:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--surface:#f2f3f3;--ink:#1b1f22;--muted:#6b7379;--hairline:#1b1f221f;--hairline-soft:#1b1f2212;--highlight:#6bd9c7;--highlight-ink:#0f3d36;--secondary:#f2b84b;--panel:#fafafabd;--panel-solid:#fbfbfb;--control:#1b1f220d;--control-hover:#1b1f2217;--control-active:#1b1f2221;--accent:#1b1f22;--accent-ink:#f2f3f3;--danger:#b2483b;--tooltip:#1b1f22f0;--tooltip-ink:#f2f3f3;--shadow:0 1px 2px #1b1f220a, 0 14px 40px #1b1f2214;--radius-panel:14px;--radius-control:8px;--font:"Inter Tight", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-arabic:"IBM Plex Sans Arabic", "Inter Tight", system-ui, sans-serif;--line:1.35;--duration:.24s;--ease:cubic-bezier(.2, .7, .2, 1);--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--safe-left:env(safe-area-inset-left,0px);--safe-right:env(safe-area-inset-right,0px);--dock-height:96px;--dock-bottom:50px;--above-dock:calc(var(--dock-bottom) + var(--dock-height) + 12px)}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--surface:#101315;--ink:#e6eaed;--muted:#98a1a8;--hairline:#e6eaed24;--hairline-soft:#e6eaed14;--highlight-ink:#bff2e8;--panel:#161a1dbd;--panel-solid:#171b1e;--control:#e6eaed0f;--control-hover:#e6eaed1c;--control-active:#e6eaed29;--accent:#e6eaed;--accent-ink:#101315;--danger:#e07a6c;--tooltip:#e6eaedf0;--tooltip-ink:#101315;--shadow:0 1px 2px #0000004d, 0 14px 40px #00000073}:root[lang=aeb]{--font:var(--font-arabic);--line:1.5}@font-face{font-family:Inter Tight;src:url(/fonts/InterTight.woff2)format("woff2");font-weight:100 900;font-display:swap}@font-face{font-family:IBM Plex Sans 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var(--highlight);outline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--highlight);outline-offset:2px;box-shadow:0 0 0 4px var(--surface)}kbd{font-family:var(--font);border:1px solid var(--hairline);color:var(--muted);font-variant-numeric:tabular-nums;border-radius:5px;padding:1px 5px;font-size:11px}.num{font-variant-numeric:tabular-nums;direction:ltr;unicode-bidi:isolate;display:inline-block}[dir=rtl] .num{direction:rtl}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}[dir=rtl] .mirror-rtl{transform:scaleX(-1)}.chevron{transition:transform var(--duration) var(--ease)}.is-collapsed .chevron{transform:rotate(180deg)}@media 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var(--safe-left));inset-inline-end:auto}.nav-tab{justify-content:center;width:44px;min-height:44px;padding:0}.nav-tab span{display:none}.systems-panel,.tour-panel,.quiz-panel,.me-panel{width:270px;inset-inline-start:calc(max(12px, var(--safe-left)) + var(--rail))}.footer{display:flex}}.dock-views{flex-wrap:wrap;gap:8px;display:flex}.dock-views .segmented{margin:0}.segmented.view-segments{flex:260px}.segmented.body-switch{flex:none}.segmented.body-switch button{padding-inline:12px}@media (max-width:767px) and (min-height:601px){.view-controls,.gizmo{display:none}}.panel-heading{justify-content:space-between;align-items:center;gap:8px;min-height:24px;padding-inline:2px;display:flex}.panel-heading h2{flex:1;font-size:13px}.pill{background:var(--control);color:var(--muted);border-radius:999px;padding:2px 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span{color:var(--muted);margin-top:6px;font-size:12px;display:block}.loading-track{background:var(--control-active);border-radius:1px;min-width:200px;height:2px;margin-top:12px;overflow:hidden}.loading-track