/* Photographic, information-rich Kayra Patent homepage. */
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@media(max-width:950px){.r4-hero,.r4-hero-inner{min-height:620px}.r4-hero-copy{max-width:85%;width:700px}.r4-hero h1{font-size:3.25rem}.r4-hero-side{display:none}.r4-hero-description{max-width:550px;min-height:87px}.r4-slide-dot{font-size:.7rem;padding-inline:11px;gap:8px}.r4-quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.r4-quick-card{padding:19px 22px;border-bottom:1px solid var(--r4-line)}.r4-quick-card:nth-child(2){border-right:0}.r4-quick-card strong{font-size:.96rem}.r4-quick-card small{font-size:.73rem}.r4-section-heading{gap:28px}.r4-section-heading>p{max-width:320px;font-size:.9rem}.r4-service-mosaic{grid-template-columns:1fr 1fr;grid-template-rows:250px 250px}.r4-service-major .r4-photo-copy h3{font-size:2.3rem}.r4-photo-copy h3{font-size:1.5rem}.r4-photo-copy p{font-size:.82rem}.r4-story-layout{gap:28px}.r4-story-photo{min-height:520px}.r4-story-panel h3{font-size:1.25rem}.r4-story-panel p{font-size:.89rem}.r4-story-window{min-height:260px}.r4-count-band a{flex-wrap:wrap;gap:10px;padding:22px 15px}.r4-count-band strong{font-size:2.5rem}.r4-count-band a>span:nth-child(2){font-size:.58rem;max-width:90px}.r4-count-band a>span:last-child{display:none}.r4-ribbon>.container{flex-wrap:wrap;justify-content:center;column-gap:24px;padding-block:9px}.r4-ribbon-link{min-height:44px}.r4-topic-mosaic{gap:12px}.r4-topic-1 h3{font-size:1.9rem}.r4-topic-1 p{font-size:.88rem}.r4-topic-copy>span{font-size:.53rem}.r4-topic-copy h3{font-size:1.18rem}.r4-topic-copy p{font-size:.74rem}.r4-topic-3 .r4-topic-copy>span,.r4-topic-4 .r4-topic-copy>span{font-size:.48rem}.r4-topic-3 h3,.r4-topic-4 h3{font-size:.91rem}.r4-process-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.r4-class-layout{grid-template-columns:.8fr 1.2fr;gap:25px}.r4-class-photo{height:200px}.r4-class-card{gap:10px;padding:17px 12px}.r4-class-card strong{font-size:.74rem}.r4-class-card>span:first-child{font-size:1.45rem}.r4-reading-featured .r4-reading-photo{height:220px}.r4-reading-copy{padding:20px}.r4-reading-copy h3{font-size:1.2rem}.r4-more-reading{grid-template-columns:1fr}.r4-reading-compact{grid-template-columns:145px minmax(0,1fr)}.r4-reading-compact h3{font-size:1rem}.r4-contact-layout{grid-template-columns:.75fr 1.25fr}.r4-contact-visual>div{inset-inline:25px}.r4-contact-visual h2{font-size:2.6rem}.r4-contact-phone{font-size:1.3rem}.r4-contact-form{padding:26px}.r4-faq-layout{grid-template-columns:.65fr 1.35fr;gap:32px}.r4-region-links{grid-template-columns:repeat(6,minmax(0,1fr))}}
@media(max-width:760px){.r4-section{padding-block:40px}.r4-hero,.r4-hero-inner{min-height:620px}.r4-hero-inner{padding-block:48px 102px}.r4-hero-copy{max-width:100%;width:630px}.r4-hero-shade{background:linear-gradient(90deg,rgba(12,20,26,.89),rgba(12,20,26,.53))}.r4-hero h1{font-size:3.15rem}.r4-hero-description{font-size:1.03rem;max-width:580px}.r4-hero-eyebrow{font-size:.7rem}.r4-slide-dot{font-size:0;justify-content:center;min-height:57px;gap:0}.r4-slide-dot>span{font-size:.76rem;opacity:1}.r4-section-heading{align-items:start;flex-direction:column;gap:16px}.r4-section-heading>p{max-width:none}.r4-service-mosaic{grid-template-columns:1fr 