/* Variables */
:root {
    --dark-blue: #050214;
    --light-blue: #4ecfe9;
    --purple: #7e55e2;
    --light-purple: #9747FF;
    --dark-purple: #25144f;
    --text-white: #ffffff;
    --text-light: rgba(255, 255, 255, 0.8);
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition-speed: 0.3s;
    --content-width: 800px;
    --sidebar-width: 350px;
    --gap-size: 60px;
}

/* Base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--dark-blue);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Animation des étoiles */
.stars-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.stars, .stars2, .stars3 {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0)),
        radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0)),
        radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0)),
        radial-gradient(1px 1px at 130px 80px, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0)),
        radial-gradient(1px 1px at 160px 120px, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0));
    background-repeat: repeat;
    background-size: 200px 200px;
}

.stars {
    animation: sparkle 30s linear infinite;
}

.stars2 {
    background-position: 50px 50px;
    animation: sparkle 50s linear infinite;
    opacity: 0.5;
}

.stars3 {
    background-position: -50px -100px;
    animation: sparkle 70s linear infinite;
    opacity: 0.3;
}

@keyframes sparkle {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-200px);
    }
}

/* Hero Section */
.hero-section {
    height: 600px;
    position: relative;
    background-size: cover;
    background-position: center;
    width: 100%;
}

.hero-section::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    background: linear-gradient(to bottom, rgba(5, 2, 20, 0), var(--dark-blue));
}

/* Main Container */
.main-container {
    max-width: 1280px;
    margin: -200px auto 0;
    padding: 0 20px;
    position: relative;
    z-index: 5;
}

/* Two-column layout */
.article-layout {
    display: flex;
    gap: var(--gap-size);
    position: relative;
}

/* Article Content (Left Column) */
.article-content {
    flex: 0 0 var(--content-width);
    max-width: var(--content-width);
}

/* Sidebar (Right Column) */
.sidebar {
    flex: 0 0 var(--sidebar-width);
    max-width: var(--sidebar-width);
    position: sticky;
    top: 30px;
    height: fit-content;
}

/* Article Header */
.article-header {
    margin-bottom: 2rem;
}

.category-tag {
    display: inline-block;
    background-color: var(--purple);
    color: var(--text-white);
    padding: 6px 12px;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.article-title {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--text-light);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

/* Article Content */
.article-paragraph {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-light);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--purple);
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 1.4rem;
    margin: 3rem 0 1.5rem;
}

.section-title svg {
    flex-shrink: 0;
}

.article-image-container {
    margin: 2rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.article-image {
    display: block;
    width: 100%;
    border-radius: var(--border-radius);
    transition: transform var(--transition-speed) ease;
}

.article-image-container:hover .article-image {
    transform: scale(1.02);
}

/* Quote */
.article-quote {
    margin: 2.5rem 0;
    padding: 0.5rem 0 0.5rem 2rem;
    border-left: 4px solid var(--purple);
    font-size: 1.3rem;
    font-weight: 600;
    font-style: italic;
    background-color: rgba(126, 85, 226, 0.1);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* CTA Section */
.article-cta {
    background-color: var(--dark-purple);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    margin: 3rem 0;
    text-align: center;
}

.article-cta h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.article-cta p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.cta-button {
    display: inline-block;
    background-color: var(--purple);
    padding: 14px 28px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-speed) ease;
}

.cta-button:hover {
    background-color: var(--light-purple);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(126, 85, 226, 0.4);
}

/* Author Box */
.author-box {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 3rem 0;
}

.author-avatar {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-name {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.author-title {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.author-bio {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.author-social {
    display: flex;
    gap: 1rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-speed) ease;
}

.social-icon:hover {
    background-color: var(--purple);
    transform: translateY(-3px);
}

/* Other Articles */
.other-articles {
    margin-top: 4rem;
}

.other-articles-title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.article-card {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-speed) ease;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(126, 85, 226, 0.3);
}

.card-image-container {
    height: 180px;
    overflow: hidden;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-speed) ease;
}

.article-card:hover .card-image {
    transform: scale(1.05);
}

.card-content {
    padding: 1.5rem;
}

.card-tag {
    display: inline-block;
    background-color: var(--purple);
    color: var(--text-white);
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-light);
    font-size: 0.8rem;
}

/* Sidebar Cards */
.sidebar-card {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.sidebar-card-title {
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
}

/* Author Card in Sidebar */
.author-card {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.author-avatar-small {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name-small {
    font-size: 1.2rem;
    margin-bottom: 0.2rem;
}

.author-title-small {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Quick Navigation */
.quick-nav {
    list-style: none;
}

.quick-nav-item {
    margin-bottom: 1rem;
}

.quick-nav-link {
    display: flex;
    align-items: flex-start;
    position: relative;
    padding-left: 20px;
    font-size: 0.95rem;
    line-height: 1.4;
    transition: color var(--transition-speed) ease;
}

.quick-nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 8px;
    height: 8px;
    background-color: var(--purple);
    border-radius: 50%;
    transition: all var(--transition-speed) ease;
}

.quick-nav-link:hover {
    color: var(--light-purple);
}

.quick-nav-link:hover::before {
    transform: scale(1.5);
    box-shadow: 0 0 10px var(--light-purple);
}

/* CTA Card in Sidebar */
.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sidebar-button {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
}

.button-outline {
    border: 1px solid var(--purple);
    color: var(--purple);
}

.button-filled {
    background-color: var(--purple);
    color: white;
}

.sidebar-button:hover {
    transform: translateY(-3px);
}

.button-outline:hover {
    background-color: rgba(126, 85, 226, 0.1);
    border-color: var(--light-purple);
    color: var(--light-purple);
}

.button-filled:hover {
    background-color: var(--light-purple);
    box-shadow: 0 8px 15px rgba(126, 85, 226, 0.3);
}

/* Share Card */
.share-buttons {
    display: flex;
    gap: 1rem;
}

.share-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all var(--transition-speed) ease;
}

.share-button:hover {
    background-color: var(--purple);
    transform: translateY(-3px);
}

/* Animations */
[data-animation="fade-up"] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animation="fade-up"].animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1280px) {
    :root {
        --content-width: 650px;
        --sidebar-width: 300px;
        --gap-size: 40px;
    }
    
    .article-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 1024px) {
    .article-layout {
        flex-direction: column;
    }
    
    .article-content,
    .sidebar {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .sidebar {
        position: static;
        margin-top: 3rem;
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-section {
        height: 500px;
    }
    
    .main-container {
        margin-top: -150px;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.2rem;
    }
    
    .article-quote {
        font-size: 1.1rem;
        padding-left: 1.5rem;
    }
    
    .author-box {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .author-social {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .article-meta {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .article-title {
        font-size: 1.8rem;
    }
    
    .author-card {
        flex-direction: column;
        text-align: center;
    }
    
    .share-buttons {
        justify-content: center;
    }
}