i{background:var(--highlight);transform-origin:0;width:100%;height:100%;transition:transform .4s var(--ease);display:block}.loading.is-error{text-align:center;flex-direction:column;align-items:stretch;gap:14px}.toast{white-space:nowrap;background:var(--tooltip);color:var(--tooltip-ink);animation:toast-in var(--duration) var(--ease);border:0;padding:10px 16px;font-size:13px}@keyframes toast-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}[dir=rtl] .loading-track i{transform-origin:100%}.detail-sheet,.search-panel,.systems-panel.is-open{animation:sheet-in var(--duration) var(--ease)}@keyframes sheet-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media (max-width:350px){.slider-middle{display:none}}.shortcut-sheet{background:var(--panel-solid);width:min(440px,100vw - 24px);max-height:calc(100dvh - 24px);padding:28px 26px 22px;position:absolute;inset-block-start:50%;inset-inline-start:50%;overflow-y:auto;transform:translate(-50%,-50%)}.shortcut-heading{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:20px 0 0;font-size:11px;font-weight:500}.shortcut-heading+.shortcut-list{margin-top:10px}[dir=rtl] .shortcut-sheet{transform:translate(50%,-50%)}.shortcut-list{flex-direction:column;gap:10px;margin:18px 0 0;display:flex}.shortcut-list>div{grid-template-columns:150px 1fr;align-items:baseline;gap:12px;display:grid}.shortcut-list dt{direction:ltr;flex-wrap:wrap;gap:4px;display:flex}.shortcut-list dt.is-text{direction:inherit;font-size:13px}.shortcut-list dd{color:var(--muted);margin:0;font-size:13px}.clip-controls{border-top:1px solid var(--hairline-soft);flex-direction:column;gap:4px;padding-top:10px;display:flex}.clip-row{align-items:center;gap:10px;min-height:32px;display:flex}.clip-label{white-space:nowrap;flex:1;font-size:12px}.segmented.compact{flex:none;margin:0}.segmented.compact button{height:26px;padding-inline:9px;font-size:11px}.clip-controls .icon{width:30px;height:30px}.clip-controls .icon[aria-pressed=true]{background:var(--control-active);color:var(--ink)}.clip-controls .slider:disabled{opacity:.35}.clip-note{color:var(--muted);font-size:11px}.clip-controls.is-disabled .clip-row{opacity:.6}@media (max-width:767px){.clip-row{flex-wrap:wrap}.clip-label{flex:1 0 40%}.clip-controls .slider:disabled,.clip-controls .clip-note{display:none}body:has(.detail-sheet) .clip-controls{display:none}}.tour-panel{gap:10px;padding-bottom:14px}.tour-list{flex-direction:column;gap:6px;margin:8px 0 0;padding:0;list-style:none;display:flex;overflow-y:auto}.tour-list button{text-align:start;border:1px solid var(--hairline-soft);flex-direction:column;align-items:flex-start;gap:4px;width:100%;padding:10px 12px;display:flex}.tour-list button:hover{background:var(--control)}.tour-name{font-size:13px;font-weight:500}.tour-summary{color:var(--muted);font-size:12px;line-height:1.5}.tour-count{color:var(--muted);font-size:11px}.tour-step-name{margin-top:6px;font-size:18px;font-weight:500;line-height:1.2}.tour-step-name:first-letter{text-transform:uppercase}.tour-note{flex:1;min-height:0;font-size:13px;line-height:1.6;overflow-y:auto}.tour-dots{gap:6px;margin-top:4px;display:flex}.tour-dot{background:var(--control-active);border-radius:50%;width:8px;height:8px;padding:0;position:relative}.tour-dot:after{content:"";position:absolute;inset:-8px}.tour-dot.is-done{background:var(--muted)}.tour-dot.is-current{background:var(--highlight);box-shadow:0 0 0 2px var(--panel-solid), 0 0 0 3px var(--highlight)}.tour-nav{justify-content:space-between;align-items:center;gap:8px;display:flex}.tour-nav