:root,html[data-theme=dark]{--bg:#090b11;--card:#0f121b;--card2:#151a27;--line:rgba(255,255,255,.085);--ink:#f4f6fb;--ink2:#b6bdcd;--mut:#8a93a7;--brand:#5b82ff;--brand-fill:#2f5be7;--brand-soft:rgba(79,116,255,.15);--ok:#34d399;--warn:#ffc83d;--bad:#ff5d7a;--cyan:#38d3f0;--r:1.25rem;--shadow:0 24px 50px -28px rgba(0,0,0,.85), 0 1px 0 rgba(255,255,255,.04) inset;--dots:rgba(255,255,255,.075);--font-ui:"IBM Plex Sans Arabic","Cairo",Tahoma,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","DejaVu Sans Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}html[data-theme=light]{--bg:#f3f5fa;--card:#ffffff;--card2:#eef1f8;--line:rgba(15,23,42,.1);--ink:#10172a;--ink2:#3b475f;--mut:#66728b;--brand:#2f5be7;--brand-fill:#2f5be7;--brand-soft:rgba(47,91,231,.1);--ok:#0f9d63;--warn:#b7791f;--bad:#d6455d;--cyan:#0891b2;--shadow:0 18px 40px -24px rgba(16,23,42,.28), 0 1px 0 rgba(255,255,255,.9) inset;--dots:rgba(16,23,42,.07)}html body,html:not([data-theme=light]) body,html[data-theme=light] body{font-family:var(--font-ui)!important;background:var(--bg)!important;background-image:none!important;background-attachment:scroll!important;color:var(--ink)!important;line-height:1.8}html body:before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(900px 520px at 85% -10%,rgba(47,91,231,.16),transparent 62%),radial-gradient(700px 420px at 0% 100%,rgba(47,91,231,.08),transparent 60%),radial-gradient(circle at 1px 1px,var(--dots) 1px,transparent 1.3px) 0 0/24px 24px}html[data-theme=light] body:before{background:radial-gradient(900px 520px at 85% -10%,rgba(47,91,231,.1),transparent 62%),radial-gradient(circle at 1px 1px,var(--dots) 1px,transparent 1.3px) 0 0/24px 24px}.ltr-math{font-family:var(--font-mono)!important}h1,h2,h3,.font-black,.font-extrabold{font-weight:700}::selection{background:#4f74ff73;color:#fff}html body .glass-card,html body #lessonSidebar .glass-card,html body #chapterHeaderCard,html body .cb-card,html body .st-stage{background:linear-gradient(180deg,color-mix(in srgb,var(--card2) 55%,var(--card)),var(--card))!important;border:1px solid var(--line)!important;border-radius:var(--r)!important;box-shadow:var(--shadow)!important}html body .glass-header{background:color-mix(in srgb,var(--bg) 78%,transparent)!important;-webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);border-bottom:1px solid var(--line)!important;box-shadow:none}.glass-header:after{height:1px;background:linear-gradient(90deg,transparent,rgba(79,116,255,.55),transparent);opacity:.6}html body #chapterHeaderCard{border-right:1px solid var(--line)!important;position:relative;overflow:hidden}html body #chapterHeaderCard:before{content:"";position:absolute;inset:0 0 0 auto;width:3px;background:linear-gradient(180deg,var(--brand),transparent)}html body .bg-slate-900,html body .bg-slate-950,html body .bg-slate-800,html body [class*="bg-slate-900/"],html body [class*="bg-slate-950/"],html body [class*="bg-slate-800/"]{background:var(--card2)!important}html body .border-slate-600,html body .border-slate-700,html body .border-slate-800,html body [class*="border-slate-700/"],html body [class*="border-sky-500/"]{border-color:var(--line)!important}html body .text-sky-200,html body .text-sky-300,html body .text-sky-400{color:var(--brand)!important}html[data-theme=light] body .text-sky-200,html[data-theme=light] body .text-sky-300,html[data-theme=light] body .text-sky-400{color:#1f48c4!important}html body #activeChapterSub{color:var(--brand)!important}html body #activeChapterTitle{background:none!important;-webkit-text-fill-color:var(--ink)!important;color:var(--ink)!important}html body #lessonOverviewFormula{background:var(--brand-soft)!important;border:1px solid var(--line);border-radius:.9rem}html body button,html body .sv-iconbtn,html body .sv-navbtn,html body .sv-toolbtn,html body .cb-btn,html body #quickSearchBtn,html body #vbOpenBtn{border-radius:.85rem}html body button:hover{border-color:#5b82ff99!important}html body .bg-sky-500,html body .bg-sky-500\/20,html:not([data-theme=light]) body .bg-sky-500,html:not([data-theme=light]) body .bg-sky-500\/20{background:linear-gradient(180deg,#3a66f0,#2851d6)!important;color:#fff!important;border-color:#ffffff24!important;box-shadow:0 10px 26px -12px #2f5be7e6,inset 0 1px #ffffff2e!important}html body #subjectBadge{background:var(--brand-soft)!important;color:var(--brand)!important;border-color:var(--line)!important;box-shadow:none!important}html body .sv-done,html:not([data-theme=light]) body .sv-done,html body .st-term.on,html:not([data-theme=light]) body .st-term.on,html body .cb-btn.on,html:not([data-theme=light]) body .cb-btn.on,html body .vb-btn.active{background:linear-gradient(180deg,#3a66f0,#2851d6)!important;color:#fff!important;border-color:#ffffff24!important}html body .sv-done.done{background:var(--card2)!important;color:var(--ok)!important;border:1px solid var(--ok)!important}html body input:not([type=range]),html body select,html body textarea{background:color-mix(in srgb,var(--card2) 70%,var(--bg))!important;border:1px solid var(--line)!important;border-radius:.85rem!important;color:var(--ink)!important}html body input:not([type=range]):focus,html body select:focus,html body textarea:focus{border-color:var(--brand)!important;box-shadow:0 0 0 3px var(--brand-soft)}html body input[type=range]{background:transparent!important}html body input[type=range]::-webkit-slider-runnable-track{height:7px!important;border-radius:999px;background:var(--line)!important}html body input[type=range]::-moz-range-track{height:7px!important;border-radius:999px;background:var(--line)!important}html body input[type=range]::-webkit-slider-thumb,html body input[type=range].phys-slider::-webkit-slider-thumb{width:22px!important;height:22px!important;margin-top:-7.5px!important;background:#fff!important;border:0!important;box-shadow:0 0 0 5px #4f74ff47,0 4px 12px #00000080!important}html body input[type=range]::-moz-range-thumb{width:22px;height:22px;border:0;border-radius:50%;background:#fff;box-shadow:0 0 0 5px #4f74ff47}html body .sv-ctl input[type=range]{accent-color:var(--brand)}html body #chapterListContainer details,html body .sv-chapter{background:color-mix(in srgb,var(--card2) 60%,var(--card))!important;border:1px solid var(--line)!important;border-radius:1rem!important}html body #chapterListContainer details[open],html body .sv-chapter[open]{border-color:#5b82ff73!important;background:var(--brand-soft)!important}html body #chapterListContainer button[class*="bg-sky-500/20"]{background:var(--brand-soft)!important;color:var(--ink)!important;border-color:#5b82ff8c!important;box-shadow:none!important}html body #chapterListContainer details summary>span:last-child{background:var(--brand-soft)!important;color:var(--brand)!important}html body .sv-lesson.on{background:var(--brand-soft)!important;border-color:#5b82ff8c!important}html body .st-terms{background:var(--card2)!important;border-radius:1rem!important}html body .bg-\[\#040710\],html body .cb-view,html body .sv-canvas-wrap{background:radial-gradient(120% 90% at 50% 0%,#12162a,#07080f 70%)!important;border:1px solid var(--line)!important;border-radius:1.1rem!important}html body #lessonSimCanvas,html body .phys-canvas-wrap{border-radius:1.1rem}html body #chapterHeaderCard .shrink-0.rounded-xl{background:color-mix(in srgb,var(--bg) 70%,var(--card2))!important;border:1px solid var(--line)!important;border-radius:1rem!important;padding:.3rem}html body