.knowledge-page{background:radial-gradient(circle at 18% 18%, #3b00db2e, transparent 28rem), var(--page);flex-direction:column;min-height:100vh;display:flex}.knowledge-header{margin:0 auto;position:relative;left:auto;transform:none}.knowledge-header .desktop-nav a[aria-current=page]{color:var(--text)}.knowledge-header .desktop-nav a[aria-current=page]:after{left:0;right:0}.knowledge-catalog-hero{border-bottom:1px solid var(--line);align-items:center;width:min(100% - 80px,1280px);min-height:430px;margin:0 auto;padding:80px 0 70px;display:flex;position:relative;overflow:hidden}.knowledge-catalog-hero>div:not(.knowledge-hero-glow){z-index:1;max-width:900px;position:relative}.knowledge-catalog-hero h1{letter-spacing:-.065em;margin:22px 0 24px;font-size:clamp(3rem,5.4vw,5.4rem);font-weight:540;line-height:.98}.knowledge-catalog-hero h1 em{color:var(--accent-readable);font-style:normal}.knowledge-catalog-hero 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28px;font-size:clamp(3.2rem,6vw,6rem);font-weight:540;line-height:.96}.knowledge-hero h1 em{color:var(--accent-readable);font-style:normal}.knowledge-hero>div>p{max-width:690px;color:var(--text-muted);font-size:var(--type-lead);margin:0;line-height:1.72}.knowledge-hero>div>a{background:var(--ultrasonic-blue);color:var(--snow);font-size:var(--type-body);border:1px solid #3b00db8c;border-radius:8px;align-items:center;gap:24px;margin-top:36px;padding:14px 18px;font-weight:650;display:inline-flex}.knowledge-hero>aside{border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 94%, transparent);border-radius:12px;grid-template-columns:repeat(3,1fr);display:grid;overflow:hidden;box-shadow:0 28px 80px #00000038}.knowledge-hero>aside>span,.knowledge-hero>aside>strong{grid-column:1/-1;padding-left:22px;padding-right:22px}.knowledge-hero>aside>span{color:var(--accent-readable);font-family:Geist Mono,monospace;font-size:var(--type-small);letter-spacing:.12em;padding-top:22px}.knowledge-hero>aside>strong{border-bottom:1px solid var(--line);font-size:var(--type-heading);padding-top:8px;padding-bottom:24px;font-weight:600}.knowledge-hero>aside>div{border-right:1px solid var(--line);text-align:center;padding:18px 12px}.knowledge-hero>aside>div:last-child{border-right:0}.knowledge-hero>aside p{font-family:Geist Mono,monospace;font-size:var(--type-title);margin:0 0 4px;font-weight:650}.knowledge-hero>aside div span{color:var(--text-muted);font-size:var(--type-caption)}.knowledge-modules,.quiz-section{width:min(100% - 80px,1280px);margin:0 auto;padding:100px 0}.knowledge-section-heading{max-width:720px}.knowledge-section-heading h1,.knowledge-section-heading h2{font-size:var(--type-display-section);letter-spacing:-.055em;margin:18px 0 16px;font-weight:540;line-height:1.02}.knowledge-section-heading p{color:var(--text-muted);font-size:var(--type-lead);margin:0;line-height:1.65}.module-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:50px;display:grid}.module-card{border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 94%, transparent);border-radius:12px;min-height:300px;padding:24px;display:grid}.module-card.active{background:linear-gradient(145deg, #3b00db29, transparent 48%), var(--panel);border-color:#3b00db9e;transition:border-color .16s,box-shadow .16s,transform .16s}a.module-card.active:hover,a.module-card.active:focus-visible{border-color:var(--ultrasonic-blue);outline:0;transform:translateY(-3px);box-shadow:0 22px 62px #3b00db2e}.module-card.upcoming{opacity:.62}.module-card-top{justify-content:space-between;align-items:center;display:flex}.module-card-top>span{color:var(--accent-readable);font-family:Geist Mono,monospace;font-size:var(--type-title)}.module-card-top i{border:1px solid 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64px;display:grid}.module-hero>div{max-width:900px;display:grid}.module-hero>div>a{width:fit-content;color:var(--text-muted);font-size:var(--type-small);align-items:center;gap:8px;margin-bottom:58px;display:inline-flex}.module-hero>div>span{color:var(--accent-readable);font-family:Geist