button{align-items:center;gap:4px;min-height:36px;padding-inline:10px;font-size:12px;display:inline-flex}.tour-counter{color:var(--muted);font-size:12px}.tour-option{color:var(--muted);align-items:center;gap:8px;min-height:28px;font-size:12px;display:flex}.tour-option input{accent-color:var(--accent);width:15px;height:15px;margin:0}.pin{pointer-events:none;z-index:5;transition:opacity var(--duration) var(--ease);direction:ltr;position:absolute;inset-block-start:0;inset-inline-start:0}.pin-dot{background:var(--highlight);border-radius:50%;width:10px;height:10px;margin:-5px 0 0 -5px;position:absolute;box-shadow:0 0 0 3px #6bd9c747}.pin-line{background:var(--ink);opacity:.5;transform-origin:0 0;width:26px;height:1px;position:absolute;top:-1px;left:4px;transform:rotate(-35deg)}.pin-label{background:var(--tooltip);color:var(--tooltip-ink);white-space:nowrap;border-radius:6px;padding:4px 8px;font-size:12px;position:absolute;top:-30px;left:26px}.pin-label:first-letter,.pin-name:first-letter{text-transform:uppercase}.pin-name{display:inline-block}.pin.is-label .pin-dot{background:var(--secondary);box-shadow:0 0 0 3px color-mix(in srgb, var(--secondary) 28%, transparent)}.pin.is-label .pin-line{width:34px}.pin.is-label .pin-label{background:var(--panel-solid);color:var(--ink);border:1px solid color-mix(in srgb, var(--secondary) 60%, transparent);align-items:center;gap:6px;display:flex;left:32px}.pin-label b,.pin.is-compact .pin-dot{background:var(--secondary);color:#1b1f22;border-radius:50%;place-items:center;width:16px;height:16px;font-size:10px;font-weight:600;display:inline-grid}.pin.is-left .pin-line{transform-origin:100% 0;left:auto;right:4px;transform:rotate(35deg)}.pin.is-left .pin-label{left:auto;right:32px}.pin.is-compact .pin-dot{width:18px;height:18px;margin:-9px 0 0 -9px}.quiz-panel{gap:8px;padding-bottom:14px;overflow-y:auto}.quiz-intro{margin:8px 0 4px;font-size:13px;line-height:1.6}.quiz-round{color:var(--muted);margin-top:6px;font-size:11px}.quiz-prompt{color:var(--muted);font-size:12px}.quiz-target{letter-spacing:-.01em;font-size:22px;font-weight:500;line-height:1.15}.quiz-target:first-letter{text-transform:uppercase}.quiz-feedback{min-height:20px;font-size:13px}.quiz-feedback.is-wrong{color:var(--danger)}.quiz-feedback.is-correct{color:var(--highlight-ink)}.quiz-tries{gap:6px;display:flex}.quiz-try{border:1px solid var(--hairline);border-radius:50%;width:10px;height:10px}.quiz-try.is-left{background:var(--highlight);border-color:#0000}.quiz-stats{border-top:1px solid var(--hairline-soft);color:var(--muted);gap:14px;margin-top:auto;padding-top:10px;font-size:12px;display:flex}.quiz-review{flex:1;min-height:0;margin:4px 0;padding:0;font-size:12px;list-style:none;overflow-y:auto}.quiz-review li{border-bottom:1px solid var(--hairline-soft);justify-content:space-between;gap:8px;padding:5px 0;display:flex}.quiz-review li span:first-child:first-letter{text-transform:uppercase}.quiz-review li.is-wrong span:last-child{color:var(--danger)}.quiz-review li.is-correct span:last-child{color:var(--muted)}.quiz-choices{flex-direction:column;gap:6px;display:flex}.quiz-choice{border-radius:var(--radius-control);border:1px solid var(--hairline);min-height:40px;color:var(--ink);text-align:start;background:0 0;padding:8px 12px;font-size:13px;line-height:1.3}.quiz-choice:first-letter{text-transform:uppercase}.quiz-choice:not(:disabled):hover{background:var(--control)}.quiz-choice:disabled{cursor:default;opacity:1;color:var(--muted)}.quiz-choice.is-right{border-color:var(--highlight);background:color-mix(in