nav.lg\:hidden{background:color-mix(in srgb,var(--bg) 88%,transparent)!important;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-top:1px solid var(--line)!important}html body #quickSearchBtn{background:#ffc83d1a!important;border-color:#ffc83d47!important;color:var(--warn)!important}html body #vbOpenBtn{background:#ff5d7a1a!important;border-color:#ff5d7a47!important;color:var(--bad)!important}.vb-panel{background:var(--card)!important;border-color:var(--line)!important;border-radius:1.25rem!important}#videoBoardModal{background:#05060adb}html body #portalGate{position:fixed;inset:0;z-index:50;display:block!important;padding:0!important;overflow-x:hidden;overflow-y:auto;background:var(--bg)!important;color:var(--ink);scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.15) transparent}html body #portalGate.hidden{display:none!important}#portalGate *{box-sizing:border-box}.pg-wrap{position:relative;min-height:100%;isolation:isolate}.pg-bg{position:absolute;inset:0;z-index:-1;overflow:hidden;pointer-events:none;background:radial-gradient(1000px 560px at 78% 6%,rgba(47,91,231,.17),transparent 62%),radial-gradient(circle at 1px 1px,var(--dots) 1px,transparent 1.3px) 0 0/26px 26px}.pg-atom{position:absolute;top:-6%;right:-12%;width:min(1000px,88vw);opacity:.9}.pg-node{filter:drop-shadow(0 0 10px #3b6bff) drop-shadow(0 0 22px rgba(59,107,255,.8))}.pg-node-red{filter:drop-shadow(0 0 14px rgba(255,60,90,.55))}.pg-circuit{position:absolute;left:2%;top:10%;width:min(460px,38vw);color:#ffffff16}.pg-arc{position:absolute;left:-10%;bottom:-2%;width:min(900px,90vw)}html[data-theme=light] .pg-circuit{color:#10172a1a}html[data-theme=light] .pg-atom{opacity:.55}.pg-nav{height:5.5rem;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 60%,transparent)}.pg-nav-in{max-width:92rem;height:100%;margin:0 auto;padding:0 clamp(1rem,4.5vw,4.5rem);display:flex;align-items:center;justify-content:space-between;gap:1rem}.pg-nav-r,.pg-nav-l{display:flex;align-items:center;gap:clamp(1rem,3vw,3rem)}.pg-nav-l{gap:.6rem}.pg-brand{display:flex;align-items:center;gap:.9rem;text-decoration:none;color:var(--ink)}.pg-logo{width:3rem;height:3rem;border-radius:1rem;display:grid;place-items:center;color:#fff;background:linear-gradient(160deg,#3d6bff,#2447c9);box-shadow:0 0 0 7px #2f5be724,0 10px 28px -6px #2f5be7bf}.pg-logo svg{width:1.65rem;height:1.65rem}.pg-brand-name{font-size:1.5rem;font-weight:700;letter-spacing:0}.pg-links{display:flex;gap:clamp(1.2rem,2.6vw,2.4rem)}.pg-links a{color:var(--mut);text-decoration:none;font-weight:500;font-size:1rem;padding:.4rem 0;position:relative;transition:color .2s}.pg-links a:hover{color:var(--ink)}.pg-links a:after{content:"";position:absolute;inset:auto 0 -2px;height:2px;border-radius:2px;background:var(--brand);transform:scaleX(0);transition:transform .25s}.pg-links a:hover:after{transform:scaleX(1)}.pg-ghost,.pg-iconbtn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;color:var(--ink);background:#ffffff0a;border:1px solid var(--line);border-radius:1rem;font-weight:600;font-size:1rem;transition:background .2s,border-color .2s,transform .2s}html[data-theme=light] .pg-ghost,html[data-theme=light] .pg-iconbtn{background:#fff}.pg-ghost{padding:.7rem 1.5rem;min-height:3rem}.pg-ghost svg{width:1.05rem;height:1.05rem}.pg-iconbtn{width:3rem;height:3rem;min-height:3rem;padding:0}.pg-iconbtn svg{width:1.2rem;height:1.2rem}.pg-ghost:hover,.pg-iconbtn:hover{background:#ffffff14;transform:translateY(-1px)}.pg-hero{max-width:92rem;margin:0 auto;min-height:calc(100vh - 5.5rem);min-height:calc(100svh - 5.5rem);padding:clamp(2rem,5vh,4rem) clamp(1rem,4.5vw,4.5rem) clamp(2rem,5vh,3.5rem);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,6vw,7rem);align-items:center}.pg-copy{display:flex;flex-direction:column;align-items:flex-start;min-width:0}.pg-pill{display:inline-block;padding:.5rem 1.1rem;border-radius:999px;font-size:.88rem;font-weight:500;color:var(--ink2);background:#ffffff09;border:1px solid var(--line);margin-bottom:clamp(1.4rem,4vh,2.6rem)}html body #portalGate .pg-title{margin:0 0 1.5rem;font-size:clamp(2.9rem,6.6vw,5.6rem);line-height:1.26;font-weight:700;letter-spacing:0;background:none!important;-webkit-text-fill-color:var(--ink)!important;color:var(--ink)!important;text-shadow:0 0 60px rgba(47,91,231,.25)}.pg-lead{margin:0 0 2.2rem;max-width:34rem;color:var(--mut);font-size:clamp(1.05rem,1.45vw,1.3rem);line-height:1.95}.pg-cta{display:flex;flex-wrap:wrap;gap:1rem}.pg-btn{display:inline-flex;align-items:center;justify-content:center;gap:.8rem;padding:1rem 1.9rem;min-height:3.6rem;border-radius:1rem;font-weight:700;font-size:1.1rem;text-decoration:none;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;font-family:inherit}.pg-btn svg{width:1.15rem;height:1.15rem}.pg-btn-primary{color:#fff;background:linear-gradient(180deg,#3a66f0,#2851d6);border:1px solid rgba(255,255,255,.14);box-shadow:0 16px 36px -14px #2f5be7f2,inset 0 1px #fff3}.pg-btn-primary:hover{transform:translateY(-2px);box-shadow:0 22px 44px -14px #2f5be7,inset 0 1px #ffffff40}.pg-btn-primary:hover svg{transform:translate(-3px)}.pg-btn-primary svg{transition:transform .2s}.pg-btn-ghost{color:var(--ink);background:#ffffff09;border:1px solid var(--line)}html[data-theme=light] .pg-btn-ghost{background:#fff}.pg-btn-ghost:hover{background:#ffffff14;transform:translateY(-2px)}.pg-greet{margin:1.5rem 0 0;font-size:.98rem;color:var(--ink2);max-width:34rem}html body #portalGate .pg-resume{display:inline-flex;align-items:center;margin-top:.9rem;max-width:100%;min-height:0;padding:.7rem 1.1rem;text-align:right;line-height:1.6;border-radius:1rem;background:var(--brand-soft);border:1px solid rgba(91,130,255,.35);color:var(--ink);font-weight:600;font-size:.95rem;font-family:inherit}html body #portalGate .pg-resume:hover{border-color:var(--brand)!important;background:#4f74ff38}.pg-stats{display:flex;flex-wrap:wrap;gap:.8rem clamp(1.5rem,4vw,3.4rem);margin:clamp(1.6rem,5vh,3.2rem) 0 0;padding:0}.pg-stats>div{display:flex;align-items:baseline;gap:.7rem}.pg-stats dt{color:var(--mut);font-size:1rem;order:2}.pg-stats dd{margin:0;font-family:var(--font-mono);font-size:clamp(1.9rem,3vw,2.6rem);font-weight:700;color:var(--ink);order:1;line-height:1}.pg-card{position:relative;padding:clamp(1.1rem,2vw,1.7rem);border-radius:1.9rem;min-width:0;background:linear-gradient(180deg,#161a27eb,#0d1019f0);border:1px solid rgba(255,255,255,.09);box-shadow:0 50px 90px -36px #000000e6,0 0 0 1px #ffffff05 inset,0 0 80px -30px #2f5be766;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);display:flex;flex-direction:column;gap:.75rem}html[data-theme=light] .pg-card{background:linear-gradient(180deg,#fff,#f6f8fd);border-color:var(--line);box-shadow:0 40px 80px -40px #1e327859}.pg-chip{position:absolute;top:-1.15rem;left:clamp(1rem,3vw,2.2rem);transform:rotate(-6deg);padding:.75rem 1.7rem;border-radius:1.2rem 2rem;font-family:var(--font-mono);font-weight:700;font-size:1.05rem;color:#fff;letter-spacing:.02em;background:linear-gradient(135deg,#3a66f0,#1f43c0);box-shadow:0 16px 34px -10px #2f5be7d9;z-index:2}.pg-card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;padding-top:.5rem}.pg-card-head h3{margin:0;font-size:clamp(1.3rem,2vw,1.7rem);font-weight:700;line-height:1.4;color:var(--ink)}.pg-card-head p{margin:.2rem 0 0;font-size:.92rem;color:var(--mut);line-height:1.7}.pg-live{display:inline-flex;align-items:center;gap:.5rem;margin-top:.35rem;padding:.3rem .8rem;border-radius:999px;font-size:.82rem;color:var(--ink2);background:#ffffff0d;border:1px solid var(--line);white-space:nowrap}.pg-live i{width:.5rem;height:.5rem;border-radius:50%;background:#22c55e;box-shadow:0 0 #22c55e99;animation:pgPulse 1.8s infinite}@keyframes pgPulse{70%{box-shadow:0 0 0 7px #22c55e00}to{box-shadow:0 0 #22c55e00}}.pg-sim{position:relative;height:clamp(12.5rem,27vh,16rem);border-radius:1.2rem;overflow:hidden;border:1px solid rgba(255,255,255,.09);background:radial-gradient(60% 70% at 50% 45%,rgba(255,60,100,.1),transparent 70%),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px) 0 0/30px 30px,linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px) 0 0/30px 30px,linear-gradient(180deg,#120f19,#0a0b12)}.pg-sim canvas{position:absolute;inset:0;width:100%;height:100%;display:block}.pg-tags{position:absolute;inset:auto .7rem .6rem;display:flex;justify-content:space-between;gap:.5rem;pointer-events:none}.pg-tag{font-family:var(--font-mono);font-size:.88rem;padding:.22rem .6rem;border-radius:.6rem;background:#05060a9e;color:#9aa3b8;white-space:nowrap}.pg-tag b{font-size:1.15rem;margin-inline-end:.2rem}.pg-tag-e b{color:#38d3f0}.pg-tag-i b{color:#ffc83d}.pg-tag-c b{color:#ff4d6d}.pg-ctl{padding:.65rem 1.15rem .3rem;border-radius:1.2rem;background:#ffffff06;border:1px solid var(--line)}html[data-theme=light] .pg-ctl{background:var(--card2)}.pg-ctl-top{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:.15rem}.pg-ctl-top label{font-weight:600;color:var(--ink);font-size:1rem}.pg-ctl-top output{font-family:var(--font-mono);font-weight:700;font-size:.95rem;color:var(--ink)}html body #portalGate .pg-range{-webkit-appearance:none;appearance:none;width:100%;height:1.9rem!important;margin:0;padding:0;cursor:pointer;display:block;background:linear-gradient(to left,#2f5be7 0,#2f5be7 var(--p,50%),rgba(255,255,255,.12) var(--p,50%),rgba(255,255,255,.12) 100%) center/100% 6px no-repeat!important;border-radius:999px}html[data-theme=light] body #portalGate .pg-range{background:linear-gradient(to left,#2f5be7 0,#2f5be7 var(--p,50%),rgba(16,23,42,.14) var(--p,50%),rgba(16,23,42,.14) 100%) center/100% 6px no-repeat!important}html body #portalGate .pg-range::-webkit-slider-runnable-track{height:1.9rem!important;background:transparent!important}html body #portalGate .pg-range::-moz-range-track{background:transparent!important}html body #portalGate .pg-range::-webkit-slider-thumb{-webkit-appearance:none;width:1.65rem!important;height:1.65rem!important;margin-top:.12rem!important;border-radius:50%;background:#fff!important;border:0!important;box-shadow:0 0 0 5px #4f74ff4d,0 4px 14px #0000008c!important;transition:box-shadow .2s}html body #portalGate .pg-range:hover::-webkit-slider-thumb,html body #portalGate .pg-range:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 8px #4f74ff57,0 4px 14px #0000008c!important}html body #portalGate .pg-range::-moz-range-thumb{width:1.65rem;height:1.65rem;border:0;border-radius:50%;background:#fff;box-shadow:0 0 0 5px #4f74ff4d}.pg-tiles{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}.pg-tile{padding:.65rem 1.2rem .7rem;border-radius:1.2rem;background:#ffffff08;border:1px solid var(--line);min-width:0}html[data-theme=light] .pg-tile{background:var(--card2)}.pg-tile span{display:block;font-size:.88rem;color:var(--mut);margin-bottom:.15rem}.pg-tile b{display:block;font-family:var(--font-mono);font-size:clamp(1.8rem,2.6vw,2.4rem);font-weight:700;line-height:1.15;color:var(--ink);text-align:right}.pg-tile b small{font-size:.9rem;margin-inline-start:.3rem;color:#ff5d7a;font-weight:700}.pg-tile-amber b{color:#ffc83d}.pg-tile-amber b small{color:var(--mut)}.pg-note{margin:0;font-size:.85rem;color:var(--mut);line-height:1.8}@media(max-height:900px)and (min-width:1021px){.pg-note{display:none}}.pg-circuit text{direction:ltr;unicode-bidi:isolate}.pg-stages-sec{max-width:92rem;margin:0 auto;padding:clamp(3rem,8vh,6rem) clamp(1rem,4.5vw,4.5rem) 2rem;scroll-margin-top:1rem}.pg-sec-head{text-align:center;margin-bottom:2.4rem}.pg-eyebrow{display:inline-block;font-size:.85rem;font-weight:600;letter-spacing:.04em;color:var(--brand);padding:.3rem .9rem;border-radius:999px;background:var(--brand-soft);border:1px solid rgba(91,130,255,.3);margin-bottom:.9rem}html body #portalGate .pg-h2{margin:0 0 .6rem;font-size:clamp(1.9rem,4vw,3rem);line-height:1.4;font-weight:700;background:none!important;-webkit-text-fill-color:var(--ink)!important;color:var(--ink)!important}.pg-sec-head p{margin:0;color:var(--mut);font-size:1.08rem}html body #portalGate .st-stages{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.25rem;max-width:none}html body #portalGate .st-stage-secondary{grid-column:1/-1}@media(max-width:900px){html body #portalGate .st-stages{grid-template-columns:minmax(0,1fr)}}html body #portalGate .st-stage{padding:1.4rem}html body .st-stage-icon{width:3.2rem;height:3.2rem;border-radius:1.05rem;background:var(--brand-soft);color:var(--brand);border:1px solid var(--line)}html body .st-stage-title{font-size:1.3rem;font-weight:700}.st-stage-sub{font-size:.9rem}html body #portalGate .st-grades{gap:.75rem}html body #portalGate .st-grade{flex-direction:column;align-items:flex-start;gap:.5rem;padding:.9rem 1rem;min-height:5.2rem;border-radius:1.1rem;background:#ffffff08;border:1px solid var(--line)}html[data-theme=light] body #portalGate .st-grade{background:var(--card2)}html body #portalGate .st-grade:hover{border-color:#5b82ff99!important;background:var(--brand-soft);transform:translateY(-3px);box-shadow:0 14px 30px -18px #2f5be7e6}html body #portalGate .st-grade-num{width:2.2rem;height:2.2rem;border-radius:.75rem;font-family:var(--font-mono)}html body #portalGate .st-grade-name{font-size:.92rem;font-weight:600;color:var(--ink);line-height:1.5}html body #portalGate .st-stage-secondary{background:radial-gradient(700px 300px at 100% 0%,rgba(47,91,231,.16),transparent 65%),linear-gradient(180deg,color-mix(in srgb,var(--card2) 55%,var(--card)),var(--card))!important;border-color:#5b82ff47!important}html body #portalGate .st-stage-secondary>.glass-card{background:transparent!important;border:0!important;box-shadow:none!important;padding:.25rem 0 0!important}html body #portalGate .st-stage-secondary>.glass-card:hover{transform:none!important;box-shadow:none!important}html body #portalGate .st-stage-secondary .grid>div{background:#ffffff08!important;border:1px solid var(--line)!important;border-radius:1.05rem!important;padding:.9rem 1rem!important;transition:transform .2s,border-color .2s,background .2s}html[data-theme=light] body #portalGate .st-stage-secondary .grid>div{background:var(--card2)!important}html body #portalGate .st-stage-secondary .grid>div:hover{transform:translateY(-2px);border-color:#5b82ff8c!important;background:var(--brand-soft)!important}@media(min-width:1100px){html body #portalGate .st-stage-secondary .grid{grid-template-columns:repeat(4,minmax(0,1fr))!important}}html body #portalGate .st-stage-secondary .grid>div b{color:var(--brand)!important;font-weight:700}html body #portalGate .st-stage-secondary [class*="bg-slate-950/"]{background:var(--brand-soft)!important;border:1px solid rgba(91,130,255,.25);border-radius:.9rem}html body #portalGate .st-stage-secondary .group>span:last-child{border:1px solid rgba(255,255,255,.14)}.pg-foot{text-align:center;color:var(--mut);font-size:.9rem;padding:2.2rem 1rem 2.6rem}@media(prefers-reduced-motion:no-preference){.pg-copy>*{animation:pgUp .7s cubic-bezier(.2,.7,.2,1) backwards}.pg-copy>*:nth-child(2){animation-delay:.07s}.pg-copy>*:nth-child(3){animation-delay:.14s}.pg-copy>*:nth-child(4){animation-delay:.2s}.pg-copy>*:nth-child(5){animation-delay:.26s}.pg-copy>*:nth-child(6){animation-delay:.3s}.pg-copy>*:nth-child(7){animation-delay:.34s}.pg-card{animation:pgUp .8s .15s cubic-bezier(.2,.7,.2,1) backwards}.pg-chip{animation:pgChip 5s ease-in-out infinite}}@keyframes pgUp{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}@keyframes pgChip{0%,to{transform:rotate(-6deg) translateY(0)}50%{transform:rotate(-5deg) translateY(-4px)}}@media(max-width:1020px){.pg-hero{grid-template-columns:minmax(0,1fr);min-height:0;gap:3rem}.pg-links{display:none}.pg-atom{width:130vw;right:-40%;top:-2%;opacity:.6}.pg-circuit{display:none}}@media(max-width:560px){.pg-nav{height:4.5rem}.pg-brand-name{font-size:1.2rem}.pg-logo{width:2.6rem;height:2.6rem;border-radius:.9rem}.pg-ghost{padding:.55rem 1rem}.pg-btn{flex:1 1 100%}.pg-stats dt{font-size:.9rem}.pg-tag{font-size:.78rem}.pg-tag b{font-size:1rem}.pg-chip{font-size:.9rem;padding:.6rem 1.2rem}}html body #portalGate .pg-range:focus-visible{outline:none!important}html body #tabBtn-lab:not(.bg-sky-500),html body #tabBtn-revision:not(.bg-sky-500),html body #tabBtn-quiz:not(.bg-sky-500),html body #tabBtn-lab.bg-emerald-500,html body #tabBtn-revision.bg-emerald-500,html body #tabBtn-quiz.bg-emerald-500{background:transparent!important;border:1px solid transparent!important;color:var(--ink2)!important;box-shadow:none!important}html body #tabBtn-lab:not(.bg-sky-500):hover,html body #tabBtn-revision:not(.bg-sky-500):hover,html body #tabBtn-quiz:not(.bg-sky-500):hover{color:var(--ink)!important;background:#ffffff0d!important}html body #mobTab-lab,html body #mobTab-revision,html body #mobTab-quiz{background:transparent!important;border:0!important;box-shadow:none!important;color:var(--mut)!important;position:relative}html body #mobTab-lab.text-sky-400,html body #mobTab-revision.text-sky-400,html body #mobTab-quiz.text-sky-400{color:var(--brand)!important}html body #mobTab-lab.text-sky-400:before,html body #mobTab-revision.text-sky-400:before,html body #mobTab-quiz.text-sky-400:before{content:"";position:absolute;top:-.4rem;left:30%;right:30%;height:3px;border-radius:0 0 3px 3px;background:var(--brand);box-shadow:0 4px 14px var(--brand)}html body .glass-header button#soundToggleBtn,html body .glass-header button[onclick="showPortalGate()"],html body #themeToggleBtn{background:var(--card2)!important;border:1px solid var(--line)!important;color:var(--ink2)!important;border-radius:.85rem!important}html[data-theme=light] .pg-tile-amber b{color:#b7791f}html[data-theme=light] .pg-tag-i b{color:#ffc83d}.pg-ctls{display:flex;flex-direction:column;gap:.75rem}@media(min-width:1021px)and (max-height:820px){.pg-ctls{display:grid;grid-template-columns:1fr 1fr}.pg-ctl-top{flex-direction:column;align-items:flex-start;gap:0}.pg-sim{height:clamp(11rem,26vh,13rem)}.pg-hero{padding-top:2.4rem;padding-bottom:1.6rem}.pg-pill{margin-bottom:1.2rem}.pg-stats{margin-top:1.4rem}}html body .cb-card{padding:0!important;overflow:hidden;scroll-margin-top:5rem;position:relative}html body .cb-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,transparent,var(--brand),#38d3f0,transparent);z-index:1}.cb-head{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.2rem;padding:1.3rem 1.4rem 1.1rem;background:radial-gradient(600px 200px at 100% 0%,rgba(47,91,231,.22),transparent 70%),linear-gradient(180deg,rgba(255,255,255,.03),transparent);border-bottom:1px solid var(--line)}.cb-badge{width:3.4rem;height:3.4rem;flex:none;border-radius:1.1rem;display:grid;place-items:center;color:#fff;background:linear-gradient(160deg,#3d6bff,#2447c9);box-shadow:0 0 0 6px #2f5be724,0 12px 28px -8px #2f5be7cc}.cb-badge svg{width:1.9rem;height:1.9rem}.cb-head-txt{flex:1 1 18rem;min-width:0}html body .cb-head h3{display:flex;align-items:center;gap:.6rem;margin:0;font-size:clamp(1.25rem,2.2vw,1.65rem);font-weight:700;color:var(--ink)}.cb-3d{font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.06em;padding:.15rem .55rem;border-radius:999px;color:#fff;background:linear-gradient(135deg,#3a66f0,#1f43c0)}html body .cb-head .cb-sub{margin:.2rem 0 .7rem;font-size:.98rem;color:var(--ink2);line-height:1.7}.cb-steps{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}.cb-steps li{display:inline-flex;align-items:center;gap:.5rem;padding:.3rem .8rem .3rem .6rem;border-radius:999px;font-size:.85rem;color:var(--ink2);background:#ffffff0a;border:1px solid var(--line)}html[data-theme=light] .cb-steps li{background:var(--card2)}.cb-steps b{width:1.4rem;height:1.4rem;border-radius:50%;display:grid;place-items:center;font-family:var(--font-mono);font-size:.75rem;color:#fff;background:var(--brand-fill)}.cb-how{flex:1 1 100%}.cb-how summary{cursor:pointer;list-style:none;display:inline-flex;align-items:center;gap:.4rem;font-size:.85rem;font-weight:600;color:var(--brand)}.cb-how summary::-webkit-details-marker{display:none}.cb-how summary:before{content:"ⓘ";font-size:1rem}.cb-how[open] summary{margin-bottom:.4rem}html body .cb-how p{margin:0;padding:.8rem 1rem;border-radius:.9rem;background:var(--brand-soft);border:1px solid var(--line);font-size:.92rem;line-height:1.9;color:var(--ink2)}html body .cb-grid{padding:1.1rem 1.2rem 1.3rem;gap:1.1rem}.cb-palette{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));gap:.7rem}.cb-group{padding:.65rem .7rem .7rem;border-radius:1rem;background:#ffffff06;border:1px solid var(--line)}html[data-theme=light] .cb-group{background:var(--card2)}.cb-cap{display:block;margin-bottom:.45rem;font-size:.72rem;font-weight:600;letter-spacing:.05em;color:var(--mut)}.cb-btns{display:flex;flex-wrap:wrap;gap:.4rem}html body .cb-btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;min-height:2.6rem;padding:.4rem .85rem;border-radius:.85rem;font-size:.9rem;font-weight:600;font-family:inherit;color:var(--ink);background:linear-gradient(180deg,#ffffff0f,#ffffff06);border:1px solid var(--line);box-shadow:0 1px #ffffff0d inset;transition:transform .15s,background .15s,border-color .15s,box-shadow .15s}html[data-theme=light] .cb-btn{background:#fff}html body .cb-btn:hover:not(:disabled){transform:translateY(-2px);border-color:#5b82ff99!important;box-shadow:0 10px 20px -12px #2f5be7e6}html body .cb-btn:active{transform:translateY(0) scale(.98)}.cb-ic{font-size:1.05rem;line-height:1}html body .cb-btn.on,html:not([data-theme=light]) body .cb-btn.on{color:#fff;border-color:#ffffff29!important;background:linear-gradient(180deg,#3a66f0,#2851d6)!important;box-shadow:0 12px 24px -12px #2f5be7,0 1px #fff3 inset}html body .cb-danger{color:var(--bad)}html body .cb-danger:hover:not(:disabled){border-color:var(--bad)!important;box-shadow:0 10px 20px -12px var(--bad)}html body .cb-view{height:clamp(20rem,50vw,33rem);border-radius:1.3rem!important;border:1px solid rgba(91,130,255,.28)!important;background:radial-gradient(120% 100% at 50% 0%,#17204a,#080b17 75%)!important;box-shadow:0 30px 60px -34px #000000e6,0 0 0 1px #ffffff08 inset}.cb-chip{position:absolute;top:.8rem;right:.8rem;z-index:2;display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .8rem;border-radius:999px;font-size:.78rem;color:#cfd7ea;pointer-events:none;background:#080a149e;border:1px solid rgba(255,255,255,.1);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.cb-chip