/* IJSTS — International Journal of Science and Technology for Sustainability
   Design tokens
   Colors: --navy (primary/scholarly), --green (sustainability accent), --gold (sparing highlight),
           --paper (background), --ink (text), --line (hairline rule)
   Type: 'Fraunces' display (scholarly+organic curves), 'Inter' body/UI, 'IBM Plex Mono' data/labels
*/

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400..700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --navy:#13335c;
  --navy-deep:#0c2342;
  --green:#1f7a4d;
  --green-deep:#15532f;
  --gold:#c79a2e;
  --paper:#f6f4ee;
  --paper-dim:#eeebe1;
  --ink:#1c2230;
  --ink-soft:#525a6b;
  --line:#d9d4c5;
  --white:#ffffff;
  --radius:2px;
  --maxw:1140px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',system-ui,sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--navy);text-decoration:none;}
a:hover{color:var(--green);}
a:focus-visible, button:focus-visible{outline:2px solid var(--green);outline-offset:2px;}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}

h1,h2,h3,h4{
  font-family:'Fraunces',serif;
  color:var(--navy-deep);
  margin:0 0 .5em;
  line-height:1.15;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(2.1rem,4vw,3.1rem);font-weight:600;}
h2{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:600;}
h3{font-size:1.2rem;font-weight:600;}
p{margin:0 0 1em;color:var(--ink);}
.lede{font-size:1.1rem;color:var(--ink-soft);}

.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:.72rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--green-deep);
  font-weight:600;
}

/* ===== Header / Nav ===== */
.site-header{
  background:var(--white);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.header-top{display:flex;align-items:center;gap:16px;padding:14px 28px;max-width:var(--maxw);margin:0 auto;}
.brand{display:flex;align-items:center;gap:14px;flex:1;min-width:0;}
.brand img{height:56px;width:56px;flex-shrink:0;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0;}
.brand-text .full{
  font-family:'Fraunces',serif;font-weight:600;font-size:1.05rem;color:var(--navy-deep);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.brand-text .acronym{
  font-family:'IBM Plex Mono',monospace;font-size:.7rem;letter-spacing:.1em;color:var(--green-deep);
}
.header-actions a.submit-btn{
  background:var(--green-deep);color:var(--white);padding:10px 18px;border-radius:var(--radius);
  font-weight:600;font-size:.85rem;white-space:nowrap;
}
.header-actions a.submit-btn:hover{background:var(--navy-deep);color:var(--white);}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius);padding:8px 10px;cursor:pointer;}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--navy);margin:4px 0;}

nav.main-nav{border-top:1px solid var(--line);background:var(--paper-dim);}
nav.main-nav ul{
  max-width:var(--maxw);margin:0 auto;padding:0 28px;display:flex;flex-wrap:wrap;gap:2px 22px;list-style:none;
}
nav.main-nav a{
  display:inline-block;padding:11px 0;font-size:.86rem;font-weight:600;color:var(--ink-soft);
  border-bottom:2px solid transparent;
}
nav.main-nav a:hover, nav.main-nav a.active{color:var(--navy-deep);border-bottom-color:var(--green);}

@media (max-width:880px){
  .menu-toggle{display:block;}
  nav.main-nav{display:none;}
  nav.main-nav.open{display:block;}
  nav.main-nav ul{flex-direction:column;gap:0;}
  nav.main-nav li{border-top:1px solid var(--line);}
  .brand-text .full{font-size:.92rem;}
}

/* ===== Signature divider: circuit-to-leaf ===== */
.veindiv{display:flex;align-items:center;justify-content:center;margin:56px 0;gap:0;}
.veindiv svg{width:min(560px,90%);height:30px;}

/* ===== Hero ===== */
.hero{
  background:linear-gradient(180deg,var(--navy-deep) 0%,var(--navy) 100%);
  color:var(--white);position:relative;overflow:hidden;
}
.hero .wrap{padding:72px 28px 64px;display:grid;grid-template-columns:1.3fr .9fr;gap:48px;align-items:center;}
.hero-logo{
  background:var(--white);border-radius:50%;padding:18px;
  box-shadow:0 18px 50px rgba(0,0,0,.35);justify-self:center;
}
.hero-logo img{width:clamp(170px,22vw,260px);height:auto;}
.hero h1{color:var(--white);}
.hero .eyebrow{color:#9fd6b5;}
.hero p.lede{color:#cdd7e6;max-width:46ch;}
.hero-stats{display:flex;gap:28px;margin-top:28px;flex-wrap:wrap;}
.hero-stats div{font-family:'IBM Plex Mono',monospace;}
.hero-stats .num{font-size:1.5rem;font-weight:600;color:var(--gold);display:block;}
.hero-stats .lbl{font-size:.72rem;color:#aebbd0;letter-spacing:.06em;text-transform:uppercase;}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}
.btn{
  display:inline-block;padding:12px 22px;border-radius:var(--radius);font-weight:600;font-size:.92rem;
  border:1px solid transparent;
}
.btn-primary{background:var(--gold);color:var(--navy-deep);}
.btn-primary:hover{background:#dcb348;color:var(--navy-deep);}
.btn-outline{border-color:#5d7596;color:var(--white);}
.btn-outline:hover{border-color:var(--white);color:var(--white);background:rgba(255,255,255,.08);}

@media (max-width:780px){
  .hero .wrap{grid-template-columns:1fr;text-align:center;}
  .hero-stats{justify-content:center;}
  .hero-cta{justify-content:center;}
}

