/* Timeline / Lebenslauf */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
    margin-right: 0;
    text-align: left;
    padding-left: 3rem;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: auto;
    margin-left: 0;
    text-align: right;
    padding-right: 3rem;
}

.timeline-content {
    width: 45%;
    background: var(--code-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid rgba(0, 240, 255, 0.2);
    position: relative;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 60px rgba(0, 240, 255, 0.2);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 2rem;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: 4px solid var(--dark);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
    box-shadow: 0 0 20px var(--primary);
    animation: pulse 2s ease-in-out infinite;
}

.timeline-date {
    font-family: 'JetBrains Mono', monospace;
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--light);
}

.timeline-content h4 {
    color: var(--gray);
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: flex-start;
}

.timeline-item:nth-child(even) .timeline-tags {
    justify-content: flex-end;
}

.timeline-tags span {
    font-family: 'JetBrains Mono', monospace;
    padding: 0.4rem 0.8rem;
    background: rgba(0, 240, 255, 0.1);
    color: var(--primary);
    border-radius: 6px;
    font-size: 0.75rem;
}

/* Responsive Timeline */
@media (max-width: 1024px) {
    .timeline::before {
        left: 30px;
    }

    .timeline-content {
        width: calc(100% - 80px);
        margin-left: 80px !important;
        text-align: left !important;
        padding-left: 2rem !important;
        padding-right: 2rem !important;
    }

    .timeline-dot {
        left: 30px;
        transform: translateX(-50%);
    }

    .timeline-tags {
        justify-content: flex-start !important;
    }
}

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
        padding: 1.5rem !important;
    }

    .timeline-dot {
        left: 20px;
        width: 16px;
        height: 16px;
    }

    .timeline-content h3 {
        font-size: 1.3rem;
    }

    .timeline-date {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .timeline::before {
        left: 15px;
    }

    .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px !important;
        padding: 1.2rem !important;
    }

    .timeline-dot {
        left: 15px;
        width: 14px;
        height: 14px;
        border-width: 3px;
    }

    .timeline-content h3 {
        font-size: 1.1rem;
    }

    .timeline-content h4 {
        font-size: 0.9rem;
    }

    .timeline-content p {
        font-size: 0.9rem;
    }

    .timeline-tags span {
        font-size: 0.7rem;
        padding: 0.3rem 0.6rem;
    }
}