i{width:.45rem;height:.45rem;border-radius:50%;background:#22c55e;box-shadow:0 0 #22c55e99;animation:pgPulse 1.8s infinite}.cb-tools{gap:.4rem;padding:.4rem;border-radius:1.1rem;background:#ffffff08;border:1px solid var(--line);justify-content:center}html[data-theme=light] .cb-tools{background:var(--card2)}.cb-hint,html body .cb-hint{border-radius:.9rem;border:1px dashed rgba(91,130,255,.4);background:var(--brand-soft);color:var(--ink);font-size:.9rem}html body .cb-hint:empty{display:none}.cb-tiles{gap:.7rem}html body .cb-tile{position:relative;padding:.8rem .8rem .7rem;border-radius:1rem;text-align:right;background:#ffffff08;border:1px solid var(--line);overflow:hidden}html[data-theme=light] .cb-tile{background:var(--card2)}.cb-tile:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--c,var(--brand))}.cb-t-r{--c:#ff5d7a}.cb-t-v{--c:#ffc83d}.cb-t-i{--c:#38d3f0}.cb-t-p{--c:#34d399}html body .cb-tile span{font-size:.78rem;color:var(--mut)}html body .cb-tile b{margin-top:.15rem;font-family:var(--font-mono);font-size:1.2rem;font-weight:700;color:var(--ink)}html body .cb-formula{border-radius:1rem;background:var(--brand-soft)!important;border:1px solid rgba(91,130,255,.25)}html body .cb-box{border-radius:1.1rem;background:#ffffff06;border:1px solid var(--line);padding:.9rem}html[data-theme=light] .cb-box{background:var(--card2)}html body .cb-box>b.cb-line,html body .cb-box>.cb-line:first-child{padding-bottom:.55rem;border-bottom:1px solid var(--line);font-weight:700;color:var(--ink)}.cb-seg{gap:.4rem}html body .cb-row{border-radius:.9rem;background:#ffffff06}html body .cb-row.sel{border-color:#5b82ffb3;background:var(--brand-soft)}@media(max-width:640px){.cb-head{padding:1.1rem 1rem .9rem}.cb-badge{width:2.9rem;height:2.9rem}html body .cb-grid{padding:.8rem}html body .cb-view{height:clamp(19rem,95vw,26rem)}.cb-tools .cb-btn{flex:1 1 calc(33% - .4rem);padding-inline:.5rem;font-size:.82rem}}@media(min-width:1100px){html body .cb-grid{grid-template-columns:minmax(0,1.75fr) minmax(0,1fr)}}.cb-palette{display:flex;flex-wrap:wrap;gap:.5rem}.cb-group{flex:1 1 auto;display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;padding:.45rem .6rem}.cb-cap{margin:0;flex:none}html body .cb-group .cb-btn{min-height:2.25rem;padding:.25rem .65rem;font-size:.85rem}html body #portalGate .pg-card{gap:.85rem;padding:clamp(1.1rem,2vw,1.6rem);border-radius:1.5rem;border:1px solid rgba(255,255,255,.1);background:linear-gradient(180deg,#151926f5,#0c0f17f7);box-shadow:0 40px 80px -40px #000000e6,0 0 0 1px #ffffff06 inset,0 1px #ffffff12 inset}html[data-theme=light] body #portalGate .pg-card{background:linear-gradient(180deg,#fff,#f6f8fd);border-color:var(--line);box-shadow:0 40px 80px -40px #1e327859}html body #portalGate .pg-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;border-radius:1.5rem 1.5rem 0 0;background:linear-gradient(90deg,transparent,var(--brand) 30%,var(--cyan) 70%,transparent);opacity:.85;pointer-events:none}html body #portalGate .pg-chip{position:static;transform:none;animation:none;display:inline-block;margin:0 0 .55rem;padding:.22rem .7rem;border-radius:.5rem;font-size:.8rem;font-weight:600;letter-spacing:.04em;box-shadow:none;color:var(--brand);background:var(--brand-soft);border:1px solid rgba(91,130,255,.3)}html body #portalGate .pg-card-head{padding-top:.25rem;align-items:flex-start}html body #portalGate .pg-card-head h3{font-size:clamp(1.2rem,1.8vw,1.5rem)}html body #portalGate .pg-live{background:#22c55e1a;border-color:#22c55e4d;color:#4ade80;font-weight:600}html[data-theme=light] body #portalGate .pg-live{color:#0f9d63}html body #portalGate .pg-sim{border-radius:1rem;border:1px solid rgba(255,255,255,.08);background:radial-gradient(70% 80% at 50% 40%,rgba(59,107,255,.1),transparent 72%),linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(180deg,#0e1220,#090b13)}html body #portalGate .pg-tags{inset:auto .6rem .5rem;justify-content:flex-start;gap:.4rem}html body #portalGate .pg-tag{font-size:.74rem;padding:.18rem .5rem;border-radius:.45rem;background:#ffffff0d;border:1px solid rgba(255,255,255,.07);color:#8f99b0;letter-spacing:.02em}html body #portalGate .pg-tag b{font-size:.86rem;font-weight:700;margin-inline-end:.15rem}.pg-eq{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.55rem .95rem;border-radius:.8rem;font-family:var(--font-mono);font-size:.9rem;background:#4f74ff14;border:1px solid rgba(91,130,255,.22)}.pg-eq-f{color:var(--brand);font-weight:700}.pg-eq-v{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}html[data-theme=light] .pg-eq{background:#2f5be70f}html body #portalGate .pg-ctl{padding:.6rem 1rem .4rem;border-radius:.9rem;background:#ffffff06}html body #portalGate .pg-ctl-top label{font-size:.92rem;font-weight:600;color:var(--ink2)}html body #portalGate .pg-ctl-top output{font-size:.85rem;padding:.1rem .5rem;border-radius:.4rem;background:#ffffff0f;color:var(--ink)}.pg-scale{display:flex;justify-content:space-between;margin-top:-.1rem;font-family:var(--font-mono);font-size:.68rem;color:var(--mut);opacity:.8;padding:0 .2rem}html body #portalGate .pg-tile{border-radius:.9rem;padding:.6rem 1rem .65rem;background:#ffffff08;position:relative;overflow:hidden}html body #portalGate .pg-tile:before{content:"";position:absolute;inset:0 0 0 auto;width:3px;background:var(--bad);opacity:.9}html body #portalGate .pg-tile-amber:before{background:var(--warn)}html body #portalGate .pg-tile span{font-size:.8rem;font-weight:500}html body #portalGate .pg-tile b{font-size:clamp(1.5rem,2.2vw,2rem);text-align:left;font-variant-numeric:tabular-nums}html body #portalGate .pg-tile b small{font-size:.8rem}html body #portalGate .pg-note{font-size:.8rem;padding-top:.1rem}@media(max-height:900px)and (min-width:1021px){.pg-eq{display:flex}}.pg-lbl{position:absolute;transform:translate(-50%,-50%);padding:.12rem .45rem;border-radius:.4rem;pointer-events:none;white-space:nowrap;font-family:var(--font-mono);font-size:.72rem;font-weight:600;line-height:1.4;color:#ffc83d;background:#0c0f18eb;border:1px solid rgba(255,255,255,.12);font-variant-numeric:tabular-nums}html body .cb-view{height:clamp(24rem,72vh,40rem)!important}@media(max-width:639px){html body .cb-view{height:clamp(21rem,62vh,28rem)!important}}html body .cb-card .cb-head h3{font-size:clamp(1.5rem,2.8vw,2rem)!important;font-weight:800;letter-spacing:0}html body .cb-card .cb-head .cb-sub{font-size:1.05rem}html body .cb-card .cb-chip{font-size:.85rem;font-weight:600}.cb-card .cb-res,.cb-card .cb-info{unicode-bidi:plaintext}.cb-card .cb-row .cb-nm{font-size:1.05rem}.cb-card input,.cb-card .cb-tile b,.cb-card .cb-res{font-variant-numeric:tabular-nums}html body #portalGate .pg-sim{height:clamp(17rem,44vh,25rem)}html body #portalGate .pg-card{justify-content:flex-start}html.gate-open,html.gate-open body{overflow:hidden!important}html[data-theme=light]{--bg:#f6f8fb;--card:#ffffff;--card2:#ffffff;--line:rgba(31,41,55,.1);--ink:#171b24;--ink2:#465063;--mut:#768093;--brand:#16ad95;--brand-fill:#109982;--brand-soft:rgba(22,173,149,.1);--accent:#f47752;--ok:#15946b;--warn:#dc9224;--bad:#d95667;--cyan:#149b9a;--r:1.25rem;--shadow:0 24px 56px -38px rgba(26,39,63,.28),0 1px 0 rgba(255,255,255,.95) inset;--dots:rgba(35,47,65,.045)}html[data-theme=dark]{--brand:#36c5a9;--brand-fill:#12a98f;--brand-soft:rgba(54,197,169,.14);--accent:#ff8966}html[data-theme=light] body:before{background:radial-gradient(900px 440px at 8% 0%,rgba(244,119,82,.08),transparent 62%),radial-gradient(900px 