:root {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-nav: linear-gradient(135deg, rgb(0, 101, 168), rgb(51, 74, 88));
    --bg-slideshow: #eee;
    
    --text-primary: #333;
    --text-secondary: #444;
    --text-meta: #555;
    --text-nav: #dce2eb;
    --text-nav-hover: #2563eb;
    --text-logo-h1: #dbe0ec;
    --text-logo-p: #dfe7f3;
    --text-hover: rgb(34, 146, 221);
    
    --border-color: rgb(34, 146, 221);
    --box-shadow: rgba(0, 0, 0, 0.05);
    --box-shadow-hover: rgba(0, 0, 0, 0.08);
    --nav-shadow: rgba(0, 0, 0, 0.08);
}

body:has(#theme-toggle:checked) {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-nav: linear-gradient(135deg, #1e3a5f, #2d3748);
    --bg-slideshow: #334155;
    
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-meta: #94a3b8;
    --text-nav: #e2e8f0;
    --text-nav-hover: #60a5fa;
    --text-logo-h1: #dbe0ec;
    --text-logo-p: #dfe7f3;
    --text-hover: #60a5fa;
    
    --border-color: #60a5fa;
    --box-shadow: rgba(0, 0, 0, 0.3);
    --box-shadow-hover: rgba(0, 0, 0, 0.5);
    --nav-shadow: rgba(0, 0, 0, 0.3);
}

.theme-checkbox {
    display: none;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: "Poppins", sans-serif;
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease;
}

* {
    box-sizing: border-box;
}

.page-title {
    text-align: center;
    color: var(--text-primary);
    font-size: 2.5rem;
    font-weight: 600;
    margin: 30px 0;
    transition: color 0.3s ease;
}

.nav {
    background: var(--bg-nav);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 50px;
    box-shadow: 0 3px 10px var(--nav-shadow);
    position: sticky;
    top: 0;
    z-index: 10;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-circle {
    background: var(--bg-nav);
    color: white;
    font-size: 1.6rem;
    border-radius: 50%;
    width: 55px;
    height: 55px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.3s;
    overflow: hidden;
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logo-circle:hover {
    transform: rotate(10deg) scale(1.1);
}

.logo-text h1 {
    margin: 0;
    font-size: 1.4rem;
    color: var(--text-logo-h1);
}

.logo-text p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-logo-p);
}

.menu {
    display: flex;
    align-items: center;
    gap: 10px;
}

.menu a {
    text-decoration: none;
    color: var(--text-nav);
    margin: 0 10px;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 6px;
    transition: 0.3s;
}

.menu a:hover {
  background-color: rgb(255, 255, 255);
  color: white,var(--text-nav-hover);
}


.menu .active {
    color: #cbd4e7;
    font-weight: 600;
}

.theme-switch {
    cursor: pointer;
    width: 50px;
    height: 26px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 10px;
    transition: background 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.theme-icon {
    display: none;
}

.theme-switch::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    left: 3px;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body:has(#theme-toggle:checked) .theme-switch::after {
    transform: translateX(24px);
}

.main-container {
    width: 90%;
    max-width: 1600px;
    margin: 20px auto;
}

.news-grid {
    display: grid;
    grid-template-columns: 3fr 4fr 3fr;
    gap: 30px; 
}

.news-column {
    display: flex;
    flex-direction: column;
    gap: 30px; 
}

.article-card {
    background: var(--bg-secondary);
    border-radius: 15px;
    box-shadow: 0 4px 12px var(--box-shadow);
    overflow: hidden; 
    transition: all 0.3s ease;
    text-align: left;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px var(--box-shadow-hover);
}

.article-content {
    padding: 20px;
}

.article-card .featured-image {
    width: 100%;
    height: auto;
    display: block;
}

.article-title {
    margin: 0 0 15px 0;
    font-size: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.3s ease;
    color: var(--text-primary);
}

.article-card-featured .article-title {
    font-size: 24px; 
}

.article-title:hover {
    color: var(--text-hover);
}

.article-meta {
    font-size: 14px;
    color: var(--text-meta);
    margin: 15px 0 0 0;
    transition: color 0.3s ease;
}

.article-divider {
    border: 0;
    height: 1px;
    background-color: var(--border-color);
    opacity: 0.5;
    margin: 15px 0 0 0;
    transition: background-color 0.3s ease;
}

.article-details {
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.6;
    transition: color 0.3s ease;
}

.show-on-hover {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.5s ease;
}

.article-card:hover .show-on-hover {
    max-height: 300px;
    opacity: 1;
}

.article-card-featured .article-details {
    max-height: 1000px;
    opacity: 1;
}

.slideshow {
    position: relative;
    width: 100%;
    height: 190px;
    overflow: hidden;
    background-color: var(--bg-slideshow);
    transition: background-color 0.3s ease;
}

.slideshow img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    animation: crossfade 21s infinite;
}

.slideshow img:nth-child(1) { animation-delay: 0s; }
.slideshow img:nth-child(2) { animation-delay: 3.5s; }
.slideshow img:nth-child(3) { animation-delay: 7s; }
.slideshow img:nth-child(4) { animation-delay: 10.5s; }
.slideshow img:nth-child(5) { animation-delay: 14s; }
.slideshow img:nth-child(6) { animation-delay: 17.5s; }

@keyframes crossfade {
    0%   { opacity: 0; }
    5%   { opacity: 1; }
    30%  { opacity: 1; }
    35%  { opacity: 0; }
    100% { opacity: 0; }
}

@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .article-card-featured {
        grid-column: 1 / -1; 
    }
}

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

    .nav {
        flex-direction: column;
        padding: 10px;
    }
    
    .menu {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
}