.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 40px;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 40px;
}

.timeline-marker {
    position: absolute;
    top: 20px;
    width: 50px;
    height: 50px;
    background: var(--bg-primary);
    border: 3px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-item:nth-child(odd) .timeline-marker {
    right: -25px;
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -25px;
}

.timeline-marker i {
    color: var(--primary);
    font-size: 2rem;
}

.timeline-content {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

.timeline-title {
    color: var(--text-primary);
    font-size: 2.4rem;
    margin-bottom: 10px;
}

.timeline-date {
    color: var(--primary);
    font-size: 1.4rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.timeline-content p {
    font-size: 1.6rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-xs);
}

@media (max-width: 768px) {
    .timeline {
        padding-left: 0;
        max-width: 100%;
    }

    .timeline::before {
        left: 20px;
        transform: none;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 60px !important;
        padding-right: 0 !important;
        margin-bottom: var(--spacing-md);
    }

    .timeline-marker {
        left: -5px !important;
        right: auto !important;
        width: 40px;
        height: 40px;
        top: 15px;
    }

    .timeline-marker i {
        font-size: 1.6rem;
    }

    .timeline-content {
        padding: var(--spacing-sm);
        border-radius: 12px;
    }

    .timeline-title {
        font-size: 2rem;
    }

    .timeline-date {
        font-size: 1.2rem;
    }

    .timeline-content p {
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .timeline-item {
        padding-left: 50px !important;
    }

    .timeline-marker {
        width: 35px;
        height: 35px;
    }

    .timeline-marker i {
        font-size: 1.4rem;
    }

    .timeline-content {
        padding: 15px;
    }

    .timeline-title {
        font-size: 1.8rem;
    }

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