Mono,monospace;font-size:var(--type-small);letter-spacing:.12em}.module-hero h1{letter-spacing:-.06em;max-width:840px;margin:18px 0 20px;font-size:clamp(2.7rem,5vw,5rem);font-weight:540;line-height:.98}.module-hero>div>p{max-width:720px;color:var(--text-muted);font-size:var(--type-lead);margin:0;line-height:1.65}.module-hero>aside{border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:24px;display:grid}.module-hero>aside strong{color:var(--accent-readable);letter-spacing:-.06em;font-family:Geist Mono,monospace;font-size:3.5rem;font-weight:560}.module-hero>aside span{color:var(--text);font-size:var(--type-title);font-weight:600}.module-hero>aside p{border-top:1px solid var(--line);color:var(--text-muted);font-size:var(--type-small);margin:22px 0 0;padding-top:16px;line-height:1.45}.knowledge-module-page .quiz-section{padding-top:64px}.quiz-section{padding-top:30px;padding-bottom:120px}.quiz-shell{border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 97%, transparent);border-radius:16px;overflow:visible;box-shadow:0 32px 100px #0003}.quiz-header{z-index:20;justify-content:space-between;align-items:center;min-height:90px;padding:18px 28px;display:flex;position:relative}.quiz-header>div:first-child{gap:5px;display:grid}.quiz-header>div:first-child span{color:var(--accent-readable);font-family:Geist Mono,monospace;font-size:var(--type-caption);letter-spacing:.1em}.quiz-header>div:first-child strong{font-size:var(--type-title);font-weight:600}.quiz-progress-copy{color:var(--text-muted);align-items:baseline;font-family:Geist Mono,monospace;display:flex}.quiz-header-tools{align-items:center;gap:18px;display:flex}.question-selector{gap:4px;display:grid}.question-selector>span:first-child{color:var(--text-muted);font-family:Geist Mono,monospace;font-size:var(--type-caption);letter-spacing:.08em;text-transform:uppercase}.question-select-control{min-width:168px;display:block;position:relative}.question-select-control summary{border:1px solid color-mix(in srgb, var(--ultrasonic-blue) 36%, var(--line));background:linear-gradient(145deg, color-mix(in srgb, var(--ultrasonic-blue) 8%, var(--panel-raised)), var(--panel-raised));width:100%;min-height:42px;color:var(--text);font:inherit;font-size:var(--type-small);cursor:pointer;border-radius:9px;justify-content:space-between;align-items:center;gap:18px;padding:0 13px;font-weight:620;list-style:none;transition:border-color .15s,box-shadow .15s,background .15s;display:flex;box-shadow:0 8px 24px #05050514}.question-select-control summary::-webkit-details-marker{display:none}.question-select-control summary>svg{width:10px;height:10px;color:var(--ultrasonic-blue);flex:none;transition:transform .18s}.question-select-control summary:hover{border-color:color-mix(in srgb, var(--ultrasonic-blue) 68%, var(--line))}.question-select-control summary:focus-visible{border-color:var(--ultrasonic-blue);outline-offset:2px;outline:2px solid #3b00db33;box-shadow:0 10px 28px #3b00db24}.question-select-control[open] summary{border-color:var(--ultrasonic-blue);background:linear-gradient(145deg, color-mix(in srgb, var(--ultrasonic-blue) 13%, var(--panel-raised)), var(--panel-raised));box-shadow:0 10px 28px #3b00db24}.question-select-control[open] summary>svg{transform:rotate(180deg)}.question-options-popover{z-index:80;border:1px solid color-mix(in srgb, var(--ultrasonic-blue) 34%, var(--line));background:color-mix(in srgb, var(--panel-raised) 96%, transparent);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-radius:12px;width:min(370px,100vw - 32px);padding:10px;position:absolute;top:calc(100% + 9px);right:0;box-shadow:0 24px 72px #05050547}.question-options-popover>header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-end;gap:16px;padding:8px 9px 12px;display:flex}.question-options-popover>header>div{gap:2px;display:grid}.question-options-popover>header span,.question-options-popover>header small{color:var(--text-muted);font-family:Geist Mono,monospace;font-size:var(--type-caption)}.question-options-popover>header span{letter-spacing:.08em;text-transform:uppercase}.question-options-popover>header