/* Project Briefing — scoped page extensions using the existing GMS design system.
   Shared logo sizing, header, footer, palette and typography are unchanged. */
.briefing-breadcrumb{margin-bottom:30px}
.briefing-breadcrumb ol{display:flex;align-items:center;margin:0;padding:0;list-style:none;color:var(--gms-muted);text-transform:uppercase;letter-spacing:.115em;font:500 12px/1.5 var(--gms-font-head)}
.briefing-breadcrumb li{display:flex;align-items:center}
.briefing-breadcrumb li+li::before{content:"/";margin:0 11px;color:inherit}
.briefing-breadcrumb a{color:inherit;text-decoration-line:underline;text-decoration-color:transparent;text-decoration-thickness:1px;text-underline-offset:5px;transition:color var(--gms-transition),text-decoration-color var(--gms-transition)}
.briefing-breadcrumb a:hover,.briefing-breadcrumb a:focus-visible{color:var(--gms-accent-dark);text-decoration-color:currentColor}
.briefing-hero {padding-top:clamp(65px,6vw,102px);padding-bottom:clamp(74px,7vw,120px);overflow-x:clip}
.briefing-hero-grid {min-height:500px}
.briefing-hero h1 {font:500 clamp(43px,4.1vw,70px)/1.16 var(--gms-font-head);letter-spacing:-.083em;margin:19px 0 27px;max-width:930px;word-break:normal;overflow-wrap:normal}
.briefing-hero-lead {font-size:clamp(20px,1.7vw,26px);line-height:1.58;color:var(--gms-ink);max-width:780px;margin-bottom:20px}
.briefing-hero-note {font:400 16px/1.65 var(--gms-font-body);color:var(--gms-body);max-width:670px;margin-bottom:33px}
.briefing-hero-art {min-height:440px;display:flex;justify-content:center;align-items:center;position:relative}
.briefing-hero-ribbon {display:block;width:121%;max-width:none;max-height:550px;object-fit:contain;mix-blend-mode:multiply;user-select:none}
.briefing-intro {padding-top:clamp(95px,9vw,160px);padding-bottom:clamp(100px,10vw,165px)}
.briefing-section-title {font:500 clamp(34px,3.35vw,55px)/1.24 var(--gms-font-head);letter-spacing:-.073em;margin:21px 0 25px;word-break:normal;overflow-wrap:normal}
.briefing-intro-copy {padding-left:clamp(0px,2vw,36px)}
.briefing-statement,.briefing-strong-intro {font:500 clamp(23px,2.1vw,34px)/1.52 var(--gms-font-head);letter-spacing:-.05em;color:var(--gms-ink);margin-bottom:32px}
.briefing-intro-copy>p:not(.briefing-statement),.briefing-contribution p:not(.briefing-strong-intro) {font-size:18px;line-height:1.76;color:var(--gms-body);margin-bottom:23px}
.briefing-heading-row {padding:clamp(55px,6vw,103px) 0 45px}
.briefing-heading-row>div:last-child>p {font-size:18px;line-height:1.76;color:var(--gms-body);margin-bottom:17px}
.briefing-challenge {padding-bottom:clamp(100px,10vw,165px)}
.briefing-research-art {position:relative;overflow:hidden;background:#eeeeeb;aspect-ratio:2.7;min-height:260px}
.briefing-research-art img {display:block;height:100%;width:100%;object-fit:cover;filter:grayscale(1);transition:transform 700ms ease}
.briefing-research-art:hover img {transform:scale(1.025)}
.briefing-art-label {position:absolute;bottom:21px;left:23px;font:500 11px/1.5 var(--gms-font-head);letter-spacing:.08em;background:rgba(250,250,246,.88);padding:9px 14px}
.briefing-challenge-grid {padding-top:30px}
.briefing-challenge-grid>div+div .briefing-feature {border-left:1px solid var(--gms-line)}
.briefing-feature {min-height:260px;padding:27px clamp(18px,2.6vw,43px);transition:background var(--gms-transition)}
.briefing-challenge-grid>div:first-child .briefing-feature {padding-left:0}
.briefing-feature:hover {background:var(--gms-paper-strong)}
.briefing-feature h3 {font:500 clamp(20px,1.6vw,25px)/1.44 var(--gms-font-head);letter-spacing:-.06em;margin:17px 0 14px}
.briefing-feature p {font-size:16.5px;line-height:1.7;color:var(--gms-body);margin:0}
.briefing-approach {padding-bottom:clamp(110px,11vw,183px)}
.briefing-approach>.row {padding-top:clamp(61px,6.5vw,110px)}
.briefing-side-heading>p {font-size:18px;line-height:1.75;color:var(--gms-body);max-width:475px;margin-bottom:25px}
.briefing-mode-list {border-top:1px solid var(--gms-line)}
.briefing-mode {display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:20px;align-items:start;padding:26px 14px 27px 0;border-bottom:1px solid var(--gms-line);transition:background var(--gms-transition)}
.briefing-mode:hover {background:var(--gms-paper-strong)}
.briefing-mode-number,.briefing-step-index {font:500 12px/1.8 var(--gms-font-head);color:var(--gms-accent-dark)}
.briefing-mode h3,.briefing-annotation h3 {font:500 clamp(20px,1.7vw,26px)/1.35 var(--gms-font-head);letter-spacing:-.06em;margin:0 0 7px}
.briefing-mode p {font-size:16.5px;color:var(--gms-body);line-height:1.58;margin:0}
.briefing-mode code {font:500 14px/1.5 var(--gms-font-head);background:var(--gms-paper);padding:8px 11px;color:var(--gms-ink);white-space:nowrap;margin-top:5px}
.briefing-annotation {background:var(--gms-paper-strong);padding:35px clamp(26px,3vw,47px);margin-top:25px}
.briefing-annotation h3 {margin:16px 0 12px}
.briefing-annotation p {font-size:16.5px;line-height:1.68;margin:0;color:#454b43}
.briefing-research-caveat {margin:21px 0 0;color:var(--gms-muted);font:400 13px/1.7 var(--gms-font-head)}
.briefing-research {padding-bottom:clamp(100px,10vw,162px)}
.briefing-research-steps {border-top:1px solid var(--gms-line)}
.briefing-research-steps article {display:grid;grid-template-columns:minmax(130px,1fr) minmax(0,4fr);align-items:start;gap:clamp(20px,5vw,80px);padding:32px 19px;border-bottom:1px solid var(--gms-line);transition:background var(--gms-transition)}
.briefing-research-steps article:hover {background:var(--gms-paper-strong)}
.briefing-research-steps h3 {font:500 clamp(21px,1.7vw,29px)/1.39 var(--gms-font-head);letter-spacing:-.06em;margin:0 0 12px}
.briefing-research-steps p {font-size:17px;line-height:1.73;color:var(--gms-body);max-width:800px;margin:0}
.briefing-contribution {padding-bottom:clamp(108px,10vw,164px)}
.briefing-contribution>.row {padding-top:clamp(66px,7vw,116px)}
.briefing-contribution-metrics {border-top:1px solid var(--gms-line);margin-top:29px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
.briefing-contribution-metrics>div {padding:22px 14px 15px;transition:background var(--gms-transition)}
.briefing-contribution-metrics>div:first-child {padding-left:0}
.briefing-contribution-metrics>div+div {border-left:1px solid var(--gms-line)}
.briefing-contribution-metrics>div:hover {background:var(--gms-paper-strong)}
.briefing-contribution-metrics span {display:block;font:500 12px/1.4 var(--gms-font-head);color:var(--gms-accent-dark);margin-bottom:11px}
.briefing-contribution-metrics strong {font:500 15px/1.52 var(--gms-font-head);letter-spacing:-.04em;display:block;margin-bottom:8px}
.briefing-contribution-metrics p {font-size:15px!important;line-height:1.58!important;margin:0!important}
.briefing-collaboration {padding-bottom:clamp(105px,10vw,158px)}
.briefing-audience-grid {border-top:1px solid var(--gms-line)}
.briefing-audience-grid>div {border-bottom:1px solid var(--gms-line)}
.briefing-audience-grid>div:nth-child(2n) {border-left:1px solid var(--gms-line)}
.briefing-audience {min-height:260px;padding:35px clamp(28px,4vw,65px);transition:background var(--gms-transition)}
.briefing-audience-grid>div:nth-child(2n+1) .briefing-audience {padding-left:10px}
.briefing-audience:hover {background:var(--gms-paper-strong)}
.briefing-audience h3 {font:500 clamp(21px,1.8vw,29px)/1.35 var(--gms-font-head);letter-spacing:-.065em;margin:22px 0 16px}
.briefing-audience p {font-size:17px;line-height:1.73;color:var(--gms-body);max-width:510px;margin:0}
.briefing-community-link {display:flex;justify-content:flex-end;margin-top:28px}
.briefing-status {padding-bottom:clamp(96px,9vw,150px)}
