/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #60a5fa;
    --primary-hover: #93c5fd;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --border-color: #262626;
    --accent-color: #3b82f6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.nav {
    background-color: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    letter-spacing: 0.01em;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    width: 100%;
    border-bottom: 1px solid var(--border-color);
}

.hero-image-container {
    width: 100%;
    max-height: 250px;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background-color: var(--bg-secondary);
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: top;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 1rem;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
}

/* Article Index Controls */
.article-index {
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.article-search {
    margin-bottom: 1.5rem;
}

.search-input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.article-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.filter-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: var(--bg-primary);
    border-color: var(--primary-color);
}

.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.article-count {
    display: flex;
    justify-content: flex-end;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

/* About Section */
.about {
    margin-top: -70px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 4rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: 4rem;
    align-items: flex-start;
}

.about-profile {
    flex-shrink: 0;
}

.profile-image {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    filter: grayscale(10%);
    border-radius: 50%;
}

.profile-image-container {
    border-radius: 50%;
}

.about-text {
    margin-top: 80px;
    flex: 1;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: 1.5rem;
}

.about-more {
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.4s ease;
    opacity: 1;
}

.about-more.hidden {
    max-height: 0;
    opacity: 0;
}

.about-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem 0;
    margin-top: 1rem;
    transition: color 0.3s ease;
    font-family: inherit;
}

.about-toggle:hover {
    color: var(--primary-hover);
}

.about-toggle:focus {
    outline-offset: 4px;
}

/* Articles Section */
.articles {
    padding: 6rem 0;
    background-color: var(--bg-primary);
}

.articles-grid {
    display: flex;
    flex-direction: column;
    gap: 1px;
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
}

.article-card {
    background-color: var(--bg-secondary);
    transition: background-color 0.2s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.article-card:last-child {
    border-bottom: none;
}

.article-card:hover {
    background-color: var(--bg-tertiary);
}

.article-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    margin-bottom: 1rem;
}

.article-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.article-image-placeholder {
    font-size: 3rem;
    font-weight: 600;
    color: var(--text-muted);
}

.article-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    order: 2;
}

.article-tag {
    color: var(--text-muted);
    font-weight: 400;
}

.article-date {
    display: flex;
    align-items: center;
}

.article-title {
    font-size: 1.35rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
    letter-spacing: -0.01em;
    order: 1;
}

.article-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    order: 3;
}

.article-link {
    display: none;
}

.external-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    order: 4;
}

/* Article Page */
.article-page {
    padding: 3rem 0;
    min-height: 70vh;
}

.article-container {
    max-width: 800px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 2rem;
    transition: transform 0.2s;
}

.back-link:hover {
    transform: translateX(-4px);
}

.article-header {
    margin-bottom: 3rem;
}

.article-header .article-title {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.article-header .article-meta {
    font-size: 1rem;
}

.article-body {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-body h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.article-body h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.article-body p {
    margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-body code {
    font-family: 'JetBrains Mono', monospace;
    background-color: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

.article-body pre {
    background-color: var(--text-primary);
    color: white;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.article-body pre code {
    background: none;
    padding: 0;
}

.article-body blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* Projects Section */
.projects {
    padding: 6rem 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.project-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.project-stars {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.project-stars svg {
    color: #fbbf24;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tag {
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

.project-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.project-link:hover {
    color: var(--primary-color);
}

.project-link svg {
    width: 16px;
    height: 16px;
}

/* Footer */
.footer {
    background-color: var(--bg-primary);
    color: var(--text-muted);
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--text-primary);
}

.nav {
    padding: 0 2rem;
}
.about {
    padding: 0 2rem;
}
.articles {
    padding: 0 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .nav-content {
        padding: 1rem 0;
    }

    .nav-links {
        gap: 1.5rem;
        font-size: 0.85rem;
    }

    .logo {
        font-size: 1rem;
    }

    .hero-image-container {
        max-height: 180px;
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: 2rem;
    }

    /* About Section Mobile */
    .about {
        padding: 3rem 0;
    }

    .about-content {
        flex-direction: column;
        gap: 2rem;
        align-items: center;
    }

    .about-text {
        margin-top: 0;
    }

    .profile-image {
        width: 180px;
        height: 180px;
    }

    .about-text {
        font-size: 1rem;
    }

    .about-intro {
        font-size: 1.1rem;
    }

    /* Article Index Mobile */
    .article-index {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }

    .article-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .search-input {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    /* Articles Grid Mobile */
    .articles {
        padding: 3rem 0;
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .article-card {
        border-radius: 12px;
    }

    .article-image {
        height: 200px;
    }

    .article-content {
        padding: 1.5rem;
    }

    .article-title {
        font-size: 1.25rem;
        line-height: 1.4;
    }

    .article-excerpt {
        font-size: 0.95rem;
        margin-bottom: 1rem;
    }

    .article-meta {
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 1rem;
    }

    .article-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    .article-date {
        font-size: 0.8rem;
    }

    /* Projects Grid Mobile */
    .projects {
        padding: 3rem 0;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .project-card {
        padding: 1.5rem;
        border-radius: 12px;
    }

    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .project-name {
        font-size: 1.25rem;
    }

    .project-description {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .project-tags {
        gap: 0.4rem;
    }

    .project-tag {
        font-size: 0.75rem;
        padding: 0.25rem 0.6rem;
    }

    .project-links {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .project-link {
        font-size: 0.85rem;
    }

    /* Footer Mobile */
    .footer {
        padding: 2rem 0;
    }

    .footer .container {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .footer-links {
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .nav-content {
        gap: 0.75rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.8rem;
    }

    .hero-image-container {
        max-height: 150px;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    /* About Section Small Mobile */
    .about {
        padding: 2rem 0;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .about-text {
        font-size: 0.95rem;
    }

    .about-intro {
        font-size: 1rem;
    }

    /* Article Index Small Mobile */
    .article-index {
        padding: 1rem;
    }

    .filter-btn {
        padding: 0.35rem 0.7rem;
        font-size: 0.75rem;
    }

    .article-count {
        font-size: 0.8rem;
    }

    /* Articles Small Mobile */
    .articles {
        padding: 2rem 0;
    }

    .articles-grid {
        gap: 1.5rem;
    }

    .article-image {
        height: 180px;
    }

    .article-content {
        padding: 1.25rem;
    }

    .article-title {
        font-size: 1.1rem;
    }

    .article-excerpt {
        font-size: 0.9rem;
    }

    /* Projects Small Mobile */
    .projects {
        padding: 2rem 0;
    }

    .projects-grid {
        gap: 1.5rem;
    }

    .project-card {
        padding: 1.25rem;
    }

    .project-name {
        font-size: 1.15rem;
    }

    .project-description {
        font-size: 0.9rem;
    }
}

/* Loading State */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}