520px at 92% 0%,rgba(22,173,149,.075),transparent 64%)}html[data-theme=light] ::selection{background:#16ad953d;color:#171b24}html[data-theme=light] body .text-sky-200,html[data-theme=light] body .text-sky-300,html[data-theme=light] body .text-sky-400{color:var(--brand-fill)!important}html body button:hover{border-color:#16ad957a!important}html body #portalGate{background:#f6f8fb!important;color:var(--ink)}html[data-theme=dark] body #portalGate{background:var(--bg)!important}html[data-theme=light] .pg-bg{background:radial-gradient(700px 420px at 14% 7%,rgba(244,119,82,.09),transparent 66%),radial-gradient(900px 520px at 86% 14%,rgba(22,173,149,.1),transparent 65%)}html[data-theme=light] .pg-atom{opacity:.17;filter:saturate(.4)}html[data-theme=light] .pg-circuit{color:#16ad951a}html[data-theme=light] .pg-arc{opacity:.16}.pg-nav{position:sticky;top:0;z-index:15;height:5rem;background:#ffffffe0;border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}html[data-theme=dark] .pg-nav{background:#090b11e0}.pg-nav-in{max-width:88rem;padding-inline:clamp(1rem,5vw,4rem)}.pg-logo{background:linear-gradient(145deg,#18b79b,#0e9c86);box-shadow:0 8px 22px -12px #109982bf}.pg-brand-name{font-weight:800}.pg-brand-name:after{content:".";color:var(--accent);font-size:1.65em;line-height:0}.pg-links a[aria-current=page]{color:var(--accent)}.pg-links a[aria-current=page]:after{transform:scaleX(1)}.pg-links a:after{background:var(--accent)}.pg-links .pg-nav-home{padding:.32rem .82rem;border:1px solid rgba(22,173,149,.2);border-radius:.8rem;background:#16ad9512;color:#108b76;font-weight:700}.pg-links .pg-nav-home:hover{background:#16ad9521}.pg-links .pg-nav-home:after{display:none}html[data-theme=dark] .pg-links .pg-nav-home{border-color:#36c5a947;background:#36c5a91a;color:#69d5c0}.pg-ghost{min-height:2.8rem;padding:.6rem 1.4rem;border-radius:999px;background:#171b24;color:#fff;border-color:#171b24}.pg-ghost:hover{background:#303744;color:#fff}html[data-theme=light] .pg-iconbtn{background:#fff;border-radius:50%;color:var(--ink2)}.pg-hero{direction:ltr;max-width:88rem;min-height:min(48rem,calc(100svh - 5rem));padding:clamp(2.5rem,7vh,5rem) clamp(1rem,5vw,4rem);grid-template-columns:minmax(0,1.03fr) minmax(0,.97fr);gap:clamp(2rem,5vw,5rem)}.pg-copy,.pg-card{direction:rtl}.pg-copy{align-items:flex-start}.pg-pill{margin-bottom:1.4rem;padding:.35rem .85rem;border:0;background:#f477521f;color:#d85f3b;font-size:.82rem;font-weight:700}html body #portalGate .pg-title{margin-bottom:1rem;font-size:clamp(2.6rem,5.6vw,4.9rem);line-height:1.2;font-weight:800;letter-spacing:-.025em;text-shadow:none}html[data-theme=light] body #portalGate .pg-title{color:#171b24!important;-webkit-text-fill-color:#171b24!important}html body #portalGate .pg-title span{color:var(--accent)!important;-webkit-text-fill-color:var(--accent)!important}.pg-lead{max-width:32rem;margin-bottom:1.6rem;font-size:clamp(1rem,1.35vw,1.18rem);line-height:1.9;color:#626d7e}.pg-cta{gap:.75rem}.pg-btn{min-height:3.25rem;padding:.8rem 1.45rem;border-radius:.85rem;font-size:1rem}.pg-btn-primary{background:linear-gradient(135deg,#19b89c,#0e9d87);border-color:transparent;box-shadow:0 12px 28px -16px #109982bf}.pg-btn-primary:hover{background:linear-gradient(135deg,#13a98f,#0b8e79);box-shadow:0 16px 32px -16px #109982bf}.pg-btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}.pg-btn-ghost:hover{background:#fff;border-color:#f4775266!important}.pg-stats{width:100%;gap:1rem;margin-top:clamp(1.5rem,3.6vh,2.5rem)}.pg-stats>div{min-width:7rem;display:flex;flex-direction:column;align-items:flex-start;gap:.35rem;padding-inline-start:1rem;border-inline-start:1px solid var(--line)}.pg-stats dt{font-size:.82rem;line-height:1.45;color:var(--mut)}.pg-stats dd{font-size:clamp(1.6rem,2.5vw,2.2rem);color:var(--ink)}.pg-card{padding:clamp(1.1rem,2.2vw,1.8rem);gap:.9rem;border-radius:1.65rem;background:linear-gradient(150deg,#fff,#fbfcff);border:1px solid rgba(34,49,68,.09);box-shadow:0 36px 68px -46px #22314459}html[data-theme=dark] .pg-card{background:linear-gradient(150deg,var(--card2),var(--card))}.pg-chip{position:static;display:inline-flex;margin:0 0 .55rem;padding:.28rem .8rem;border-radius:999px;transform:none;background:#f477521f;box-shadow:none;color:#db6441;font-size:.78rem}.pg-card-head{padding:0;align-items:center}.pg-card-head h3{font-size:clamp(1.1rem,1.7vw,1.4rem);font-weight:800}.pg-card-head p{font-size:.85rem;color:var(--mut)}.pg-live{background:#16ad9517;border-color:#16ad952e;color:#12876f}.pg-sim{height:clamp(16rem,36vh,23rem);border-radius:1.15rem;border:1px solid #e6ecef;background:radial-gradient(55% 70% at 55% 48%,rgba(22,173,149,.08),transparent 74%),linear-gradient(145deg,#fbfcff,#f0f8f6)}html[data-theme=dark] .pg-sim{border-color:var(--line);background:radial-gradient(60% 70% at 50% 45%,rgba(22,173,149,.13),transparent 70%),linear-gradient(145deg,#111923,#0a1119)}.pg-lbl{background:#fffffff0;border-color:#1f29371f;color:#374151;box-shadow:0 3px 10px #1f293714}html[data-theme=dark] .pg-lbl{background:#0c0f18eb;border-color:var(--line);color:var(--ink)}.pg-tag{background:#ffffffeb;color:#475569;border:1px solid rgba(31,41,55,.08)}.pg-tag-e b,.pg-tag-i b,.pg-tag-c b{color:var(--brand-fill)}.pg-stages-sec{max-width:88rem;padding:clamp(3.5rem,8vh,6rem) clamp(1rem,5vw,4rem) 2.5rem}.pg-sec-head{text-align:center;margin-bottom:2.2rem}.pg-eyebrow{padding:.24rem .8rem;margin-bottom:.65rem;color:#d85f3b;background:#f477521a;border-color:#f4775224}html body #portalGate .pg-h2{font-size:clamp(1.8rem,3.5vw,2.65rem);font-weight:800}.pg-sec-head p{font-size:1rem;color:var(--mut)}html body #portalGate .st-stages{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}html body #portalGate .st-stage,html[data-theme=light] body #portalGate .st-stage,html body #portalGate .st-stage-secondary{grid-column:auto;padding:1.2rem;background:#fff!important;border:1px solid rgba(31,41,55,.09)!important;border-radius:1.35rem!important;box-shadow:0 18px 40px -30px #1f293747!important}html[data-theme=dark] body #portalGate .st-stage,html[data-theme=dark] body #portalGate .st-stage-secondary{background:linear-gradient(180deg,var(--card2),var(--card))!important}html body #portalGate .st-stage-head{display:flex;align-items:center;gap:.85rem;margin-bottom:1rem}html body #portalGate .st-stage-icon{width:2.8rem;height:2.8rem;flex:0 0 auto;border-radius:.9rem;background:#16ad951a;border:0;color:#109982}html body #portalGate .st-stage-prep .st-stage-icon{background:#f477521f;color:#df6d47}html body #portalGate .st-stage-secondary .st-stage-icon{background:#4b7adb1a;color:#5274c8}html body #portalGate .st-stage-title{font-size:1.18rem;font-weight:800;color:var(--ink)}html body #portalGate .st-stage-sub{margin:.12rem 0 0;font-size:.78rem;color:var(--mut);line-height:1.55}html body #portalGate .st-grades{display:grid;grid-template-columns:1fr;gap:.55rem}html body #portalGate .st-grade{min-height:3.8rem;flex-direction:row!important;align-items:center!important;justify-content:flex-start;gap:.75rem;padding:.55rem .7rem;border-radius:.9rem;background:#f8fafc;border:1px solid #edf0f4;box-shadow:none;transition:transform .18s,border-color .18s,background .18s}html body #portalGate .st-grade:hover{transform:translateY(-2px);background:#fff;border-color:#16ad9547!important;box-shadow:0 10px 22px -18px #10998273}html body #portalGate .st-grade-num{width:2.15rem;height:2.15rem;display:grid;place-items:center;border-radius:.7rem;background:#fff;color:#df6d47;border:1px