li {
    display: inherit;
}

.roadmap-wrapper {
    max-width: 700px;
    margin: 2em auto;
    background: #f8fafc;
    border-radius: 16px;
    box-shadow: 0 2px 12px #bbb;
    padding: 2em 1em;
    position: relative;
    transition: all 0.2s;
}

    .roadmap-wrapper:hover {
        box-shadow: 0 4px 24px #bbb;
        background: #f0f4f8;
    }

.roadmap-list {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
}

.roadmap-arrow {
    text-align: center;
    font-size: 2em;
    color: #b0b0b0;
    margin: 0.2em 0;
    user-select: none;
}

.roadmap-step,
.roadmap-start,
.roadmap-end {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 1px 4px #d0d0d0;
    margin: 0 auto;
    padding: 1.2em 1em;
    max-width: 500px;
    transition: box-shadow 0.2s, background 0.2s;
}

    .roadmap-step:hover {
        box-shadow: 0 2px 8px #d0d0d0;
        background: #f0f0f0;
    }

    .roadmap-start:hover {
        box-shadow: 0 2px 8px #d0d0d0;
        background: #e0ffe0;
    }

    .roadmap-end:hover {
        box-shadow: 0 2px 8px #d0d0d0;
        background: #ffe0e0;
    }

    .roadmap-step details,
    .roadmap-start,
    .roadmap-end {
        width: 100%;
    }

        .roadmap-step details[open] {
            background: #f0f6ff;
            border-radius: 10px;
        }

        .roadmap-step details summary {
            font-weight: bold;
            font-size: 1.1em;
            cursor: pointer;
            outline: none;
            transition: color 0.2s;
        }

        .roadmap-step details[open] summary {
            color: #0078d4;
        }

        .roadmap-step details .step-desc {
            margin-top: 0.7em;
            color: #333;
            padding-left: 0.5em;
        }

.roadmap-start {
    background: #e0ffe0;
    border: 2px solid #4caf50;
    font-weight: bold;
    text-align: center;
    color: #256029;
}

.roadmap-end {
    background: #ffe0e0;
    border: 2px solid #f44336;
    font-weight: bold;
    text-align: center;
    color: #7f2323;
}

p.small {
    font-size: smaller;
}