/* ============================================================
   Institute for American-British Relations
   Editorial "think tank" design system
   Display: Newsreader (serif)  ·  Text/UI: Public Sans
   Palette: warm canvas / paper / ink, with brand blue + red
            used sparingly as accents, navy for dark bands.
   Edit design tokens below in one place.
   ============================================================ */
:root{
  --blue:#0048A8;        /* brand (logo)            */
  --blue-deep:#00337A;
  --red:#C01010;         /* brand accent (sparing)  */
  --red-dark:#98070A;
  --navy:#0B1B36;        /* dark bands / footer     */
  --navy-deep:#07132A;
  --ink:#16191F;         /* primary text            */
  --ink-soft:#2C333F;
  --slate:#5C6674;       /* secondary text          */
  --canvas:#F5F2EC;      /* warm page background     */
  --paper:#FFFFFF;
  --line:#E1DBCF;        /* hairline on canvas       */
  --line-strong:#CFC7B6;
  --line-dark:rgba(255,255,255,.16);
  --maxw:1220px;
  --gutter:min(6vw,5.5rem);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Public Sans",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--canvas);
  line-height:1.62;font-size:1.02rem;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}

h1,h2,h3,h4{font-family:"Newsreader","Times New Roman",Georgia,serif;font-weight:400;color:var(--ink);
  line-height:1.08;letter-spacing:-.015em}
h1{font-size:clamp(2.5rem,5.4vw,4.15rem)}
h2{font-size:clamp(1.75rem,3.4vw,2.6rem)}
h3{font-size:1.28rem;letter-spacing:-.01em}
p{color:var(--ink-soft)}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
em{font-style:italic}

.wrap{width:min(var(--maxw),92vw);margin-inline:auto}
.wrap-narrow{width:min(760px,92vw);margin-inline:auto}
section{padding:clamp(3.2rem,7vw,6rem) 0}
.center{text-align:center}
.lead{font-size:1.16rem;line-height:1.6;color:var(--ink-soft)}
.muted{color:var(--slate)}

/* ---------- Kicker (letterspaced label) ---------- */
.kicker{font-family:"Public Sans",sans-serif;font-size:.72rem;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;color:var(--red);display:inline-flex;align-items:center;gap:.7rem;margin-bottom:1rem}
.kicker::before{content:"";width:28px;height:1px;background:var(--red)}
.kicker.plain::before{display:none}
.kicker.light{color:#E4B9BB}
.kicker.light::before{background:#E4B9BB}
.kicker.slate{color:var(--slate)}
.kicker.slate::before{background:var(--line-strong)}
.center .kicker{justify-content:center}

/* ---------- Logos ---------- */
.brand-logo{display:block;width:215px;height:58px;background:url("../img/logo.png") left center/contain no-repeat}
.brand-logo.white{background-image:url("../img/logo-white.png")}
.footer-logo{width:250px;height:68px}
.brandlock{display:flex;align-items:center;gap:.85rem}
.a250{height:44px;width:auto;align-self:center;padding-left:.85rem;border-left:1px solid var(--line-strong)}
@media(max-width:520px){.brandlock{gap:.65rem}.a250{height:34px;padding-left:.65rem}}

/* ---------- Utility bar ---------- */
.util{background:var(--navy);color:#C9D3E6}
.util .wrap{display:flex;align-items:center;justify-content:space-between;min-height:38px;
  font-size:.72rem;letter-spacing:.14em;text-transform:uppercase}
.util .u-left{color:#93A2BE;font-weight:600}
.util .u-right{display:flex;gap:1.6rem}
.util .u-right a{color:#C9D3E6;font-weight:600;transition:color .15s}
.util .u-right a:hover{color:#fff}
@media(max-width:760px){.util .u-left{display:none}.util .wrap{justify-content:flex-end}}

