/* Reading-first companion to the free AI workflow lesson. */
.security-shell { max-width: 1120px; }
.security-hero { max-width: 940px; padding: 34px 0 50px; }
.security-hero h1 { font: 600 clamp(39px,5vw,62px)/1.15 var(--heading); letter-spacing: -2.5px; margin: 20px 0 24px; }
.security-deck { max-width: 770px; color: var(--muted); font-size: 19px; line-height: 1.75; }
.security-byline { display: flex; flex-wrap: wrap; gap: 5px; font-size: 13px; margin-top: 25px; }
.security-byline a { font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }
.security-byline span { flex-basis: 100%; font-size: 12px; color: var(--muted); }
.security-tags { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 11px; margin-top: 20px; color: var(--muted); }
.security-answer { display: grid; grid-template-columns: 1.15fr 1fr; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin-bottom: 52px; }
.security-answer>div,.security-definition { padding: 30px; }
.security-answer h2 { font: 600 26px/1.4 var(--heading); letter-spacing: -.8px; margin: 14px 0; }
.security-answer h3 { font: 600 19px/1.5 var(--heading); margin: 0 0 16px; }
.security-answer p { font-size: 14px; color: var(--muted); }
.security-answer p:last-child { margin-bottom: 0; }
.security-definition { background: var(--blue-soft); }
.security-reading-layout { display: grid; grid-template-columns: 240px minmax(0,1fr); gap: 60px; align-items: start; }
.security-toc { position: sticky; top: 26px; padding: 10px 0; font-size: 12px; }
.security-toc ol { margin: 20px 0 26px; padding-left: 20px; }
.security-toc li { padding-left: 4px; margin-bottom: 15px; }
.security-toc a:hover { color: var(--blue-deep); text-decoration: underline; text-underline-offset: 4px; }
.security-toc .text-link { font-size: 11px; }
.security-section { padding: 0 0 36px; margin-bottom: 38px; border-bottom: 1px solid var(--line); scroll-margin-top: 28px; }
.security-section h2,.security-checklist h2,.security-next h2,.security-faq h2 { font: 600 clamp(25px,2.7vw,32px)/1.35 var(--heading); letter-spacing: -.9px; margin: 13px 0 20px; }
.security-section p,.security-section li { font-size: 15px; line-height: 1.85; color: var(--muted); }
.security-section ul,.security-section ol { padding-left: 22px; }
.security-section li+li { margin-top: 16px; }
.security-section strong { color: var(--ink); font-weight: 600; }
.security-section a { text-decoration: underline; text-underline-offset: 4px; color: var(--blue-deep); text-decoration-thickness: 1px; }
.security-example { padding: 24px; margin: 26px 0 0; border: 1px solid #d2dff6; border-radius: 7px; background: #f5f8ff; }
.security-example h3 { font: 600 19px/1.45 var(--heading); letter-spacing: -.3px; margin: 12px 0; }
.security-example p { font-size: 14px; }
.security-example p:last-child { margin-bottom: 0; }
.security-example-compact { margin: 24px 0; }
.security-example-compact h3 { margin-top: 0; }
.security-section .security-small { font-size: 12px; }
.security-checklist { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; border: 1px solid #d2dff6; background: var(--blue-soft); padding: 34px; border-radius: 8px; margin: 8px 0 36px; scroll-margin-top: 28px; }
.security-checklist p { font-size: 14px; color: var(--muted); }
.security-checklist ol { margin: 4px 0 0; padding-left: 20px; }
.security-checklist li { font-size: 14px; padding-left: 3px; }
.security-checklist li+li { margin-top: 15px; }
.security-next { display: flex; justify-content: space-between; align-items: center; gap: 35px; padding: 32px 0 44px; border-bottom: 1px solid var(--line); }
.security-next>div { max-width: 650px; }
.security-next .button { flex-shrink: 0; font-size: 12px; }
.security-next p { font-size: 14px; color: var(--muted); margin-bottom: 0; }
.security-faq { padding: 35px 0; }
.security-faq details { padding: 18px 0; border-bottom: 1px solid var(--line); }
.security-faq summary { font-size: 15px; font-weight: 600; cursor: pointer; }
.security-faq p { max-width: 850px; font-size: 14px; color: var(--muted); }
.security-author { max-width: 850px; padding: 25px 0; }
.security-author h2 { font: 600 24px/1.4 var(--heading); letter-spacing: -.5px; margin: 14px 0; }
.security-author p { font-size: 14px; color: var(--muted); }
.security-author .text-link { font-size: 12px; margin-top: 10px; }
@media(max-width:900px) {
 .security-reading-layout { grid-template-columns: 190px minmax(0,1fr); gap: 32px; }
 .security-next { align-items: start; flex-direction: column; gap: 22px; }
}
@media(max-width:700px) {
 .security-hero { padding: 24px 0 36px; }
 .security-hero h1 { font-size: 39px; letter-spacing: -1.7px; }
 .security-deck { font-size: 16px; }
 .security-answer,.security-reading-layout,.security-checklist { grid-template-columns: 1fr; }
 .security-answer>div,.security-definition { padding: 24px; }
 .security-answer { margin-bottom: 30px; }
 .security-toc { position: static; padding: 0 0 26px; border-bottom: 1px solid var(--line); }
 .security-toc ol { margin-bottom: 20px; }
 .security-reading-layout { gap: 35px; }
 .security-section { padding-bottom: 30px; margin-bottom: 30px; }
 .security-section p,.security-section li { font-size: 14px; }
 .security-checklist { padding: 25px; gap: 15px; }
 .security-example { padding: 20px; }
 .security-next .button { width: 100%; justify-content: center; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } }