:root {
    --bg-primary: #111111;
    --bg-secondary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --border-color: #ffffff;
    --hover-bg: #222222;
    --sidebar-width: 250px;
}

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

body {
    font-family: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Roboto Mono', 'Courier New', monospace;
    font-weight: 500;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.logo {
    padding: 30px 20px;
    border-bottom: 2px solid var(--border-color);
}

.ascii-logo {
    color: var(--text-primary);
    font-size: 12px;
    line-height: 1.2;
    text-align: center;
}

.menu {
    flex: 1;
    padding: 20px 0;
}

.menu-item {
    width: 100%;
    padding: 15px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 14px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.menu-item:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

.menu-item.active {
    background-color: var(--hover-bg);
    color: var(--text-primary);
    border-left: 3px solid var(--text-primary);
}

.menu-item .icon {
    font-size: 16px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 2px solid var(--border-color);
}

.ascii-decoration {
    color: var(--text-secondary);
    font-size: 10px;
    line-height: 1.2;
    text-align: center;
}

.content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 40px;
    min-height: 100vh;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.section-title {
    font-size: 32px;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
}

.articles-grid {
    display: grid;
    gap: 20px;
}

.article-card {
    border: 2px solid var(--border-color);
    padding: 20px;
    background-color: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.article-card:hover {
    background-color: var(--hover-bg);
    transform: translateX(5px);
    box-shadow: 5px 5px 0 var(--text-secondary);
}

.article-title {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.article-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.article-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.photos-grid {
    column-count: auto;
    column-width: 300px;
    column-gap: 20px;
    column-fill: balance;
}

.photo-card {
    border: 2px solid var(--border-color);
    background-color: var(--bg-secondary);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    break-inside: avoid;
    margin-bottom: 20px;
    display: inline-block;
    width: 100%;
}

.photo-card:hover {
    transform: scale(1.02);
    box-shadow: 5px 5px 0 var(--text-secondary);
    z-index: 10;
}

.photo-card img {
    width: 100%;
    height: auto;
    display: block;
}

.photo-card:hover img {
    filter: brightness(1.1) contrast(1.1);
}

/* Photo lightbox overlay */
.photo-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
}

.photo-lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.photo-lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
    position: relative;
}

.photo-lightbox img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    filter: none;
}

.photo-lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 5px;
}

.photo-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 15px;
    cursor: pointer;
    font-family: inherit;
    font-size: 18px;
}

.photo-lightbox-prev {
    left: -60px;
}

.photo-lightbox-next {
    right: -60px;
}

.photo-lightbox-info {
    position: absolute;
    bottom: -80px;
    left: 0;
    right: 0;
    color: var(--text-secondary);
    font-size: 12px;
    text-align: center;
}

/* Mobile Navigation - Hidden on Desktop */
.mobile-header {
    display: none;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    /* Hide desktop sidebar */
    .sidebar {
        display: none;
    }
    
    /* Show mobile header */
    .mobile-header {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background-color: var(--bg-secondary);
        border-bottom: 2px solid var(--border-color);
        z-index: 1000;
    }
    
    /* Mobile navigation bar */
    .mobile-nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
    }
    
    .mobile-logo {
        font-family: inherit;
        font-size: 18px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0;
    }
    
    /* Hamburger menu */
    .mobile-menu-toggle {
        background: none;
        border: none;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        gap: 4px;
        padding: 5px;
    }
    
    .hamburger-line {
        width: 24px;
        height: 2px;
        background-color: var(--text-primary);
        transition: all 0.3s;
    }
    
    /* Hamburger animation */
    .mobile-menu-toggle.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Mobile menu dropdown */
    .mobile-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-secondary);
        border-bottom: 2px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
        display: flex;
        flex-direction: column;
    }
    
    .mobile-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-item {
        background: none;
        border: none;
        color: var(--text-primary);
        font-family: inherit;
        font-size: 14px;
        padding: 15px 20px;
        text-align: left;
        cursor: pointer;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        transition: background-color 0.2s;
        display: flex;
        align-items: center;
        gap: 10px;
        min-height: 44px; /* Touch-friendly */
    }
    
    .mobile-menu-item:hover,
    .mobile-menu-item.active {
        background-color: var(--hover-bg);
    }
    