/* ---------- Header / nav ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(245,242,236,.94);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:1.5rem;padding:.85rem 0}
.navlinks{display:flex;gap:2rem;margin-left:auto;flex-wrap:wrap}
.navlinks a{font-size:.82rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);
  padding:.35rem 0;border-bottom:1.5px solid transparent;transition:color .15s,border-color .15s}
.navlinks a:hover{color:var(--blue)}
.navlinks a.active{color:var(--blue);border-color:var(--red)}
.nav-cta{display:flex;align-items:center;gap:.7rem;margin-left:.4rem}
.burger{display:none;background:none;border:0;color:var(--ink);cursor:pointer}
.mobile{display:none;flex-direction:column;padding-bottom:1rem}
.mobile a{padding:.7rem .2rem;font-weight:600;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-soft);border-bottom:1px solid var(--line)}
@media(max-width:940px){
  .navlinks{display:none}
  .nav-cta .btn:not(.burger){display:none}
  .burger{display:inline-flex}
  .mobile.open{display:flex}
}

/* ---------- Buttons & links ---------- */
.btn{display:inline-flex;align-items:center;gap:.55rem;font-family:"Public Sans",sans-serif;
  font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  padding:.85rem 1.6rem;border-radius:2px;border:1.5px solid transparent;cursor:pointer;
  transition:background .18s,color .18s,border-color .18s,transform .18s}
.btn .arw{transition:transform .18s}
.btn:hover .arw{transform:translateX(4px)}
.btn-solid{background:var(--navy);color:#fff}
.btn-solid:hover{background:var(--navy-deep)}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark)}
.btn-line{border-color:var(--line-strong);color:var(--ink)}
.btn-line:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn-light{border-color:rgba(255,255,255,.5);color:#fff}
.btn-light:hover{background:#fff;color:var(--navy)}
.btn-lg{padding:1rem 1.9rem;font-size:.8rem}

.arrow-link{display:inline-flex;align-items:center;gap:.5rem;font-size:.76rem;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;color:var(--ink);
  padding-bottom:.3rem;border-bottom:1.5px solid var(--red);transition:gap .18s,color .18s}
.arrow-link .arw{color:var(--red);transition:transform .18s}
.arrow-link:hover{color:var(--blue)}
.arrow-link:hover .arw{transform:translateX(4px)}
.arrow-link.light{color:#fff;border-color:#E4B9BB}
.arrow-link.light .arw{color:#E4B9BB}

/* ---------- Image slots (replace with photos) ---------- */
.img-slot{position:relative;display:block;width:100%;aspect-ratio:4/3;overflow:hidden;
  background:linear-gradient(135deg,#e7ebf3 0%,#efe9e6 55%,#e9edf4 100%);border:1px solid var(--line)}
.img-slot.tall{aspect-ratio:3/4}
.img-slot.wide{aspect-ratio:16/9}
.img-slot.hero{aspect-ratio:5/4}
.img-slot::after{content:attr(aria-label);position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  padding:1rem;text-align:center;font-size:.76rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#9aa4b6}
.img-slot img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.img-slot img+*{display:none}

/* ---------- Photographic hero ---------- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;isolation:isolate}
.hero .hero-bg{position:absolute;inset:0;z-index:-2;
  background:url("../img/hero.jpg") center 28%/cover no-repeat}
.hero .hero-bg::after{content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(6,17,38,.94) 0%,rgba(6,17,38,.78) 34%,rgba(6,17,38,.42) 64%,rgba(6,17,38,.30) 100%),
    linear-gradient(0deg,rgba(6,17,38,.85) 0%,rgba(6,17,38,.10) 42%,rgba(6,17,38,.25) 100%)}
.hero .wrap{position:relative;display:flex;flex-direction:column;justify-content:center;
  min-height:clamp(480px,74vh,720px);padding:clamp(3rem,7vw,5rem) 0}
.hero .hero-inner{max-width:44rem}
.hero h1{color:#fff;max-width:16ch;margin-bottom:1.3rem}
.hero .stand{font-size:1.2rem;line-height:1.58;color:#D7DFEE;max-width:46ch}
.hero-actions{display:flex;gap:1.4rem;flex-wrap:wrap;align-items:center;margin-top:2rem}
@media(max-width:860px){
  .hero .hero-bg{background-position:center 22%}
  .hero .hero-bg::after{background:
    linear-gradient(0deg,rgba(6,17,38,.92) 0%,rgba(6,17,38,.45) 55%,rgba(6,17,38,.55) 100%)}
  .hero .wrap{justify-content:flex-end;min-height:clamp(460px,72vh,640px)}
}

/* thin flag-inspired rule */
.flagrule{height:3px;width:72px;background:linear-gradient(90deg,var(--blue) 0 50%,var(--red) 50% 100%);margin-bottom:2rem}
.center .flagrule{margin-inline:auto}
.hero .flagrule{box-shadow:0 0 0 1px rgba(255,255,255,.08)}

