* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #b4b4b3 100%);
    min-height: 100vh;
    padding: 40px 20px;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
}
h1 {
    text-align: center;
    color: white;
    font-size: 3em;
    margin-bottom: 50px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}
.timeline {
    position: relative;
    padding: 20px 0;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: rgba(255,255,255,0.3);
}
.milestone {
    margin-bottom: 60px;
    position: relative;
    display: flex;
    align-items: center;
}
.milestone:nth-child(odd) {
    flex-direction: row-reverse;
}
.milestone-content {
    width: 45%;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}
.milestone-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}
.milestone-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: #000000;
    border: 5px solid white;
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(75, 75, 74, 0.6);
    z-index: 10;
}
.milestone-content h2 {
    color: #000000;
    margin-bottom: 15px;
    font-size: 1.8em;
}
.milestone-content .date {
    color: #000000;
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 0.9em;
}
.milestone-content p {
    color: #555;
    line-height: 1.6;
}
.tags {
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag {
    background: linear-gradient(135deg, #000000);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85em;
}
.status {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: bold;
    margin-top: 10px;
}
.status.completed {
    background: #4caf50;
    color: white;
}
.status.in-progress {
    background: #ff9800;
    color: white;
}
.status.planned {
    background: #2196f3;
    color: white;
}
@media (max-width: 768px) {
    .timeline::before {
        left: 30px;
    }
    .milestone {
        flex-direction: row !important;
        padding-left: 60px;
    }
    .milestone-content {
        width: 100%;
    }
    .milestone-dot {
        left: 30px;
    }
    h1 {
        font-size: 2em;
    }
}
.add-milestone {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #000000;
    border: none;
    border-radius: 50%;
    font-size: 2em;
    color: #000000;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
}
.add-milestone:hover {
    transform: scale(1.1) rotate(90deg);
}

footer {
    background: var(--text-primary);
    color: rgb(0, 0, 0);
    text-align: center;
    padding: var(--spacing-xl);
    margin-top: 4rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--primary-gradient);
}