/* ============================================================
   Institute for Technology Stewardship — Design System v3
   Navy authority + rich teal accent — matched to logo
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap");

/* ---------- Tokens ---------- */
:root{
  /* Navy scale — matched to logo navy */
  --navy-900:#0A1628;
  --navy-800:#0F2440;
  --navy-700:#163358;
  --navy-600:#1E4470;
  --navy-500:#2A5A8E;

  /* Teal scale — matched to logo teal */
  --teal-700:#0B7A70;
  --teal-600:#0D9488;
  --teal-500:#14B8A6;
  --teal-400:#2DD4BF;
  --teal-300:#5EEAD4;

  /* Supporting — warm amber */
  --amber-600:#D97706;
  --amber-500:#F59E0B;
  --amber-400:#FBBF24;

  /* Blue (supporting) */
  --blue-600:#2563EB;
  --blue-500:#3B82F6;

  /* Gold alias */
  --gold-600:#D97706;
  --gold-500:#F59E0B;

  /* Slate neutrals */
  --slate-950:#020617;
  --slate-900:#0F172A;
  --slate-800:#1E293B;
  --slate-700:#334155;
  --slate-600:#475569;

  /* Paper / surface */
  --paper:#FFFFFF;
  --paper-2:#F8FAFC;
  --paper-3:#F1F5F9;
  --white:#FFFFFF;

  /* Ink */
  --ink:#0F172A;
  --ink-2:#475569;
  --ink-3:#94A3B8;

  /* Lines */
  --line:#E2E8F0;
  --line-2:#CBD5E1;
  --line-navy:rgba(255,255,255,.12);

  /* Type stack */
  --serif:'Instrument Serif', Georgia, 'Times New Roman', serif;
  --sans:'Outfit', system-ui, -apple-system, sans-serif;
  --mono:'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Layout */
  --maxw:1200px;
  --gutter:clamp(20px, 5vw, 64px);
  --radius:8px;
  --radius-lg:14px;

  /* Shadows */
  --shadow-sm:0 1px 3px rgba(15,23,42,.06),0 1px 2px rgba(15,23,42,.04);
  --shadow:0 16px 48px -16px rgba(10,22,40,.18),0 8px 20px -10px rgba(10,22,40,.10);
  --shadow-lg:0 28px 64px -20px rgba(10,22,40,.22),0 12px 32px -14px rgba(10,22,40,.12);

  /* Easing */
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);

  /* Brand gradient (navy→teal) */
  --gradient-brand:linear-gradient(135deg, var(--navy-700) 0%, var(--teal-600) 100%);
  --gradient-teal:linear-gradient(135deg, var(--teal-600) 0%, var(--teal-400) 100%);
  --gradient-subtle:linear-gradient(135deg, rgba(13,148,136,.06) 0%, rgba(22,51,88,.06) 100%);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.65;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:400;line-height:1.08;letter-spacing:-.01em}
p{margin:0}
::selection{background:var(--teal-600);color:#fff}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.wrap-wide{max-width:1360px;margin:0 auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(64px,9vw,128px)}
.section--tight{padding-block:clamp(48px,6vw,84px)}
.topline{border-top:1px solid var(--line)}

/* ---------- Type helpers ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--teal-600);
  font-weight:500;
  display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{
  content:"";width:26px;height:2px;background:var(--teal-600);display:inline-block;border-radius:2px;
}
.eyebrow--plain::before{display:none}
.display{
  font-family:var(--serif);
  font-size:clamp(2.6rem,5.6vw,4.6rem);
  line-height:1.02;
  letter-spacing:-.025em;
  font-weight:400;
}
.h1{font-family:var(--serif);font-size:clamp(2.1rem,4vw,3.2rem);line-height:1.06;font-weight:400;letter-spacing:-.02em}
.h2{font-family:var(--serif);font-size:clamp(1.7rem,2.8vw,2.5rem);line-height:1.12;font-weight:400;letter-spacing:-.015em}
.h3{font-family:var(--serif);font-size:clamp(1.3rem,1.7vw,1.6rem);line-height:1.2;font-weight:400}
.lead{font-size:clamp(1.15rem,1.6vw,1.36rem);line-height:1.6;color:var(--ink-2);font-weight:300}
.serif-it{font-family:var(--serif);font-style:italic}
.muted{color:var(--ink-2)}
.measure{max-width:62ch}
.measure-sm{max-width:46ch}

