/* Shared Academy curriculum and lesson styles. */
.crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;margin:0 0 20px;color:color-mix(in srgb, var(--color-text) 55%, transparent)}
.crumbs a{text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.lesson-nav{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(280px,100%),1fr));gap:16px;padding:32px 0}
.lesson-nav-link{display:flex;flex-direction:column;gap:6px;padding:18px 20px;border:1px solid var(--color-divider);border-radius:var(--radius-md);background:var(--color-surface);text-decoration:none;color:inherit}
.lesson-nav-link:hover{border-color:color-mix(in srgb, var(--color-accent) 45%, transparent)}
.lesson-nav-link:hover .lesson-nav-title{color:var(--color-accent)}
.lesson-nav-link.next{text-align:right}
.lesson-nav-dir{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent)}
.lesson-nav-title{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:17px;line-height:24px}

.lesson-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.lesson-updated{font-size:12px;line-height:20px;margin:14px 0 0;color:color-mix(in srgb, var(--color-text) 52%, transparent)}
.contents{margin-top:28px}
.contents ol{list-style:none;counter-reset:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit, minmax(min(300px,100%),1fr));gap:2px clamp(24px,4vw,48px);max-width:88ch}
.contents a{display:flex;gap:12px;align-items:baseline;padding:7px 4px;font-size:14px;text-decoration:none;color:color-mix(in srgb, var(--color-text) 70%, transparent);border-radius:var(--radius-sm)}
.contents a span{font-family:var(--font-heading);font-size:12px;font-feature-settings:'tnum' 1;color:var(--color-accent);min-width:20px}
.contents a:hover{color:var(--color-accent);background:color-mix(in srgb, var(--color-text) 5%, transparent)}

.learning-box{margin-top:28px;padding:20px;border:1px solid var(--color-divider);border-radius:var(--radius-md);background:color-mix(in srgb, var(--color-surface) 86%, transparent);max-width:88ch}
.learning-box h2{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:16px;line-height:23px;margin:0}
.learning-box ul{margin:12px 0 0;padding-left:20px;display:grid;gap:6px}
.learning-box li{font-size:14px;line-height:22px;color:color-mix(in srgb, var(--color-text) 74%, transparent)}
.method-note{margin-top:24px;padding:15px 17px;border-left:2px solid var(--color-accent);background:color-mix(in srgb, var(--color-accent-900) 38%, transparent);max-width:88ch;font-size:14px;line-height:23px;color:color-mix(in srgb, var(--color-text) 78%, transparent)}
.method-note strong{color:var(--color-text);font-weight:600}

.slides{padding:8px 0 0}
.slide{display:grid;gap:6px clamp(20px,3vw,40px);padding:52px 0;grid-template-columns:56px minmax(0,1.12fr) minmax(0,.92fr);grid-template-rows:auto 1fr;grid-template-areas:"num fig head" "num fig copy"}
.slide + .slide{background:linear-gradient(to right, transparent, var(--color-neutral-700) 48px calc(100% - 48px), transparent) no-repeat top / 100% 1px}
.slide-n{grid-area:num;align-self:start;margin:0;font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:20px;line-height:1.1;font-feature-settings:'tnum' 1;color:color-mix(in srgb, var(--color-accent) 80%, transparent)}
.slide-head{grid-area:head}
.slide-copy{grid-area:copy;align-self:start}
.slide figure{grid-area:fig;align-self:center;margin:0}
@media (max-width:899px){
  .slide{grid-template-columns:40px minmax(0,1fr);grid-template-rows:auto auto auto;grid-template-areas:"num head" "fig fig" "copy copy";gap:20px clamp(12px,3vw,20px);padding:40px 0}
  .slide-n{font-size:16px}
}
.slide-kicker{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent);margin:0 0 10px}
.slide-title{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:clamp(22px,2.3vw,27px);line-height:1.18;letter-spacing:-.012em;margin:0}
.slide-body{font-size:15.5px;line-height:26px;margin:16px 0 0;max-width:48ch;color:color-mix(in srgb, var(--color-text) 78%, transparent)}
.points{list-style:none;margin:20px 0 0;padding:0;display:flex;flex-direction:column;gap:9px;max-width:52ch}
.points li{font-size:14px;line-height:22px;padding-left:15px;border-left:1px solid var(--color-neutral-700);color:color-mix(in srgb, var(--color-text) 72%, transparent)}
.points li b{font-weight:500;color:var(--color-text)}
.frame{background:var(--color-surface);border:1px solid var(--color-divider);border-radius:var(--radius-md);padding:12px 14px;box-shadow:var(--shadow-sm)}
.slide figcaption{font-size:11.5px;line-height:18px;margin-top:10px;color:color-mix(in srgb, var(--color-text) 50%, transparent)}

