/* ============================================================
   EduzPlus — Homepage Styles (Light / White Theme)
   Banner Slider + Recent Posts Grid with Infinite Scroll
   Uses theme variables: --eduzplus-primary, --eduzplus-theme, etc.
   ============================================================ */

/* ─── Google Font Import ─── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ─── Force Light Theme for Homepage ─── */
.site-main {
    background: #ffffff;
    color: #1e293b;
}

/* ─── Banner Slider ─── */
.eduzplus-banner {
    position: relative;
    width: 100%;
    height: 85vh;
    min-height: 500px;
    max-height: 800px;
    overflow: hidden;
    background: #1a1a2e;
}

.eduzplus-banner-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.eduzplus-banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s 1s;
    z-index: 1;
}

.eduzplus-banner-slide.active {
    opacity: 1;
    visibility: visible;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s 0s;
    z-index: 2;
}

.eduzplus-banner-slide-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: brightness(0.55);
    transform: scale(1.05);
    transition: transform 8s ease-out;
}

.eduzplus-banner-slide.active .eduzplus-banner-slide-image {
    transform: scale(1);
}

/* Gradient overlay for readability */
.eduzplus-banner-overlay {
    position: absolute;
    inset: 0;
    z-index: 3;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.1) 0%,
        rgba(0, 0, 0, 0.25) 50%,
        rgba(0, 0, 0, 0.65) 100%
    );
    pointer-events: none;
}

/* Decorative accent glow from theme color */
.eduzplus-banner-glow {
    position: absolute;
    bottom: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 120%;
    height: 80%;
    background: radial-gradient(ellipse at center, var(--eduzplus-primary, #0056b3) 0%, transparent 70%);
    opacity: 0.12;
    z-index: 3;
    pointer-events: none;
}

/* Slide content */
.eduzplus-banner-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 5;
    padding: 0 2rem 4rem;
    max-width: var(--eduzplus-container-width, 1200px);
    margin: 0 auto;
    color: #ffffff;
}

.eduzplus-banner-category {
    display: inline-block;
    padding: 5px 16px;
    background: var(--eduzplus-primary, #0056b3);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: 30px;
    margin-bottom: 16px;
    text-decoration: none;
    transition: background 0.3s, transform 0.3s;
    opacity: 0;
    transform: translateY(20px);
    animation: none;
}

.eduzplus-banner-slide.active .eduzplus-banner-category {
    animation: bannerFadeUp 0.7s 0.3s ease forwards;
}

.eduzplus-banner-category:hover {
    background: #0f172a;
    color: #fff;
    transform: translateY(-2px);
}

.eduzplus-banner-title {
    font-family: var(--eduzplus-font-primary, 'Inter', sans-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin: 0 0 16px;
    color: #ffffff;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    max-width: 750px;
    opacity: 0;
    transform: translateY(30px);
}

.eduzplus-banner-slide.active .eduzplus-banner-title {
    animation: bannerFadeUp 0.8s 0.45s ease forwards;
}

.eduzplus-banner-title a {
    color: #ffffff;
    text-decoration: none;
    transition: opacity 0.3s;
}

.eduzplus-banner-title a:hover {
    opacity: 0.85;
    color: #ffffff;
}

.eduzplus-banner-excerpt {
    font-size: 1.05rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 0 24px;
    opacity: 0;
    transform: translateY(20px);
}

.eduzplus-banner-slide.active .eduzplus-banner-excerpt {
    animation: bannerFadeUp 0.7s 0.6s ease forwards;
}

.eduzplus-banner-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--eduzplus-primary, #0056b3);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 8px 30px rgba(0, 86, 179, 0.4);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.eduzplus-banner-slide.active .eduzplus-banner-cta {
    animation: bannerFadeUp 0.7s 0.75s ease forwards;
}

.eduzplus-banner-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 86, 179, 0.6);
    background: var(--eduzplus-primary, #0056b3);
    filter: brightness(1.1);
    color: #fff;
}

.eduzplus-banner-cta svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transition: transform 0.3s;
}

.eduzplus-banner-cta:hover svg {
    transform: translateX(4px);
}

@keyframes bannerFadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Banner Navigation Controls ─── */
.eduzplus-banner-nav {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 12px;
}

.eduzplus-banner-dots {
    display: flex;
    gap: 8px;
    align-items: center;
}

.eduzplus-banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.4s ease;
    position: relative;
}

