.content .card {
    --card-accent: var(--border);

    position: relative;
    margin: 1rem 0;
    padding: 1.4rem 1.6rem 1.5rem;

    background: rgba(20, 20, 20, 0.85);
    border: 1px solid #1f1f1f;
    border-radius: 10px;
}

.content .card::after {
    content: "";
    display: block;
    clear: both;
}

.content .card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 1rem;
    bottom: 1rem;
    width: 3px;
    background: var(--card-accent);
    opacity: 0.65;
    border-radius: 3px;
}

.content .card > h1,
.content .card > h2,
.content .card > h3,
.content .card > h4,
.content .card > h5,
.content .card > h6 {
    margin: 0 0 0.8rem;
    padding: 0;

    font-weight: 600;
    line-height: 1.3;
}

.content .card > h1 { font-size: 1.35rem; }
.content .card > h2 { font-size: 1.15rem; }
.content .card > h3 { font-size: 1.05rem; }
.content .card > h4 { font-size: 0.95rem; }
.content .card > h5,
.content .card > h6 {
    font-size: 0.85rem;
    color: var(--muted);
}

.content .card p {
    margin: 0.7rem 0;
}

.content .card ul,
.content .card ol {
    margin: 0.7rem 0 0.7rem 1.2rem;
}

.content .card pre {
    margin: 1.1rem 0;
    background: #0f0f0f;
    border-left: 2px solid var(--card-accent);
}

.content .card + .card {
    margin-top: 3rem;
}