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p:nth-child(4){border-left:0;padding-left:0}.footer-main{align-items:flex-start;flex-direction:column}.footer-bottom{grid-template-columns:1fr}.footer-bottom span:nth-child(2){text-align:left}}@media(max-width:767px){.site-header{width:calc(100% - 2rem);height:4rem}.brand{font-size:1.05rem}.brand-symbol{width:1.8rem;height:1.8rem}.mobile-nav{top:4rem}.hero{min-height:auto;padding:6.5rem 1rem 4rem}.hero h1{font-size:clamp(3.3rem,15vw,5rem)}.hero-subtitle{font-size:.88rem}.hero-actions{align-items:flex-start;flex-direction:column;gap:1.2rem}.primary-download{width:100%;min-height:3.5rem}.hero-product{min-height:20rem;margin:1rem -1rem 0}.product-shell{width:96%;transform:rotate(1deg) scale(.92)}.product-body{grid-template-columns:7.4rem 1fr;min-height:20rem}.product-sidebar{font-size:.55rem;padding:.7rem .45rem}.product-sidebar p{margin-top:.8rem}.profile{margin-top:5rem}.conversation{padding:.8rem}.question{margin-top:1.3rem;max-width:88%}.answer p{font-size:.61rem}.brief-grid{grid-template-columns:1fr}.brief-grid article:nth-child(2){display:none}.composer{font-size:.52rem}.hero-scroll{display:none}.trust-strip{justify-content:flex-start;padding:1.2rem 1rem;gap:1.5rem}.abilities{padding:5rem 1rem}.section-intro{margin-bottom:2.5rem}.section-intro h2,.mobile-copy h2,.download-section h2,.faq-title h2{font-size:clamp(2.8rem,13vw,4.2rem)}.feature-panel{padding:2rem 1.2rem;border-radius:1rem}.feature-copy h3{margin-top:1.5rem;font-size:2.5rem}.feature-visual{margin-top:.5rem}.search-window,.reason-board,.vision-window,.code-window{min-height:20rem}.query-line{margin-top:1.7rem;font-size:.65rem}.reason-question{margin-top:1.5rem;font-size:.95rem}.vision-image{height:10rem}.code-body{font-size:.57rem}.mobile-section{padding:5rem 1rem 4rem}.phone{width:13.5rem;height:27rem}.phone-front{right:2%;top:2rem}.phone-back{right:23%;top:0}.phone-answer{margin-top:3.2rem}.mobile-orbit{margin-top:3.5rem}.download-section{padding:4.5rem 1rem;align-items:flex-start;flex-direction:column}.download-section .primary-download{width:100%}.faq{padding:5rem 1rem}.keyword-guide{grid-template-columns:1fr 1fr;padding:1.5rem 1rem;gap:1.2rem}.keyword-guide p{padding:0;border-left:0}.keyword-guide p:nth-child(4){padding-left:0}.footer-main{padding-bottom:2rem}.footer-bottom{gap:.5rem}}
@media(max-width:1023px){.hero{min-height:auto;align-content:start}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}

/* Floating platform CTA inspired by a device dock */
.primary-download,.header-download{position:relative;isolation:isolate;border:0;border-radius:0;background:linear-gradient(180deg,#24314b 0%,#111827 68%);color:#f8fbff;box-shadow:none;filter:drop-shadow(0 .55rem .7rem rgba(16,21,39,.35));overflow:visible}
.primary-download:before,.header-download:before{content:"";position:absolute;z-index:-1;left:8%;right:8%;bottom:-.5rem;height:.7rem;background:linear-gradient(90deg,#4830b6,#856cff 48%,#3b2aac);clip-path:polygon(7% 0,93% 0,100% 100%,0 100%);box-shadow:0 .2rem .8rem rgba(99,80,255,.7)}
.primary-download:after,.header-download:after{content:"";position:absolute;z-index:-2;inset:-.7rem .8rem auto;height:.45rem;background:radial-gradient(circle,#8ec8ff 0 1px,transparent 1.5px) 0 0/2.8rem .45rem,radial-gradient(circle,#7865ff 0 1px,transparent 1.5px) 1.2rem .2rem/3.4rem .5rem;opacity:.8;pointer-events:none}
.primary-download .download-glyph{background:linear-gradient(145deg,#2f7bff,#6f5cff);border-color:#a7c9ff;box-shadow:0 0 .8rem rgba(91,132,255,.65)}
