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64px);margin:0 auto;padding:68px 0 100px}.page-header{max-width:850px;margin-bottom:50px}.page-header h1{margin:10px 0 24px}.page-header>p:not(.eyebrow):not(.page-header__phase){max-width:680px;color:var(--body);font-size:1.08rem}.page-header__phase{color:var(--accent)}.week-grid{border-top:1px solid var(--border-strong);border-left:1px solid var(--border-strong);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.week-card{border-right:1px solid var(--border-strong);border-bottom:1px solid var(--border-strong);background:var(--surface);flex-direction:column;min-height:300px;padding:28px;display:flex}.week-card__meta{color:var(--muted);justify-content:space-between;display:flex}.week-card h2{margin:34px 0 12px;font-size:1.7rem}.week-card__phase{color:var(--accent)}.week-card p:not(.week-card__phase){color:var(--body)}.week-card a{border-bottom:1px solid var(--accent);width:fit-content;color:var(--accent);font-family:var(--font-mono), monospace;text-transform:uppercase;margin-top:auto;font-size:.7rem}.structure-notice{border:1px solid var(--border-strong);background:var(--surface);max-width:760px;padding:30px}.structure-notice h2{margin:10px 0 14px;font-size:2rem}.structure-notice p:not(.eyebrow){color:var(--body)}.not-found{align-content:center;width:min(760px,100% - 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64px);margin:0 auto;padding:34px 0 110px}.week-overview[data-week-tone=gold]{--accent:var(--tone-gold)}.week-overview[data-week-tone=green]{--accent:var(--tone-green)}.week-overview[data-week-tone=sky]{--accent:var(--tone-sky)}.week-overview[data-week-tone=coral]{--accent:var(--tone-coral)}.week-overview[data-week-tone=violet]{--accent:var(--tone-violet)}.week-overview[data-week-tone=rose]{--accent:var(--tone-rose)}.week-overview__back{border-bottom:1px solid var(--border-strong);color:var(--muted);font-family:var(--font-mono), monospace;letter-spacing:.08em;text-transform:uppercase;margin-bottom:34px;font-size:.66rem;display:inline-block}.week-overview__back:hover{color:var(--text);border-color:var(--accent)}.week-overview__hero{border:1px solid var(--border-strong);grid-template-columns:minmax(300px,.9fr) minmax(0,1.1fr);display:grid}.week-overview__thumbnail{border-right:1px solid var(--border-strong);background:var(--bg-deep);flex-direction:column;justify-content:flex-end;min-height:430px;padding:30px;display:flex}.week-overview__thumbnail span,.week-overview__thumbnail small{font-family:var(--font-mono), monospace;letter-spacing:.1em}.week-overview__thumbnail span{color:var(--accent);margin-bottom:8px;font-size:.68rem}.week-overview__thumbnail strong{max-width:360px;font-family:var(--font-display), sans-serif;font-size:clamp(2rem,4vw,3.5rem);line-height:1}.week-overview__thumbnail small{color:var(--dim);margin-top:20px;font-size:.58rem}.week-overview__intro{background:var(--surface);flex-direction:column;justify-content:center;padding:clamp(34px,6vw,72px);display:flex}.week-overview__intro h1{margin:10px 0 20px;font-size:clamp(2.8rem,6vw,4.6rem)}.week-overview__summary{max-width:620px;color:var(--body);margin-bottom:30px;font-size:1.08rem}.week-overview__intro .primary-action{width:fit-content}.week-overview__lessons{border-top:1px solid var(--border-strong);margin-top:56px}.week-overview__lessons-header{justify-content:space-between;align-items:end;gap:24px;padding:28px 0 22px;display:flex}.week-overview__lessons-header h2{margin:6px 0 0;font-size:2rem}.week-overview__lessons-header>span{color:var(--muted);font-family:var(--font-mono), monospace;letter-spacing:.08em;font-size:.65rem}.week-lesson-list{border-top:1px