/* ===== Section blocks ===== */
section.block{padding:54px 0;}
section.block.alt{background:var(--paper-dim);}
.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:24px;margin-bottom:30px;flex-wrap:wrap;}
.section-head a.more{font-size:.85rem;font-weight:600;font-family:'IBM Plex Mono',monospace;}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:36px;}
@media (max-width:780px){.grid-3{grid-template-columns:1fr;}.grid-2{grid-template-columns:1fr;}}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  border-top:3px solid var(--green);
}
.card h3{margin-bottom:8px;}
.card .meta{font-family:'IBM Plex Mono',monospace;font-size:.72rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px;display:block;}

.announce-list{list-style:none;margin:0;padding:0;}
.announce-list li{
  display:flex;gap:18px;padding:16px 0;border-bottom:1px solid var(--line);
}
.announce-list li:first-child{padding-top:0;}
.announce-list .date{
  font-family:'IBM Plex Mono',monospace;font-size:.78rem;color:var(--green-deep);white-space:nowrap;padding-top:2px;min-width:84px;
}

.eic-msg{
  background:var(--white);border:1px solid var(--line);border-left:4px solid var(--navy);padding:30px 32px;border-radius:var(--radius);
  display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:start;
}
.eic-msg .sig{font-family:'Fraunces',serif;font-weight:600;color:var(--navy-deep);margin-top:14px;}
.eic-msg .sig small{display:block;font-family:'Inter';font-weight:400;color:var(--ink-soft);font-size:.82rem;}
.eic-portrait{
  width:84px;height:84px;border-radius:50%;background:var(--paper-dim);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-family:'Fraunces',serif;font-size:1.6rem;color:var(--navy);font-weight:600;
}
@media (max-width:600px){.eic-msg{grid-template-columns:1fr;}}

.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.stat{text-align:center;border:1px solid var(--line);background:var(--white);padding:24px 10px;border-radius:var(--radius);}
.stat .num{font-family:'IBM Plex Mono',monospace;font-size:1.9rem;font-weight:600;color:var(--green-deep);}
.stat .lbl{font-size:.78rem;color:var(--ink-soft);margin-top:4px;}
@media (max-width:780px){.stats-bar{grid-template-columns:repeat(2,1fr);}}

.scope-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.scope-item{
  padding:18px 20px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
}
.scope-item .n{font-family:'IBM Plex Mono',monospace;color:var(--green);font-size:.78rem;}
@media (max-width:780px){.scope-grid{grid-template-columns:1fr;}}

table{width:100%;border-collapse:collapse;margin:18px 0 28px;background:var(--white);}
table caption{text-align:left;font-weight:600;margin-bottom:8px;}
th,td{border:1px solid var(--line);padding:10px 14px;text-align:left;font-size:.92rem;vertical-align:top;}
th{background:var(--paper-dim);font-family:'IBM Plex Mono',monospace;font-size:.72rem;text-transform:uppercase;letter-spacing:.04em;color:var(--navy-deep);}

ul.policy-list{padding-left:1.2em;}
ul.policy-list li{margin-bottom:.4em;}

.page-hero{background:var(--navy-deep);color:var(--white);padding:46px 0 38px;}
.page-hero h1{color:var(--white);margin-bottom:6px;}
.page-hero .eyebrow{color:#9fd6b5;}
.breadcrumb{font-size:.8rem;color:#aebbd0;margin-bottom:10px;font-family:'IBM Plex Mono',monospace;}
.breadcrumb a{color:#cdd7e6;}

.policy-toc{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px;
}
.policy-toc a{
  font-size:.78rem;font-weight:600;border:1px solid var(--line);padding:7px 13px;border-radius:14px;background:var(--white);
  font-family:'IBM Plex Mono',monospace;color:var(--navy);
}
.policy-toc a:hover{border-color:var(--green);color:var(--green-deep);}

.callout{
  background:var(--paper-dim);border-left:4px solid var(--gold);padding:18px 22px;border-radius:var(--radius);margin:22px 0;
}
.callout strong{color:var(--navy-deep);}

dl.faq dt{font-weight:600;color:var(--navy-deep);margin-top:22px;font-family:'Fraunces',serif;font-size:1.05rem;}
dl.faq dd{margin:6px 0 0;color:var(--ink-soft);}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;}
.contact-card{background:var(--white);border:1px solid var(--line);padding:26px;border-radius:var(--radius);}
.contact-card .eyebrow{display:block;margin-bottom:6px;}
@media (max-width:780px){.contact-grid{grid-template-columns:1fr;}}

/* ===== Footer ===== */
footer.site-footer{background:var(--navy-deep);color:#c4cee0;margin-top:40px;}
footer .wrap{padding:48px 28px 28px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
footer h4{color:var(--white);font-size:.85rem;font-family:'IBM Plex Mono',monospace;letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px;}
footer ul{list-style:none;padding:0;margin:0;}
footer li{margin-bottom:8px;font-size:.86rem;}
footer a{color:#c4cee0;}
footer a:hover{color:var(--gold);}
.footer-brand{display:flex;gap:12px;align-items:flex-start;}
.footer-brand img{width:48px;height:48px;}
.footer-brand p{color:#9fb0cc;font-size:.85rem;}
.footer-bottom{border-top:1px solid #1f3f6a;padding:16px 28px;text-align:center;font-size:.78rem;color:#8294b3;}
@media (max-width:780px){footer .wrap{grid-template-columns:1fr 1fr;}}
@media (max-width:480px){footer .wrap{grid-template-columns:1fr;}}

.skip-link{position:absolute;left:-999px;}
.skip-link:focus{left:8px;top:8px;background:var(--white);padding:6px 10px;z-index:100;}