solid rgba(244,119,82,.13);font-size:.95rem;font-weight:800}html body #portalGate .st-stage-primary .st-grade-num{color:#109982;background:#16ad9514;border-color:transparent}html body #portalGate .st-stage-secondary .st-grade-num{color:#5274c8;background:#4b7adb14;border-color:transparent}html body #portalGate .st-grade-name{font-size:.9rem;font-weight:700;color:#303746}html[data-theme=dark] body #portalGate .st-grade{background:var(--card2);border-color:var(--line)}html[data-theme=dark] body #portalGate .st-grade-name{color:var(--ink)}.pg-foot{padding:2rem 1rem 2.5rem;color:var(--mut);font-size:.82rem}html body .bg-sky-500,html body .bg-sky-500\/20,html:not([data-theme=light]) body .bg-sky-500,html:not([data-theme=light]) body .bg-sky-500\/20,html body .sv-done,html body .st-term.on,html body .cb-btn.on,html body .vb-btn.active{background:linear-gradient(135deg,#19b89c,#0e9d87)!important;color:#fff!important;border-color:#1099822e!important;box-shadow:0 10px 24px -16px #109982cc!important}html body #subjectBadge{background:#16ad951a!important;color:#108b76!important;border-color:#16ad952e!important}html body input[type=range]::-webkit-slider-thumb,html body input[type=range].phys-slider::-webkit-slider-thumb{box-shadow:0 0 0 5px #16ad9533,0 4px 12px #00000029!important}html body .sv-q-challenge{border-color:#f4775257;background:linear-gradient(135deg,#f4775212,#16ad9506)}html body .sv-q-level{background:#f477521f;color:#c85c39}@media(max-width:1000px){html body #portalGate .st-stages{grid-template-columns:repeat(2,minmax(0,1fr))}html body #portalGate .st-stage-secondary{grid-column:auto}}@media(max-width:760px){.pg-nav{height:4.5rem}.pg-hero{grid-template-columns:minmax(0,1fr);min-height:0;gap:2rem;padding-block:2.5rem 3rem}.pg-copy{grid-row:1}.pg-card{grid-row:2}.pg-stats{gap:.85rem;margin-top:1.5rem}.pg-stats>div{min-width:6rem;padding-inline-start:.7rem}.pg-stats dt{font-size:.74rem}.pg-stats dd{font-size:1.6rem}}@media(max-width:640px){.pg-nav-in{padding-inline:1rem}.pg-nav-r{gap:.75rem}.pg-brand{gap:.5rem}.pg-brand-name{font-size:1.05rem}.pg-logo{width:2.45rem;height:2.45rem}.pg-ghost{min-height:2.55rem;padding:.45rem .9rem;font-size:.88rem}.pg-hero{padding-inline:1rem}html body #portalGate .pg-title{font-size:clamp(2.25rem,11vw,3.2rem)}.pg-stats>div{min-width:0;flex:1}.pg-card{padding:1rem;border-radius:1.2rem}.pg-card-head{align-items:flex-start}.pg-card-head p{max-width:15rem}.pg-sim{height:clamp(15rem,60vw,20rem)}html body #portalGate .st-stages{grid-template-columns:minmax(0,1fr)}html body #portalGate .st-stage{padding:1rem}.pg-stages-sec{padding-inline:1rem}}@media(min-width:761px){.pg-hero{direction:rtl}}html body #portalGate .pg-title{width:100%;text-align:right;font-size:clamp(2.25rem,4.8vw,4.2rem)}html body #portalGate .pg-btn-primary{background:linear-gradient(135deg,#f78a64,#ed6b45);border-color:transparent;box-shadow:0 12px 28px -16px #ed6b459e}html body #portalGate .pg-btn-primary:hover{background:linear-gradient(135deg,#f27650,#df5d38);box-shadow:0 16px 32px -16px #ed6b45b3}html body #portalGate .pg-btn-ghost{background:#16ad9517;border-color:#16ad9533;color:#108b76}html body #portalGate .pg-btn-ghost:hover{background:#16ad9526;border-color:#16ad9559!important}html body #portalGate .pg-iconbtn{background:#16ad9514;border-color:#16ad9526;color:#108b76}html body #portalGate .pg-iconbtn:hover{background:#16ad9524;border-color:#16ad954d!important}html body #portalGate .pg-ghost{background:#f47752;border-color:#f47752;color:#fff}html body #portalGate .pg-ghost:hover{background:#e96641;border-color:#e96641!important;color:#fff}@media(max-width:760px){html body #portalGate .pg-title{font-size:clamp(2rem,9vw,2.8rem)}}.pg-stage-hint{display:inline-flex;align-items:center;gap:.45rem;margin:.75rem 0 0!important;padding:.65rem 1rem;border:1px solid rgba(22,173,149,.18);border-radius:999px;background:#16ad9512;color:#108b76!important;font-size:.88rem!important;font-weight:600}.pg-stats>div:last-child dd{font-family:var(--font-sans);font-size:clamp(1.15rem,1.8vw,1.4rem);line-height:1.4}.pg-info-section,.pg-how-section{max-width:88rem;margin:0 auto;padding:clamp(3rem,7vh,5rem) clamp(1rem,5vw,4rem);scroll-margin-top:1rem}.pg-info-section{border-top:1px solid var(--line)}.pg-info-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}.pg-info-card{min-height:13rem;padding:1.35rem;border:1px solid var(--line);border-radius:1.25rem;background:var(--card);box-shadow:0 18px 40px -34px #1f293752;transition:transform .2s,border-color .2s,box-shadow .2s}.pg-info-card:hover{transform:translateY(-3px);border-color:#16ad9547;box-shadow:0 22px 42px -34px #10998266}.pg-info-icon{width:2.8rem;height:2.8rem;display:grid;place-items:center;margin-bottom:1rem;border-radius:.9rem;background:#16ad951a;color:#108b76;font-size:1.1rem}.pg-info-card:nth-child(2) .pg-info-icon{background:#f477521c;color:#df6d47}.pg-info-card:nth-child(3) .pg-info-icon{background:#4b7adb1a;color:#5274c8}.pg-info-card h3{margin:0 0 .55rem;color:var(--ink);font-size:1.04rem;font-weight:800}.pg-info-card p{margin:0;color:var(--mut);font-size:.9rem;line-height:1.8}.pg-how-section{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:center;gap:clamp(2rem,6vw,5rem);border-top:1px solid var(--line)}.pg-how-copy .pg-eyebrow{display:inline-block}.pg-how-copy .pg-h2{margin:.7rem 0;font-size:clamp(1.7rem,3vw,2.35rem);font-weight:800}.pg-how-copy>p{max-width:28rem;color:var(--mut);line-height:1.9}.pg-how-steps{display:grid;gap:.75rem;margin:0;padding:0;list-style:none}.pg-how-steps li{display:flex;align-items:center;gap:1rem;padding:1rem 1.1rem;border:1px solid var(--line);border-radius:1rem;background:var(--card)}.pg-how-steps li>span{width:2.5rem;height:2.5rem;flex:0 0 auto;display:grid;place-items:center;border-radius:.8rem;background:#f477521f;color:#d85f3b;font-weight:800}.pg-how-steps strong{display:block;color:var(--ink);font-size:.96rem}.pg-how-steps p{margin:.2rem 0 0;color:var(--mut);font-size:.84rem}.pg-contact-section{max-width:80rem;margin:0 auto 1rem;padding:clamp(1.4rem,3vw,2rem) clamp(1rem,3vw,2.5rem);display:flex;align-items:center;justify-content:space-between;gap:1.5rem;border:1px solid var(--line);border-radius:1.35rem;background:var(--card)}.pg-contact-section .pg-h2{margin:.55rem 0;font-size:clamp(1.5rem,2.6vw,2rem);font-weight:800}.pg-contact-section p{max-width:38rem;margin:.3rem 0 0;color:var(--mut);line-height:1.8}.pg-contact-link{display:inline-flex;align-items:center;gap:.7rem;flex:0 0 auto;padding:.9rem 1.2rem;border:1px solid rgba(22,173,149,.22);border-radius:.95rem;background:#16ad9514;color:#108b76;text-decoration:none;font-weight:700;transition:background .2s,border-color .2s,transform .2s}.pg-contact-link:hover{transform:translateY(-2px);border-color:#16ad9566;background:#16ad9521}.pg-foot{border-top:1px solid var(--line);text-align:center;line-height:1.8}@media(max-width:1000px){.pg-info-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:1050px)and (min-width:761px){.pg-nav-in{padding-inline:1rem}.pg-nav-r{gap:1rem}.pg-nav-l{gap:.4rem}.pg-links{gap:.8rem}.pg-links a{font-size:.88rem}.pg-ghost{padding-inline:.9rem}}@media(max-width:760px){.pg-info-section,.pg-how-section{padding-inline:1rem}.pg-how-section{grid-template-columns:minmax(0,1fr);gap:1.4rem}.pg-contact-section{margin-inline:1rem;align-items:stretch;flex-direction:column}.pg-contact-link{align-self:flex-start;max-width:100%;font-size:.9rem}}@media(max-width:760px){.pg-stats>div:last-child