.eduzplus-banner-dot.active {
    background: #ffffff;
    width: 32px;
    border-radius: 20px;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

.eduzplus-banner-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.eduzplus-banner-arrow:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.08);
}

.eduzplus-banner-arrow svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ─── Progress Bar ─── */
.eduzplus-banner-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10;
    background: rgba(255, 255, 255, 0.1);
}

.eduzplus-banner-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--eduzplus-primary, #0056b3);
    transition: width 0.1s linear;
    border-radius: 0 3px 3px 0;
}

/* ─── Static Banner (single or no slides) ─── */
.eduzplus-banner--static {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    height: 60vh;
    min-height: 400px;
    text-align: center;
}

.eduzplus-banner--static .eduzplus-banner-content {
    position: relative;
    bottom: auto;
    text-align: center;
    padding: 2rem;
}

.eduzplus-banner--static .eduzplus-banner-title {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #ffffff;
}

/* ─── RECENT POSTS SECTION ─── */
.eduzplus-recent-section {
    padding: 5rem 2rem;
    max-width: var(--eduzplus-container-width, 1200px);
    margin: 0 auto;
    background: #ffffff;
}

.eduzplus-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.eduzplus-section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--eduzplus-primary, #0056b3);
    margin-bottom: 8px;
}

.eduzplus-section-label::before {
    content: '';
    display: inline-block;
    width: 28px;
    height: 3px;
    background: var(--eduzplus-primary, #0056b3);
    border-radius: 10px;
}

.eduzplus-section-title {
    font-family: var(--eduzplus-font-primary, 'Inter', sans-serif);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: #0f172a;
    margin: 0;
    line-height: 1.2;
}

.eduzplus-view-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--eduzplus-primary, #0056b3);
    text-decoration: none;
    padding: 10px 20px;
    border: 2px solid var(--eduzplus-primary, #0056b3);
    border-radius: 50px;
    transition: all 0.3s ease;
}

.eduzplus-view-all:hover {
    background: var(--eduzplus-primary, #0056b3);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 86, 179, 0.3);
}

.eduzplus-view-all svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.3s;
}

.eduzplus-view-all:hover svg {
    transform: translateX(4px);
}

/* ─── Posts Grid ─── */
.eduzplus-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

/* ─── Post Card — Light Theme ─── */
.eduzplus-post-card {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    position: relative;
}

.eduzplus-post-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    border-color: var(--eduzplus-primary, #0056b3);
}

/* Card Image */
.eduzplus-card-image {
    position: relative;
    width: 100%;
    padding-top: 60%;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
}

.eduzplus-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.eduzplus-post-card:hover .eduzplus-card-image img {
    transform: scale(1.08);
}

/* Gradient overlay on image */
.eduzplus-card-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.12), transparent);
    pointer-events: none;
    z-index: 1;
}

/* Card floating category */
.eduzplus-card-category {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    display: inline-block;
    padding: 4px 14px;
    background: var(--eduzplus-primary, #0056b3);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border-radius: 20px;
    text-decoration: none;
    transition: background 0.3s;
}

.eduzplus-card-category:hover {
    background: #0f172a;
    color: #fff;
}

/* No image fallback */
.eduzplus-card-no-image {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: #cbd5e1;
}

.eduzplus-card-no-image svg {
    width: 48px;
    height: 48px;
    fill: currentColor;
}

/* Card Body */
.eduzplus-card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
    background: #ffffff;
}

.eduzplus-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: #64748b;
    margin-bottom: 10px;
}

.eduzplus-card-meta-author {
    font-weight: 600;
    color: #334155;
}

.eduzplus-card-meta-dot {
    color: #cbd5e1;
}

.eduzplus-card-title {
    font-family: var(--eduzplus-font-primary, 'Inter', sans-serif);
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.35;
    margin: 0 0 10px;
    color: #0f172a;
}

.eduzplus-card-title a {
    color: #0f172a;
    text-decoration: none;
    transition: color 0.3s;
}

.eduzplus-card-title a:hover {
    color: var(--eduzplus-primary, #0056b3);
}

.eduzplus-card-excerpt {
    font-size: 14px;
    line-height: 1.6;
    color: #64748b;
    margin-bottom: 1.25rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.eduzplus-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid #f1f5f9;
}

.eduzplus-read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--eduzplus-primary, #0056b3);
    text-decoration: none;
    transition: gap 0.3s;
}

.eduzplus-read-more:hover {
    gap: 10px;
    color: var(--eduzplus-primary, #0056b3);
}

