/* ================= Lambda Lab home page ================= */
html:not(.is-home) #home{display:none}
.is-home main>:not(#home){display:none!important}
.is-home main{max-width:1500px}
.home{--ink:#18243c;--mut:#6d7c93;color:var(--ink);padding-bottom:8px}

/* ---------- hero ---------- */
.h-hero{position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:30px;
 padding:56px 56px 60px;border-radius:24px;background:#f9fbff;border:1px solid #e3e9f5;isolation:isolate}
.h-blobs{position:absolute;inset:0;z-index:-1;filter:blur(60px);opacity:.75}
.h-blobs span{position:absolute;border-radius:50%;animation:h-drift 16s ease-in-out infinite alternate}
.h-blobs span:nth-child(1){width:46%;aspect-ratio:1;left:-8%;top:-30%;background:#c9d6ff}
.h-blobs span:nth-child(2){width:38%;aspect-ratio:1;right:4%;top:-20%;background:#ffd9b8;animation-duration:19s;animation-delay:-5s}
.h-blobs span:nth-child(3){width:40%;aspect-ratio:1;left:34%;bottom:-55%;background:#c8efe3;animation-duration:22s;animation-delay:-9s}
@keyframes h-drift{0%{transform:translate(0,0) scale(1)}50%{transform:translate(6%,8%) scale(1.12)}100%{transform:translate(-5%,4%) scale(.94)}}
.h-eyebrow{font-size:12px;letter-spacing:1.6px;text-transform:uppercase;font-weight:650;color:#3156d9}
.h-hero h1{margin:12px 0 14px;font-size:clamp(34px,4.4vw,58px);line-height:1.05;letter-spacing:-1.2px;font-weight:700}
.h-hero h1 span{background:linear-gradient(90deg,#3156d9,#8a4fd8 55%,#e0752f);-webkit-background-clip:text;background-clip:text;color:transparent}
.h-hero p{max-width:600px;margin:0;font-size:17px;line-height:1.65;color:#55647b}
.h-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.h-btn{display:inline-flex;align-items:center;gap:6px;padding:12px 20px;border-radius:12px;font-weight:600;font-size:14px;text-decoration:none;
 color:#23345a;background:#fff;border:1px solid #d9e1ef;transition:transform .2s,box-shadow .2s,background .2s}
.h-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px #1f3a7a1f}
.h-btn.primary{background:#3156d9;border-color:#3156d9;color:#fff}
.h-btn.primary:hover{background:#2849c2}
.h-hero-logo{width:clamp(120px,15vw,200px);animation:h-float 6s ease-in-out infinite;filter:drop-shadow(0 22px 30px #2c3f7a33)}
.h-hero-logo img{display:block;width:100%;height:auto}
@keyframes h-float{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-14px) rotate(2deg)}}

/* ---------- numbers ---------- */
.h-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:40px 0 0}
.h-stats>div{background:#fff;border:1px solid #e5eaf2;border-radius:16px;padding:20px 24px;display:flex;align-items:baseline;gap:12px}
.h-stats strong{font-size:36px;font-weight:700;letter-spacing:-1px;color:#1d2f59;font-variant-numeric:tabular-nums}
.h-stats span{color:var(--mut);font-size:14px;font-weight:550}

/* ---------- ribbon ---------- */
.h-ribbon{margin:18px 0 0;overflow:hidden;border-block:1px solid #e5eaf2;padding:12px 0;
 mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent)}
.h-rib-track{display:flex;width:max-content;gap:10px;animation:h-marquee 70s linear infinite}
.h-ribbon:hover .h-rib-track{animation-play-state:paused}
[dir=rtl] .h-ribbon{direction:ltr}[dir=rtl] .h-rib-track{animation-direction:reverse}
@keyframes h-marquee{to{transform:translateX(-50%)}}
.h-rib-item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;padding:7px 14px;border-radius:999px;border:1px solid #e3e8f1;background:#fff;
 font-size:13px;font-weight:550;color:#34445f;cursor:pointer;transition:border-color .2s,color .2s}
.h-rib-item i{width:7px;height:7px;border-radius:50%;background:var(--c)}
.h-rib-item:hover{border-color:var(--c);color:var(--c)}