srgb, var(--highlight) 22%, transparent);color:var(--highlight-ink);font-weight:500}.quiz-choice.is-wrong{border-color:color-mix(in srgb, var(--danger) 45%, 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i+.detail-synonyms:before{content:"· "}.detail-chips{flex-wrap:wrap;gap:4px;display:flex}.detail-note.is-review{color:var(--danger)}.detail-links{flex-wrap:wrap;gap:4px 14px;display:flex}.detail-links .text-link{font-size:12px}.detail-sources{overflow-wrap:anywhere}.detail-fields{flex-direction:column;gap:10px;margin:0;display:flex}.detail-fields dt{color:var(--muted);margin-bottom:2px;font-size:11px}.detail-fields dd{margin:0;font-size:13px;line-height:1.6}.detail-bullets{flex-direction:column;gap:6px;margin:0;padding-inline-start:18px;font-size:13px;line-height:1.55;display:flex}.hierarchy h3{color:var(--muted);margin:8px 0 2px;font-size:11px}.hierarchy-current{border-inline-start:2px solid var(--highlight);background:var(--control);border-radius:0 6px 6px 0;margin:4px 0;padding:6px 8px;font-size:13px;font-weight:500}.hierarchy-current:first-letter{text-transform:uppercase}.link-list{margin:0;padding:0;list-style:none}.link-list button{text-align:start;justify-content:space-between;align-items:center;gap:8px;width:100%;min-height:34px;padding:6px;font-size:13px;display:flex}.link-list button span:first-letter{text-transform:uppercase}.link-list button:hover,.link-list button:focus-visible{background:var(--control)}.dialog-overlay{padding:max(16px, var(--safe-top)) 16px max(16px, var(--safe-bottom));z-index:60;background:#1013156b;place-items:center;display:grid;position:fixed}.dialog{background:var(--panel-solid);width:min(400px,100%);max-height:100%;animation:sheet-in var(--duration) var(--ease);flex-direction:column;gap:16px;padding:28px 28px 22px;display:flex;position:relative;overflow-y:auto}.dialog-title{letter-spacing:-.015em;text-wrap:balance;font-size:24px;line-height:1.15}.dialog-title.is-small{font-size:20px}.dialog-lead{color:var(--muted);flex-direction:column;gap:8px;font-size:14px;line-height:1.45;display:flex}.dialog-list{color:var(--ink);margin:0;padding-inline-start:18px;font-size:13px;line-height:1.55}.dialog-fine a,.dialog-foot a{color:inherit;-webkit-text-decoration-color:var(--hairline);text-decoration-color:var(--hairline)}.dialog-foot{border-top:1px solid var(--hairline-soft);color:var(--muted);justify-content:space-between;align-items:center;padding-top:10px;font-size:12px;display:flex}.dialog-error{color:var(--danger);border-radius:var(--radius-control);background:color-mix(in srgb, var(--danger) 9%, transparent);padding:10px 12px;font-size:13px}.dialog-methods{color:var(--muted);justify-content:center;gap:6px;font-size:12px;display:flex}.dialog-methods span{background:var(--control);border-radius:999px;padding:3px 9px}.dialog-fine{color:var(--muted);font-size:11px;line-height:1.4}.dialog-who{background:var(--control);overflow-wrap:anywhere;border-radius:10px;flex-direction:column;gap:2px;padding:12px 14px;display:flex}.dialog-who span{color:var(--muted);font-size:12px}.dialog-row{justify-content:flex-end;gap:8px;display:flex}.dialog-row.is-split{justify-content:space-between;align-items:center}.dialog-pill{background:color-mix(in srgb, var(--highlight) 25%, transparent);color:var(--highlight-ink);border-radius:999px;padding:2px 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