/* Shared lesson page styles */
.lesson-page { background: var(--bg); color: var(--ink); min-height: 100vh; }
.lesson-container { max-width: 740px; margin: 0 auto; padding: 120px 24px 80px; }

.lesson-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 56px; }
.lesson-nav a { color: var(--ink-dim); font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .14em; transition: color .2s; }
.lesson-nav a:hover { color: var(--accent); }
.lesson-progress-pill { font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-faint); padding: 6px 12px; border: 1px solid var(--rule2); }

.lesson-header { margin-bottom: 56px; padding-bottom: 40px; border-bottom: 1px solid var(--rule); }
.lesson-eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.lesson-title { font-size: clamp(1.8rem, 4.2vw, 2.8rem); font-weight: 300; line-height: 1.15; color: var(--ink); margin-bottom: 24px; }
.lesson-title em { font-style: italic; color: var(--accent); }
.lesson-lede { font-size: 1.1rem; line-height: 1.6; color: var(--ink-dim); }

.lesson-body { font-family: var(--sans); font-size: 1.05rem; line-height: 1.7; color: var(--ink-dim); }
.lesson-body h2 { font-size: 1.5rem; font-weight: 400; margin: 56px 0 20px; color: var(--ink); }
.lesson-body h3 { font-size: 1.15rem; font-weight: 500; margin: 36px 0 14px; color: var(--ink); }
.lesson-body h4 { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin: 28px 0 10px; }
.lesson-body p { margin-bottom: 20px; }
.lesson-body strong { color: var(--ink); font-weight: 500; }
.lesson-body em { color: var(--ink); }
.lesson-body ul, .lesson-body ol { margin-bottom: 20px; padding-left: 24px; }
.lesson-body li { margin-bottom: 8px; }
.lesson-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.lesson-body a:hover { color: var(--ink); }
.lesson-body blockquote { margin: 32px 0; padding: 16px 24px; border-left: 2px solid var(--accent); font-style: italic; color: var(--ink); background: rgba(79,195,161,0.04); }
.lesson-body code { font-family: var(--mono); font-size: .9em; background: rgba(255,255,255,0.04); padding: 2px 6px; border-radius: 3px; color: var(--accent); }
.lesson-body pre { font-family: var(--mono); font-size: .85em; background: var(--bg2); border: 1px solid var(--rule); padding: 18px 20px; overflow-x: auto; margin: 20px 0; line-height: 1.5; }
.lesson-body pre code { background: transparent; padding: 0; color: var(--ink); }

.lesson-table { width: 100%; border-collapse: collapse; margin: 20px 0 32px; font-size: .92rem; }
.lesson-table th { text-align: left; padding: 12px 16px; font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); border-bottom: 1px solid var(--rule2); font-weight: 500; }
.lesson-table td { padding: 14px 16px; border-bottom: 1px solid var(--rule); color: var(--ink-dim); vertical-align: top; }
.lesson-table td:first-child { color: var(--ink); }
.lesson-table tr:hover td { background: rgba(79,195,161,0.03); }

.lesson-callout { margin: 40px 0; padding: 24px 28px; border: 1px solid var(--rule2); background: var(--bg2); }
.lesson-callout-label { font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.lesson-callout p { margin: 0; color: var(--ink-dim); }

.knowledge-check { margin: 48px 0; padding: 32px; border: 1px solid var(--accent); background: rgba(79,195,161,0.04); }
.knowledge-check h3 { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin: 0 0 18px; }
.knowledge-check .kc-question { color: var(--ink); margin-bottom: 18px; font-size: 1.02rem; line-height: 1.5; }
.knowledge-check .kc-choices { display: flex; flex-direction: column; gap: 10px; margin-bottom: 0; padding: 0; list-style: none; }
.knowledge-check .kc-choice { display: flex; align-items: flex-start; gap: 12px; padding: 12px 16px; border: 1px solid var(--rule2); background: transparent; color: var(--ink-dim); text-align: left; font-size: .96rem; line-height: 1.45; font-family: var(--sans); cursor: pointer; transition: all .15s ease; width: 100%; }
.knowledge-check .kc-choice:hover:not(.locked) { border-color: var(--ink-dim); color: var(--ink); }
.knowledge-check .kc-choice .kc-marker { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); flex-shrink: 0; padding-top: 1px; min-width: 18px; }
.knowledge-check .kc-choice.correct { border-color: var(--accent); background: rgba(79,195,161,0.08); color: var(--ink); }
.knowledge-check .kc-choice.correct .kc-marker { color: var(--accent); }
.knowledge-check .kc-choice.incorrect { border-color: #ff7676; background: rgba(255,118,118,.06); color: var(--ink); }
.knowledge-check .kc-choice.incorrect .kc-marker { color: #ff7676; }
.knowledge-check .kc-choice.locked { cursor: default; }
.knowledge-check .kc-rationale { color: var(--ink-dim); font-size: .95rem; line-height: 1.6; padding: 16px 0 0; border-top: 1px solid var(--rule); margin-top: 18px; display: none; }
.knowledge-check .kc-rationale.visible { display: block; }
.knowledge-check .kc-rationale .verdict { font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; padding: 3px 8px; margin-right: 8px; display: inline-block; }
.knowledge-check .kc-rationale .verdict.correct { color: var(--accent); border: 1px solid var(--accent); }
.knowledge-check .kc-rationale .verdict.incorrect { color: #ff7676; border: 1px solid #ff7676; }
.knowledge-check .kc-rationale strong { color: var(--ink); }
.knowledge-check .kc-rationale a { color: var(--accent); }

.lesson-footer-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 80px; padding-top: 32px; border-top: 1px solid var(--rule); }
.lesson-footer-nav a { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); padding: 14px 20px; border: 1px solid var(--rule2); transition: all .2s; flex: 1; max-width: 320px; }
.lesson-footer-nav a:not(.disabled):hover { color: var(--accent); border-color: var(--accent); }
.lesson-footer-nav .next { text-align: right; }
.lesson-footer-nav .disabled { opacity: .35; pointer-events: none; }

.lesson-disclaimer { margin: 48px 0 0; padding: 24px 28px; border: 1px solid var(--rule2); background: var(--bg2); font-size: .85rem; color: var(--ink-faint); line-height: 1.6; }
.lesson-disclaimer .ld-label { font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 8px; display: block; }
.lesson-disclaimer a { color: var(--ink-dim); text-decoration: underline; }
.lesson-disclaimer a:hover { color: var(--accent); }
.lesson-disclaimer strong { color: var(--ink-dim); }

.practice-cta { margin: 48px 0; padding: 36px; border: 1px solid var(--accent); background: rgba(79,195,161,0.05); text-align: center; }
.practice-cta h3 { font-size: 1.4rem; font-weight: 400; margin-bottom: 12px; color: var(--ink); }
.practice-cta p { color: var(--ink-dim); margin-bottom: 24px; max-width: 520px; margin-inline: auto; line-height: 1.6; }
.practice-cta a { display: inline-flex; align-items: center; gap: 10px; padding: 16px 28px; font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; border: 1px solid var(--accent); color: var(--accent); transition: all .2s; }
.practice-cta a:hover { background: var(--accent); color: #0d1a15; }