.primary-download b{letter-spacing:.01em}.primary-download small{color:#a9c6fa}.primary-download:hover,.header-download:hover{transform:translateY(-.16rem);filter:drop-shadow(0 .7rem .9rem rgba(63,82,170,.5))}.primary-download:hover:before,.header-download:hover:before{background:linear-gradient(90deg,#5e3ee2,#a18fff 48%,#5138d0)}
.header-download{padding:.58rem 1rem}.header-download .download-glyph{width:1.25rem;height:1.25rem;color:#9bc4ff;border-color:#628dff;background:#182744}
.download-section .primary-download{background:linear-gradient(180deg,#24314b 0%,#111827 68%);box-shadow:none}
.hero-word{position:absolute;z-index:1;left:44%;top:50%;transform:translate(-50%,-50%) rotate(-8deg);font:900 clamp(10rem,28vw,29rem)/.78 var(--sans);letter-spacing:-.12em;color:rgba(104,126,177,.055);text-shadow:0 0 1px rgba(163,186,255,.15),0 2rem 5rem rgba(0,0,0,.7);white-space:nowrap;pointer-events:none;user-select:none}
.hero-word:after{content:"GROK";position:absolute;inset:0;color:transparent;-webkit-text-stroke:1px rgba(119,147,222,.09);transform:translate(.3rem,.45rem);filter:blur(1px);pointer-events:none}
@media(max-width:767px){.primary-download{min-height:3.7rem;padding:.65rem .85rem}.primary-download:before{bottom:-.45rem}.primary-download:after{inset:-.55rem .7rem auto}.header-download{padding:.55rem .8rem}}

/* Case-study art direction: a dark product visual longform */
.abilities{position:relative;background:#080b12;color:#f4f7ff;overflow:hidden}
.abilities:before{content:"THINK  /  SEARCH  /  BUILD";position:absolute;right:-4rem;top:11rem;color:rgba(130,145,190,.055);font:700 clamp(3rem,10vw,10rem)/.8 var(--mono);letter-spacing:-.08em;white-space:nowrap;transform:rotate(90deg);transform-origin:right top;pointer-events:none}
.abilities:after{content:"";position:absolute;top:0;bottom:0;left:clamp(1.25rem,calc((100% - 1200px)/2),8rem);width:1px;background:linear-gradient(180deg,transparent,#242d44 15%,#242d44 85%,transparent);opacity:.7;pointer-events:none}
.section-intro{position:relative;z-index:1}.section-intro .section-label{color:#7897d2}.section-intro h2{color:#f4f7ff}.section-intro>p:last-child{color:#8f9bb0}
.feature-panel{position:relative;z-index:1;background:#0e131d;border:1px solid #26324a;border-radius:.45rem;box-shadow:0 1.8rem 4rem rgba(0,0,0,.24);padding:4rem clamp(1.5rem,5vw,5rem)}
.feature-panel:before{content:"";position:absolute;left:0;top:1.7rem;width:2.6rem;height:1px;background:#6e8fff;box-shadow:0 0 1rem #6e8fff}
.feature-panel:nth-of-type(2){background:linear-gradient(120deg,#0e141f,#12152b)}
.feature-panel:nth-of-type(3){background:linear-gradient(120deg,#101522,#161129)}
.feature-panel:nth-of-type(4){background:linear-gradient(120deg,#0d171a,#101b25)}
.feature-panel:nth-of-type(5){background:linear-gradient(120deg,#111722,#17142b)}
.feature-number{color:#7ca5ff}.feature-copy h3{color:#f7f9ff}.feature-copy>p{color:#9ca8bb}.feature-copy ul{color:#7f8da4}.feature-copy li{border-color:#273247}.feature-copy li:before{color:#7b9dff}
.feature-visual{position:relative}.feature-visual:before{content:"";position:absolute;inset:-1.1rem -1.1rem auto auto;width:4rem;height:4rem;border-top:1px solid #5266a2;border-right:1px solid #5266a2;opacity:.7;pointer-events:none}
.search-window,.reason-board,.vision-window,.code-window{box-shadow:0 1.2rem 2.5rem rgba(0,0,0,.28),0 0 0 1px rgba(123,151,255,.08)}
.search-window{background:#f7f9fd}.reason-board{background:#131127}.vision-window{background:#f3fbf8}.code-window{background:#0a111e}
.mobile-section{position:relative}.mobile-section:before{content:"MOBILE / EVERYWHERE";position:absolute;right:-1rem;top:5rem;color:rgba(144,170,232,.055);font:700 clamp(2rem,6vw,6rem)/1 var(--mono);letter-spacing:-.08em;transform:rotate(90deg);transform-origin:right top;pointer-events:none}
