/* Main content */
.main-content {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.content-section {
    margin-bottom: 80px;
    scroll-margin-top: 80px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 40px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
    letter-spacing: -0.5px;
}

.section-content {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* About myself */
.about-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 800px;
}

/* My Goal*/
#goal {
    background: linear-gradient(135deg, rgba(246, 102, 118, 0.15), var(--bg-primary) 100%);
    border: 2px solid var(--accent-color);
    border-radius: 12px;
    padding: 48px 40px;
    margin: 60px 0;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

[data-theme="light"] #goal {
    background: linear-gradient(135deg, rgba(116, 174, 240, 0.1), var(--bg-primary) 100%);
}

#goal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
}

#goal:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-hover);
}

#goal .section-title {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
    margin-bottom: 32px;
}

#goal .section-content {
    position: relative;
    z-index: 1;
}

#goal .about-text {
    font-size: 20px;
    line-height: 2;
    color: var(--text-primary);
    font-weight: 500;
    max-width: 900px;
}

/* Experience */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: relative;
    padding: 20px;
}


.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
    margin-left: 20px;
}

.timeline-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    margin-left: 48px;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -56px;
    top: 28px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-color);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--border-color);
}

.timeline-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

/* Вложенный timeline внутри timeline-item */
.timeline-item .timeline {
    margin-top: 20px;
    padding: 16px 0 0 0;
    margin-left: 0;
}

.timeline-item .timeline::before {
    display: none;
}

.timeline-item .timeline .timeline-item {
    margin-left: 40px;
    padding: 20px;
    background: var(--bg-secondary);
    border-color: var(--accent-color);
    opacity: 0.8;
}

.timeline-item .timeline .timeline-item::before {
    left: -48px;
    width: 10px;
    height: 10px;
    background: var(--accent-color);
    border-width: 2px;
    box-shadow: 0 0 0 1.5px var(--accent-color);
}

.timeline-item .timeline .timeline-item:hover {
    opacity: 1;
    transform: translateX(2px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 12px;
}

.timeline-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.timeline-date {
    font-size: 14px;
    color: var(--text-tertiary);
    font-weight: 500;
    white-space: nowrap;
}

.timeline-description {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* Tags */
.tag {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

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

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.skill-category {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.skill-category-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

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

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.project-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.project-links {
    display: flex;
    gap: 8px;
}

.project-link {
    color: var(--text-secondary);
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    padding: 4px;
}

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

.project-link i {
    font-size: 18px;
}

.project-description {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* Contact */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 200px;
    justify-content: center;
}

.contact-link:hover {
    background-color: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.contact-link i {
    flex-shrink: 0;
    font-size: 20px;
}

/* Responsiveness */
@media (max-width: 768px) {
    .main-content {
        padding: 60px 0;
    }
    
    .content-section {
        margin-bottom: 60px;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 32px;
    }
    
    .timeline::before {
        margin-left: 10px;
    }
    
    .timeline-item {
        margin-left: 36px;
    }
    
    .timeline-item::before {
        left: -44px;
    }
    
    .timeline-item .timeline .timeline-item {
        margin-left: 32px;
        padding: 16px;
    }
    
    .timeline-item .timeline .timeline-item::before {
        left: -40px;
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .about-text {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 24px;
    }
    
    .timeline-item {
        padding: 20px;
    }
    
    .project-card {
        padding: 20px;
    }
    
    .contact-link {
        min-width: 100%;
    }
}