:root {
  --q-ink: #10233d;
  --q-muted: #60708a;
  --q-blue: #2867e8;
  --q-violet: #7758e8;
  --q-cyan: #14b8c4;
  --q-navy: #07182d;
  --q-soft: #f4f7ff;
  --q-line: #dfe7f3;
  --q-card: rgba(255,255,255,.94);
}

.quantum-page { background: #f7f9fc; color: var(--q-ink); min-height: 70vh; }
.quantum-page * { box-sizing: border-box; }
.q-shell { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }

.q-hero {
  position: relative; overflow: hidden; padding: 88px 0 76px;
  background:
    radial-gradient(circle at 78% 28%, rgba(70,117,255,.32), transparent 25%),
    radial-gradient(circle at 18% 85%, rgba(119,88,232,.30), transparent 30%),
    linear-gradient(135deg, #061425 0%, #0b2344 55%, #101b39 100%);
  color: white;
}
.q-hero::before, .q-hero::after { content:""; position:absolute; border:1px solid rgba(255,255,255,.13); border-radius:50%; }
.q-hero::before { width:430px; height:430px; right:-130px; top:-140px; }
.q-hero::after { width:280px; height:280px; right:80px; top:-80px; }
.q-grid-bg { position:absolute; inset:0; opacity:.18; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size:48px 48px; mask-image:linear-gradient(to bottom,black,transparent); }
.q-hero-content { position:relative; z-index:2; display:grid; grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr); gap:56px; align-items:center; }
.q-eyebrow { display:inline-flex; align-items:center; gap:9px; padding:8px 13px; border:1px solid rgba(255,255,255,.2); border-radius:999px; background:rgba(255,255,255,.08); font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; font-weight:700; }
.q-hero h1 { margin:18px 0 18px; font-size:clamp(2.5rem,6vw,5.1rem); line-height:.99; letter-spacing:-.045em; max-width:830px; }
.q-gradient-text { background:linear-gradient(90deg,#94d8ff,#b7a8ff 48%,#76f2e2); -webkit-background-clip:text; color:transparent; }
.q-hero-copy { max-width:700px; font-size:1.13rem; line-height:1.75; color:#d9e5f6; }
.q-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:28px; }
.q-btn { display:inline-flex; align-items:center; gap:9px; border-radius:12px; padding:12px 18px; text-decoration:none; font-weight:700; transition:.2s ease; }
.q-btn-primary { background:white; color:#0b2344; box-shadow:0 10px 30px rgba(0,0,0,.18); }
.q-btn-secondary { color:white; border:1px solid rgba(255,255,255,.24); background:rgba(255,255,255,.08); }
.q-btn:hover { transform:translateY(-2px); }

.q-orbit-card { position:relative; aspect-ratio:1/1; max-width:410px; margin:auto; border-radius:32px; background:linear-gradient(145deg,rgba(255,255,255,.13),rgba(255,255,255,.04)); border:1px solid rgba(255,255,255,.16); box-shadow:inset 0 1px rgba(255,255,255,.12),0 24px 80px rgba(0,0,0,.28); backdrop-filter:blur(12px); }
.q-orbit, .q-orbit::before { position:absolute; border:1px solid rgba(154,210,255,.35); border-radius:50%; content:""; }
.q-orbit { inset:16%; transform:rotate(32deg); }
.q-orbit::before { inset:17%; transform:rotate(68deg); }
.q-core { position:absolute; width:72px; height:72px; border-radius:50%; left:50%; top:50%; transform:translate(-50%,-50%); background:radial-gradient(circle at 35% 30%,#fff,#65d9ff 24%,#6b67f4 65%,#311b73); box-shadow:0 0 38px rgba(102,190,255,.65); }
.q-electron { position:absolute; width:14px; height:14px; border-radius:50%; background:#fff; box-shadow:0 0 18px #7fe5ff; animation:qFloat 5s ease-in-out infinite; }
.q-e1 { left:17%; top:45%; }.q-e2 { right:21%; top:27%; animation-delay:-1.7s }.q-e3 { right:28%; bottom:19%; animation-delay:-3.1s }
@keyframes qFloat { 0%,100%{transform:translateY(-5px) scale(.9)} 50%{transform:translateY(7px) scale(1.12)} }
.q-state-label { position:absolute; left:50%; bottom:7%; transform:translateX(-50%); font-family:Georgia,serif; color:#e8f3ff; font-size:1.15rem; white-space:nowrap; }

.q-section { padding:68px 0; }
.q-section-head { display:flex; justify-content:space-between; gap:30px; align-items:end; margin-bottom:28px; }
.q-section-head h2 { margin:0; font-size:clamp(1.75rem,3vw,2.5rem); letter-spacing:-.03em; }
.q-section-head p { margin:8px 0 0; color:var(--q-muted); max-width:660px; line-height:1.7; }
.q-topic-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px; }
.q-card { position:relative; overflow:hidden; background:white; border:1px solid var(--q-line); border-radius:20px; padding:24px; text-decoration:none; color:inherit; box-shadow:0 8px 28px rgba(28,58,99,.06); transition:transform .23s ease,box-shadow .23s ease,border-color .23s ease; }
.q-card:hover { transform:translateY(-5px); box-shadow:0 18px 44px rgba(28,58,99,.12); border-color:#c7d5ec; }
.q-card::after { content:""; position:absolute; width:110px; height:110px; border-radius:50%; right:-45px; top:-55px; background:linear-gradient(145deg,rgba(40,103,232,.13),rgba(119,88,232,.11)); }
.q-card-icon { width:46px; height:46px; border-radius:13px; display:grid; place-items:center; background:linear-gradient(135deg,#eef4ff,#f1edff); color:var(--q-violet); font-size:1.12rem; margin-bottom:18px; }
.q-card-kicker { font-size:.74rem; text-transform:uppercase; letter-spacing:.09em; color:var(--q-blue); font-weight:800; }
.q-card h3 { margin:8px 0 10px; font-size:1.22rem; line-height:1.3; }
.q-card p { color:var(--q-muted); margin:0 0 20px; line-height:1.6; font-size:.95rem; }
.q-meta { display:flex; align-items:center; gap:12px; font-size:.8rem; color:#7b8ba3; }
.q-live { display:inline-flex; gap:6px; align-items:center; color:#0b8d94; font-weight:700; }.q-live::before { content:""; width:7px; height:7px; border-radius:50%; background:#15c4bd; box-shadow:0 0 0 4px rgba(21,196,189,.12); }
.q-category { margin-top:44px; }
.q-category-title { display:flex; align-items:center; gap:12px; margin-bottom:17px; }
.q-category-title span { display:grid; place-items:center; width:34px; height:34px; border-radius:10px; background:#eaf0ff; color:var(--q-blue); }
.q-category-title h2 { margin:0; font-size:1.45rem; }
.q-empty { border:1px dashed #cbd8ea; border-radius:20px; padding:42px; text-align:center; color:var(--q-muted); background:white; }