/* ---------- subject tabs ---------- */
.h-explore{margin-top:34px;scroll-margin-top:20px}
.h-tabs{position:relative;display:flex;flex-wrap:wrap;gap:4px;padding:5px;background:#fff;border:1px solid #e5eaf2;border-radius:14px;width:max-content;max-width:100%}
.h-tab-pill{position:absolute;left:0;top:5px;height:calc(100% - 10px);border-radius:10px;background:color-mix(in srgb,var(--c,#3156d9) 13%,#fff);
 box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--c,#3156d9) 30%,transparent);transition:transform .35s cubic-bezier(.3,.8,.3,1),width .35s cubic-bezier(.3,.8,.3,1),background .3s;pointer-events:none}
.h-tab{position:relative;display:inline-flex;align-items:center;gap:7px;padding:9px 14px;border:0;background:none;border-radius:10px;font:inherit;font-size:14px;font-weight:600;color:#56657d;cursor:pointer;transition:color .2s}
.h-tab i{width:8px;height:8px;border-radius:50%;background:var(--c)}
.h-tab b{font-size:11.5px;font-weight:650;color:#8a97ab;background:#f1f4f9;border-radius:999px;padding:1px 7px}
.h-tab.is-on{color:var(--c)}
.h-tab.is-on b{background:#fff;color:var(--c)}
@media(max-width:1000px){.h-tabs{flex-wrap:wrap;width:auto}.h-tab-pill{display:none}.h-tab.is-on{background:color-mix(in srgb,var(--c) 13%,#fff)}}

/* ---------- mixed-size grid ---------- */
.h-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-flow:dense;gap:16px;margin-top:20px;transition:opacity .18s}
.h-grid.is-fading{opacity:0}
.h-card{--mx:50%;--my:50%;position:relative;display:flex;flex-direction:column;min-height:250px;border-radius:18px;background:#fff;border:1px solid #e5eaf2;
 text-decoration:none;color:inherit;overflow:hidden;isolation:isolate;transform:perspective(900px) var(--tilt,rotateX(0) rotateY(0)) translateY(0);
 transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s,border-color .35s,opacity .6s,translate .6s cubic-bezier(.2,.8,.2,1);
 opacity:0;translate:0 26px}
.h-card.is-in{opacity:1;translate:0 0}
.h-card::before{content:"";position:absolute;inset:0;z-index:-1;opacity:0;transition:opacity .3s;
 background:radial-gradient(420px circle at var(--mx) var(--my),color-mix(in srgb,var(--c) 16%,transparent),transparent 60%)}
.h-card::after{content:"";position:absolute;inset:0;border-radius:inherit;padding:1.5px;opacity:0;transition:opacity .3s;pointer-events:none;
 background:radial-gradient(260px circle at var(--mx) var(--my),var(--c),transparent 70%);
 -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.h-card:hover,.h-card:focus-visible{transform:perspective(900px) var(--tilt,rotateX(0) rotateY(0)) translateY(-6px);box-shadow:0 22px 44px -18px color-mix(in srgb,var(--c) 45%,#1a2a4a);border-color:transparent;outline:none}
.h-card:hover::before,.h-card:hover::after,.h-card:focus-visible::after{opacity:1}
.h-card.is-wide{grid-column:span 2}
.h-card.is-featured{grid-column:span 2;grid-row:span 2}
.h-card-art{position:relative;display:grid;place-items:center;height:118px;flex:none;
 background:radial-gradient(circle at 30% 20%,color-mix(in srgb,var(--c) 22%,#fff),color-mix(in srgb,var(--c) 7%,#fff) 70%);overflow:hidden}
.h-card-art::before{content:"";position:absolute;inset:0;opacity:.5;background-image:radial-gradient(color-mix(in srgb,var(--c) 35%,transparent) 1px,transparent 1.2px);background-size:16px 16px}
.h-card-symbol{position:relative;font-size:46px;line-height:1;color:var(--c);transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.h-card:hover .h-card-symbol{transform:scale(1.18) rotate(-6deg)}
.h-card.is-featured .h-card-art{height:auto;flex:1;min-height:230px}
.h-card.is-featured .h-card-symbol{font-size:120px}
.h-card-body{display:flex;flex-direction:column;gap:6px;padding:16px 18px 50px;flex:1}
.h-card.is-featured .h-card-body{flex:none;padding:22px 24px 56px}
.h-card-subject{display:inline-flex;align-items:center;gap:7px;font-size:11px;letter-spacing:1.1px;text-transform:uppercase;font-weight:650;color:var(--c)}
.h-card-subject i{width:7px;height:7px;border-radius:50%;background:var(--c)}
.h-card strong{font-size:17px;line-height:1.3;font-weight:650;color:#1a2742}
.h-card.is-featured strong{font-size:27px;letter-spacing:-.4px}
.h-card em{font-style:normal;font-size:13.5px;line-height:1.55;color:#66758c}
.h-card.is-featured em{font-size:15px}
.h-card-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:8px}
.h-card-meta span{font-size:11.5px;font-weight:550;color:#6f7e95;background:#f3f6fa;border-radius:999px;padding:3px 9px}
.h-card-go{position:absolute;left:18px;bottom:16px;font-size:13px;font-weight:650;color:var(--c);opacity:0;transform:translateX(-10px);transition:opacity .3s,transform .35s cubic-bezier(.2,.8,.2,1)}
.h-card-go b{display:inline-block;transition:transform .3s}
.h-card:hover .h-card-go,.h-card:focus-visible .h-card-go{opacity:1;transform:none}
.h-card:hover .h-card-go b{transform:translateX(4px)}
.h-card.is-featured .h-card-go{left:24px;bottom:20px}
[dir=rtl] .h-card-go{left:auto;right:18px}
.h-today{align-self:flex-start;font-size:11px;letter-spacing:1.2px;text-transform:uppercase;font-weight:700;color:#fff;background:linear-gradient(90deg,#3156d9,#8a4fd8);border-radius:999px;padding:4px 11px;margin-bottom:4px}
.h-new{position:absolute;z-index:2;top:14px;right:-34px;transform:rotate(45deg);width:120px;text-align:center;padding:4px 0;font-size:10.5px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:#fff;background:#e0752f;box-shadow:0 4px 10px #e0752f55}
@media(max-width:760px){.h-card.is-wide,.h-card.is-featured{grid-column:auto;grid-row:auto}.h-card.is-featured .h-card-art{min-height:150px}.h-card.is-featured .h-card-symbol{font-size:80px}}