/* ---------- Gradient text ---------- */
.gradient-text{
  background:var(--gradient-brand);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--sans);font-weight:600;font-size:.95rem;letter-spacing:.005em;
  padding:.85em 1.6em;border-radius:var(--radius);
  border:1px solid transparent;transition:all .3s var(--ease);
  white-space:nowrap;position:relative;overflow:hidden;
}
.btn .ar{transition:transform .3s var(--ease)}
.btn:hover .ar{transform:translateX(4px)}
.btn--primary{background:var(--navy-800);color:#fff;border-color:var(--navy-800)}
.btn--primary:hover{background:var(--navy-700);box-shadow:0 12px 28px -8px rgba(10,22,40,.4);transform:translateY(-1px)}
.btn--teal{background:var(--teal-600);color:#fff;border-color:var(--teal-600)}
.btn--teal:hover{background:var(--teal-700);box-shadow:0 12px 28px -8px rgba(13,148,136,.4);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--navy-700);color:var(--navy-800);background:rgba(15,36,64,.03)}
.btn--onnavy{background:#fff;color:var(--navy-800);border-color:#fff}
.btn--onnavy:hover{background:var(--paper-2);box-shadow:0 12px 28px -8px rgba(0,0,0,.25)}
.btn--ghost-navy{background:transparent;color:#fff;border-color:rgba(255,255,255,.25)}
.btn--ghost-navy:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.textlink{
  display:inline-flex;align-items:center;gap:.5em;
  font-weight:600;color:var(--teal-600);font-size:.95rem;
  border-bottom:1px solid transparent;transition:.25s;
}
.textlink .ar{transition:transform .3s var(--ease)}
.textlink:hover{color:var(--teal-700)}
.textlink:hover .ar{transform:translateX(4px)}

/* ---------- Tags / badges ---------- */
.tag{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-2);font-weight:500;
}
.badge{
  display:inline-flex;align-items:center;gap:.45em;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;
  padding:.45em .8em;border-radius:100px;border:1px solid var(--line-2);
  color:var(--ink-2);font-weight:500;background:var(--white);
}
.badge--active{color:var(--teal-700);border-color:rgba(13,148,136,.3);background:rgba(13,148,136,.06)}
.badge--active .dot{width:6px;height:6px;border-radius:50%;background:var(--teal-600)}
.badge--soon{color:var(--ink-3);background:transparent}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(16px);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid transparent;
  transition:border-color .3s, box-shadow .3s;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 12px rgba(10,22,40,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}
.brand{display:flex;align-items:center;gap:11px}
.brand__mark{width:34px;height:34px;flex:none}
.brand__img{height:38px;width:auto;flex:none;display:block}
.brand__text{display:flex;flex-direction:column;line-height:1}
.brand__name{font-family:var(--sans);font-size:1.08rem;font-weight:800;color:var(--navy-800);letter-spacing:-.018em}
.brand__name .t{color:var(--teal-600)}
.brand__sub{font-family:var(--mono);font-size:.58rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);margin-top:4px}
.nav__links{display:flex;align-items:center;gap:4px}
.nav__links a{
  font-size:.92rem;font-weight:500;color:var(--ink-2);padding:.55em .8em;border-radius:var(--radius);
  position:relative;transition:color .2s, background .2s;
}
.nav__links a:hover{color:var(--ink);background:var(--paper-2)}
.nav__links a.active{color:var(--navy-800);font-weight:600}
.nav__links a.active::after{
  content:"";position:absolute;left:.8em;right:.8em;bottom:.1em;height:2px;background:var(--teal-600);border-radius:2px;
}
.nav__right{display:flex;align-items:center;gap:14px}
.nav__cta{font-size:.9rem;font-weight:600}
.nav__toggle{display:none;width:42px;height:42px;border:1px solid var(--line-2);border-radius:var(--radius);background:var(--white);align-items:center;justify-content:center}
.nav__toggle span{display:block;width:18px;height:1.5px;background:var(--navy-800);position:relative}
.nav__toggle span::before,.nav__toggle span::after{content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--navy-800);transition:.25s}
.nav__toggle span::before{top:-5px}.nav__toggle span::after{top:5px}

