/* Security explainer modules. Color, type, and buttons come from layout.css. */

.sec-principles {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin: 20px 0 8px;
}

.sec-card {
    padding: 20px 18px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--bg-surface);
}

.sec-card h3 {
    margin: 0 0 10px;
    font-size: 16px;
    font-weight: 700;
    color: var(--accent);
}

.sec-card p {
    margin: 0;
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-secondary);
}

.sec-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0 8px;
}

.sec-split-col {
    padding: 18px 18px 12px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.sec-split-col.is-ok {
    background: var(--bg-surface);
}

.sec-split-col h3 {
    margin-top: 0;
}

.sec-split-col ul {
    margin-top: 8px;
}

.sec-steps {
    list-style: none;
    margin: 16px 0 0;
    padding: 0;
    counter-reset: sec-step;
}

.sec-steps li {
    position: relative;
    padding-left: 48px;
    margin-top: 16px;
}

.sec-steps li::before {
    counter-increment: sec-step;
    content: counter(sec-step);
    position: absolute;
    left: 0;
    top: 2px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    line-height: 28px;
    text-align: center;
}

.sec-related {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0 0;
}

.sec-related a {
    display: block;
    padding: 18px 20px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--bg-surface);
    color: var(--text-primary);
    font-weight: 600;
}

.sec-related a:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.sec-related span {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.7;
}

@media (max-width: 860px) {
    .sec-principles,
    .sec-split,
    .sec-related {
        grid-template-columns: 1fr;
    }
}