.terms{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(420px,100%),1fr));gap:0 clamp(32px,5vw,72px)}
.terms div{display:grid;grid-template-columns:minmax(110px,150px) minmax(0,1fr);gap:16px;padding:13px 0;background:linear-gradient(to right, transparent, var(--color-neutral-700) 48px calc(100% - 48px), transparent) no-repeat top / 100% 1px}
.terms dt{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:14.5px;color:var(--color-text)}
.terms dd{margin:0;font-size:14px;line-height:22px;color:color-mix(in srgb, var(--color-text) 70%, transparent)}

.knowledge-check{margin:44px 0 8px;border:1px solid var(--color-divider);border-radius:var(--radius-md);background:var(--color-surface);overflow:hidden}
.knowledge-check summary{cursor:pointer;list-style:none;padding:18px 20px;font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:17px;line-height:24px;display:flex;justify-content:space-between;gap:16px}
.knowledge-check summary::-webkit-details-marker{display:none}
.knowledge-check summary::after{content:"+";color:var(--color-accent);font-size:22px;font-weight:400}
.knowledge-check[open] summary::after{content:"−"}
.knowledge-check-body{padding:0 20px 20px;display:grid;gap:18px;max-width:82ch}
.knowledge-check-body p{font-size:14.5px;line-height:24px;margin:0;color:color-mix(in srgb, var(--color-text) 78%, transparent)}
.knowledge-check-body strong{color:var(--color-text)}

.grade-rubric{width:100%;border-collapse:collapse;margin-top:18px;font-size:13.5px;line-height:21px}
.grade-rubric th,.grade-rubric td{padding:11px 12px;text-align:left;vertical-align:top;border-top:1px solid var(--color-divider)}
.grade-rubric th{font-family:var(--font-heading);font-weight:600;color:var(--color-text)}
.grade-rubric td{color:color-mix(in srgb, var(--color-text) 74%, transparent)}

.lesson{display:grid;grid-template-columns:minmax(52px,64px) minmax(0,1fr) minmax(0,132px);gap:16px clamp(20px,3vw,40px);align-items:baseline;padding:20px 4px;text-decoration:none;color:inherit;background:linear-gradient(to right, transparent, var(--color-neutral-700) 48px calc(100% - 48px), transparent) no-repeat top / 100% 1px}
.lesson:last-child{background:linear-gradient(to right, transparent, var(--color-neutral-700) 48px calc(100% - 48px), transparent) no-repeat top / 100% 1px,linear-gradient(to right, transparent, var(--color-neutral-700) 48px calc(100% - 48px), transparent) no-repeat bottom / 100% 1px}
a.lesson:hover{background-color:color-mix(in srgb, var(--color-text) 4%, transparent)}
a.lesson:hover .lesson-title{color:var(--color-accent)}
.lesson-n{font-family:var(--font-heading);font-size:15px;font-feature-settings:'tnum' 1;color:var(--color-accent);margin:0}
.lesson-title{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:19px;line-height:26px;margin:0}
.lesson-body{font-size:14.5px;line-height:23px;margin:6px 0 0;max-width:62ch;color:color-mix(in srgb, var(--color-text) 70%, transparent)}
.lesson-topics{list-style:none;margin:14px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit, minmax(min(280px,100%),1fr));gap:5px clamp(20px,3vw,40px);max-width:74ch}
.lesson-topics li{position:relative;padding-left:15px;font-size:13.5px;line-height:21px;color:color-mix(in srgb, var(--color-text) 62%, transparent)}
.lesson-topics li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:1px;background:color-mix(in srgb, var(--color-accent) 75%, transparent)}
.lesson-facts{margin:14px 0 0;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:color-mix(in srgb, var(--color-text) 55%, transparent)}
.lesson-state{justify-self:start;white-space:nowrap}
@media (max-width:640px){.lesson{grid-template-columns:minmax(44px,52px) minmax(0,1fr)}.lesson-state{grid-column:2}.grade-rubric{font-size:12.5px}.grade-rubric th,.grade-rubric td{padding:9px 8px}}