1fr;grid-template-rows:330px 260px}.r4-photo-card.r4-service-major{grid-column:1/-1;grid-row:1}.r4-photo-copy h3{font-size:1.45rem}.r4-service-major .r4-photo-copy h3{font-size:2.4rem}.r4-story-layout{grid-template-columns:1fr}.r4-story-photo{min-height:360px;max-height:420px;aspect-ratio:1.55}.r4-story-copy{padding-top:0}.r4-story-window{min-height:185px}.r4-story-panel p{font-size:.96rem}.r4-story-panel h3{font-size:1.4rem}.r4-count-band>.container{grid-template-columns:repeat(2,minmax(0,1fr))}.r4-count-band a{border-bottom:1px solid var(--r4-line);padding:22px 25px;flex-wrap:nowrap}.r4-count-band a:first-child{padding-left:25px}.r4-count-band a:nth-child(2){border-right:0}.r4-count-band a:nth-child(n+3){border-bottom:0}.r4-count-band a>span:nth-child(2){font-size:.66rem;max-width:110px}.r4-topic-mosaic{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:330px 240px 240px;gap:14px}.r4-topic-1{grid-column:1/3;grid-row:1}.r4-topic-2{grid-column:1;grid-row:2}.r4-topic-3{grid-column:2;grid-row:2}.r4-topic-4{grid-column:1;grid-row:3}.r4-topic-5{grid-column:2;grid-row:3}.r4-topic-6{grid-column:1/3;grid-row:4;min-height:240px}.r4-topic-1 h3{font-size:2rem}.r4-topic-copy h3,.r4-topic-3 h3,.r4-topic-4 h3{font-size:1.21rem}.r4-topic-copy>span,.r4-topic-3 .r4-topic-copy>span,.r4-topic-4 .r4-topic-copy>span{font-size:.58rem}.r4-topic-copy p{font-size:.8rem}.r4-topic-4 p{display:block}.r4-topic-2 p{display:none}.r4-topic-3 .r4-topic-copy,.r4-topic-4 .r4-topic-copy{inset-inline:20px}.r4-class-layout{grid-template-columns:1fr}.r4-class-layout>div:first-child{display:grid;grid-template-columns:1fr 1fr;column-gap:25px;align-items:start}.r4-class-layout>div:first-child>.r4-kicker{grid-column:1/-1}.r4-class-layout>div:first-child>h2,.r4-class-layout>div:first-child>p,.r4-class-layout>div:first-child>.r4-text-link{grid-column:1}.r4-class-photo{grid-column:2;grid-row:2/5;margin:0;height:100%;min-height:235px}.r4-class-card{padding:18px;min-height:90px}.r4-class-card strong{font-size:.87rem;max-width:none}.r4-class-card>span:first-child{font-size:1.8rem}.r4-featured-reading{gap:15px}.r4-reading-featured .r4-reading-photo{height:185px}.r4-reading-copy{padding:19px}.r4-reading-copy h3{font-size:1.08rem}.r4-reading-copy p{font-size:.82rem}.r4-home-search>div{gap:9px}.r4-home-search button{font-size:.79rem;padding-inline:18px}.r4-faq-layout{grid-template-columns:1fr;gap:22px}.r4-faq-layout>div:first-child>p{max-width:550px}.r4-contact-layout{grid-template-columns:1fr}.r4-contact-visual{min-height:355px}.r4-contact-visual>div{inset-inline:30px;bottom:27px;max-width:440px}.r4-contact-visual h2{font-size:2.8rem}.r4-contact-visual h2 br{display:none}.r4-contact-visual p{margin-bottom:10px}.r4-contact-phone{margin-block:12px 3px}.r4-contact-form{padding:28px 30px}.r4-region-links{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:520px){.r4-hero,.r4-hero-inner{min-height:665px}.r4-hero-inner{padding-block:43px 95px;align-items:start}.r4-hero-copy{width:100%}.r4-hero h1{font-size:clamp(2.2rem,9.5vw,3.1rem);line-height:1.08;margin-bottom:22px}.r4-hero-eyebrow{font-size:.59rem;letter-spacing:.13em;margin-bottom:23px}.r4-hero-eyebrow:before{width:17px;margin-right:9px}.r4-hero-description{font-size:.98rem;line-height:1.8;min-height:124px;margin-bottom:22px}.r4-hero-actions{gap:10px}.r4-hero-actions .r4-button{font-size:.8rem;padding:12px 15px;min-height:48px;gap:10px}.r4-hero-controls{margin-top:22px;gap:8px}.r4-hero-controls .r4-play{font-size:.68rem;padding-inline:6px;max-width:115px;text-align:left;line-height:1.5}.r4-hero-tabs{width:calc(100% - 36px)}.r4-slide-dot{min-height:49px;padding:5px}.r4-section{padding-block:34px}.r4-home h2{font-size:1.85rem;line-height:1.18}.r4-section-heading{margin-bottom:22px}.r4-kicker{font-size:.63rem;letter-spacing:.11em;margin-bottom:12px}.r4-kicker:before{width:16px;margin-right:8px}.r4-quick-card{padding:16px 13px;gap:8px;align-items:start}.r4-quick-card strong{font-size:.82rem}.r4-quick-card small{font-size:.63rem}.r4-quick-number{font-size:.61rem;margin-top:2px}.r4-quick-card>span:last-child{display:none}.r4-service-mosaic{grid-template-columns:1fr;grid-template-rows:355px 270px 270px;gap:14px}.r4-photo-card.r4-service-major{grid-column:1;grid-row:1}.r4-service-major .r4-photo-copy{inset-inline:24px;bottom:24px}.r4-service-major .r4-photo-copy h3{font-size:2.25rem}.r4-service-major .r4-photo-copy p{font-size:.92rem}.r4-photo-copy{inset-inline:24px;bottom:22px}.r4-photo-copy h3{font-size:1.7rem}.r4-photo-copy p{font-size:.88rem}.r4-card-index{font-size:.6rem}.r4-ribbon>.container{gap:0;justify-content:start;display:grid;grid-template-columns:1fr 1fr;padding-block:9px}.r4-ribbon-link{font-size:.7rem;min-height:44px;gap:8px}.r4-story-photo{min-height:310px;aspect-ratio:1.17}.r4-photo-note{padding:18px;inset:auto 13px 13px}.r4-photo-note strong{font-size:1rem}.r4-photo-note span{font-size:.7rem}.r4-story-window{min-height:249px}.r4-story-panel{padding-top:16px}.r4-story-panel h3{font-size:1.3rem;line-height:1.3}.r4-story-panel p{font-size:.91rem;line-height:1.8}.r4-story-controls button:last-child{font-size:.67rem;padding-inline:7px}.r4-count-band a,.r4-count-band a:first-child{padding:19px 12px;gap:12px}.r4-count-band strong{font-size:2.25rem}.r4-count-band a>span:nth-child(2){font-size:.56rem;max-width:80px}.r4-topic-mosaic{display:grid;grid-template-columns:1fr;grid-template-rows:none;gap:14px}.r4-topic,.r4-topic-1,.r4-topic-2,.r4-topic-3,.r4-topic-4,.r4-topic-5,.r4-topic-6{grid-column:auto;grid-row:auto;min-height:275px}.r4-topic-1{min-height:340px}.r4-topic-copy,.r4-topic-1 .r4-topic-copy,.r4-topic-3 .r4-topic-copy,.r4-topic-4 .r4-topic-copy{inset-inline:24px;bottom:23px}.r4-topic-1 h3{font-size:2rem}.r4-topic-copy h3,.r4-topic-3 h3,.r4-topic-4 h3{font-size:1.6rem}.r4-topic-copy>span,.r4-topic-3 .r4-topic-copy>span,.r4-topic-4 .r4-topic-copy>span{font-size:.59rem}.r4-topic-copy p,.r4-topic-2 p,.r4-topic-3 p,.r4-topic-4 p{font-size:.87rem;display:block}.r4-topic-copy b{font-size:.73rem}.r4-process-grid{grid-template-columns:1fr 1fr;gap:23px 19px;margin-top:24px}.r4-process-grid li{padding-top:16px}.r4-process-grid h3{font-size:1.04rem;margin:9px 0}.r4-process-grid