.download-section{position:relative;background:#d9e3fb}.download-section:before{content:"GROK 3.0";position:absolute;right:6%;bottom:1rem;color:rgba(53,83,150,.1);font:700 clamp(2rem,8vw,8rem)/1 var(--mono);letter-spacing:-.08em;pointer-events:none}
.visual-archive{position:relative;padding:8rem max(1.25rem,calc((100% - 1200px)/2));background:#080b12;color:#f4f7ff;overflow:hidden}.visual-archive:before{content:"ARCHIVE";position:absolute;right:-3rem;top:13rem;color:rgba(126,148,205,.045);font:900 clamp(4rem,13vw,13rem)/.8 var(--mono);letter-spacing:-.1em;transform:rotate(90deg);transform-origin:right top;pointer-events:none}.archive-heading{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:end;max-width:1200px;margin:0 auto 3.5rem}.archive-heading .section-label{grid-column:1/-1;color:#7999d4;margin-bottom:-1.4rem}.archive-heading h2{margin:0;font-size:clamp(2.8rem,5.5vw,5.6rem);line-height:.95;letter-spacing:-.075em}.archive-heading h2 em{font-style:normal;color:#8faeff}.archive-heading>p:last-child{max-width:27rem;margin:0;color:#8f9bb0;font-size:.9rem;line-height:1.9}.archive-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr .65fr;gap:1.2rem;max-width:1200px;margin:auto}.archive-grid figure{position:relative;margin:0;overflow:hidden;background:#111827;border:1px solid #293650}.archive-main{min-height:36rem}.archive-main img{width:100%;height:100%;min-height:36rem;object-fit:cover;display:block;filter:saturate(.82) contrast(1.08) brightness(.78);transition:transform .6s,filter .6s}.archive-side{display:grid;grid-template-rows:1fr 1fr;gap:1.2rem}.archive-side figure{min-height:17.4rem}.archive-side img{width:100%;height:100%;min-height:17.4rem;object-fit:cover;display:block;filter:saturate(.7) contrast(1.12) brightness(.65);transition:transform .6s,filter .6s}.archive-grid figure:hover img{transform:scale(1.045);filter:saturate(1) contrast(1.08) brightness(.88)}.archive-grid figcaption{position:absolute;left:0;right:0;bottom:0;padding:4rem 1.4rem 1.25rem;background:linear-gradient(transparent,rgba(4,7,13,.94));display:flex;flex-direction:column;gap:.4rem}.archive-grid figcaption span{color:#86adff;font: .56rem var(--mono);letter-spacing:.08rem}.archive-grid figcaption b{font-size:.88rem;line-height:1.45}.archive-main figcaption b{font-size:1.15rem;max-width:28rem}
@media(max-width:767px){.visual-archive{padding:5rem 1rem}.visual-archive:before{right:-5rem;top:11rem;font-size:4rem}.archive-heading{grid-template-columns:1fr;gap:1.2rem;margin-bottom:2.2rem}.archive-heading .section-label{margin-bottom:0}.archive-heading h2{font-size:clamp(2.8rem,13vw,4.2rem)}.archive-heading>p:last-child{font-size:.82rem}.archive-grid{grid-template-columns:1fr;gap:.8rem}.archive-main,.archive-main img{min-height:20rem}.archive-side{gap:.8rem}.archive-side figure,.archive-side img{min-height:12rem}.archive-grid figcaption{padding:3.2rem .9rem .8rem}.archive-grid figcaption b,.archive-main figcaption b{font-size:.75rem}}
@media(min-width:1024px){.feature-panel:nth-of-type(2n) .feature-copy{order:2}.feature-panel:nth-of-type(2n) .feature-visual{order:1}.feature-panel:nth-of-type(2n) .feature-copy{padding-left:2rem}.feature-panel:nth-of-type(3){margin-left:4vw;margin-right:-1vw}.feature-panel:nth-of-type(4){margin-left:-1vw;margin-right:4vw}.feature-panel:nth-of-type(5){margin-left:2vw;margin-right:2vw}}
@media(max-width:767px){.abilities:after{left:1rem}.abilities:before{right:-8rem;top:14rem;font-size:3rem}.feature-panel{box-shadow:0 1rem 2rem rgba(0,0,0,.2)}.feature-panel:before{top:1.2rem}.mobile-section:before{right:-4rem;top:9rem;font-size:2rem}}
@media(max-width:767px){.hero-word{left:48%;top:43%;font-size:clamp(8rem,38vw,13rem);opacity:.9;transform:translate(-50%,-50%) rotate(-8deg)}}