/* Concise public lessons: explain the concepts and the product workflow while
   keeping implementation thresholds and scoring weights outside the site. */
.academy-article{padding-top:clamp(40px,6vw,72px);padding-bottom:64px}
.lesson-page-hero{max-width:900px}
.lesson-page-hero h1{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:clamp(36px,4.5vw,54px);line-height:1.08;letter-spacing:-.025em;margin:16px 0 0}
.lesson-page-hero>p{font-size:17px;line-height:28px;max-width:65ch;margin:22px 0 0;color:color-mix(in srgb,var(--color-text) 80%,transparent)}
.academy-illustration-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:34px 0 4px}
.academy-illustration-pair figure{min-width:0;margin:0}
.academy-illustration-pair .frame{height:100%;display:flex;flex-direction:column;justify-content:center;background:color-mix(in srgb,var(--color-surface) 92%,black);border-color:color-mix(in srgb,var(--color-divider) 92%,transparent);box-shadow:0 18px 42px rgba(0,0,0,.22)}
.academy-illustration-pair figcaption{font-size:11.5px;line-height:18px;margin:10px 2px 0;color:color-mix(in srgb,var(--color-text) 54%,transparent)}
.concept-section{padding:50px 0}
.concept-section+.concept-section{border-top:1px solid var(--color-divider)}
.concept-section h2{font-family:var(--font-heading);font-weight:var(--font-heading-weight);font-size:clamp(25px,3vw,34px);line-height:1.16;letter-spacing:-.02em;margin:0}
.concept-section>.section-lede{font-size:15.5px;line-height:26px;max-width:70ch;margin:16px 0 0;color:color-mix(in srgb,var(--color-text) 72%,transparent)}
.concept-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:28px}
.concept-card{padding:22px;border:1px solid var(--color-divider);border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-surface) 78%,transparent)}
.concept-card span{display:block;font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:var(--color-accent)}
.concept-card h3{font-family:var(--font-heading);font-weight:600;font-size:17px;line-height:23px;margin:12px 0 0}
.concept-card p{font-size:13.5px;line-height:22px;margin:9px 0 0;color:color-mix(in srgb,var(--color-text) 66%,transparent)}
.usage-panel{margin-top:28px;padding:clamp(22px,4vw,34px);border:1px solid color-mix(in srgb,var(--color-accent) 28%,transparent);border-radius:var(--radius-lg);background:linear-gradient(135deg,color-mix(in srgb,var(--color-accent-900) 50%,transparent),transparent 58%),var(--color-surface)}
.usage-panel h3{font-family:var(--font-heading);font-weight:600;font-size:20px;line-height:27px;margin:0}
.usage-steps{list-style:none;counter-reset:use-step;margin:22px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.usage-steps li{counter-increment:use-step;font-size:13.5px;line-height:22px;color:color-mix(in srgb,var(--color-text) 72%,transparent)}
.usage-steps li::before{content:"0" counter(use-step);display:block;margin-bottom:8px;font-size:10px;letter-spacing:.08em;color:var(--color-accent)}
.usage-steps b{display:block;margin-bottom:4px;color:var(--color-text);font-weight:600}
.boundary-box{margin-top:28px;padding:17px 19px;border-left:2px solid var(--color-accent);background:color-mix(in srgb,var(--color-accent-900) 34%,transparent);font-size:14px;line-height:23px;color:color-mix(in srgb,var(--color-text) 74%,transparent)}
.boundary-box strong{color:var(--color-text)}
@media(max-width:760px){.concept-grid,.usage-steps,.academy-illustration-pair{grid-template-columns:1fr}.concept-card{padding:19px}.concept-section{padding:40px 0}}

.ill{display:block;width:100%;height:auto}
.ill text{font-family:Inter,system-ui,sans-serif;font-weight:500}
.ill .t{font-size:10px;letter-spacing:.08em;fill:color-mix(in srgb, var(--color-text) 58%, transparent)}
.ill .t-a{font-size:10px;letter-spacing:.08em;fill:var(--color-accent-300)}
.ill .t-sm{font-size:9px;letter-spacing:.06em;fill:color-mix(in srgb, var(--color-text) 48%, transparent)}
.ill .c-up rect,.ill .c-up line,.ill .c-dn rect,.ill .c-dn line{stroke:rgba(233,233,237,.9);stroke-width:1.2}
.ill .t-hi{font-size:10px;letter-spacing:.08em;fill:var(--color-neutral-200)}
.ill .t-num{font-size:11px;letter-spacing:.1em;fill:var(--color-accent)}
.ill .c-up rect{fill:var(--color-surface)}
.ill .c-dn rect{fill:rgba(233,233,237,.86)}
.ill .zn-d{fill:color-mix(in srgb, var(--color-accent-900) 92%, transparent);stroke:var(--color-accent-700)}
.ill .zn-s{fill:var(--color-neutral-800);stroke:var(--color-neutral-600)}
.ill .zn-x{fill:none;stroke:var(--color-neutral-700);stroke-dasharray:5 4}
.ill .line{stroke:rgba(233,233,237,.85);stroke-width:1.6;fill:none;stroke-linejoin:round;stroke-linecap:round}
.ill .line-a{stroke:var(--color-accent);stroke-width:1.6;fill:none;stroke-linejoin:round;stroke-linecap:round}
.ill .dash{stroke:color-mix(in srgb, var(--color-text) 34%, transparent);stroke-dasharray:4 4;fill:none}
.ill .dash-a{stroke:var(--color-accent);stroke-dasharray:5 4;fill:none}
.ill .rule{stroke:color-mix(in srgb, var(--color-text) 14%, transparent)}
.ill .brk{stroke:color-mix(in srgb, var(--color-text) 30%, transparent);fill:none}
.ill .fa{fill:var(--color-accent)}
.ill .chip{fill:var(--color-neutral-800)}
.ill .chip-a{fill:var(--color-accent-800)}