/* Article */
.q-article-hero { padding:62px 0 48px; background:linear-gradient(135deg,#061425,#10294a); color:white; }
.q-breadcrumb { color:#a9bad3; font-size:.88rem; margin-bottom:18px; }.q-breadcrumb a{color:#a9d8ff;text-decoration:none}
.q-article-hero h1 { font-size:clamp(2.2rem,5vw,4.3rem); letter-spacing:-.04em; line-height:1.05; max-width:920px; margin:8px 0 18px; }
.q-article-deck { max-width:780px; color:#d3deed; line-height:1.7; font-size:1.08rem; }
.q-article-meta { display:flex; flex-wrap:wrap; gap:18px; margin-top:24px; color:#b9c8dd; font-size:.9rem; }
.q-reading-layout { display:grid; grid-template-columns:minmax(0,760px) 260px; gap:54px; align-items:start; padding:52px 0; }
.q-prose { font-family:Georgia,'Times New Roman',serif; font-size:1.08rem; line-height:1.82; color:#26384f; }
.q-prose h2,.q-prose h3 { font-family:'Segoe UI',sans-serif; color:#132944; letter-spacing:-.02em; margin-top:2em; }
.q-prose h2 { font-size:1.75rem; }.q-prose h3{font-size:1.3rem}
.q-prose code { font-family:Consolas,monospace; font-size:.92em; background:#eef3fa; padding:.1em .35em; border-radius:5px; }
.q-prose pre { background:#0a1728; color:#e9f3ff; border-radius:14px; padding:18px; overflow:auto; line-height:1.55; }
.q-prose blockquote { margin:1.6em 0; padding:2px 0 2px 20px; border-left:4px solid var(--q-violet); color:#4c5e75; }
.q-side { position:sticky; top:20px; }
.q-side-card { border:1px solid var(--q-line); border-radius:16px; background:white; padding:18px; box-shadow:0 8px 24px rgba(28,58,99,.05); }
.q-side-card h4 { margin:0 0 12px; }.q-side-card a { display:block; padding:9px 0; color:#486079; text-decoration:none; border-bottom:1px solid #edf1f6; font-size:.9rem; }.q-side-card a:last-child{border-bottom:0}.q-side-card a:hover{color:var(--q-blue)}

/* Interactive laboratory */
.q-lab { margin:32px 0 42px; border:1px solid #cbd9ee; border-radius:22px; overflow:hidden; background:linear-gradient(180deg,#fff,#f7faff); box-shadow:0 18px 50px rgba(37,77,131,.10); font-family:'Segoe UI',sans-serif; }
.q-lab-head { padding:18px 22px; background:#0b1c31; color:white; display:flex; align-items:center; justify-content:space-between; gap:15px; }
.q-lab-head strong { display:flex; align-items:center; gap:9px; }.q-lab-head span{font-size:.78rem;color:#9fdcec;text-transform:uppercase;letter-spacing:.08em;font-weight:700}
.q-lab-body { display:grid; grid-template-columns:minmax(0,1fr) 260px; min-height:390px; }
.q-stage { position:relative; min-height:390px; display:grid; place-items:center; padding:20px; background:radial-gradient(circle at 50% 45%,#fbfdff,#eef4fb); }
.q-controls { padding:22px; border-left:1px solid var(--q-line); background:white; }
.q-control { margin-bottom:20px; }.q-control label{display:flex;justify-content:space-between;font-size:.84rem;font-weight:700;color:#314860;margin-bottom:8px}.q-control input[type=range]{width:100%;accent-color:var(--q-violet)}
.q-state-box { background:#f3f6fb; border:1px solid #dce5f1; border-radius:12px; padding:12px; font-family:Georgia,serif; text-align:center; font-size:.95rem; overflow-wrap:anywhere; }
.q-small-btn { width:100%; border:0; border-radius:10px; padding:10px 12px; background:#1b5fe3; color:white; font-weight:700; cursor:pointer; margin-top:8px; }.q-small-btn:hover{filter:brightness(.95)}
.q-canvas { width:min(100%,500px); height:auto; display:block; }
.q-prob-bars { width:min(92%,460px); }.q-bar-row{display:grid;grid-template-columns:40px 1fr 58px;align-items:center;gap:10px;margin:18px 0}.q-track{height:16px;border-radius:999px;background:#e3eaf4;overflow:hidden}.q-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--q-blue),var(--q-violet));transition:width .35s ease}.q-bar-label{font-family:Georgia,serif;font-size:1.05rem}.q-bar-value{text-align:right;font-size:.82rem;font-weight:700;color:#536a83}
.q-pulsing-dot { width:16px;height:16px;border-radius:50%;background:#7758e8;box-shadow:0 0 0 0 rgba(119,88,232,.45);animation:qPulse 1.6s infinite}@keyframes qPulse{70%{box-shadow:0 0 0 15px rgba(119,88,232,0)}100%{box-shadow:0 0 0 0 rgba(119,88,232,0)}}
.q-nav-articles { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin:35px 0; }.q-nav-link{border:1px solid var(--q-line);border-radius:14px;padding:16px;text-decoration:none;color:var(--q-ink);background:#fff}.q-nav-link small{display:block;color:#8190a5;margin-bottom:5px}.q-nav-link.q-next{text-align:right}

@media(max-width:900px){.q-hero-content,.q-reading-layout{grid-template-columns:1fr}.q-orbit-card{display:none}.q-topic-grid{grid-template-columns:repeat(2,1fr)}.q-side{position:static}.q-lab-body{grid-template-columns:1fr}.q-controls{border-left:0;border-top:1px solid var(--q-line)}}
@media(max-width:620px){.q-hero{padding:62px 0 54px}.q-topic-grid{grid-template-columns:1fr}.q-shell{width:min(100% - 24px,1180px)}.q-section{padding:48px 0}.q-stage{min-height:320px}.q-nav-articles{grid-template-columns:1fr}.q-article-hero{padding:46px 0 36px}}
@media(prefers-reduced-motion:reduce){.q-electron,.q-pulsing-dot{animation:none}.q-card,.q-btn{transition:none}}