@media(max-width:1180px){.h-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:900px){.h-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.h-grid{grid-template-columns:1fr}}

/* ---------- pages ---------- */
.h-pages{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px;margin-top:28px}
.h-page{min-width:40px;height:40px;padding:0 12px;border-radius:12px;border:1px solid #e0e6f0;background:#fff;font:inherit;font-size:14px;font-weight:600;color:#4c5b73;cursor:pointer;
 transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s}
.h-page:hover:not(:disabled){transform:translateY(-2px);border-color:#b9c7ec;color:#3156d9;box-shadow:0 8px 18px #1f3a7a17}
.h-page.is-on{background:#3156d9;border-color:#3156d9;color:#fff;box-shadow:0 8px 20px #3156d940}
.h-page:disabled{opacity:.4;cursor:default}
.h-arrow{font-size:20px;line-height:1}
[dir=rtl] .h-arrow{transform:scaleX(-1)}
.h-pages-info{width:100%;text-align:center;margin-top:6px;font-size:12.5px;color:#8491a6}

/* ---------- footer ---------- */
.h-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:48px;padding:26px 4px 6px;border-top:1px solid #e5eaf2}
.h-foot-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:#1d2a47}
.h-foot-brand span span{font-weight:450}
.h-foot nav{display:flex;flex-wrap:wrap;gap:6px}
.h-foot nav button{border:0;background:none;font:inherit;font-size:13.5px;color:#617089;padding:6px 10px;border-radius:8px;cursor:pointer}
.h-foot nav button:hover{color:var(--c);background:color-mix(in srgb,var(--c) 10%,#fff)}
.h-foot p{width:100%;margin:6px 0 0;font-size:12.5px;color:#95a1b3}

/* ---------- small screens ---------- */
@media(max-width:900px){.h-hero{grid-template-columns:1fr;padding:36px 26px}.h-hero-logo{display:none}.h-stats{grid-template-columns:1fr 1fr 1fr;gap:8px}.h-stats>div{flex-direction:column;gap:2px;padding:14px}.h-stats strong{font-size:26px}}
@media(prefers-reduced-motion:reduce){.h-blobs span,.h-hero-logo,.h-rib-track{animation:none}.h-card{opacity:1;translate:none}}