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

:root {
    --color-background: #ffffff;
    --color-foreground: #000000;
    --color-muted: #737373;
    --color-border: #e5e5e5;
    --color-accent: #fde047;
    --color-highlight: #bae6fd;
    --color-secondary-bg: #f7f7f7;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--color-background);
    color: var(--color-foreground);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header Styles */
.header {
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-background);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.profile-link {
    display: flex;
    align-items: center;
    transition: opacity 0.2s;
}

.profile-link:hover {
    opacity: 0.8;
}

.profile-image-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.nav-links {
    display: none;
    align-items: center;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-link {
    color: var(--color-foreground);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--color-muted);
}

/* Social Icons in Navigation */
.nav-social-icons {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: 1rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-foreground);
    transition: var(--transition);
    padding: 0.25rem;
}

.social-icon:hover {
    color: var(--color-muted);
    transform: translateY(-2px);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Button Styles */
.btn-icon {
    background: transparent;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--color-foreground);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: var(--color-secondary-bg);
}

.btn-ghost {
    background: transparent;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    color: var(--color-foreground);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    transition: var(--transition);
    display: none;
}

@media (min-width: 640px) {
    .btn-ghost {
        display: inline-block;
    }
}

.btn-ghost:hover {
    background-color: var(--color-secondary-bg);
}

.btn-primary {
    background-color: var(--color-foreground);
    color: var(--color-background);
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    transition: var(--transition);
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
}

/* Main Container */
.main-container {
    max-width: 768px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

/* Profile Section */
.profile-section {
    text-align: center;
    margin-bottom: 4rem;
}

.profile-image-wrapper {
    display: inline-block;
    margin-bottom: 1.5rem;
}

.profile-image-circle {
    width: 128px;
    height: 128px;
    border-radius: 50%;
    background-color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.profile-image {
    width: 112px;
    height: 112px;
    border-radius: 50%;
    object-fit: cover;
}

.profile-tagline {
    font-size: 1.25rem;
    color: var(--color-muted);
    margin-bottom: 2rem;
    max-width: 672px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.profile-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Blog Posts */
.blog-posts {
    margin-top: 3rem;
}

.blog-post-card {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
    margin: 0 -1rem;
}

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

.blog-post-card:hover {
    background-color: rgba(247, 247, 247, 0.3);
}

.blog-post-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.blog-post-content {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.blog-post-info {
    flex: 1;
}

.blog-post-date {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blog-post-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-foreground);
    margin-top: 0.5rem;
    line-height: 1.4;
}

.blog-post-link:hover .blog-post-title {
    text-decoration: underline;
}

.blog-post-readtime {
    font-size: 0.75rem;
    color: var(--color-muted);
    white-space: nowrap;
}

.load-more {
    text-align: center;
    margin-top: 3rem;
}

/* About Page */
.about-content {
    max-width: 768px;
}

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

.about-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-foreground);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

@media (min-width: 768px) {
    .about-title {
        font-size: 3rem;
    }
}

.about-intro {
    color: var(--color-muted);
    font-size: 1.125rem;
    line-height: 1.6;
}

.about-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-block {
    margin-bottom: 1rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-foreground);
    margin-bottom: 1rem;
}

.section-text {
    color: var(--color-foreground);
    line-height: 1.7;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.highlight-link {
    /* background-color: var(--color-highlight); */
    padding: 0 0.25rem;
    text-decoration: underline;
    color: inherit;
    transition: var(--transition);
}

.highlight-link:hover {
    text-decoration: underline;
}

.highlight-link.bold {
    font-weight: 600;
}

.highlight-text {
    text-decoration: underline;
    padding: 0 0.25rem;
}

/* Articles List */
.articles-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0 0;
}

.articles-list li {
    margin: 0.75rem 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.article-link {
    color: var(--color-foreground);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    line-height: 1.5;
}

.article-link:hover {
    color: var(--color-muted);
    text-decoration: underline;
}

.article-source {
    font-size: 0.8rem;
    color: var(--color-muted);
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 640px) {
    .nav-right {
        gap: 0.5rem;
    }
    
    .btn-primary {
        padding: 0.5rem 0.75rem;
        font-size: 0.8125rem;
    }
    
    .profile-tagline {
        font-size: 1rem;
    }
    
    .about-title {
        font-size: 2rem;
    }
}

/* Footer Styles */
.footer {
    border-top: 1px solid var(--color-border);
    background-color: var(--color-background);
    margin-top: auto;
    padding: 3rem 1.5rem 1.5rem;
}

.footer-container {
    max-width: 1024px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-foreground);
    margin-bottom: 0.5rem;
}

.footer-section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-foreground);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-description {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.5;
    margin-bottom: 1rem;
}

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

.footer-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-foreground);
    transition: var(--transition);
    padding: 0.5rem;
}

.footer-social-link:hover {
    color: var(--color-muted);
    transform: translateY(-2px);
}

.footer-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
    transition: var(--transition);
}

.footer-social-link:hover .footer-icon {
    opacity: 0.7;
    transform: translateY(-2px);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links li {
    margin: 0;
    padding: 0;
}

.footer-links a {
    color: var(--color-foreground);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-muted);
    text-decoration: underline;
}

.footer-bottom {
    max-width: 1024px;
    margin: 0 auto;
    border-top: 1px solid var(--color-border);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-copyright {
    font-size: 0.8125rem;
    color: var(--color-muted);
    margin-bottom: 0.25rem;
}

.footer-credit {
    font-size: 0.8125rem;
    color: var(--color-muted);
}

/* Responsive Design */
@media (max-width: 640px) {
    .nav-right {
        gap: 0.5rem;
    }
    
    .btn-primary {
        padding: 0.5rem 0.75rem;
        font-size: 0.8125rem;
    }
    
    .profile-tagline {
        font-size: 1rem;
    }
    
    .about-title {
        font-size: 2rem;
    }
}