/* ========================================================================== */
/* Quantum Learning Experience v2                                             */
/* ========================================================================== */
.q-home{background:#f7f9fd}.q-hero-v2{padding:88px 0 78px;overflow:hidden;isolation:isolate}.q-hero-v2 .q-hero-content{grid-template-columns:minmax(0,1.12fr) minmax(340px,.88fr);gap:72px}.q-hero-copy-wrap{position:relative;z-index:2;background:transparent!important;backdrop-filter:none!important}.q-hero-copy-wrap::before,.q-hero-copy-wrap::after{content:none!important}.q-hero-stats{display:flex;gap:30px;margin-top:34px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);max-width:650px}.q-hero-stats div{display:flex;flex-direction:column}.q-hero-stats strong{font-size:1.3rem;color:#fff}.q-hero-stats span{font-size:.76rem;color:#9db2ce;text-transform:uppercase;letter-spacing:.08em;margin-top:3px}
.q-hero-visual{position:relative;min-height:390px;display:grid;place-items:center}.q-bloch-mini{--hero-angle:36deg;--hero-length:122px;--hero-x:52px;--hero-y:-95px;width:300px;height:300px;border:1.5px solid rgba(153,208,255,.32);border-radius:50%;position:relative;box-shadow:inset 0 0 64px rgba(49,128,255,.07),0 0 58px rgba(93,80,231,.10)}.q-bloch-ring{position:absolute;inset:49% 3%;height:2%;border:1.5px solid rgba(132,190,246,.35);border-radius:50%;transform:rotate(-12deg)}.q-ring-b{inset:3% 49%;width:2%;height:94%;transform:rotate(48deg)}.q-bloch-axis{position:absolute;left:50%;top:-8%;height:116%;width:1px;background:linear-gradient(transparent,#718db2 14%,#718db2 86%,transparent)}.q-bloch-vector{position:absolute;left:50%;top:50%;width:6px;height:var(--hero-length);border-radius:8px;background:linear-gradient(#57d8ea,#8f6bff);transform-origin:50% 100%;transform:translate(-50%,-100%) rotate(var(--hero-angle));box-shadow:0 0 16px rgba(87,216,234,.30);transition:transform .18s linear,height .18s linear;will-change:transform,height}.q-bloch-node{position:absolute;left:calc(50% + var(--hero-x));top:calc(50% + var(--hero-y));transform:translate(-50%,-50%);width:14px;height:14px;border-radius:50%;background:#c8fbff;box-shadow:0 0 0 7px rgba(121,233,245,.12),0 0 18px rgba(120,233,245,.75);animation:qHeroPulse 3.2s ease-in-out infinite;transition:left .18s linear,top .18s linear;will-change:left,top}.q-ket-zero,.q-ket-one{position:absolute;left:53%;color:#bcd1e8;font-family:Georgia,serif}.q-ket-zero{top:-11%}.q-ket-one{bottom:-11%}.q-state-chip,.q-floating-chip{position:absolute;border:1px solid rgba(157,200,238,.18);background:rgba(11,28,49,.72);backdrop-filter:blur(10px);color:#e8f4ff;border-radius:12px;padding:10px 15px;font-family:Georgia,serif;box-shadow:0 12px 30px rgba(0,0,0,.15)}.q-state-chip{bottom:4%;left:50%;transform:translateX(-50%);white-space:nowrap}.q-floating-chip{font-family:'Segoe UI',sans-serif;font-size:.78rem;color:#aeeefa}.q-chip-a{left:0;top:18%}.q-chip-b{right:-2%;top:46%}
@keyframes qHeroPulse{0%,100%{transform:translate(-50%,-50%) scale(1)}50%{transform:translate(-50%,-50%) scale(1.08)}}
.q-section-kicker,.q-box-kicker,.q-module-kicker{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.13em;color:#5268cf;margin-bottom:8px}.q-centered{text-align:center;display:block;max-width:760px;margin:0 auto 34px}.q-centered p{max-width:720px;margin:10px auto 0}.q-method-section{background:#fff;border-bottom:1px solid #e7edf5}.q-method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.q-method-card{position:relative;padding:26px 22px;border:1px solid #e2e8f2;border-radius:20px;background:linear-gradient(180deg,#fff,#fafcff);box-shadow:0 12px 34px rgba(26,55,92,.05)}.q-method-card>span{position:absolute;right:18px;top:14px;font-size:2rem;font-weight:800;color:#edf1f8}.q-method-card i{font-size:1.3rem;color:#5668d9;margin-bottom:18px}.q-method-card h3{margin:0 0 8px;font-size:1rem}.q-method-card p{margin:0;color:#667890;line-height:1.55;font-size:.88rem}
.q-path-section{background:#f7f9fd}.q-path-head{align-items:flex-end}.q-progress-card{width:260px;background:#fff;border:1px solid #e0e7f1;border-radius:16px;padding:16px 17px;box-shadow:0 9px 28px rgba(26,55,92,.06)}.q-progress-top{display:flex;justify-content:space-between;gap:10px;font-size:.82rem;color:#687b91}.q-progress-top strong{color:#172d48}.q-progress-track{height:8px;border-radius:999px;background:#e9eef5;margin:11px 0 8px;overflow:hidden}.q-progress-track div{height:100%;width:0;background:linear-gradient(90deg,#246ee9,#7758e8);border-radius:999px;transition:width .35s}.q-progress-card small{color:#8a98aa;font-size:.7rem}.q-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:30px 0 38px}.q-search{flex:1;max-width:620px;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #dce4ef;border-radius:14px;padding:0 15px;box-shadow:0 7px 22px rgba(32,60,98,.04)}.q-search i{color:#8291a4}.q-search input{width:100%;border:0;outline:0;padding:14px 0;background:transparent;color:#23384f;font-size:.94rem}.q-filter-row{display:flex;gap:7px}.q-filter{border:1px solid #dce4ef;background:#fff;color:#60738a;border-radius:999px;padding:9px 13px;font-size:.78rem;font-weight:700;cursor:pointer}.q-filter.active,.q-filter:hover{background:#142e50;color:#fff;border-color:#142e50}
.q-learning-path{display:flex;flex-direction:column;gap:48px}.q-path-module{display:grid;grid-template-columns:72px minmax(0,1fr);gap:24px}.q-module-rail{position:relative;display:flex;justify-content:center}.q-module-rail:after{content:"";position:absolute;top:52px;bottom:-55px;width:1px;background:linear-gradient(#c6d4e6,#e7edf5)}.q-path-module:last-child .q-module-rail:after{display:none}.q-module-rail span{position:sticky;top:18px;width:52px;height:52px;border-radius:16px;background:#102844;color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:0 10px 25px rgba(16,40,68,.18)}.q-module-main{min-width:0}.q-module-head{display:flex;justify-content:space-between;align-items:start;gap:30px;margin-bottom:18px}.q-module-head h2{font-size:1.75rem;margin:0;color:#162d49}.q-module-head h3{font-size:.92rem;margin:5px 0 7px;color:#5268cf;font-weight:700}.q-module-head p{margin:0;color:#677990;max-width:700px;line-height:1.55}.q-module-count{white-space:nowrap;background:#eaf0fb;color:#5e7188;border-radius:999px;padding:8px 12px;font-size:.74rem;font-weight:700}.q-topic-grid-v2{grid-template-columns:repeat(3,minmax(0,1fr))}.q-lesson-card{position:relative;min-height:270px;display:flex;flex-direction:column}.q-card-top{display:flex;justify-content:space-between;align-items:start}.q-complete-dot{display:none;width:26px;height:26px;border-radius:50%;background:#dff7ea;color:#168752;place-items:center;font-size:.7rem}.q-lesson-card.is-complete .q-complete-dot{display:grid}.q-lesson-card .q-card-kicker{font-size:.69rem;letter-spacing:.08em}.q-card-arrow{margin-top:auto;padding-top:16px;color:#386bd8;font-size:.79rem;font-weight:700}.q-card-arrow i{margin-left:6px;transition:transform .2s}.q-lesson-card:hover .q-card-arrow i{transform:translateX(4px)}.q-no-results{text-align:center;padding:50px 20px;background:#fff;border:1px dashed #ccd7e6;border-radius:20px;color:#6a7b90}.q-no-results i{font-size:1.5rem}.q-no-results h3{color:#1d3653}
/* Lesson page */
.q-article-hero-v2{padding:52px 0 46px}.q-breadcrumb{display:flex;align-items:center;gap:9px}.q-breadcrumb i{font-size:.58rem;color:#667f9f}.q-lesson-heading-grid{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:55px;align-items:end}.q-lesson-status-card{border:1px solid rgba(167,202,236,.16);background:rgba(255,255,255,.055);border-radius:18px;padding:17px;display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:center}.q-status-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:rgba(101,191,235,.13);color:#95e9ef}.q-lesson-status-card small{display:block;color:#91a9c5;font-size:.7rem}.q-lesson-status-card strong{font-size:.88rem}.q-lesson-status-card button{grid-column:1/-1;border:1px solid rgba(166,204,236,.22);background:rgba(255,255,255,.07);color:#dceafb;border-radius:10px;padding:9px 11px;cursor:pointer;font-weight:700;font-size:.78rem}.q-lesson-status-card.is-complete button{background:#1c8b64;border-color:#1c8b64}.q-reading-layout-v2{grid-template-columns:minmax(0,780px) 275px}.q-learning-box{display:grid;grid-template-columns:46px 1fr;gap:16px;border:1px solid #dbe5f0;border-radius:18px;background:linear-gradient(135deg,#fff,#f7faff);padding:22px;margin:0 0 22px}.q-learning-box-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:#e9efff;color:#5268cf}.q-learning-box h2{font-size:1.08rem;margin:0 0 10px;color:#1e3652}.q-learning-box ul{margin:0;padding-left:20px;color:#52657b;line-height:1.65}.q-prereq{display:flex;flex-wrap:wrap;gap:7px;align-items:center;border-left:3px solid #6d68dc;padding:10px 14px;background:#f5f4ff;color:#55667d;border-radius:0 10px 10px 0;font-size:.82rem;margin:0 0 26px}.q-prereq i{color:#6d68dc}.q-prereq span{font-weight:600}.q-prereq b{color:#a0aabd}
.q-lab-v2{margin-top:26px}.q-lab-v2 .q-lab-head>div{display:flex;align-items:center;gap:12px}.q-lab-number{background:#163b61;border-radius:7px;padding:4px 7px;color:#8ee8ef!important;font-size:.62rem!important}.q-lab-instruction{display:flex;gap:10px;align-items:start;padding:11px 20px;background:#eff9fb;border-bottom:1px solid #d9edf0;color:#496a75;font-size:.82rem;line-height:1.5}.q-lab-instruction i{margin-top:3px;color:#1ca1ad}.q-prose{font-family:system-ui,-apple-system,'Segoe UI',sans-serif;font-size:1rem;line-height:1.78}.q-prose h2{scroll-margin-top:25px;font-size:1.65rem;border-top:1px solid #edf1f6;padding-top:26px}.q-prose h2:first-child{border-top:0;padding-top:0}.q-prose p{margin:1em 0;color:#344a61}.q-prose mjx-container{overflow-x:auto;overflow-y:hidden;padding:5px 0}.q-takeaways{margin-top:34px;border-color:#d7eadf;background:linear-gradient(135deg,#fff,#f6fcf8)}.q-takeaways .q-learning-box-icon{background:#e2f6ea;color:#19875a}
.q-checkpoint{margin:36px 0;border:1px solid #d8e2ee;border-radius:20px;background:#fff;box-shadow:0 12px 35px rgba(29,57,93,.06);padding:24px}.q-checkpoint-head{display:grid;grid-template-columns:46px 1fr;gap:15px;align-items:start}.q-checkpoint-head>span{width:46px;height:46px;border-radius:14px;background:#f0ebff;color:#704fd4;display:grid;place-items:center}.q-checkpoint h2{margin:0;font-size:1.15rem;color:#1b344f;line-height:1.45}.q-answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}.q-answer{border:1px solid #dce4ed;background:#f9fbfd;border-radius:12px;padding:12px;text-align:left;color:#40566e;cursor:pointer;display:flex;align-items:center;gap:10px;line-height:1.4}.q-answer span{width:25px;height:25px;flex:0 0 25px;border-radius:8px;background:#e9eef5;display:grid;place-items:center;font-size:.74rem;font-weight:800}.q-answer:hover{border-color:#8ba2d6;background:#f6f8ff}.q-answer.correct{border-color:#4eb17e;background:#ecfaf3;color:#216c4a}.q-answer.wrong{border-color:#df7d7d;background:#fff1f1;color:#9f4444}.q-feedback{margin-top:14px;border-radius:12px;padding:13px 15px;background:#f3f7fb;color:#54687f}.q-feedback div{font-weight:800;color:#203951;margin-bottom:4px}.q-feedback p{margin:0;line-height:1.5;font-size:.86rem}.q-nav-articles-v2{padding-top:15px;border-top:1px solid #e8edf3}.q-side-v2{display:flex;flex-direction:column;gap:16px;top:18px}.q-toc-card nav a{display:block;padding:7px 0 7px 13px;border-left:2px solid #e5ebf2;border-bottom:0;color:#65788e}.q-toc-card nav a.active{border-left-color:#5268cf;color:#4058c5;font-weight:700}.q-toc-loading{font-size:.8rem;color:#8a98aa}.q-notation-card p{font-size:.8rem;color:#6c7d90;margin:8px 0}.q-notation-card strong{display:inline-block;min-width:55px;color:#223a55;font-family:Georgia,serif}
@media(max-width:1000px){.q-topic-grid-v2{grid-template-columns:repeat(2,minmax(0,1fr))}.q-method-grid{grid-template-columns:repeat(2,1fr)}.q-lesson-heading-grid{grid-template-columns:1fr}.q-lesson-status-card{max-width:330px}.q-reading-layout-v2{grid-template-columns:1fr}.q-side-v2{position:static;display:grid;grid-template-columns:1fr 1fr}.q-toc-card{display:none}}
@media(max-width:760px){.q-hero-v2 .q-hero-content{grid-template-columns:1fr}.q-hero-visual{display:none}.q-hero-stats{gap:18px}.q-path-head,.q-toolbar,.q-module-head{flex-direction:column;align-items:stretch}.q-progress-card{width:auto}.q-filter-row{overflow-x:auto}.q-path-module{grid-template-columns:1fr}.q-module-rail{justify-content:flex-start}.q-module-rail:after{display:none}.q-topic-grid-v2{grid-template-columns:1fr}.q-answer-grid{grid-template-columns:1fr}.q-side-v2{grid-template-columns:1fr}.q-lesson-status-card{max-width:none}}
@media(max-width:520px){.q-method-grid{grid-template-columns:1fr}.q-hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.q-hero-stats strong{font-size:1.05rem}.q-hero-stats span{font-size:.6rem}.q-learning-box{grid-template-columns:1fr}.q-learning-box-icon{width:40px;height:40px}.q-checkpoint{padding:18px}}