solid var(--border);margin:0;padding:0;list-style:none}.week-lesson-list li{border-bottom:1px solid var(--border)}.week-lesson-list a{grid-template-columns:58px 1fr auto;align-items:center;gap:18px;min-height:76px;padding:0 18px;display:grid}.week-lesson-list a:hover{background:var(--surface)}.week-lesson-list__number,.week-lesson-list__status{font-family:var(--font-mono), monospace;letter-spacing:.08em;font-size:.62rem}.week-lesson-list__number{color:var(--accent)}.week-lesson-list__title{font-size:1rem;font-weight:600}.week-lesson-list__status{color:var(--dim)}.course-nav__week-heading{border-bottom:1px solid var(--border);gap:3px;margin:0 8px 24px;padding-bottom:18px;display:grid}.course-nav__week-heading a{color:var(--accent);font-family:var(--font-mono), monospace;letter-spacing:.1em;text-transform:uppercase;border:0;padding:0;font-size:.65rem;display:block}.course-nav__week-heading a:hover{background:0 0;border:0}.course-nav__week-heading span{font-size:.84rem;font-weight:600}.course-nav .course-nav__lessons--primary{border-left:0;margin:0;padding:0}.course-nav__back{color:var(--muted);font-family:var(--font-mono), monospace;letter-spacing:.08em;text-transform:uppercase;margin:24px 8px 0;font-size:.62rem;border:0!important;border-top:1px solid var(--border)!important;padding:14px 0!important;display:block!important}.course-nav__back:hover{color:var(--text);background:0 0!important}
.lesson-main{width:min(var(--content), calc(100% - 64px));margin:0 auto;padding:56px 0 100px}.breadcrumbs{color:var(--muted);flex-wrap:wrap;gap:8px;display:flex}.breadcrumbs a:hover{color:var(--text)}.lesson-meta-line{color:var(--accent);flex-wrap:wrap;gap:14px;margin:38px 0 14px;display:flex}.lesson-header{border-bottom:1px solid var(--border-strong);padding-bottom:38px}.lesson-header h1{margin:0 0 18px;font-size:clamp(2.8rem,7vw,4.5rem)}.lesson-deck{color:var(--muted);margin:0;font-size:1.08rem}.lesson-content{padding-top:42px}.skeleton-copy{max-width:700px;color:var(--body);margin-bottom:42px;font-size:1.08rem}.reveal-block{border:1px solid var(--border-strong);background:var(--surface);margin:44px 0;padding:28px}.reveal-block h2{margin:10px 0 20px;font-size:1.45rem}.reveal-block button,.media-actions button,.download-block button{border:1px solid var(--border-strong);background:var(--bg-deep);min-height:42px;color:var(--text);cursor:pointer;align-items:center;gap:8px;padding:0 14px;display:inline-flex}.reveal-block button:hover{border-color:var(--accent)}.reveal-block__answer{border-top:1px solid var(--border);color:var(--body);padding:18px 0 0}.lesson-navigation{border:1px solid var(--border-strong);background:var(--border-strong);grid-template-columns:1fr 1fr;gap:1px;margin-top:64px;display:grid}.lesson-navigation>a{background:var(--bg-deep);align-items:center;gap:14px;min-height:92px;padding:18px;display:flex}.lesson-navigation__next{text-align:right;justify-content:flex-end}.lesson-navigation small{color:var(--muted);font-family:var(--font-mono), monospace;letter-spacing:.08em;font-size:.6rem;display:block}
