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

        :root {
            /* Light Mode */
            --bg-primary: #ffffff;
            --bg-secondary: #f8f8f8;
            --text-primary: #1a1a1a;
            --text-secondary: #666666;
            --accent: #2c5aa0;
            --accent-hover: #1e42a8;
            --border: #e8e8e8;
        }

        :root {
            /* Dark Mode (Default) */
            --bg-primary: #0d1117;
            --bg-secondary: #161b22;
            --text-primary: #e6edf3;
            --text-secondary: #8b949e;
            --accent: #58a6ff;
            --accent-hover: #79c0ff;
            --border: #30363d;
        }

        [data-theme="light"] {
            --bg-primary: #ffffff;
            --bg-secondary: #f8f8f8;
            --text-primary: #1a1a1a;
            --text-secondary: #666666;
            --accent: #2c5aa0;
            --accent-hover: #1e42a8;
            --border: #e8e8e8;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        /* Header & Theme Toggle */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 60px;
            padding-bottom: 30px;
            border-bottom: 1px solid var(--border);
        }

        .header-content h1 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 5px;
            letter-spacing: -0.5px;
        }

        .header-content p {
            color: var(--text-secondary);
            font-size: 16px;
            margin: 0;
        }

        .theme-toggle {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 8px 12px;
            cursor: pointer;
            font-size: 20px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
        }

        .theme-toggle:hover {
            background: var(--accent);
            color: #ffffff;
            transform: rotate(20deg);
        }

        /* Contact Section */
        .contact {
            display: flex;
            gap: 30px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

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

        .contact-item a {
            color: var(--accent);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .contact-item a:hover {
            color: var(--accent-hover);
            text-decoration: underline;
        }

        .contact-icon {
            font-size: 18px;
        }

        /* Section Styles */
        section {
            margin-bottom: 50px;
        }

        h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--text-primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 18px;
            border-left: 3px solid var(--accent);
            padding-left: 15px;
        }

        /* Experience */
        .experience-item {
            margin-bottom: 35px;
            padding-bottom: 35px;
            border-bottom: 1px solid var(--border);
        }

        .experience-item:last-child {
            border-bottom: none;
        }

        .job-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 10px;
            gap: 15px;
            flex-wrap: wrap;
        }

        .job-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .job-company {
            color: var(--accent);
            font-weight: 600;
            font-size: 16px;
        }

        .job-period {
            color: var(--text-secondary);
            font-size: 14px;
            white-space: nowrap;
        }

        .job-description {
            color: var(--text-secondary);
            margin-bottom: 12px;
            font-size: 14px;
        }

        .achievements {
            list-style: none;
            margin: 15px 0 0 0;
        }

        .achievements li {
            padding-left: 20px;
            margin-bottom: 8px;
            position: relative;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .achievements li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: bold;
        }

        /* Projects */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            min-height: 600px;
        }

        .project-card.hidden {
            display: none;
        }

        .pagination-btn {
            padding: 8px 12px;
            background: var(--bg-secondary);
            color: var(--text-primary);
            border: 1px solid var(--border);
            border-radius: 6px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .pagination-btn:hover {
            background: var(--accent);
            color: #ffffff;
            border-color: var(--accent);
        }

        .pagination-btn.active {
            background: var(--accent);
            color: #ffffff;
            border-color: var(--accent);
        }

        .project-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            padding: 20px;
            border-radius: 8px;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .project-card:hover {
            border-color: var(--accent);
            box-shadow: 0 10px 25px rgba(44, 90, 160, 0.1);
            transform: translateY(-5px);
        }

        .project-name {
            font-weight: 600;
            font-size: 16px;
            margin-bottom: 8px;
            color: var(--accent);
        }

        .project-meta {
            display: flex;
            gap: 15px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .project-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .project-photo-btn-top {
            padding: 6px 12px;
            background: var(--accent);
            color: #ffffff;
            border: none;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .project-photo-btn-top:hover {
            background: var(--accent-hover);
            transform: scale(1.08);
        }

        /* Modal Styles */
        .project-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .modal-content {
            background: var(--bg-primary);
            border-radius: 12px;
            padding: 30px;
            max-width: 800px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }

        .modal-content h3 {
            color: var(--text-primary);
            margin-bottom: 20px;
            font-size: 20px;
        }

        .modal-close {
            position: absolute;
            top: 15px;
            right: 20px;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }

        .modal-close:hover {
            color: var(--accent);
        }

        .modal-photos {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 20px;
        }

        .project-img-modal {
            width: 100%;
            height: auto;
            border-radius: 8px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            cursor: zoom-in;
        }

        .project-img-modal:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 30px rgba(88, 166, 255, 0.3);
        }

        /* Skills */
        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .skills-categories {
            display: flex;
            flex-direction: column;
            gap: 35px;
        }

        .skill-category h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 12px;
        }

        .skill-tag {
            background: rgba(88, 166, 255, 0.1);
            color: var(--accent);
            border: 1px solid var(--accent);
            padding: 10px 15px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            text-align: center;
            transition: all 0.3s ease;
        }

        .skill-tag.primary {
            background: var(--accent);
            color: #ffffff;
            border-color: var(--accent);
        }

        .skill-tag.primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(88, 166, 255, 0.2);
        }

        .skill-tag.tech:hover,
        .skill-tag.tools:hover {
            background: var(--accent);
            color: #ffffff;
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        @media (prefers-color-scheme: dark) {
            .skill-tag:not(.primary) {
                background: rgba(88, 166, 255, 0.08);
            }
        }

        @media (prefers-color-scheme: light) {
            .skill-tag:not(.primary) {
                background: rgba(44, 90, 160, 0.08);
            }
        }

        /* Stack */
        .stack-item {
            display: flex;
            justify-content: space-between;
            padding: 15px;
            background: var(--bg-secondary);
            border-radius: 6px;
            margin-bottom: 12px;
            border: 1px solid var(--border);
        }

        .stack-label {
            font-weight: 600;
            color: var(--text-primary);
        }

        .stack-value {
            color: var(--text-secondary);
            text-align: right;
        }

        /* About */
        .about-text {
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 15px;
            background: var(--bg-secondary);
            padding: 25px;
            border-radius: 8px;
            border-left: 3px solid var(--accent);
        }

        .about-text strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .project-badge {
            display: inline-block;
            background: var(--accent);
            color: #ffffff;
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

        .project-card.featured {
            border: 2px solid var(--accent);
            background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
        }

        .project-card.featured:hover {
            box-shadow: 0 15px 35px rgba(88, 166, 255, 0.15);
        }

        .project-card.featured .project-name {
            font-size: 17px;
        }

        /* Footer */
        footer {
            margin-top: 60px;
            padding-top: 30px;
            border-top: 1px solid var(--border);
            text-align: center;
            color: var(--text-secondary);
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .container {
                padding: 25px 15px;
            }

            header {
                flex-direction: column;
                text-align: center;
                gap: 15px;
                margin-bottom: 40px;
            }

            .header-content h1 {
                font-size: 24px;
            }

            h2 {
                font-size: 16px;
            }

            .job-header {
                flex-direction: column;
            }

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

            .skills-grid {
                grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
            }
        }


        /* Кнопка "Наверх" */

        @media (max-width: 768px) {
    #navSidebar { display: none; }
}

#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    display: none; /* Скрыта по умолчанию, JS сам её покажет */
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

#backToTop:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
}

/* Стили для Lightbox (просмотр на весь экран) */
.lightbox {
    display: none;
    position: fixed;
    z-index: 2000; /* Поверх всего */
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

.lightbox-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 1200px;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 4px;
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {transform:scale(0)} 
    to {transform:scale(1)}
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: var(--accent);
    text-decoration: none;
    cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: var(--accent);
    text-decoration: none;
    cursor: pointer;
}

/* Кнопки навигации в lightbox */
.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: #ffffff;
    border: none;
    font-size: 30px;
    padding: 16px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 2001;
    border-radius: 4px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--accent);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

@media (max-width: 768px) {
    .lightbox-prev,
    .lightbox-next {
        padding: 12px 16px;
        font-size: 24px;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
}