/* --------------------------------------------------------------------------
   Sinusoidal function + phasor interactive lesson
   -------------------------------------------------------------------------- */
.q-sine-stage-grid{width:100%;display:grid;grid-template-columns:minmax(0,1.55fr) minmax(280px,.75fr);gap:16px;align-items:stretch;padding:4px}
.q-sine-panel{min-width:0;border:1px solid #dfe8f5;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);box-shadow:0 10px 30px rgba(35,66,110,.06);overflow:hidden}
.q-sine-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 16px;border-bottom:1px solid #e8eef7;background:rgba(248,251,255,.9)}
.q-sine-panel-head span{font-size:.68rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#74859b}
.q-sine-panel-head strong{font-family:Georgia,serif;font-size:.95rem;color:#203a59}
.q-sine-svg,.q-phasor-svg{display:block;width:100%;height:auto}
.q-sine-grid{stroke:#edf1f7;stroke-width:1}
.q-sine-axis{stroke:#9db0c6;stroke-width:1.25}
.q-sine-axis-text{font-size:12px;fill:#7c8da1;font-family:Arial,sans-serif}
.q-sine-axis-title{font-size:14px;fill:#40556e;font-family:Georgia,serif;font-weight:700}
.q-sine-path{fill:none;stroke:#4f63db;stroke-width:4;stroke-linecap:round;filter:drop-shadow(0 3px 4px rgba(79,99,219,.18))}
.q-sine-reference{fill:none;stroke:#aab6c8;stroke-width:2;stroke-dasharray:7 7;opacity:.78}
.q-sine-cursor{stroke:#14a6b3;stroke-width:1.5;stroke-dasharray:5 5;opacity:.8}
.q-sine-point{fill:#14a6b3;stroke:#fff;stroke-width:3;filter:drop-shadow(0 2px 5px rgba(20,166,179,.35))}
.q-sine-legend{display:flex;justify-content:flex-end;gap:16px;flex-wrap:wrap;padding:0 15px 13px;color:#718299;font-size:.73rem}
.q-sine-legend span{display:inline-flex;align-items:center;gap:6px}.q-legend-line{width:23px;height:3px;border-radius:5px;display:inline-block}.q-legend-line.live{background:#4f63db}.q-legend-line.ref{height:0;border-top:2px dashed #aab6c8}
.q-phasor-circle{fill:#fbfdff;stroke:#dbe5f1;stroke-width:1.5}
.q-phasor-vector{stroke:#7458e8;stroke-width:5;stroke-linecap:round;filter:drop-shadow(0 3px 5px rgba(116,88,232,.22))}
.q-phasor-projection{stroke:#14a6b3;stroke-width:2;stroke-dasharray:5 5}.q-phasor-angle{fill:none;stroke:#f0a34a;stroke-width:3}.q-phasor-theta{fill:#b56d20;font-size:16px;font-family:Georgia,serif;font-style:italic}
.q-phasor-value{text-align:center;margin:-7px 14px 16px;padding:10px;border-radius:10px;background:#f0f5ff;color:#53677f;font-size:.82rem}.q-phasor-value strong{color:#253f5d;font-size:1rem}
.q-sine-mode-switch{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding:5px;background:#eef3fb;border-radius:12px;margin-bottom:17px}
.q-mode-btn{appearance:none;border:0;background:transparent;border-radius:9px;padding:9px 6px;color:#65778d;font-size:.72rem;font-weight:800;cursor:pointer;transition:.18s ease}.q-mode-btn:hover{color:#4058c5}.q-mode-btn.active{background:#fff;color:#4058c5;box-shadow:0 3px 10px rgba(47,69,110,.10)}
.q-controls input[type=range]:disabled{opacity:.28;cursor:not-allowed}.q-controls input[type=range]:disabled+*{opacity:.45}
.q-sine-transport{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin:15px 0 13px}.q-sine-transport .q-small-btn{justify-content:center;margin:0;padding:10px 8px}.q-sine-pause{background:#536a83!important}.q-sine-reset{background:#fff!important;color:#536a83!important;border:1px solid #d7e0eb!important}
.q-sine-readout{border:1px solid #dce5f1;border-radius:13px;background:#f8fbff;padding:13px}.q-sine-readout small{display:block;color:#7f8ea2;text-transform:uppercase;letter-spacing:.09em;font-size:.62rem;font-weight:800;margin-bottom:5px}.q-sine-readout>div>strong{display:block;color:#243e5d;font-family:Georgia,serif;font-size:.93rem;line-height:1.45;overflow-wrap:anywhere}
.q-sine-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:7px;margin-top:11px}.q-sine-metrics span{background:#fff;border:1px solid #e4eaf3;border-radius:9px;padding:8px;color:#64778e;font-size:.75rem}.q-sine-metrics b{display:block;color:#4058c5;font-size:.62rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:2px}
.q-sine-prompt{display:flex;gap:9px;align-items:flex-start;margin-top:10px;padding:11px 12px;border-radius:11px;background:#fff8e8;color:#785f2c;font-size:.76rem;line-height:1.45}.q-sine-prompt i{color:#d79b2c;margin-top:2px}
@media(max-width:980px){.q-sine-stage-grid{grid-template-columns:1fr}.q-sine-phasor-panel{max-width:480px;width:100%;margin:0 auto}}
@media(max-width:600px){.q-sine-mode-switch{grid-template-columns:repeat(2,1fr)}.q-sine-panel-head{align-items:flex-start;flex-direction:column}.q-sine-panel-head strong{font-size:.84rem}.q-sine-metrics{grid-template-columns:1fr 1fr}.q-sine-transport{grid-template-columns:1fr}.q-sine-stage-grid{padding:0;gap:10px}}

