:root {
    --iitk-blue: #002349;
    --iitk-gold: #e2b347;
    --light-gold: #f5e8c7;
    --light-text: #ffffff;
    --dark-text: #1a202c;
    --subtle-gray: #f9f9f9;
    --sidebar-bg: #f1f5f9;
    --image-block-bg: #e6eef6;
    --image-caption-color: #4a5568;
    --border-color: #d1d5db;
    --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.1);
    --shadow-deep: 0 10px 30px rgba(0, 0, 0, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--subtle-gray) 0%, #ffffff 100%);
    color: var(--dark-text);
    line-height: 1.7;
    /* padding-top: 135px; Match header.php header height */
    min-height: 100vh;
    transition: padding-top 0.3s;
}

body.scrolled {
    padding-top: 70px; /* Match scrolled header height */
}

#recent-post-section {
    background: linear-gradient(90deg, transparent, #d4e8fe, transparent);
    padding: 60px 0;
    margin-bottom: 50px;
    position: relative;
    z-index: 1; /* Ensure below header */
}

.recent-post-container {
    max-width: 1150px;
    margin: 0 auto;
    padding: 0 30px;
    position: relative;
    z-index: 2;
}

.recent-post-card {
    display: flex;
    background: var(--light-text);
    border-radius: 20px;
    box-shadow: var(--shadow-deep);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
    position: relative;
    border: 1px solid rgba(226, 179, 71, 0.2);
}

.recent-post-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--iitk-gold) 0%, var(--light-gold) 100%);
}

.recent-post-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.recent-post-image {
    flex: 0 0 45%;
    min-width: 0;
    background: var(--image-block-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.recent-post-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    transform: scale(1.1);
}

.recent-post-img.loaded {
    opacity: 1;
    transform: scale(1);
}

.recent-post-content {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    position: relative;
    padding-bottom: 60px;
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
}

.recent-post-content h3 {
    color: var(--iitk-blue);
    margin-bottom: 12px;
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.recent-post-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--image-caption-color);
    font-weight: 500;
}

.recent-post-meta .author,
.recent-post-meta .date {
    margin: 0;
    position: relative;
}

.recent-post-meta .author::after {
    content: "•";
    margin-left: 10px;
    color: var(--iitk-gold);
}

.recent-post-excerpt {
    color: #374151;
    margin-bottom: 20px;
    flex: 1;
    font-size: 1.1rem;
    line-height: 1.7;
    font-weight: 400;
}

.recent-post-read-more {
    position: absolute;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(135deg, var(--iitk-blue) 0%, #003a6b 100%);
    color: var(--light-text);
    padding: 12px 24px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-light);
    z-index: 10;
    line-height: 1;
    letter-spacing: 0.02em;
    border: 2px solid transparent;
}

.recent-post-read-more:hover {
    background: linear-gradient(135deg, var(--iitk-gold) 0%, #d4a843 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-deep);
    border-color: var(--iitk-gold);
}

.main-content {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 40px;
    max-width: 1350px;
    margin: 0 auto 60px;
    padding: 0 30px;
    position: relative;
    z-index: 1; /* Ensure below header */
}

@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

.sticky-sidebar {
    position: sticky;
    top: 75px; /* Header (135px) + buffer */
    height: fit-content;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--sidebar-bg) 0%, #ffffff 100%);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    color: var(--dark-text);
    backdrop-filter: blur(10px);
}

body.scrolled .sticky-sidebar {
    top: 80px; /* Scrolled header (70px) + buffer */
}

.sticky-sidebar h3 {
    color: var(--iitk-blue);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.01em;
    position: relative;
    padding-bottom: 10px;
}

.sticky-sidebar hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, var(--iitk-gold) 0%, transparent 100%);
    margin-bottom: 10px;
}

.sticky-sidebar ul {
    list-style: none;
}

.sticky-sidebar li {
    margin-bottom: 4px;
}

.sidebar-link {
    color: var(--dark-text);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 6px 16px;
    border-radius: 10px;
    display: block;
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.sidebar-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, rgba(226, 179, 71, 0.1) 0%, rgba(226, 179, 71, 0.2) 100%);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.sidebar-link:hover {
    background: linear-gradient(135deg, var(--light-gold) 0%, rgba(226, 179, 71, 0.1) 100%);
    color: var(--iitk-blue);
    transform: translateX(8px);
    border-color: var(--iitk-gold);
    box-shadow: 0 4px 12px rgba(226, 179, 71, 0.2);
}