strong{font-size:var(--type-small);font-weight:650}.question-options-popover>header>small{white-space:nowrap;padding-bottom:1px}.question-options-popover ol{scrollbar-color:color-mix(in srgb, var(--ultrasonic-blue) 45%, transparent) transparent;scrollbar-width:thin;gap:4px;max-height:340px;margin:7px 0 0;padding:0 4px 0 0;list-style:none;display:grid;overflow-y:auto}.question-options-popover ol::-webkit-scrollbar{width:6px}.question-options-popover ol::-webkit-scrollbar-thumb{background:color-mix(in srgb, var(--ultrasonic-blue) 45%, transparent);border-radius:999px}.question-options-popover li button{width:100%;min-height:54px;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;grid-template-columns:38px minmax(0,1fr) 18px;align-items:center;gap:10px;padding:7px 10px 7px 7px;transition:border-color .14s,background .14s,transform .14s;display:grid}.question-options-popover li button>span:first-child{border:1px solid var(--line);width:36px;height:36px;color:var(--text-muted);font-family:Geist Mono,monospace;font-size:var(--type-caption);border-radius:7px;place-items:center;display:grid}.question-options-popover li button>span:nth-child(2){gap:2px;min-width:0;display:grid}.question-options-popover li button strong{font-size:var(--type-small);font-weight:620}.question-options-popover li button small{color:var(--text-muted);font-size:var(--type-caption);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.question-options-popover li button i{border:1px solid var(--line);color:#0000;border-radius:50%;place-items:center;width:18px;height:18px;font-size:9px;font-style:normal;display:grid}.question-options-popover li button:hover,.question-options-popover li button:focus-visible{border-color:color-mix(in srgb, var(--ultrasonic-blue) 38%, var(--line));background:color-mix(in srgb, var(--ultrasonic-blue) 7%, transparent);outline:0}.question-options-popover li button[data-current=true]{border-color:color-mix(in srgb, var(--ultrasonic-blue) 60%, var(--line));background:color-mix(in srgb, var(--ultrasonic-blue) 11%, transparent)}.question-options-popover li button[data-current=true]>span:first-child{border-color:var(--ultrasonic-blue);background:var(--ultrasonic-blue);color:var(--snow)}.question-options-popover li button[data-answered=true] i{border-color:color-mix(in srgb, #56d397 55%, var(--line));color:#56d397;background:#56d39726}.quiz-score{color:#56d397;grid-template-columns:auto auto;align-items:center;column-gap:7px;min-width:92px;display:grid}.quiz-score>svg{grid-row:1/3}.quiz-score strong{font-family:Geist Mono,monospace;font-size:var(--type-title);line-height:1}.quiz-score span{color:var(--text-muted);font-size:var(--type-caption)}.quiz-progress-copy strong{color:var(--text);font-size:var(--type-heading)}.quiz-progress{background:var(--line);height:4px}.quiz-progress span{background:var(--ultrasonic-blue);height:100%;transition:width .22s;display:block;box-shadow:0 0 14px #3b00db9e}.question-card{padding:clamp(28px,5vw,64px)}.question-meta{gap:9px;display:flex}.question-meta span{border:1px solid var(--line);color:var(--text-muted);font-family:Geist Mono,monospace;font-size:var(--type-caption);border-radius:5px;padding:5px 8px}.question-meta span:first-child{color:var(--accent-readable);border-color:#3b00db66}.question-card>h2{letter-spacing:-.04em;max-width:980px;margin:24px 0 40px;font-size:clamp(1.8rem,3.2vw,2.75rem);font-weight:540;line-height:1.22}.answer-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.answer-grid button{border:1px solid var(--line);background:var(--panel-raised);min-height:82px;color:var(--text);text-align:left;cursor:pointer;border-radius:9px;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:14px;padding:14px;transition:border-color .15s,background .15s,transform .15s;display:grid}.answer-grid button:hover:not(:disabled),.answer-grid button:focus-visible{border-color:#3b00db9e;outline:0;transform:translateY(-1px)}.answer-grid button:disabled{cursor:default}.answer-grid button>span{border:1px solid var(--line);width:38px;height:38px;color:var(--text-muted);border-radius:7px;place-items:center;font-family:Geist