/* --------------------------------------------------------------------------
   Sinusoidal laboratory v4 — visualization-first layout
   -------------------------------------------------------------------------- */
.q-lab[data-quantum-lab="sinusoid"] .q-lab-body{
  display:flex;
  flex-direction:column;
  min-height:0;
}
.q-lab[data-quantum-lab="sinusoid"] .q-stage{
  min-height:0;
  padding:28px 28px 18px;
  background:
    radial-gradient(circle at 12% 12%,rgba(69,105,224,.055),transparent 26%),
    radial-gradient(circle at 88% 18%,rgba(20,166,179,.045),transparent 24%),
    linear-gradient(180deg,#f8fbff 0%,#f4f8fd 100%);
}
.q-lab[data-quantum-lab="sinusoid"] .q-controls{
  border-left:0;
  border-top:1px solid #dce6f2;
  padding:22px 28px 26px;
  background:#fff;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-stage-grid{
  grid-template-columns:minmax(0,1.48fr) minmax(340px,.82fr);
  gap:22px;
  padding:0;
  max-width:1240px;
  margin:0 auto;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-panel{
  border-radius:20px;
  box-shadow:0 14px 34px rgba(35,66,110,.075);
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-panel-head{
  min-height:64px;
  padding:15px 20px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-panel-head span{
  font-size:.73rem;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-panel-head strong{
  font-size:1.08rem;
  white-space:nowrap;
  letter-spacing:.005em;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-wave-panel .q-sine-svg{
  min-height:330px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-svg{
  max-height:355px;
  margin:auto;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-axis-text{
  font-size:15px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-axis-title{
  font-size:17px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-path{
  stroke-width:4.5;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-legend{
  min-height:42px;
  align-items:center;
  padding:2px 20px 15px;
  font-size:.8rem;
}
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-value{
  margin:0 18px 18px;
  padding:11px 12px;
  font-size:.9rem;
}
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-value strong{
  font-size:1.12rem;
}