.technical-figure,.media-block,.autocad-task,.download-block{border:1px solid var(--border-strong);background:var(--surface);margin:44px 0}.media-label{display:block}.technical-figure>.media-label{border-bottom:1px solid var(--border);padding:14px 18px}.technical-figure__surface{text-align:center;background:#101010;place-content:center;gap:8px;min-height:320px;padding:30px;display:grid}.technical-figure__surface span{color:var(--dim);font-family:var(--font-mono), monospace;letter-spacing:.1em;font-size:.65rem}.technical-figure__surface strong{font-family:var(--font-display), sans-serif;font-size:1.7rem}.technical-figure figcaption{border-top:1px solid var(--border);color:var(--muted);padding:16px 18px;font-size:.88rem}.media-block__header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:start;gap:20px;padding:18px;display:flex}.media-block__header h2{margin:6px 0 0;font-size:1.35rem}.media-status{color:var(--dim)}.video-placeholder,.cad-placeholder{background:var(--bg-deep);min-height:300px;color:var(--muted);place-content:center;justify-items:center;gap:12px;display:grid}.video-placeholder svg{width:42px;height:42px;color:var(--accent)}.cad-placeholder{position:relative;overflow:hidden}.cad-placeholder__crosshair:before,.cad-placeholder__crosshair:after{content:"";background:var(--border);position:absolute}.cad-placeholder__crosshair:before{width:1px;height:100%;top:0;left:50%}.cad-placeholder__crosshair:after{width:100%;height:1px;top:50%;left:0}.media-actions{border-top:1px solid var(--border);gap:8px;padding:12px 18px;display:flex}.media-actions button:disabled,.download-block button:disabled{cursor:not-allowed;color:var(--dim)}.autocad-task{border-left:4px solid var(--accent);padding:26px}.autocad-task h2{margin:9px 0 12px;font-size:1.65rem}.autocad-task p{color:var(--body)}.task-checks{border-top:1px solid var(--border);border-left:1px solid var(--border);grid-template-columns:repeat(3,1fr);margin-top:24px;display:grid}.task-checks span{border-right:1px solid var(--border);border-bottom:1px solid var(--border);color:var(--muted);font-family:var(--font-mono), monospace;letter-spacing:.07em;padding:12px;font-size:.6rem}.download-block{justify-content:space-between;align-items:center;gap:24px;padding:22px;display:flex}.download-block h2{margin:7px 0 4px;font-size:1.3rem}.download-block p{color:var(--muted);margin:0;font-size:.84rem}
@media (max-width:900px){.course-shell{grid-template-columns:1fr}.course-sidebar{border-right:0;border-bottom:1px solid var(--border);height:auto;position:static}.course-nav{padding:12px 14px}.course-nav__weeks{grid-template-columns:repeat(3,1fr)}.course-nav .course-nav__lessons--primary{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.course-sidebar__footer,.course-topbar{display:none}.week-grid,.week-overview__hero{grid-template-columns:1fr}.week-overview__thumbnail{border-right:0;border-bottom:1px solid var(--border-strong);min-height:300px}}@media (max-width:640px){.landing__bar{padding:18px}.overview-header{min-height:70px;padding:0 18px}.overview-header>span,.landing__bar .mono-label{display:none}.landing__hero,.course-main,.lesson-main,.weeks-page,.week-overview{width:calc(100% - 36px)}.landing__hero{padding:60px 0}.landing__rule,.course-nav__weeks{grid-template-columns:1fr 1fr}.course-nav .course-nav__lessons--primary{grid-template-columns:1fr}.course-main{padding-top:46px}.week-card{min-height:260px;padding:22px}.week-card__thumbnail{margin-left:-22px;margin-right:-22px;padding-left:22px;padding-right:22px}.week-overview__intro{padding:28px 22px}.week-overview__thumbnail{min-height:250px;padding:22px}.week-overview__lessons-header{flex-direction:column;align-items:start}.week-lesson-list a{grid-template-columns:36px 1fr;padding:14px 8px}.week-lesson-list__status{grid-column:2}.lesson-main{padding-top:38px}.lesson-navigation,.task-checks{grid-template-columns:1fr}.download-block,.media-block__header{flex-direction:column;align-items:stretch}.technical-figure__surface,.video-placeholder,.cad-placeholder{min-height:230px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}