/* mobile drawer */
.mobile-nav{position:fixed;inset:0;z-index:60;background:var(--paper);transform:translateY(-100%);transition:transform .4s var(--ease);visibility:hidden;display:flex;flex-direction:column}
.mobile-nav.open{transform:translateY(0);visibility:visible}
.mobile-nav__top{display:flex;align-items:center;justify-content:space-between;height:74px;padding-inline:var(--gutter);border-bottom:1px solid var(--line)}
.mobile-nav__close{font-size:1.8rem;background:none;border:none;color:var(--navy-800);line-height:1}
.mobile-nav__links{display:flex;flex-direction:column;padding:24px var(--gutter);gap:4px;overflow:auto}
.mobile-nav__links a{font-family:var(--serif);font-size:1.7rem;padding:.4em 0;color:var(--navy-800);border-bottom:1px solid var(--line)}
.mobile-nav__links a:last-child{border-bottom:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-900);color:#cdd8e2}
.footer-cta{border-bottom:1px solid var(--line-navy)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-block:64px}
.footer-brand .brand__name{color:#fff}
.footer-brand .brand__sub{color:#7d93a8}
.footer-blurb{margin-top:18px;font-size:.95rem;color:#94A3B8;max-width:32ch}
.footer-col h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:#64748B;margin-bottom:16px;font-weight:500}
.footer-col a{display:block;font-size:.95rem;color:#CBD5E1;padding:.32em 0;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--line-navy);padding-block:24px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;font-size:.83rem;color:#64748B}
.footer-bottom a{color:#94A3B8}
.footer-social{display:flex;gap:10px}
.footer-social a{width:38px;height:38px;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#94A3B8;transition:.2s}
.footer-social a:hover{border-color:var(--teal-400);color:var(--teal-400);background:rgba(13,148,136,.08)}

/* ---------- Cards ---------- */
.card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(13,148,136,.2)}

/* pillar card */
.pillar{display:flex;flex-direction:column;padding:34px 32px;min-height:300px;position:relative;overflow:hidden}
.pillar__glyph{width:48px;height:48px;color:var(--teal-600);margin-bottom:auto}
.pillar.soon{background:var(--paper-2)}
.pillar.soon .pillar__glyph{color:var(--ink-3)}
.pillar__num{position:absolute;top:26px;right:28px;font-family:var(--mono);font-size:.72rem;color:var(--ink-3);letter-spacing:.1em}
.pillar__name{margin:22px 0 10px;font-family:var(--serif);font-size:1.48rem;font-weight:400;line-height:1.15;max-width:14ch}
.pillar__desc{font-size:.96rem;color:var(--ink-2);margin-bottom:20px}
.pillar__foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto}

/* article card */
.article-card{display:flex;flex-direction:column;height:100%}
.article-card__body{padding:26px 26px 30px;display:flex;flex-direction:column;flex:1}
.article-card__meta{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.article-card__title{font-family:var(--serif);font-size:1.32rem;line-height:1.2;font-weight:400;margin-bottom:12px;transition:color .2s}
.article-card:hover .article-card__title{color:var(--teal-700)}
.article-card__excerpt{font-size:.96rem;color:var(--ink-2);margin-bottom:20px;flex:1}
.dot-sep{width:3px;height:3px;border-radius:50%;background:var(--line-2)}

