.secure-body { background: var(--paper); }
.secure-header { grid-template-columns: 1fr auto 1fr; }
.secure-header .back-link { justify-self: end; }
.secure-kicker { margin: 0; color: var(--ink-soft); font-size: .75rem; font-weight: 800; letter-spacing: .14em; text-align: center; text-transform: uppercase; }

.secure-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(300px, .82fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  align-items: end;
  padding: clamp(4rem, 9vw, 8rem) clamp(1.25rem, 5vw, 5.5rem);
  background: var(--forest-deep);
  color: var(--white);
}
.secure-hero h1 { max-width: 980px; margin-bottom: 1.4rem; font-size: clamp(3rem, 6.5vw, 6.8rem); }
.secure-hero .module-intro { max-width: 760px; color: #dfe5d8; }
.secure-meta { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.8rem 0 2rem; }
.secure-meta span { padding: .45rem .72rem; border: 1px solid rgba(255,255,255,.25); color: #e5eadf; font-size: .78rem; }
.secure-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.secure-actions .button-primary { background: var(--paper); color: var(--ink); }
.secure-actions .button-outline { border-color: rgba(255,255,255,.65); color: var(--white); }
.secure-actions .button-outline:hover { background: var(--white); color: var(--ink); }
.secure-thesis { padding: clamp(1.8rem, 4vw, 3rem); border: 1px solid rgba(255,255,255,.27); }
.secure-thesis blockquote { margin: 1.2rem 0; font-family: var(--serif); font-size: clamp(1.75rem, 3vw, 2.8rem); line-height: 1.22; }
.secure-thesis p:last-child { margin: 0; color: #c8d2c2; }

.secure-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; background: var(--line); gap: 1px; border-bottom: 1px solid var(--line); }
.secure-strip li { min-height: 170px; padding: 1.6rem clamp(1.25rem, 3vw, 2.5rem); background: var(--paper); }
.secure-strip li:nth-child(2) { background: #edf0e9; }
.secure-strip li:nth-child(3) { background: #dfe5d8; }
.secure-strip span { display: block; margin-bottom: .7rem; color: var(--ink-soft); font-size: .7rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.secure-strip strong { display: block; font-family: var(--serif); font-size: 1.65rem; font-weight: 400; }
.secure-strip p { margin: .55rem 0 0; color: var(--ink-soft); }

.secure-section { padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 5vw, 5.5rem); }
.secure-heading { display: grid; grid-template-columns: 1fr .72fr; gap: 3rem; align-items: end; margin-bottom: 3rem; }
.secure-heading h2 { margin: 0; font-size: clamp(2.35rem, 4.5vw, 4.7rem); }
.secure-heading > p { max-width: 560px; margin: 0; color: var(--ink-soft); }

.architecture { background: #e8e5dc; }
.architecture-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 0; padding: 1px; list-style: none; background: var(--line); }
.architecture-flow li { min-height: 230px; padding: 1.5rem; background: var(--paper); }
.architecture-flow span { color: var(--sage); font-family: var(--serif); font-size: 1.8rem; }
.architecture-flow h3 { margin: 1.2rem 0 .7rem; font-size: 1.65rem; }
.architecture-flow p { color: var(--ink-soft); }
.architecture-flow small { display: block; margin-top: 1rem; font-weight: 750; }
.architecture-note { max-width: 980px; margin: 1.5rem 0 0; padding: 1.2rem 1.4rem; background: var(--forest-deep); color: #e3e9dd; }

.secure-roadmap { margin: 0; padding: 1px; list-style: none; background: var(--line); }
.secure-roadmap li { display: grid; grid-template-columns: 70px minmax(0, 1fr) auto; gap: 1.5rem; align-items: center; min-height: 180px; padding: clamp(1.3rem, 3vw, 2.2rem); background: var(--paper); border-bottom: 1px solid var(--line); }
.secure-roadmap li:last-child { border-bottom: 0; }
.secure-roadmap li.open-module { background: #dfe5d8; border-left: 5px solid var(--forest); }
.secure-roadmap .index { font-family: var(--serif); font-size: 2rem; color: var(--sage); }
.secure-roadmap small { color: var(--forest); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.secure-roadmap h3 { margin: .65rem 0 .4rem; font-size: clamp(1.55rem, 2.5vw, 2.35rem); }
.secure-roadmap p { max-width: 820px; margin: 0; color: var(--ink-soft); }
.locked-label { min-width: 150px; color: var(--ink-soft); font-size: .78rem; font-weight: 750; text-align: right; }