dd{font-size:1.05rem}}@media(max-width:520px){.pg-info-grid{grid-template-columns:minmax(0,1fr)}.pg-info-card{min-height:0}.pg-stage-hint{border-radius:1rem;line-height:1.6}}html body.info-page{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)!important;color:var(--ink)!important}.info-page-footer a{color:var(--mut);text-decoration:none;font-weight:600;transition:color .2s}.info-page-footer a:hover{color:#e96f4b}.info-page-main{width:min(calc(100% - 2rem),76rem);margin:0 auto;flex:1;padding:clamp(2rem,6vh,4rem) 0;direction:rtl;text-align:right}.info-page-hero{position:relative;overflow:hidden;padding:clamp(2rem,6vw,4.5rem);border:1px solid var(--line);border-radius:1.8rem;background:radial-gradient(420px 260px at 92% 8%,rgba(22,173,149,.12),transparent 75%),linear-gradient(145deg,var(--card),var(--card2));box-shadow:var(--shadow);direction:rtl;text-align:right}.info-page-kicker{display:inline-flex;margin-bottom:1rem;padding:.35rem .8rem;border-radius:999px;background:#f477521f;color:#cf5d3b;font-size:.86rem;font-weight:700}.info-page-hero h1{position:relative;z-index:1;max-width:50rem;margin:0 0 1rem;color:var(--ink);font-size:clamp(2.2rem,6vw,4rem);font-weight:800;line-height:1.25}.info-page-lead{position:relative;z-index:1;max-width:46rem;margin:0;color:var(--mut);font-size:clamp(1rem,1.8vw,1.2rem);line-height:2}.info-page-cta{position:relative;z-index:1;display:inline-flex;align-items:center;justify-content:center;gap:.8rem;margin-top:1.7rem;padding:.85rem 1.2rem;border-radius:.9rem;background:linear-gradient(135deg,#19b89c,#0e9d87);color:#fff;text-decoration:none;font-weight:700;box-shadow:0 12px 28px -16px #109982bf;transition:transform .2s,filter .2s}.info-page-cta:hover{transform:translateY(-2px);filter:brightness(.96)}.info-page-orbit{position:absolute;inset:auto -1rem -7rem auto;width:19rem;height:19rem;border:1px solid rgba(22,173,149,.16);border-radius:50%;pointer-events:none}.info-page-orbit:before,.info-page-orbit:after{position:absolute;inset:2.3rem;content:"";border:1px solid rgba(244,119,82,.18);border-radius:50%;transform:rotate(55deg) scaleX(.45)}.info-page-orbit:after{transform:rotate(-55deg) scaleX(.45)}.info-page-orbit span{position:absolute;top:20%;left:20%;width:.7rem;height:.7rem;border-radius:50%;background:#19b89c;box-shadow:0 0 18px #19b89cb3}.info-page-orbit span:nth-child(2){top:65%;left:75%;background:#f47752;box-shadow:0 0 18px #f477528c}.info-page-orbit span:nth-child(3){top:42%;left:47%;width:.45rem;height:.45rem;background:#6787ff}.info-page-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:1.2rem;direction:rtl}.info-page-card{padding:1.35rem;border:1px solid var(--line);border-radius:1.2rem;background:var(--card);box-shadow:0 18px 40px -34px #1f293752;direction:rtl;text-align:right}.info-page-card-icon{width:2.6rem;height:2.6rem;display:grid;place-items:center;margin-bottom:.9rem;border-radius:.8rem;background:#16ad951a;color:#108b76;font-family:var(--font-mono);font-size:.82rem;font-weight:700}.info-page-card h2,.info-page-contact-card h2{margin:0 0 .45rem;color:var(--ink);font-size:1.08rem;font-weight:800}.info-page-card p,.info-page-contact-card p{margin:0;color:var(--mut);font-size:.92rem;line-height:1.85}.info-page-note{margin:1.2rem 0 0;padding:1rem 1.2rem;border-right:3px solid #18ad95;border-radius:.75rem;background:#16ad950f;color:var(--ink2);line-height:1.9}.info-page-contact-main{display:flex;flex-direction:column;justify-content:center;gap:1rem}.info-page-contact-hero{padding-block:clamp(2rem,5vw,3.5rem)}.info-page-contact-card{display:flex;align-items:center;gap:1rem;padding:clamp(1.2rem,3vw,2rem);border:1px solid var(--line);border-radius:1.3rem;background:var(--card);box-shadow:var(--shadow);direction:rtl;text-align:right}.info-page-contact-icon{width:3rem;height:3rem;flex:0 0 auto;display:grid;place-items:center;border-radius:1rem;background:#16ad951a;color:#108b76;font-size:1.35rem}.info-page-contact-card>div{flex:1}.info-page-contact-card .info-page-cta{margin:0;white-space:nowrap}.info-page-back{align-self:flex-start;color:#108b76;font-weight:700;text-decoration:none}.info-page-back:hover{text-decoration:underline}.info-page-footer{width:min(calc(100% - 2rem),76rem);margin:0 auto;padding:1.3rem 0 1.8rem;display:flex;justify-content:space-between;gap:1rem;border-top:1px solid var(--line);font-size:.9rem}@media(max-width:700px){.info-page-main{padding:1.5rem 0}.info-page-hero{border-radius:1.3rem}.info-page-orbit{opacity:.45}.info-page-card-grid{grid-template-columns:minmax(0,1fr)}.info-page-contact-card{align-items:stretch;flex-direction:column}.info-page-contact-card .info-page-cta{align-self:flex-start;max-width:100%;font-size:.83rem;white-space:normal;overflow-wrap:anywhere}}@media(max-width:760px){.pg-nav-in{padding-inline:.7rem}.pg-nav-r{gap:.6rem}.pg-nav-l{gap:.3rem}.pg-brand-name{display:none}.pg-links{display:flex;align-items:center;gap:.55rem}.pg-links a{font-size:.76rem;padding:.25rem 0}.pg-links .pg-nav-home{padding:.24rem .5rem}.pg-iconbtn{width:2.35rem;height:2.35rem}}html body .sv-live-equation{grid-template-columns:minmax(0,1fr);gap:.55rem;padding:.85rem .95rem;background:linear-gradient(135deg,#0d1728,#17243b)!important;border:1px solid rgba(94,139,255,.3)!important;border-inline-start:4px solid #19b89c!important;box-shadow:0 12px 28px -22px #071022a6}html body .sv-live-equation-title{justify-self:start!important;direction:rtl;color:#55dbc4!important;font-size:.9rem!important;font-weight:900;line-height:1.5}html body .sv-live-equation-value{display:block;box-sizing:border-box;width:100%;min-height:2.7rem;padding:.65rem .8rem;border:1px solid rgba(255,255,255,.12);border-radius:.65rem;background:#ffffff13;color:#f5f7ff!important;font-size:clamp(.9rem,1.1vw,1.05rem)!important;font-weight:800;line-height:1.8;text-align:left;white-space:normal;overflow-wrap:anywhere}html body .phys-live-equation-strip{display:grid!important;grid-template-columns:minmax(0,1fr);justify-items:stretch;gap:.55rem;padding:.85rem .95rem!important;border:1px solid rgba(94,139,255,.3)!important;border-inline-start:4px solid #19b89c!important;border-radius:.9rem;background:linear-gradient(135deg,#0d1728,#17243b)!important}html body .phys-live-equation-strip>span{justify-self:start;color:#55dbc4!important;font-size:.9rem!important;line-height:1.5}html body #physLiveFormulaBar{box-sizing:border-box;width:100%;min-width:0;padding:.65rem .8rem;border:1px solid rgba(255,255,255,.12);border-radius:.65rem;background:#ffffff13;color:#f5f7ff!important;font-size:clamp(.9rem,1.1vw,1.05rem)!important;line-height:1.8;white-space:normal;overflow-wrap:anywhere}html body .sv-revision{border-color:#16ad9547!important;background:linear-gradient(135deg,rgba(22,173,149,.08),var(--card))!important}html body .sv-revision[open]{border-color:#16ad956b!important;background:linear-gradient(135deg,rgba(22,173,149,.11),var(--card))!important}html body .sv-revision-entry{color:#108b76!important;font-weight:800}html body .sv-revision-entry.on{border-color:#16ad956b!important;background:#16ad951f!important;color:#087965!important}html[data-theme=dark] body .sv-revision-entry,html[data-theme=dark] body .sv-revision-entry.on{color:#72ddc7!important}#pgAbout,#pgHowItWorks,#pgContact{content-visibility:auto;contain-intrinsic-size:auto 640px}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}