.q-sine-control-deck{max-width:1240px;margin:0 auto}
.q-sine-mode-row{display:grid;grid-template-columns:minmax(200px,.7fr) minmax(560px,1.8fr);align-items:center;gap:24px;margin-bottom:12px}
.q-sine-mode-label span{display:block;color:#233d5b;font-size:.86rem;font-weight:800;margin-bottom:3px}
.q-sine-mode-label small{display:block;color:#7a8ca2;font-size:.74rem;line-height:1.4}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-switch{margin:0;padding:5px;gap:6px}
.q-lab[data-quantum-lab="sinusoid"] .q-mode-btn{padding:10px 12px;font-size:.78rem;white-space:nowrap}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-prompt{margin:0 0 18px;padding:10px 13px;font-size:.79rem}
.q-sine-sliders{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:2px}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control{margin:0;padding:14px 16px;border:1px solid #e1e8f2;border-radius:14px;background:#f9fbfe}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control label{font-size:.82rem;margin-bottom:11px}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders input[type=range]{height:22px}
.q-sine-control-bottom{display:grid;grid-template-columns:minmax(300px,.72fr) minmax(0,1.55fr);gap:18px;align-items:stretch;margin-top:18px}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:0;align-self:stretch}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn{min-height:58px;font-size:.84rem;border-radius:12px}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-readout{display:grid;grid-template-columns:minmax(250px,1.25fr) minmax(0,1.75fr);align-items:center;gap:18px;padding:12px 14px}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-readout>div>strong{font-size:1rem;white-space:nowrap;overflow-wrap:normal}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:0}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span{padding:9px 10px;min-width:0}

@media(max-width:1100px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-stage-grid{grid-template-columns:minmax(0,1.25fr) minmax(300px,.85fr)}
  .q-sine-mode-row{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-switch{max-width:720px;width:100%}
  .q-sine-control-bottom{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-readout{grid-template-columns:1fr 1.5fr}
}
@media(max-width:860px){
  .q-lab[data-quantum-lab="sinusoid"] .q-stage{padding:20px}
  .q-lab[data-quantum-lab="sinusoid"] .q-controls{padding:20px}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-stage-grid{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-phasor-panel{max-width:560px;width:100%;margin:0 auto}
  .q-sine-sliders{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-readout{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{grid-template-columns:repeat(4,1fr)}
}
@media(max-width:600px){
  .q-lab[data-quantum-lab="sinusoid"] .q-stage{padding:14px}
  .q-lab[data-quantum-lab="sinusoid"] .q-controls{padding:16px}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-panel-head{min-height:0;padding:13px 15px}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-panel-head strong{font-size:.9rem;white-space:normal}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-wave-panel .q-sine-svg{min-height:0}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-switch{grid-template-columns:repeat(2,1fr)}
  .q-sine-mode-label small{display:none}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-transport{grid-template-columns:1fr 1fr 1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn{min-height:48px;padding:8px 5px;font-size:.75rem}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{grid-template-columns:repeat(2,1fr)}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-readout>div>strong{white-space:normal}
}

/* --------------------------------------------------------------------------
   Sinusoidal laboratory v5 — final control-deck polish
   -------------------------------------------------------------------------- */
.q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-row{
  grid-template-columns:minmax(165px,.55fr) minmax(0,2fr);
  gap:20px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-switch{
  width:100%;
  min-width:0;
  grid-template-columns:repeat(4,minmax(0,1fr));
}
.q-lab[data-quantum-lab="sinusoid"] .q-mode-btn{
  width:100%;
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control label{
  gap:14px;
  align-items:flex-start;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control label span:first-child{
  min-width:0;
  line-height:1.25;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control label span:last-child{
  flex:0 0 auto;
  white-space:nowrap;
  text-align:right;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-control-bottom{
  grid-template-columns:minmax(250px,.52fr) minmax(0,1.9fr);
  align-items:start;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport{
  gap:8px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn{
  min-height:50px;
  padding:9px 8px;
  font-size:.8rem;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-readout{
  display:block;
  padding:0;
  overflow:hidden;
  background:#f8fbff;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-equation{
  padding:14px 17px 13px;
  border-bottom:1px solid #e0e8f2;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-equation small{
  margin-bottom:5px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-equation strong{
  display:block;
  font-family:Georgia,serif;
  color:#243e5d;
  font-size:1.08rem;
  line-height:1.35;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
  margin:0;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span{
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:72px;
  padding:11px 14px;
  border:0;
  border-right:1px solid #e0e8f2;
  border-radius:0;
  background:#fff;
  min-width:0;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span:last-child{
  border-right:0;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics b{
  display:block;
  margin:0 0 5px;
  color:#64778e;
  font-size:.62rem;
  line-height:1.2;
  text-transform:uppercase;
  letter-spacing:.065em;
  white-space:nowrap;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics em{
  display:block;
  color:#233d5b;
  font-style:normal;
  font-weight:800;
  font-size:.86rem;
  line-height:1.2;
  white-space:nowrap;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-wave-panel .q-sine-svg{
  min-height:350px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-legend{
  padding-bottom:12px;
}

@media(max-width:1100px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-row{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-control-bottom{grid-template-columns:1fr}
}
@media(max-width:760px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-mode-switch{grid-template-columns:repeat(2,minmax(0,1fr))}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-equation strong{white-space:normal;overflow:visible;text-overflow:clip}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span:nth-child(2){border-right:0}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span:nth-child(-n+2){border-bottom:1px solid #e0e8f2}
}
@media(max-width:480px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-transport{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{grid-template-columns:1fr}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span{border-right:0;border-bottom:1px solid #e0e8f2}
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span:last-child{border-bottom:0}
}