Mono,monospace;display:grid}.answer-grid button strong{font-size:var(--type-body);font-weight:540;line-height:1.4}.answer-grid button i{font-size:var(--type-title);font-style:normal}.answer-grid button[data-state=correct]{background:#56d3971a;border-color:#56d397a3}.answer-grid button[data-state=correct] i{color:#56d397}.answer-grid button[data-state=wrong]{background:#ff6c7814;border-color:#ff6c7894}.answer-grid button[data-state=wrong] i{color:#ff6c78}.answer-feedback{background:#ffae5312;border:1px solid #ffae5359;border-radius:9px;gap:14px;margin-top:20px;padding:18px;display:flex}.answer-feedback[data-correct=true]{background:#56d39712;border-color:#56d39759}.answer-feedback>span{background:var(--ultrasonic-blue);width:30px;height:30px;color:var(--snow);border-radius:50%;flex:none;place-items:center;font-weight:700;display:grid}.answer-feedback 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button:disabled{background:var(--panel-raised);color:var(--text-muted);cursor:not-allowed}.quiz-result{text-align:center;place-items:center;min-height:560px;padding:60px 24px;display:grid}.quiz-result>span{width:64px;height:64px;color:var(--accent-readable);background:#3b00db2e;border-radius:50%;place-items:center;margin-bottom:22px;font-size:2rem;display:grid}.quiz-result>p:first-of-type{color:var(--accent-readable);letter-spacing:.1em;text-transform:uppercase;margin:0 0 12px;font-family:Geist Mono,monospace}.quiz-result>strong{letter-spacing:-.08em;font-size:clamp(3.5rem,8vw,6.5rem);font-weight:540}.quiz-result h2{font-size:var(--type-heading);margin:8px 0 12px;font-weight:600}.quiz-result h2+p{max-width:540px;color:var(--text-muted);margin:0 0 28px;line-height:1.6}.knowledge-footer{width:100%;margin-top:auto;padding:0;display:block}.knowledge-footer-inner{grid-template-columns:1fr auto 1fr;align-items:center;width:min(100% - 80px,1280px);min-height:120px;margin:0 auto;display:grid}.knowledge-footer-inner>a:last-child{color:var(--accent-readable);justify-self:end;align-items:center;gap:9px;font-weight:600;display:inline-flex}html[data-theme=light] .knowledge-page{background:radial-gradient(circle at 18% 18%, #3b00db1a, transparent 28rem), var(--page)}html[data-theme=light] .knowledge-hero>aside,html[data-theme=light] .module-card,html[data-theme=light] .quiz-shell{box-shadow:0 24px 72px #261b4b1a}@media (max-width:900px){.quiz-header{flex-direction:column;align-items:flex-start;gap:22px}.quiz-header-tools{width:100%}.quiz-progress-copy{margin-left:auto}.module-hero{grid-template-columns:1fr}.module-hero>aside{max-width:320px}.knowledge-hero{grid-template-columns:1fr;min-height:auto;padding-top:80px}.knowledge-hero>aside{max-width:440px}.module-grid{grid-template-columns:1fr}.module-card{min-height:240px}.answer-grid{grid-template-columns:1fr}}@media (max-width:660px){.knowledge-header,.knowledge-catalog-hero,.knowledge-hero,.module-hero,.knowledge-modules,.quiz-section,.knowledge-footer-inner{width:min(100% - 32px,1280px)}.knowledge-header{height:72px}.knowledge-hero{gap:48px;padding:64px 0 72px}.knowledge-catalog-hero{min-height:480px;padding:64px 0 72px}.knowledge-catalog-hero h1{font-size:var(--type-display-mobile)}.knowledge-hero-glow{width:470px;height:470px;top:-32px;left:50%;transform:translate(-50%)}.module-hero{gap:36px;padding:48px 0 52px}.module-hero>div>a{margin-bottom:42px}.module-hero h1{font-size:clamp(2.75rem,13vw,4rem)}.knowledge-hero h1{font-size:var(--type-display-mobile);margin-top:18px}.knowledge-modules{padding:72px 0}.quiz-section{padding-bottom:80px}.quiz-header{padding:16px 18px}.quiz-header-tools{flex-wrap:wrap;gap:12px 16px}.question-selector{flex:150px}.question-select-control{width:100%}.question-options-popover{left:0;right:auto}.question-card{padding:24px 16px}.question-card>h2{margin-bottom:28px}.answer-grid button{min-height:74px}.question-footer{flex-direction:column;align-items:stretch}.question-footer button{justify-content:space-between}.knowledge-footer-inner{grid-template-columns:1fr auto}.knowledge-footer-inner p{display:none}}