/* ---------- Forms ---------- */
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:.82rem;font-weight:600;color:var(--ink);letter-spacing:.01em}
.field label .req{color:var(--teal-600)}
.input,.select,.textarea{
  font-family:var(--sans);font-size:1rem;color:var(--ink);
  padding:.85em 1em;border:1px solid var(--line-2);border-radius:var(--radius);
  background:var(--white);transition:border-color .2s, box-shadow .2s;width:100%;
}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--teal-500);box-shadow:0 0 0 3px rgba(13,148,136,.12)}
.textarea{resize:vertical;min-height:140px}
.select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2355616B' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1em center;padding-right:2.6em}

/* ---------- Newsletter band ---------- */
.newsletter{background:var(--navy-800);color:#fff;position:relative;overflow:hidden}
.newsletter__motif{position:absolute;right:-60px;top:50%;transform:translateY(-50%);opacity:.06;color:#fff;pointer-events:none}
.news-form{display:flex;gap:12px;flex-wrap:wrap}
.news-form .input{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.15);color:#fff;flex:1;min-width:180px;border-radius:var(--radius)}
.news-form .input::placeholder{color:rgba(255,255,255,.4)}
.news-form .input:focus{border-color:var(--teal-400);box-shadow:0 0 0 3px rgba(13,148,136,.2)}

/* ---------- Misc ---------- */
.rule{height:1px;background:var(--line);border:none;margin:0}
.kicker-row{display:flex;align-items:baseline;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:44px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.stat{font-family:var(--serif);font-size:clamp(2.4rem,4vw,3.4rem);font-weight:400;color:var(--teal-600);line-height:1}
.stat-label{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin-top:8px}

/* page hero (interior pages) */
.page-hero{padding-block:clamp(56px,7vw,96px) clamp(40px,5vw,64px);position:relative;overflow:hidden}
.page-hero__inner{max-width:760px}
.breadcrumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin-bottom:22px;display:flex;gap:10px;align-items:center}
.breadcrumb a:hover{color:var(--teal-600)}

/* pill filters (research page) */
.pill{font-family:var(--sans);font-weight:600;font-size:.86rem;padding:.55em 1em;border-radius:100px;border:1px solid var(--line-2);background:var(--white);color:var(--ink-2);transition:.2s}
.pill:hover{border-color:var(--navy-700);color:var(--navy-800)}
.pill.is-active{background:var(--navy-800);border-color:var(--navy-800);color:#fff}

/* reveal animations */
.reveal{opacity:1;transform:none}
@keyframes its-rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
@keyframes its-fade{from{opacity:0}to{opacity:1}}
@keyframes its-scale{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:none}}
html.js .reveal{animation:its-rise .7s var(--ease) both}
html.js .reveal-fade{animation:its-fade .8s var(--ease) both}
html.js .reveal-scale{animation:its-scale .7s var(--ease) both}
html.js.reveal-done .reveal,
html.js.reveal-done .reveal-fade,
html.js.reveal-done .reveal-scale{animation:none;opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html.js .reveal,html.js .reveal-fade,html.js .reveal-scale{animation:none}
}

/* affiliations bar */
.affil-row{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.affil-logo{font-family:var(--serif);font-weight:400;font-size:1.5rem;color:var(--ink-3);letter-spacing:.02em;transition:color .25s;opacity:.85}
.affil-logo:hover{color:var(--teal-600)}
.affil-logo small{font-family:var(--mono);font-size:.5em;letter-spacing:.1em;vertical-align:super}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:860px){
  .nav__links,.nav__cta{display:none}
  .nav__toggle{display:flex}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
}
@media (max-width:680px){
  body{font-size:16px}
  .footer-grid{grid-template-columns:1fr}
}