/* ===== Quantum lesson polish v6 ===== */
/* Right-side learning navigation */
.q-side-v2{gap:18px}
.q-side-v2 .q-side-card{
  border:1px solid #dce5f0;
  border-radius:18px;
  background:rgba(255,255,255,.96);
  padding:18px 18px 16px;
  box-shadow:0 12px 32px rgba(31,61,101,.075);
}
.q-side-v2 .q-side-card h4{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0 0 14px;
  color:#142a45;
  font-size:.96rem;
  letter-spacing:-.01em;
}
.q-side-v2 .q-side-card h4 i{color:#376bd6}
.q-toc-card nav{
  display:flex;
  flex-direction:column;
  gap:5px;
  padding:2px 0 2px 8px;
  background:transparent !important;
  border:0 !important;
  box-shadow:none !important;
}
.q-toc-card nav a{
  position:relative;
  display:block;
  padding:9px 10px 9px 14px;
  border:0;
  border-left:2px solid #dfe7f1;
  border-radius:0 10px 10px 0;
  background:transparent;
  color:#60758c;
  font-size:.84rem;
  font-weight:600;
  line-height:1.4;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.q-toc-card nav a:hover{
  color:#245dcc;
  background:#f3f7ff;
  border-left-color:#9ab6f2;
  transform:translateX(2px);
}
.q-toc-card nav a.active{
  color:#174fae;
  background:linear-gradient(90deg,#eef4ff,#f8fbff);
  border-left-color:#2f69df;
  font-weight:800;
}
.q-toc-card nav a.active::after{
  content:"";
  position:absolute;
  right:10px;
  top:50%;
  width:6px;
  height:6px;
  border-radius:50%;
  background:#2f69df;
  transform:translateY(-50%);
}
.q-side-v2 .q-side-card:not(.q-toc-card) a{
  display:flex;
  align-items:flex-start;
  gap:8px;
  padding:10px 4px;
  color:#526a83;
  border-bottom:1px solid #edf1f6;
  font-size:.86rem;
  line-height:1.4;
  transition:color .18s ease,transform .18s ease;
}
.q-side-v2 .q-side-card:not(.q-toc-card) a:hover{color:#245dcc;transform:translateX(2px)}
.q-notation-card{
  background:linear-gradient(180deg,#ffffff,#f8fbff) !important;
}
.q-notation-card p{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:8px;
  align-items:baseline;
  margin:8px 0;
  color:#6a7c90;
  font-size:.8rem;
}
.q-notation-card strong{color:#183554}

/* Sinusoidal lab finishing touches */
.q-sine-mode-btn{transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease}
.q-sine-mode-btn:hover{background:#f7f9ff;color:#2c5fc4;transform:translateY(-1px)}
.q-sine-mode-btn.active{box-shadow:0 7px 18px rgba(55,88,170,.12)}
.q-sine-action{min-height:58px !important;padding:12px 20px !important}
.q-sine-svg text.q-sine-axis-title{font-size:14px !important;font-weight:800}
.q-sine-svg text.q-sine-tick,.q-sine-svg .q-sine-tick{font-size:12px !important}
.q-phasor-value{display:grid;grid-template-columns:1fr auto;gap:8px 14px;align-items:center}
.q-phasor-value .q-theta-live{grid-column:1/-1;font-size:.82rem;color:#60758d;font-weight:600}
.q-phasor-value .q-theta-live strong{color:#234669;font-family:Georgia,'Times New Roman',serif}

@media(max-width:1180px){
  .q-side-v2 .q-side-card{padding:16px}
  .q-toc-card nav a{font-size:.81rem;padding-right:18px}
}

/* ===== Sinusoidal laboratory polish v7: compact control/readout deck ===== */
@media (min-width: 1101px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control label{
    align-items:center;
  }
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control label span:first-child{
    white-space:nowrap;
    font-size:.79rem;
  }
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-sliders .q-control:nth-child(2) label span:first-child{
    font-size:.76rem;
  }
}

.q-lab[data-quantum-lab="sinusoid"] .q-sine-control-bottom{
  grid-template-columns:minmax(225px,.42fr) minmax(0,2.15fr);
  gap:16px;
  align-items:start;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport{
  align-self:start;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn{
  min-height:44px;
  height:44px;
  padding:6px 8px;
  border-radius:11px;
  font-size:.77rem;
  line-height:1;
}

.q-lab[data-quantum-lab="sinusoid"] .q-sine-equation{
  padding:12px 16px 11px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-equation small{
  font-size:.61rem;
  letter-spacing:.075em;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-equation strong{
  font-size:1.02rem;
}

.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{
  grid-template-columns:repeat(4,minmax(118px,1fr));
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics span{
  min-height:66px;
  padding:10px 12px;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics b{
  font-size:.56rem;
  line-height:1.15;
  letter-spacing:.055em;
  white-space:normal;
  text-wrap:balance;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics em{
  font-size:.84rem;
}

/* Give the instantaneous-value cell a little more breathing room on wide screens. */
@media (min-width: 1220px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{
    grid-template-columns:.95fr .95fr 1fr 1.25fr;
  }
}

@media(max-width:1100px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-control-bottom{
    grid-template-columns:1fr;
  }
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-transport{
    max-width:420px;
  }
}

@media(max-width:760px){
  .q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}


/* ===== Sinusoidal laboratory polish v8: final micro-polish ===== */
/* Keep keyboard focus visible, but replace the browser's heavy black outline. */
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn:focus,
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn:focus-visible{
  outline:none;
  box-shadow:0 0 0 3px rgba(47,105,223,.20),0 4px 12px rgba(27,71,135,.10);
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-transport .q-small-btn:not(:focus-visible){outline:none}

/* Make the phasor status feel like part of the visual rather than a separate large card. */
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-value{
  margin:8px 14px 14px;
  padding:9px 14px;
  border-radius:11px;
  gap:3px 12px;
  min-height:0;
}
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-value>span:first-child{
  font-size:.76rem;
}
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-value>strong{
  font-size:.96rem;
}
.q-lab[data-quantum-lab="sinusoid"] .q-phasor-value .q-theta-live{
  font-size:.75rem;
  line-height:1.25;
  margin-top:1px;
}

/* Softer metric typography: sentence case appearance with less visual shouting. */
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics b{
  text-transform:none;
  letter-spacing:.02em;
  font-size:.62rem;
  font-weight:750;
  color:#64758a;
}
.q-lab[data-quantum-lab="sinusoid"] .q-sine-metrics em{
  margin-top:3px;
}

