/* 
 * Studies Learning Premium - Blog (Nebula Pulse)
 * Isolated styles with .studies-p-blog- prefix
 */

:root {
    --sp-blog-primary: #0047ff;
    --sp-blog-secondary: #00d4aa;
    --sp-blog-purple: #711900; /* As seen in legacy for business cat */
    --sp-blog-surface: #f8f9fa;
    --sp-blog-on-surface: #191c1d;
    --sp-blog-glass: rgba(255, 255, 255, 0.7);
}

/* 1. Hero Section "Nebula Pulse" */
.studies-p-blog-hero {
    position: relative;
    padding: 10rem 2rem;
    background: #020617;
    overflow: hidden;
    color: white;
}

.studies-p-blog-hero .banner-inner {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 10;
}

.studies-p-blog-glow-blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 71, 255, 0.15) 0%, transparent 70%);
    filter: blur(80px);
    border-radius: 50%;
    animation: pulseGlowBlog 10s ease-in-out infinite alternate;
}

@keyframes pulseGlowBlog {
    0% { transform: scale(1) translate(-10%, -10%); opacity: 0.5; }
    100% { transform: scale(1.2) translate(10%, 10%); opacity: 0.8; }
}

.studies-p-blog-hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 2rem;
}

.studies-p-blog-hero-title span {
    background: linear-gradient(135deg, var(--sp-blog-primary), var(--sp-blog-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.studies-p-blog-hero-robot img {
    max-width: 450px;
    width: 100%;
    animation: floatRobotBlog 6s ease-in-out infinite;
}

@keyframes floatRobotBlog {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
}

/* 2. Filter Bar */
.studies-p-blog-filters {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: -3rem auto 4rem;
    position: relative;
    z-index: 20;
    flex-wrap: wrap;
}

.studies-p-blog-filter-btn {
    padding: 0.8rem 1.8rem;
    background: white;
    border-radius: 3rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.studies-p-blog-filter-btn:hover,
.studies-p-blog-filter-btn.active {
    background: var(--sp-blog-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 71, 255, 0.2);
}

/* 3. Articles Layout */
.studies-p-blog-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
}

.studies-p-blog-featured-card {
    background: white;
    border-radius: 2rem;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
}

.studies-p-blog-featured-card:hover {
    box-shadow: 0 30px 60px rgba(15, 23, 42, 0.1);
}

.studies-p-blog-card-img {
    height: 350px;
    overflow: hidden;
    position: relative;
}

.studies-p-blog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.studies-p-blog-featured-card:hover .studies-p-blog-card-img img {
    transform: scale(1.05);
}

.studies-p-blog-cat-badge {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    padding: 0.4rem 1rem;
    background: white;
    border-radius: 2rem;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
}

/* 4. Sidebar */
.studies-p-blog-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.studies-p-blog-side-item {
    padding: 1.5rem;
    background: white;
    border-radius: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    cursor: pointer;
}

.studies-p-blog-side-item:hover {
    background: #f8fafc;
}

/* 5. Standard Grid */
.studies-p-blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1300px;
    margin: 4rem auto;
    padding: 0 2rem;
}

.studies-p-blog-card {
    background: white;
    border-radius: 1.5rem;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
}

.studies-p-blog-card:hover {
    transform: translateY(-10px);
}

/* AJAX Overlay */
.studies-p-blog-overlay {
    position: relative;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.studies-p-blog-overlay.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Mobile */
@media (max-width: 1024px) {
    .studies-p-blog-layout { grid-template-columns: 1fr; }
    .studies-p-blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .studies-p-blog-grid { grid-template-columns: 1fr; }
}