p{font-size:.79rem}.r4-statement{padding-block:33px}.r4-statement .container>span{font-size:.57rem}.r4-statement h2{font-size:1.8rem;line-height:1.25}.r4-statement .r4-button{font-size:.85rem;min-height:48px}.r4-statement:after{font-size:7rem;bottom:-26px}.r4-class-layout>div:first-child{display:block}.r4-class-layout>div:first-child>p{font-size:.9rem}.r4-class-photo{height:190px;min-height:0;margin-top:17px}.r4-class-grid{gap:10px}.r4-class-card{padding:15px 12px;gap:11px;min-height:94px;align-items:start;flex-wrap:wrap}.r4-class-card>span:first-child{font-size:1.6rem}.r4-class-card strong{font-size:.72rem;flex-basis:calc(100% - 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@media(max-width:359px){.r4-hero,.r4-hero-inner{min-height:730px}.r4-hero h1{font-size:2.15rem}.r4-hero-eyebrow{font-size:.53rem;letter-spacing:.08em}.r4-hero-description{font-size:.92rem;min-height:140px}.r4-hero-actions{display:grid;grid-template-columns:1fr}.r4-hero-actions .r4-button{width:100%}.r4-quick-card{padding:15px 10px}.r4-quick-number{display:none}.r4-quick-card strong{font-size:.79rem}.r4-quick-card small{font-size:.62rem}.r4-count-band a,.r4-count-band a:first-child{padding-inline:8px;gap:9px}.r4-count-band strong{font-size:2rem}.r4-count-band a>span:nth-child(2){font-size:.51rem}.r4-class-card{display:block}.r4-class-card strong{display:block;padding-top:10px}.r4-contact-form{padding:22px 17px}.r4-reading-compact{grid-template-columns:82px minmax(0,1fr)}}
@media(prefers-reduced-motion:reduce){.r4-home *{animation:none!important;transition:none!important}.r4-photo-card:hover img,.r4-topic:hover img,.r4-reading-card:hover img{transform:none}.r4-story-panel.is-active{animation:none}}
@media print{.r4-hero-controls,.r4-hero-tabs,.r4-story-controls,.r4-home-search,.r4-contact-form{display:none!important}.r4-hero{min-height:0;background:#fff;color:#111}.r4-hero-images,.r4-hero-shade,.r4-hero-side{display:none}.r4-hero-inner{min-height:0;padding:20px 0}.r4-hero-copy{max-width:none}.r4-hero-description,.r4-hero-eyebrow,.r4-hero h1 strong{color:#111!important}.r4-section{padding-block:20px}.r4-photo-card,.r4-topic,.r4-reading-card{break-inside:avoid}}

/* Explicit non-negative stacking keeps photographs above the hero background. */
.r4-hero-images{z-index:0}.r4-hero-shade{z-index:1}.r4-hero-inner{position:relative;z-index:2}.r4-hero-tabs{z-index:3}

/* Constrain the editorial photograph to narrow viewports. */
@media(max-width:760px){.r4-story-layout{grid-template-columns:minmax(0,1fr)}.r4-story-photo{width:100%;max-width:100%;min-height:0;height:clamp(270px,65vw,420px);aspect-ratio:auto}}

/* Keep the contact portrait and its text above the section surface. */
.r4-contact-visual>img{z-index:0}.r4-contact-visual:after{z-index:1}.r4-contact-visual>div{z-index:2}

/* Leave the right-hand floating actions clear of every slide selector. */
.r4-hero-tabs{padding-right:68px}
@media(max-width:520px){.r4-hero-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.r4-hero-inner{padding-bottom:123px}}
/* Short landscape screens place the two floating actions side by side. */
@media(max-height:500px) and (max-width:1050px){.r4-hero-tabs{padding-right:132px}}