/* v35: Quantum Computing Resources integrated into main quantum.css */
.q-resource-hero{position:relative;overflow:hidden;padding:82px 0 68px;background:radial-gradient(circle at 80% 20%,rgba(97,109,242,.28),transparent 30%),radial-gradient(circle at 15% 86%,rgba(35,199,182,.18),transparent 28%),linear-gradient(135deg,#07192b,#102f4a 62%,#173c56);color:#fff}
.q-resource-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.55fr);gap:64px;align-items:center}
.q-resource-hero h1{font-size:clamp(3rem,6vw,5.3rem);line-height:.95;letter-spacing:-.045em;margin:16px 0 22px}
.q-resource-hero p{max-width:720px;color:#d8e8f3;font-size:1.08rem;line-height:1.72}
.q-resource-hero-card{padding:28px;border:1px solid rgba(179,222,236,.16);border-radius:22px;background:rgba(7,29,48,.62);backdrop-filter:blur(10px);box-shadow:0 20px 44px rgba(0,0,0,.16)}
.q-resource-hero-card>span{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,#1fc5b3,#6f78ee);font-size:1.2rem;margin-bottom:22px}
.q-resource-hero-card strong{display:block;font-size:2.6rem;line-height:1;color:#fff}.q-resource-hero-card b{display:block;margin:7px 0 12px;color:#a7f1e8;font-size:.86rem;text-transform:uppercase;letter-spacing:.08em}.q-resource-hero-card p{font-size:.91rem;line-height:1.55;margin:0;color:#c5d9e7}
.q-resource-principles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.q-resource-principles>div{display:grid;grid-template-columns:auto 1fr;gap:3px 12px;align-items:center;padding:18px 20px;border:1px solid #dfe8f0;border-radius:16px;background:#fff;box-shadow:0 8px 24px rgba(26,61,82,.045)}
.q-resource-principles i{grid-row:1/3;width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#eef9f7;color:#12988b}.q-resource-principles strong{color:#173650}.q-resource-principles span{color:#6a8296;font-size:.84rem;line-height:1.45}
.q-resource-library{background:linear-gradient(180deg,#f8fbfd,#f5f9fb)}
.q-resource-jump{display:flex;align-items:center;gap:9px;flex-wrap:wrap;padding:13px 15px;border:1px solid #dfe8ef;border-radius:14px;background:#fff;margin-bottom:38px}.q-resource-jump>span{font-size:.74rem;font-weight:850;text-transform:uppercase;letter-spacing:.07em;color:#71889b;margin-right:4px}.q-resource-jump a{padding:8px 11px;border-radius:9px;background:#f3f8fa;color:#166b67;text-decoration:none;font-size:.82rem;font-weight:780}.q-resource-jump a:hover{background:#eaf7f4}
.q-resource-group{scroll-margin-top:90px;margin-bottom:58px}.q-resource-group-head{display:flex;justify-content:space-between;align-items:flex-end;gap:28px;margin-bottom:22px}.q-resource-group-head>div{max-width:760px}.q-resource-group-head h2{font-size:clamp(1.75rem,3vw,2.45rem);margin:6px 0 9px;color:#173650;letter-spacing:-.025em}.q-resource-group-head p{margin:0;color:#667f93;line-height:1.6}.q-resource-count{white-space:nowrap;padding:8px 11px;border-radius:999px;background:#eaf7f4;color:#0d7e73;font-size:.75rem;font-weight:800}
.q-resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.q-resource-card{display:flex;flex-direction:column;min-height:300px;padding:22px;border:1px solid #dce7ef;border-radius:18px;background:#fff;text-decoration:none;box-shadow:0 10px 28px rgba(24,61,83,.055);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.q-resource-card:hover{transform:translateY(-4px);box-shadow:0 16px 38px rgba(24,61,83,.10);border-color:#bcded9}
.q-resource-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.q-resource-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,#e7faf7,#efefff);color:#168f85;font-size:1.08rem}.q-resource-external{color:#8ca0b1;font-size:.8rem}
.q-resource-card h3{margin:0 0 10px;color:#173650;font-size:1.15rem}.q-resource-card p{margin:0;color:#657e91;line-height:1.58;font-size:.91rem}
.q-resource-badges{display:flex;gap:6px;flex-wrap:wrap;margin-top:18px}.q-resource-badges span{padding:5px 8px;border-radius:999px;background:#f2f6fb;color:#647a90;font-size:.65rem;font-weight:800;letter-spacing:.025em}
.q-resource-open{margin-top:auto;padding-top:20px;color:#0f766e;font-size:.84rem;font-weight:800}.q-resource-open i{margin-left:5px;transition:transform .18s ease}.q-resource-card:hover .q-resource-open i{transform:translateX(3px)}
.q-resource-note{display:flex;align-items:flex-start;gap:13px;margin-top:12px;padding:17px 18px;border:1px dashed #cfdee7;border-radius:14px;background:#fbfdfe;color:#667f92}.q-resource-note i{color:#15998d;margin-top:3px}.q-resource-note strong{display:block;color:#173650;margin-bottom:3px}.q-resource-note p{margin:0;font-size:.86rem;line-height:1.55}
.q-home-resource-cta{padding-top:10px}.q-resource-cta-card{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:center;padding:26px 28px;border:1px solid #dce8ef;border-radius:20px;background:linear-gradient(135deg,#f8fcfc,#f5f5ff);box-shadow:0 12px 32px rgba(24,61,83,.055)}.q-resource-cta-icon{width:58px;height:58px;display:grid;place-items:center;border-radius:17px;background:linear-gradient(135deg,#1db7aa,#6e76ed);color:#fff;font-size:1.25rem}.q-resource-cta-card h2{margin:4px 0 5px;color:#173650}.q-resource-cta-card p{margin:0;color:#667f92;line-height:1.5;max-width:720px}
@media(max-width:1000px){.q-resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.q-resource-hero-inner{grid-template-columns:1fr .55fr;gap:36px}}
@media(max-width:820px){.q-resource-hero-inner{grid-template-columns:1fr}.q-resource-hero-card{max-width:520px}.q-resource-principles{grid-template-columns:1fr}.q-resource-cta-card{grid-template-columns:auto 1fr}.q-resource-cta-card .q-btn{grid-column:1/-1;width:max-content}}
@media(max-width:680px){.q-resource-grid{grid-template-columns:1fr}.q-resource-group-head{align-items:flex-start;flex-direction:column;gap:12px}.q-resource-card{min-height:0}.q-resource-cta-card{grid-template-columns:1fr}.q-resource-cta-icon{width:50px;height:50px}.q-resource-cta-card .q-btn{width:100%}.q-resource-hero{padding:64px 0 52px}.q-resource-btn{width:100%}}


/* v39: keep the four Quantum hero actions aligned on desktop */
.q-home .q-actions-four{
  display:grid;
  grid-template-columns:repeat(4,max-content);
  gap:10px;
  align-items:center;
}

.q-home .q-actions-four .q-btn{
  padding:10px 13px;
  gap:7px;
  font-size:.86rem;
  white-space:nowrap;
}

@media(max-width:1120px){
  .q-home .q-actions-four{
    grid-template-columns:repeat(2,max-content);
  }
}

@media(max-width:680px){
  .q-home .q-actions-four{
    grid-template-columns:1fr;
  }
  .q-home .q-actions-four .q-btn{
    width:100%;
    justify-content:center;
  }
}