.sidebar-link:hover::before {
    width: 100%;
}

.sidebar-link.active {
    background: linear-gradient(135deg, var(--iitk-blue) 0%, #003a6b 100%);
    color: var(--light-text);
    font-weight: 600;
    transform: translateX(8px);
    box-shadow: var(--shadow-light);
    border-color: var(--iitk-blue);
}

.blog-posts {
    padding: 20px 0;
    grid-column: 2;
    display: block; /* Ensure visible */
    z-index: 1; /* Below header */
}

.blog-post {
    display: flex;
    background: var(--light-text);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    overflow: hidden;
    margin-bottom: 40px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out forwards;
    position: relative;
    border: 1px solid var(--border-color);
}

.blog-post::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--iitk-gold) 0%, var(--light-gold) 100%);
    opacity: 1;
    transition: opacity 0.3s ease;
}

.blog-post:hover::before {
    opacity: 1;
}

.blog-post.visible {
    opacity: 1;
    transform: translateY(0);
}

.blog-post-image {
    flex: 0 0 40%;
    min-width: 0;
    background: var(--image-block-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.blog-post-img {
    width: 100%;
    height: 100%;
    object-fit: fill;
    display: block;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    transform: scale(1.05);
}

.blog-post-img.loaded {
    opacity: 1;
    transform: scale(1);
}

.blog-post-content {
    flex: 1;
    padding: 35px;
    display: flex;
    flex-direction: column;
    position: relative;
    padding-bottom: 60px;
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
}

.blog-post-title {
    color: var(--iitk-blue);
    margin-bottom: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.blog-post-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 14px;
    font-size: 0.9rem;
    color: var(--image-caption-color);
    font-weight: 500;
}

.blog-post-meta .author,
.blog-post-meta .date {
    margin: 0;
    position: relative;
}

.blog-post-meta .author::after {
    content: "•";
    margin-left: 8px;
    color: var(--iitk-gold);
}

.blog-post-excerpt {
    color: #374151;
    margin-bottom: 18px;
    flex: 1;
    font-size: 1rem;
    line-height: 1.7;
    font-weight: 400;
}

.blog-post-read-more {
    position: absolute;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(135deg, var(--iitk-blue) 0%, #003a6b 100%);
    color: var(--light-text);
    padding: 10px 20px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-light);
    z-index: 10;
    line-height: 1;
    letter-spacing: 0.02em;
    border: 2px solid transparent;
}

.blog-post-read-more:hover {
    background: linear-gradient(135deg, var(--iitk-gold) 0%, #d4a843 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-deep);
    border-color: var(--iitk-gold);
}

.no-posts {
    text-align: center;
    padding: 60px 40px;
    color: var(--image-caption-color);
    font-size: 1.3rem;
    font-weight: 500;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease-out forwards;
    background: var(--light-text);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.no-posts.visible {
    opacity: 1;
    transform: translateY(0);
}

.blog-post:hover,
.recent-post-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-deep);
    z-index: 5;
}

.blog-post-image:hover .blog-post-img,
.recent-post-image:hover .recent-post-img {
    transform: scale(1.05);
    filter: brightness(1.05) saturate(1.1);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .blog-post,
    .recent-post-card {
        flex-direction: column;
    }

    .blog-post-image,
    .recent-post-image {
        flex: 0 0 auto;
        height: 280px;
    }

    .blog-post-content,
    .recent-post-content {
        padding: 25px;
        padding-bottom: 70px;
    }

    .blog-post-read-more,
    .recent-post-read-more {
        position: static;
        margin-top: 15px;
        margin-bottom: 0;
        display: inline-block;
        align-self: flex-start;
    }

    .blog-post:hover,
    .recent-post-card:hover {
        transform: translateY(-4px);
    }

    .main-content {
        padding: 0 20px;
        gap: 30px;
    }

    .recent-post-container {
        padding: 0 20px;
    }

    .sticky-sidebar {
        position: static;
        margin-bottom: 30px;
    }
}

@media (max-width: 600px) {
    .recent-post-content h3 {
        font-size: 1.5rem;
    }

    .blog-post-title {
        font-size: 1.25rem;
    }

    .main-content {
        padding: 0 15px;
    }

    .recent-post-container {
        padding: 0 15px;
    }
}