.chart,.chart>span{display:block}.chart>span>svg,.chart>svg{display:block;width:100%;height:auto}.section-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,320px);gap:var(--space-10);align-items:start;margin:var(--space-6) 0 var(--space-10)}.section-head--text{grid-template-columns:minmax(0,1fr)}.section-head__title{display:flex;align-items:center;gap:var(--space-4);flex-wrap:wrap;margin-bottom:var(--space-4)}.section-head__lead{font-size:17px;line-height:26px;color:var(--color-text-secondary);max-width:62ch;margin-bottom:var(--space-6)}.section-head__cta{gap:var(--space-3)}.section-head__cta svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.section-head__media{position:relative}.section-head__note{display:block;margin-top:var(--space-3);text-align:right;font-size:20px;line-height:24px}.section-panel{margin-top:var(--space-8)}.section-about{font-size:17px;line-height:26px;color:var(--color-text-secondary);max-width:68ch}.subtopics-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-4);align-items:stretch}.subtopics-grid>li{display:flex}.subtopic{position:relative;display:block;width:100%;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);text-decoration:none;color:inherit;transition:border-color var(--dur-hover) var(--ease),box-shadow var(--dur-hover) var(--ease)}a.subtopic:hover{border-color:var(--color-accent-soft);box-shadow:var(--shadow-sm)}.subtopic--soon{cursor:default;background:var(--color-surface-2);color:var(--color-text-tertiary)}.subtopic__head{display:block;margin-bottom:var(--space-4)}.subtopic__name{display:block;font-size:16px;line-height:22px;font-weight:500;color:var(--color-text)}.subtopic--soon .subtopic__name{color:var(--color-text-tertiary)}.subtopic__formula{display:block;margin-top:var(--space-2);color:var(--color-primary);overflow-x:auto}.subtopic--soon .subtopic__formula{color:var(--color-text-tertiary)}.subtopic__meta{display:block;margin-top:var(--space-4)}.subtopic__go{position:absolute;right:var(--space-6);bottom:var(--space-6);width:32px;height:32px;border-radius:50%;background:var(--color-surface-2);border:1px solid var(--color-border);display:grid;place-items:center;transition:background-color var(--dur-hover) var(--ease),border-color var(--dur-hover) var(--ease)}.subtopic.is-picked .subtopic__go{background:var(--color-primary);border-color:var(--color-primary)}.subtopic.is-picked .subtopic__go svg{stroke:var(--color-text-inverse)}.subtopic__go svg{width:16px;height:16px;fill:none;stroke:var(--color-text-tertiary);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:stroke var(--dur-hover) var(--ease)}.proto-list{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-3)}.proto{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4) var(--space-5)}.proto__id{font-weight:600;color:var(--color-primary)}.proto__text{display:block;min-width:0}.proto__title{display:block;font-weight:500}.proto__subtitle{display:block;font-size:14px;line-height:20px;color:var(--color-text-secondary)}.proto__count{font-size:14px;color:var(--color-text-tertiary)}@media (max-width:1023.98px){.section-head{grid-template-columns:minmax(0,1fr);gap:var(--space-6)}.section-head__media{max-width:320px}.subtopics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:767.98px){.subtopics-grid{grid-template-columns:minmax(0,1fr)}.section-head__note{text-align:left}}.task-stub-head .badge{background:var(--color-surface);box-shadow:inset 0 0 0 1px var(--color-border);font-size:13px}.task-stub{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:var(--space-8);padding:var(--space-8);border:1px solid var(--color-border);border-radius:var(--radius-xl);background:var(--color-surface)}.task-stub__art{display:grid;place-items:center;width:280px;aspect-ratio:1;border-radius:var(--radius-lg);background:var(--color-surface-info)}.task-stub__art img{display:block;width:78%;height:auto}.task-stub__text{display:grid;justify-items:start;gap:var(--space-3)}.task-stub__lead{max-width:52ch;font-size:var(--fs-body);line-height:var(--lh-body);color:var(--color-text-secondary)}.task-stub__cta{margin-top:var(--space-2)}.task-stub__cta svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}@media (max-width:767.98px){.task-stub{grid-template-columns:minmax(0,1fr);gap:var(--space-5);padding:var(--space-5)}.task-stub__art{width:100%;max-width:280px;justify-self:center}}