.eduzplus-read-more svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.eduzplus-read-time {
    font-size: 12px;
    color: #94a3b8;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

.eduzplus-read-time svg {
    width: 14px;
    height: 14px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ─── Stagger animation for initial cards (CSS-only, no JS needed) ─── */
.eduzplus-post-card {
    opacity: 0;
    transform: translateY(30px);
    animation: cardReveal 0.6s ease forwards;
}

.eduzplus-post-card:nth-child(1) { animation-delay: 0.1s; }
.eduzplus-post-card:nth-child(2) { animation-delay: 0.2s; }
.eduzplus-post-card:nth-child(3) { animation-delay: 0.3s; }
.eduzplus-post-card:nth-child(4) { animation-delay: 0.4s; }
.eduzplus-post-card:nth-child(5) { animation-delay: 0.5s; }
.eduzplus-post-card:nth-child(6) { animation-delay: 0.6s; }

/* Lazy-loaded cards — start hidden, animate when scrolled into view */
.eduzplus-post-card.eduzplus-lazy-card {
    animation: none;
    opacity: 0;
    transform: translateY(30px);
}

.eduzplus-post-card.eduzplus-lazy-card.eduzplus-visible {
    animation: cardReveal 0.6s ease forwards;
}

.eduzplus-post-card.eduzplus-lazy-card.eduzplus-visible:nth-child(3n+1) { animation-delay: 0.1s; }
.eduzplus-post-card.eduzplus-lazy-card.eduzplus-visible:nth-child(3n+2) { animation-delay: 0.2s; }
.eduzplus-post-card.eduzplus-lazy-card.eduzplus-visible:nth-child(3n+3) { animation-delay: 0.3s; }

@keyframes cardReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Lazy Load Trigger & Spinner ─── */
.eduzplus-load-trigger {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    min-height: 60px;
}

.eduzplus-load-spinner {
    display: none;
    width: 40px;
    height: 40px;
    border: 3px solid #e2e8f0;
    border-top-color: var(--eduzplus-primary, #0056b3);
    border-radius: 50%;
    animation: eduzSpin 0.7s linear infinite;
}

.eduzplus-load-trigger.loading .eduzplus-load-spinner {
    display: block;
}

.eduzplus-load-end {
    display: none;
    font-size: 14px;
    font-weight: 600;
    color: #94a3b8;
    text-align: center;
    letter-spacing: 0.5px;
}

.eduzplus-load-trigger.finished .eduzplus-load-end {
    display: block;
}

.eduzplus-load-trigger.finished .eduzplus-load-spinner {
    display: none;
}

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

/* ─── Empty State ─── */
.eduzplus-empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #94a3b8;
}

.eduzplus-empty-state svg {
    width: 64px;
    height: 64px;
    fill: none;
    stroke: #cbd5e1;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    margin-bottom: 1rem;
}

.eduzplus-empty-state p {
    font-size: 1.1rem;
    max-width: 400px;
    margin: 0 auto;
    color: #64748b;
}

/* ─── Responsive Adjustments ─── */
@media (max-width: 1024px) {
    .eduzplus-posts-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .eduzplus-banner {
        height: 70vh;
        min-height: 400px;
    }

    .eduzplus-banner-content {
        padding: 0 1.25rem 3rem;
    }

    .eduzplus-banner-nav {
        bottom: 1.5rem;
        right: 1.25rem;
        gap: 8px;
    }

    .eduzplus-banner-arrow {
        width: 38px;
        height: 38px;
    }

    .eduzplus-banner-arrow svg {
        width: 16px;
        height: 16px;
    }

    .eduzplus-banner-dot {
        width: 8px;
        height: 8px;
    }

    .eduzplus-banner-dot.active {
        width: 24px;
    }

    .eduzplus-recent-section {
        padding: 3rem 1.25rem;
    }

    .eduzplus-section-header {
        margin-bottom: 2rem;
    }

    .eduzplus-posts-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .eduzplus-card-image {
        padding-top: 55%;
    }
}

@media (max-width: 480px) {
    .eduzplus-banner {
        height: 65vh;
        min-height: 350px;
    }

    .eduzplus-banner-content {
        padding: 0 1rem 2.5rem;
    }

    .eduzplus-banner-excerpt {
        display: none;
    }

    .eduzplus-banner-cta {
        padding: 12px 24px;
        font-size: 14px;
    }
}