/* ---------- Stat strip ---------- */
.stripe{background:var(--navy);color:#fff;padding-block:0}
.stripe .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;padding:1.35rem 0}
.stripe .s b{font-family:"Newsreader",serif;font-size:1.3rem;font-weight:500;display:block}
.stripe .s span{color:#AEBCD6;font-size:.9rem}
.stripe .s{padding-left:1.3rem;border-left:2px solid rgba(255,255,255,.25);display:flex;align-items:center}
@media(max-width:760px){.stripe .wrap{grid-template-columns:1fr;gap:1.1rem}}

/* ---------- Page hero (interior) ---------- */
.page-hero{position:relative;overflow:hidden;isolation:isolate;background:var(--navy);color:#fff}
.page-hero-bg{position:absolute;inset:0;z-index:0;background-position:center;background-size:cover;background-repeat:no-repeat}
.page-hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,19,42,.90) 0%,rgba(7,19,42,.66) 52%,rgba(7,19,42,.48) 100%),
             linear-gradient(0deg,rgba(7,19,42,.55),rgba(7,19,42,.12) 60%)}
.page-hero .wrap{position:relative;z-index:1;padding:clamp(2.8rem,6vw,4.5rem) 0}
.page-hero.has-photo .wrap{padding:clamp(4rem,9vw,6.5rem) 0}
.page-hero h1{color:#fff;max-width:20ch}
.page-hero p{color:#CBD5E8;max-width:60ch;margin-top:1.1rem;font-size:1.12rem}

/* ---------- Layout helpers ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,4.5vw,4rem);align-items:center}
.split.reverse .prose{order:2}
@media(max-width:820px){.split{grid-template-columns:1fr}.split.reverse .prose{order:0}}
.prose h2{margin-bottom:.8rem}
.prose h3{margin-bottom:.5rem;color:var(--blue)}
.prose p{margin-bottom:1.05rem}
.prose p:last-child{margin-bottom:0}
.section-alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:60ch}
.section-head.center{margin-inline:auto}
.section-head h2{margin-bottom:.6rem}

/* ---------- Numbered research index ---------- */
.index{margin-top:2.5rem;border-top:1px solid var(--line-strong)}
.index .row{display:grid;grid-template-columns:auto 1fr auto;gap:clamp(1.2rem,3vw,2.6rem);align-items:start;
  padding:2rem 0;border-bottom:1px solid var(--line-strong)}
.index .no{font-family:"Newsreader",serif;font-size:2.2rem;color:var(--line-strong);line-height:1}
.index .row:hover .no{color:var(--red)}
.index .rt h3{font-size:1.6rem;color:var(--ink);margin-bottom:.5rem}
.index .rt p{max-width:62ch;color:var(--ink-soft)}
.index .ra{align-self:center}
@media(max-width:760px){.index .row{grid-template-columns:auto 1fr}.index .ra{grid-column:2;margin-top:1rem}}

/* ---------- Article / commentary cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.4rem,3vw,2.2rem);margin-top:2.6rem}
@media(max-width:860px){.grid-3{grid-template-columns:1fr}}
.article{display:flex;flex-direction:column;background:transparent}
.article .thumb{aspect-ratio:16/10;margin-bottom:1.1rem}
.article .cat{font-size:.7rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--red);margin-bottom:.6rem}
.article h3{font-family:"Newsreader",serif;font-size:1.4rem;line-height:1.15;color:var(--ink);margin-bottom:.6rem}
.article:hover h3{color:var(--blue)}
.article p{font-size:.98rem;color:var(--ink-soft);margin-bottom:.8rem}
.article .meta{margin-top:auto;font-size:.82rem;color:var(--slate);letter-spacing:.02em}

/* ---------- Pull quote band ---------- */
.quote{background:var(--navy);color:#fff}
.quote .wrap{max-width:960px;text-align:center}
.quote blockquote{font-family:"Newsreader",serif;font-weight:400;font-size:clamp(1.5rem,3.2vw,2.35rem);
  line-height:1.32;letter-spacing:-.01em;color:#fff}
.quote blockquote em{color:#9DB4DC}
.quote cite{display:block;margin-top:1.6rem;font-family:"Public Sans",sans-serif;font-style:normal;
  font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#AEBCD6}