    .mobile-menu-item .icon {
        color: var(--text-secondary);
    }
    
    /* Adjust content for mobile header */
    .content {
        margin-left: 0;
        margin-top: 70px; /* Height of mobile header */
        padding: 20px;
    }
    
    /* Section titles - smaller on mobile */
    .section-title {
        font-size: 20px;
        margin-bottom: 20px;
    }
    
    /* Photo grid mobile optimization */
    .photos-grid {
        column-width: 250px;
        column-gap: 15px;
    }
    
    .photo-card {
        margin-bottom: 15px;
    }
    
    /* Mobile lightbox improvements */
    .photo-lightbox-nav {
        position: fixed;
        top: 50%;
        transform: translateY(-50%);
        padding: 15px;
        font-size: 24px;
    }
    
    .photo-lightbox-prev {
        left: 20px;
    }
    
    .photo-lightbox-next {
        right: 20px;
    }
    
    .photo-lightbox-close {
        position: fixed;
        top: 20px;
        right: 20px;
        font-size: 28px;
        padding: 10px;
    }
    
    .photo-lightbox-info {
        position: fixed;
        bottom: 20px;
        left: 20px;
        right: 20px;
        text-align: center;
        background: rgba(0, 0, 0, 0.8);
        padding: 10px;
        border-radius: 4px;
    }
    
    /* Articles grid mobile */
    .articles-grid {
        gap: 20px;
    }
    
    .article-card {
        padding: 20px;
    }
    
    /* About section mobile */
    .about-content {
        padding: 0;
    }
    
    .profile-photo {
        width: 150px;
        margin: 0 auto 20px;
        display: block;
    }
}

.no-photos {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 40px 20px;
    border: 2px dashed var(--text-secondary);
    margin: 20px 0;
}

.about-content {
    max-width: 600px;
}

.about-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 14px;
}

.profile-photo {
    width: 200px;
    height: 200px;
    margin-bottom: 30px;
    border: 2px solid var(--border-color);
    overflow: hidden;
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: filter 0.3s;
}

.contact-section {
    margin: 40px 0;
    padding: 30px;
    border: 2px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.contact-section h3 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-weight: 600;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    background-color: var(--bg-primary);
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 14px;
}

.contact-link:hover {
    border-color: var(--text-primary);
    background-color: var(--hover-bg);
    transform: translateX(5px);
}

.contact-icon {
    font-family: inherit;
    font-size: 16px;
    color: var(--text-secondary);
    min-width: 30px;
}

.tech-note {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 30px;
    border-top: 1px dashed var(--text-secondary);
    padding-top: 20px;
}

#article-viewer {
    display: none;
}

#article-viewer.active {
    display: block;
}

.back-button {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 20px;
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
    margin-bottom: 30px;
    transition: all 0.2s;
}

.back-button:hover {
    background-color: var(--hover-bg);
    transform: translateX(-5px);
}

#article-content {
    max-width: 800px;
}

#article-content h1 {
    font-size: 28px;
    margin-bottom: 10px;
    color: #000000;
    background: #e69a33;
    padding: 8px 16px;
    border-left: 5px solid #cc7a29;
    display: inline-block;
}

#article-content .article-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

#article-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 14px;
}

#article-content h2 {
    font-size: 20px;
    margin: 30px 0 15px 0;
    color: var(--text-primary);
}

#article-content strong {
    color: #000000;
    font-weight: 600;
    background: #e69a33;
    padding: 2px 8px;
    border-left: 3px solid #cc7a29;
}

#article-content pre {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 15px;
    margin: 20px 0;
    overflow-x: auto;
    font-size: 12px;
}

#article-content code {
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    font-size: 12px;
}

#article-content img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border-color);
    margin: 20px 0;
}

.article-tags {
    margin-top: 15px;
}

.article-tags .tag {
    font-size: 11px;
    color: var(--text-secondary);
    margin-right: 10px;
    padding: 2px 6px;
    border: 1px solid var(--text-secondary);
}

.loading {
    color: var(--text-secondary);
    text-align: center;
    padding: 40px;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.error {
    color: #ff0000;
    text-align: center;
    padding: 40px;
    border: 1px solid #ff0000;
    background: rgba(255, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .content {
        margin-left: 0;
        padding: 20px;
    }
}