0, 0, 0.16);
    --rsi-transition:     0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --rsi-gap:            20px;
}

/* --------------------------------------------------------------------------
   Feed Wrapper
   -------------------------------------------------------------------------- */
.rsi-feed-wrapper {
    background: var(--rsi-bg-wrapper);
    width: 100%;
    margin: 0 auto;
    font-family: inherit;
}

/* --------------------------------------------------------------------------
   Error & Loading States
   -------------------------------------------------------------------------- */
.rsi-error {
    background: #fff5f5;
    border: 1px solid #feb2b2;
    border-left: 4px solid #e53e3e;
    color: #c53030;
    padding: 12px 16px;
    border-radius: var(--rsi-radius-sm);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.rsi-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    gap: 12px;
    color: var(--rsi-text-secondary);
    font-size: 0.95rem;
}

.rsi-loading::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--rsi-border-color);
    border-top-color: var(--rsi-fb-color);
    border-radius: 50%;
    animation: rsiSpinPub 0.8s linear infinite;
    flex-shrink: 0;
}

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

.rsi-no-items {
    text-align: center;
    color: var(--rsi-text-secondary);
    padding: 32px 16px;
    font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Filter Tabs
   -------------------------------------------------------------------------- */
.rsi-filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--rsi-border-color);
}

.rsi-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border: 2px solid var(--rsi-border-color);
    border-radius: 999px;
    background: transparent;
    color: var(--rsi-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition:
        background var(--rsi-transition),
        color var(--rsi-transition),
        border-color var(--rsi-transition),
        box-shadow var(--rsi-transition);
    line-height: 1;
    white-space: nowrap;
}

.rsi-tab-btn:hover {
    border-color: var(--rsi-text-primary);
    color: var(--rsi-text-primary);
}

.rsi-tab-btn:focus-visible {
    outline: 3px solid var(--rsi-fb-color);
    outline-offset: 2px;
}

.rsi-tab-btn.rsi-tab-active,
.rsi-tab-btn[aria-selected="true"] {
    background: var(--rsi-text-primary);
    border-color: var(--rsi-text-primary);
    color: #ffffff;
    box-shadow: var(--rsi-shadow-sm);
}

/* --------------------------------------------------------------------------
   Grid Layout
   -------------------------------------------------------------------------- */
.rsi-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--rsi-gap);
    transition: opacity var(--rsi-transition);
}

/* 2 columns at ≥ 600 px */
@media (min-width: 600px) {
    .rsi-grid-cols-2,
    .rsi-grid-cols-3,
    .rsi-grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 3 columns at ≥ 900 px */
@media (min-width: 900px) {
    .rsi-grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    .rsi-grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 4 columns at ≥ 1200 px */
@media (min-width: 1200px) {
    .rsi-grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Feed-item card
   -------------------------------------------------------------------------- */
.rsi-card {
    background: var(--rsi-bg-card);
    border-radius: var(--rsi-radius-md);
    box-shadow: var(--rsi-shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition:
        transform var(--rsi-transition),
        box-shadow var(--rsi-transition),
        opacity var(--rsi-transition);
    will-change: transform, box-shadow;
    border: 1px solid var(--rsi-border-color);
}

.rsi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--rsi-shadow-hover);
}

/* Hidden cards (filtered out) */
.rsi-card.rsi-hidden {
    display: none;
}

/* Fade-in when appearing */
.rsi-card.rsi-visible {
    animation: rsiCardIn 0.3s ease both;
}

@keyframes rsiCardIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Thumbnail
   -------------------------------------------------------------------------- */
.rsi-card-thumbnail-link {
    display: block;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.rsi-card-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background: #f0f0f0;
    overflow: hidden;
}

.rsi-card-thumbnail img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    display: block;
}

.rsi-card:hover .rsi-card-thumbnail img {
    transform: scale(1.06);
}

/* Placeholder when no image */
.rsi-thumbnail-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #c0c0c0;
    background: #f0f0f0;
}

.rsi-thumbnail-placeholder svg {
    width: 48px;
    height: 48px;
}

/* --------------------------------------------------------------------------
   Play Button Overlay
   -------------------------------------------------------------------------- */
.rsi-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 52px;
    height: 52px;
    background: rgba(0, 0, 0, 0.65);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--rsi-transition), transform var(--rsi-transition);
    pointer-events: none;
    z-index: 2;
}

.rsi-play-btn svg {
    width: 22px;
    height: 22px;
    margin-left: 4px; /* optical centering of the triangle */
}

.rsi-card:hover .rsi-play-btn {
    background: rgba(255, 0, 0, 0.85);
    transform: translate(-50%, -50%) scale(1.1);
}

/* --------------------------------------------------------------------------
   Platform Badge
   -------------------------------------------------------------------------- */
.rsi-platform-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 3;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #ffffff;
    pointer-events: none;
    line-height: 1.6;
}

.rsi-badge-youtube   { background: var(--rsi-yt-color); }
.rsi-badge-instagram { background: linear-gradient(90deg, var(--rsi-ig-from), var(--rsi-ig-to)); }
.rsi-badge-facebook  { background: var(--rsi-fb-color); }

/* --------------------------------------------------------------------------
   Card Body
   -------------------------------------------------------------------------- */
.rsi-card-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.rsi-card-title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--rsi-text-primary);
    line-height: 1.4;
    /* 2-line clamp */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.rsi-card-date {
    display: block;
    font-size: 0.78rem;
    color: var(--rsi-text-secondary);
    margin-top: auto;
}

/* --------------------------------------------------------------------------
   CTA Button
   -------------------------------------------------------------------------- */
.rsi-btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: var(--rsi-radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition:
        background var(--rsi-transition),
        color var(--rsi-transition),
        transform var(--rsi-transition);
    align-self: flex-start;
    margin-top: 4px;
    line-height: 1.4;
    cursor: pointer;
}

.rsi-btn:focus-visible {
    outline: 3px solid currentColor;
    outline-offset: 2px;
}

.rsi-btn:active {
    transform: scale(0.97);
}

.rsi-btn-youtube {
    background: var(--rsi-yt-color);
    color: #ffffff;
}

.rsi-btn-youtube:hover {
    background: var(--rsi-yt-hover);
    color: #ffffff;
}

.rsi-btn-instagram {
    background: linear-gradient(90deg, var(--rsi-ig-from), var(--rsi-ig-to));
    color: #ffffff;
}

.rsi-btn-instagram:hover {
    opacity: 0.9;
    color: #ffffff;
}

.rsi-btn-facebook {
    background: var(--rsi-fb-color);
    color: #ffffff;
}

.rsi-btn-facebook:hover {
    background: var(--rsi-fb-hover);
    color: #ffffff;
}

/* --------------------------------------------------------------------------
   Smooth filter transition
   -------------------------------------------------------------------------- */
.rsi-grid--filtering {
    opacity: 0.4;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Accessibility: reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    .rsi-card,
    .rsi-card-thumbnail img,
    .rsi-play-btn,
    .rsi-btn,
    .rsi-tab-btn,
    .rsi-grid {
        transition: none;
    }

    .rsi-card:hover {
        transform: none;
    }

    .rsi-card.rsi-visible {
        animation: none;
    }
}