.five-risks { background: var(--forest-deep); color: var(--white); }
.five-risks .secure-heading > p { color: #cbd5c5; }
.risk-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: rgba(255,255,255,.2); }
.risk-grid article { min-height: 290px; padding: 1.35rem; background: rgba(255,255,255,.055); }
.risk-grid span { display: block; margin-bottom: 1rem; color: #bfcab9; font-family: var(--serif); font-size: 1.5rem; }
.risk-grid h3 { min-height: 3.5rem; font-size: 1.35rem; }
.risk-grid p { color: #dfe5d8; font-size: .92rem; }
.risk-grid strong { display: block; margin-top: 1rem; font-size: .82rem; }

.free-resources { background: #dfe5d8; }
.resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.resource-card { min-height: 330px; display: flex; flex-direction: column; padding: clamp(1.5rem, 3vw, 2.6rem); background: var(--paper); border-top: 4px solid var(--forest); }
.resource-card span { color: var(--forest); font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.resource-card h3 { margin: 1.2rem 0 .9rem; font-size: clamp(1.8rem, 3vw, 2.7rem); }
.resource-card p { color: var(--ink-soft); }
.resource-card a { align-self: flex-start; margin-top: auto; }

.source-list { margin: 0; padding: 0; list-style: none; }
.source-list li { border-top: 1px solid var(--line); }
.source-list li:last-child { border-bottom: 1px solid var(--line); }
.source-list a { display: grid; grid-template-columns: 170px 1fr auto; gap: 1rem; padding: 1rem 0; text-decoration: none; }
.source-list a:hover strong, .source-list a:focus-visible strong { text-decoration: underline; text-underline-offset: .3rem; }
.source-list span { color: var(--ink-soft); font-size: .8rem; }

.lesson-hero { padding: clamp(3.5rem, 7vw, 6rem) clamp(1.25rem, 5vw, 5.5rem); background: #dfe5d8; }
.lesson-hero > div { max-width: 1050px; }
.lesson-hero h1 { font-size: clamp(2.8rem, 5.6vw, 5.6rem); }
.lesson-hero p:last-child { max-width: 760px; color: var(--ink-soft); font-size: 1.08rem; }
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: clamp(2rem, 6vw, 6rem); padding: clamp(3.5rem, 7vw, 6rem) clamp(1.25rem, 5vw, 5.5rem); }
.lesson-content { max-width: 900px; }
.lesson-content section + section { margin-top: 4rem; padding-top: 4rem; border-top: 1px solid var(--line); }
.lesson-content h2 { font-size: clamp(2rem, 3.8vw, 3.7rem); }
.lesson-content h3 { margin-top: 2rem; font-size: 1.65rem; }
.lesson-content p, .lesson-content li { color: var(--ink-soft); }
.lesson-content strong { color: var(--ink); }
.lesson-nav { position: sticky; top: 110px; align-self: start; padding: 1.2rem; background: var(--cream); border-top: 4px solid var(--forest); }
.lesson-nav strong { display: block; margin-bottom: .8rem; font-family: var(--serif); font-size: 1.25rem; font-weight: 400; }
.lesson-nav a { display: block; padding: .55rem 0; border-top: 1px solid var(--line); font-size: .83rem; }
.concept-grid, .control-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: 2rem 0; background: var(--line); border: 1px solid var(--line); }
.concept-grid article, .control-grid article { min-height: 220px; padding: 1.5rem; background: var(--paper); }
.concept-grid article:last-child { background: var(--forest-deep); color: var(--white); }
.concept-grid article:last-child p { color: #dfe5d8; }
.concept-grid span, .control-grid span { color: var(--forest); font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.decision-table { width: 100%; margin: 2rem 0; border-collapse: collapse; }
.decision-table th, .decision-table td { padding: 1rem; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.decision-table th { background: var(--cream); }
.case-panel, .exercise-panel, .check-panel { margin: 2rem 0; padding: clamp(1.4rem, 3vw, 2.4rem); }
.case-panel { background: #e8e5dc; }
.exercise-panel { background: #dfe5d8; border-left: 5px solid var(--forest); }
.check-panel { background: var(--forest-deep); color: var(--white); }
.check-panel p, .check-panel li { color: #dfe5d8; }
.check-panel details { padding: 1rem 0; border-top: 1px solid rgba(255,255,255,.25); }
.check-panel summary { cursor: pointer; font-weight: 750; }
.flow-mini { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; margin: 1.5rem 0; }
.flow-mini span { padding: 1rem; background: var(--paper); border: 1px solid var(--line); font-weight: 750; text-align: center; }
.lesson-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }

.diagnostic-intro { max-width: 870px; }
.diagnostic-intro h1 { font-size: clamp(2.8rem, 5vw, 5.2rem); }
.diagnostic-note { padding: 1rem 1.2rem; background: #e8e5dc; border-left: 4px solid var(--forest); }
.controls-form { margin-top: 2rem; }
.control-group { margin: 0 0 1.25rem; padding: 0; border: 1px solid var(--line); }
.control-group legend { margin-left: 1rem; padding: 0 .4rem; font-family: var(--serif); font-size: 1.35rem; }
.control-row { display: grid; grid-template-columns: 44px minmax(0, 1fr) 180px; gap: 1rem; align-items: center; padding: 1rem 1.2rem; border-top: 1px solid var(--line); }
.control-row:first-of-type { border-top: 0; }
.control-row > span { color: var(--sage); font-family: var(--serif); font-size: 1.4rem; }
.control-row label { color: var(--ink-soft); }
.control-row label strong { display: block; color: var(--ink); }
.control-row select { min-height: 46px; padding: .65rem; border: 1px solid var(--line); background: var(--paper); color: var(--ink); font: inherit; }
.diagnostic-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 1.5rem 0; }
.diagnostic-result { min-height: 230px; padding: clamp(1.5rem, 4vw, 3rem); background: var(--forest-deep); color: var(--white); }
.diagnostic-result h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
.diagnostic-result p, .diagnostic-result li { color: #dfe5d8; }
.diagnostic-score { color: #c8d2c2; font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

@media (max-width: 1050px) {
  .risk-grid { grid-template-columns: repeat(2, 1fr); }
  .risk-grid article:last-child { grid-column: 1 / -1; min-height: auto; }
  .architecture-flow { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .secure-header { grid-template-columns: 1fr auto; }
  .secure-kicker { display: none; }
  .secure-hero, .secure-heading, .lesson-layout { grid-template-columns: 1fr; }
  .secure-strip, .resource-grid { grid-template-columns: 1fr; }
  .secure-roadmap li { grid-template-columns: 48px 1fr; }
  .secure-roadmap .button, .secure-roadmap .locked-label { grid-column: 2; justify-self: start; text-align: left; }
  .lesson-nav { position: static; order: -1; }
  .source-list a { grid-template-columns: 1fr auto; }
  .source-list span { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .secure-header .brand-line, .secure-header .brand-note { display: none; }
  .secure-header .back-link { font-size: .78rem; }
  .secure-actions { align-items: stretch; flex-direction: column; }
  .architecture-flow, .risk-grid, .concept-grid, .control-grid, .flow-mini { grid-template-columns: 1fr; }
  .risk-grid article:last-child { grid-column: auto; }
  .secure-roadmap li { grid-template-columns: 1fr; }
  .secure-roadmap .button, .secure-roadmap .locked-label { grid-column: 1; }
  .control-row { grid-template-columns: 38px 1fr; }
  .control-row select { grid-column: 2; width: 100%; }
  .decision-table { display: block; overflow-x: auto; }
}
@media print {
  .secure-header, .module-footer, .lesson-nav, .diagnostic-actions, .secure-actions { display: none !important; }
  .lesson-layout { display: block; padding: 1rem; }
  .diagnostic-result { color: #000; background: #fff; border: 1px solid #000; }
  .diagnostic-result p, .diagnostic-result li { color: #000; }
}