.briefing-status-grid {padding:32px 0 29px;border-top:1px solid var(--gms-line);border-bottom:1px solid var(--gms-line)}
.briefing-status-grid>div+div>.briefing-status-cell {border-left:1px solid var(--gms-line)}
.briefing-status-cell {min-height:162px;padding:19px clamp(24px,3.1vw,52px)}
.briefing-status-grid>div:first-child .briefing-status-cell {padding-left:0}
.briefing-status-cell strong {display:block;font:500 clamp(26px,2.5vw,40px)/1.27 var(--gms-font-head);letter-spacing:-.08em;margin:19px 0 11px}
.briefing-status-cell p {color:var(--gms-body);font-size:16px;line-height:1.6;margin:0}
.briefing-status-links {display:flex;flex-wrap:wrap;gap:25px 42px;margin-top:23px}
.briefing-invitation {padding-bottom:clamp(100px,11vw,175px)}
.briefing-invitation-panel {background:var(--gms-paper-strong);padding:clamp(45px,5vw,80px) clamp(26px,5vw,78px)}
.briefing-invitation h2 {font:500 clamp(31px,3vw,48px)/1.31 var(--gms-font-head);letter-spacing:-.078em;max-width:870px;margin:20px 0 22px}
.briefing-invitation p {font-size:18px;line-height:1.73;color:#465043;max-width:850px;margin:0}
.briefing-invitation .btn-accent {white-space:nowrap}
.briefing-contact-note {max-width:245px;font:400 12px/1.55 var(--gms-font-head);color:var(--gms-muted);text-align:right}
@media(max-width:1199.98px){.briefing-hero h1{font-size:clamp(39px,4.3vw,60px)}.briefing-hero-art{min-height:365px}.briefing-hero-ribbon{width:114%}.briefing-mode{grid-template-columns:30px minmax(0,1fr)}.briefing-mode code{grid-column:2;width:max-content}}
@media(max-width:991.98px){.briefing-hero-grid{min-height:0}.briefing-hero{padding-top:65px}.briefing-hero-art{min-height:300px;max-height:380px}.briefing-hero-ribbon{width:min(90%,550px)}.briefing-intro-copy{padding-left:0}.briefing-research-art{aspect-ratio:2.2}.briefing-approach>.row{padding-top:70px}.briefing-side-heading{margin-bottom:8px}.briefing-contribution-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}.briefing-invitation-panel{padding:55px 45px}.briefing-contact-note{text-align:left}}
@media(max-width:767.98px){.briefing-hero{padding-top:43px;padding-bottom:66px}.briefing-hero h1{font-size:clamp(37px,8.8vw,55px)}.briefing-hero-lead{font-size:19px}.briefing-hero-art{min-height:270px}.briefing-intro{padding:68px 0 93px}.briefing-statement{font-size:23px}.briefing-heading-row{padding:60px 0 34px}.briefing-research-art{min-height:0;aspect-ratio:1.65}.briefing-art-label{font-size:9px;bottom:10px;left:10px}.briefing-challenge-grid>div+div .briefing-feature{border-left:none;border-top:1px solid var(--gms-line)}.briefing-feature,.briefing-challenge-grid>div:first-child .briefing-feature{min-height:0;padding:26px 8px}.briefing-approach>.row{padding-top:56px}.briefing-research-steps article{grid-template-columns:1fr;gap:10px;padding:27px 9px}.briefing-contribution-metrics{grid-template-columns:1fr}.briefing-contribution-metrics>div{border-bottom:1px solid var(--gms-line);padding:19px 8px}.briefing-contribution-metrics>div+div{border-left:none}.briefing-audience-grid>div:nth-child(2n){border-left:none}.briefing-audience{padding:29px 8px!important;min-height:0}.briefing-status-grid>div+div>.briefing-status-cell{border-left:none;border-top:1px solid var(--gms-line)}.briefing-status-cell,.briefing-status-grid>div:first-child .briefing-status-cell{min-height:0;padding:23px 8px}.briefing-invitation-panel{padding:40px 26px}.briefing-invitation h2{font-size:30px}.briefing-contact-note{text-align:left}.briefing-section-title{font-size:clamp(30px,7.7vw,42px)}}
@media(max-width:420px){.briefing-hero h1{font-size:35px}.briefing-mode{grid-template-columns:25px 1fr;gap:13px}.briefing-annotation{padding:26px 22px}.briefing-hero-art{min-height:220px}.briefing-invitation .btn-accent{white-space:normal}}
@media(prefers-reduced-motion:reduce){.briefing-research-art img,.briefing-feature,.briefing-audience{transition:none!important}}