/* ---------- Checklist ---------- */
.checklist{list-style:none;margin-top:1.1rem;display:grid;gap:.65rem}
.checklist li{position:relative;padding-left:1.7rem;color:var(--ink-soft)}
.checklist li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;background:var(--blue);
  transform:rotate(45deg)}

/* ---------- Leadership / scholars ---------- */
.people{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(1.6rem,4vw,3rem);max-width:820px;margin:2.6rem auto 0}
@media(max-width:640px){.people{grid-template-columns:1fr;max-width:360px}}
.person .img-slot{aspect-ratio:1/1;margin-bottom:1.1rem;filter:grayscale(1) contrast(1.02)}
.person:hover .img-slot{filter:none}
.person h3{font-size:1.35rem;color:var(--ink);margin-bottom:.2rem}
.person .role{font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:.7rem}
.person p{font-size:.96rem;color:var(--ink-soft)}
.person .email{display:inline-block;margin-top:.6rem;font-size:.9rem;font-weight:600;color:var(--blue);word-break:break-all}

/* ---------- Giving tiers ---------- */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-top:2.6rem}
@media(max-width:820px){.tiers{grid-template-columns:1fr}}
.tier{background:var(--paper);border:1px solid var(--line-strong);padding:2rem 1.8rem;display:flex;flex-direction:column}
.tier.feature{border-color:var(--blue);border-top:3px solid var(--blue)}
.tier .tname{font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--slate)}
.tier .amt{font-family:"Newsreader",serif;font-size:1.85rem;color:var(--ink);margin:.4rem 0 .2rem}
.tier p{font-size:.96rem;color:var(--ink-soft);margin:.7rem 0 1.4rem}
.tier .btn{margin-top:auto;justify-content:center}

/* ---------- Newsletter band ---------- */
.newsletter{background:var(--canvas);border-top:1px solid var(--line)}
.newsletter .wrap{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.6rem,4vw,3.5rem);align-items:center}
.newsletter form{display:flex;gap:.6rem;flex-wrap:wrap}
.newsletter input{flex:1;min-width:220px;font-family:inherit;font-size:1rem;padding:.85rem 1rem;
  border:1px solid var(--line-strong);border-radius:2px;background:var(--paper)}
.newsletter input:focus{outline:2px solid var(--blue);border-color:var(--blue)}
@media(max-width:820px){.newsletter .wrap{grid-template-columns:1fr}}

/* ---------- CTA band ---------- */
.cta-band{background:var(--navy);color:#fff;text-align:center}
.cta-band h2{color:#fff;max-width:24ch;margin:0 auto .8rem}
.cta-band p{color:#CBD5E8;max-width:54ch;margin:0 auto 1.8rem}
.cta-band .hero-actions{justify-content:center}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,4.5vw,4rem)}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1.1rem}
.field label{font-size:.74rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--slate)}
.field input,.field textarea{font-family:inherit;font-size:1rem;padding:.8rem .9rem;
  border:1px solid var(--line-strong);border-radius:2px;background:var(--paper);color:var(--ink)}
.field input:focus,.field textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.info-row{display:flex;gap:1rem;align-items:flex-start;padding:.9rem 0;border-bottom:1px solid var(--line)}
.info-row .k{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--slate);min-width:5rem;padding-top:.15rem}
.info-row .v{color:var(--ink-soft)}

/* ---------- Footer ---------- */
footer{background:var(--navy);color:#B9C5DC;padding:3.6rem 0 1.8rem}
footer .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2.4rem;padding-bottom:2.2rem;border-bottom:1px solid var(--line-dark)}
@media(max-width:820px){footer .cols{grid-template-columns:1fr;gap:1.8rem}}
footer p{color:#98A6C1;font-size:.92rem;margin-top:1rem;max-width:40ch}
footer h4{font-family:"Public Sans",sans-serif;font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:#7E8FAD;margin-bottom:1rem}
footer .fcol a{display:block;color:#B9C5DC;font-size:.94rem;padding:.3rem 0;transition:color .15s}
footer .fcol a:hover{color:#fff}
footer .legal{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:1.4rem;font-size:.8rem;color:#7E8FAD;letter-spacing:.02em}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}