/* ==========================================================================
   ERF Interdisciplinary Research and Development
   Research Publication Portal - stylesheet
   Palette derived from the official ERF poster (deep green + gold)
   ========================================================================== */

:root{
  --green-900:#0b3d20;
  --green-800:#14532d;
  --green-700:#1b6b3a;
  --green-100:#e7f1ea;
  --gold-600:#a8862f;
  --gold-500:#c8a44a;
  --gold-300:#e8d49a;
  --maroon:#7d1f3f;

  --ink:#16211c;
  --ink-soft:#4a5a51;
  --line:#dfe6e0;
  --paper:#ffffff;
  --paper-alt:#f6f8f6;

  --radius:14px;
  --shadow-sm:0 1px 2px rgba(11,61,32,.06), 0 2px 8px rgba(11,61,32,.05);
  --shadow-md:0 8px 28px rgba(11,61,32,.10);
  --wrap:1160px;
  --serif:"Lora", Georgia, "Times New Roman", serif;
  --sans:"Inter", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.65;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--green-700);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.25;color:var(--green-900);margin:0 0 .5em;}
h1{font-size:clamp(2rem,4.2vw,3.05rem);letter-spacing:-.5px;}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem);}
h3{font-size:1.2rem;}
p{margin:0 0 1em;}
.wrap{width:min(var(--wrap),92vw);margin-inline:auto;}

/* ---------- Ribbon / topbar ---------- */
.topbar{
  background:var(--green-900);
  color:#dff0e5;
  font-size:.82rem;
  letter-spacing:.02em;
}
.topbar .wrap{display:flex;flex-wrap:wrap;gap:.35rem 1.4rem;justify-content:space-between;padding:.5rem 0;}
.topbar a{color:var(--gold-300);}
.topbar span{display:inline-flex;align-items:center;gap:.4rem;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.site-header .wrap{display:flex;align-items:center;gap:1rem;padding:.7rem 0;position:relative;}
.brand{display:flex;align-items:center;gap:.75rem;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand .seal{width:52px;height:52px;flex:none;}
.brand-text strong{
  display:block;font-family:var(--serif);font-weight:700;
  color:var(--green-900);font-size:1.02rem;line-height:1.15;letter-spacing:-.2px;
}
.brand-text small{display:block;color:var(--ink-soft);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;}

.nav{margin-left:auto;display:flex;align-items:center;gap:.15rem;}
.nav a{
  padding:.5rem .8rem;border-radius:8px;color:var(--ink);
  font-size:.92rem;font-weight:500;
}
.nav a:hover{background:var(--green-100);color:var(--green-800);text-decoration:none;}
.nav a.active{color:var(--green-800);font-weight:600;box-shadow:inset 0 -2px 0 var(--gold-500);}
.nav .btn{margin-left:.5rem;}

.nav-toggle{
  margin-left:auto;display:none;border:1px solid var(--line);background:#fff;
  width:42px;height:38px;border-radius:9px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--green-900);margin:3px auto;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.68rem 1.25rem;border-radius:999px;
  font-size:.92rem;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn-primary{background:var(--green-800);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--green-700);color:#fff;}
.btn-gold{background:var(--gold-500);color:#26200c;}
.btn-gold:hover{background:var(--gold-300);color:#26200c;}
.btn-ghost{background:transparent;color:var(--green-800);border-color:var(--green-800);}
.btn-ghost:hover{background:var(--green-100);}
.btn-light{background:#fff;color:var(--green-900);}
.btn-light:hover{background:var(--green-100);color:var(--green-900);}
.btn-outline-light{border-color:rgba(255,255,255,.6);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1100px 460px at 88% -12%, rgba(200,164,74,.34), transparent 60%),
    linear-gradient(155deg,var(--green-900) 0%, var(--green-800) 58%, #0e4626 100%);
  background-color:var(--green-900);
}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;padding:4.2rem 0 4rem;align-items:center;}
.hero h1{color:#fff;margin-bottom:.35em;}
.hero p.lead{font-size:1.09rem;color:#d8e8dd;max-width:56ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;font-weight:600;
  color:var(--gold-300);border:1px solid rgba(232,212,154,.4);
  padding:.35rem .8rem;border-radius:999px;margin-bottom:1.2rem;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.6rem;}
.hero-stats{display:flex;flex-wrap:wrap;gap:2.2rem;margin-top:2.6rem;padding-top:1.6rem;border-top:1px solid rgba(255,255,255,.16);}
.hero-stats b{display:block;font-family:var(--serif);font-size:1.85rem;color:var(--gold-300);line-height:1;}
.hero-stats span{font-size:.8rem;color:#c9ddd0;letter-spacing:.05em;}

/* Issue cover card */
.cover{
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-md);
  padding:1.6rem;color:var(--ink);border-top:6px solid var(--gold-500);
}
.cover .kicker{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-600);font-weight:700;}
.cover h3{margin:.4rem 0 .2rem;font-size:1.35rem;}
.cover .meta{font-size:.85rem;color:var(--ink-soft);margin-bottom:1rem;}
.cover ul{list-style:none;margin:0 0 1.1rem;padding:0;border-top:1px solid var(--line);}
.cover ul li{padding:.6rem 0;border-bottom:1px solid var(--line);font-size:.9rem;}
.cover ul li a{font-weight:600;color:var(--green-800);}
.cover ul li em{display:block;font-style:normal;color:var(--ink-soft);font-size:.8rem;}

/* ---------- Sections ---------- */
section{padding:4rem 0;}
.section-alt{background:var(--paper-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:64ch;margin-bottom:2.2rem;}
.section-head .eyebrow{color:var(--gold-600);border-color:var(--gold-300);}
.section-head p{color:var(--ink-soft);}
.section-head.center{margin-inline:auto;text-align:center;}

/* ---------- Grid + cards ---------- */
.grid{display:grid;gap:1.4rem;}
.g-2{grid-template-columns:repeat(2,1fr);}
.g-3{grid-template-columns:repeat(3,1fr);}
.g-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem;box-shadow:var(--shadow-sm);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--gold-300);}
.card .ico{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--green-100);color:var(--green-800);margin-bottom:.9rem;font-size:1.25rem;
}
.card h3{margin-bottom:.35em;font-size:1.08rem;}
.card p{font-size:.92rem;color:var(--ink-soft);margin:0;}

/* ---------- Article list ---------- */
.article{
  display:grid;grid-template-columns:96px 1fr auto;gap:1.4rem;align-items:start;
  padding:1.5rem;border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  margin-bottom:1rem;transition:border-color .18s ease, box-shadow .18s ease;
}
.article:hover{border-color:var(--gold-300);box-shadow:var(--shadow-sm);}
.article .vol{text-align:center;border-right:1px solid var(--line);padding-right:1rem;}
.article .vol b{display:block;font-family:var(--serif);font-size:1.5rem;color:var(--green-800);line-height:1;}
.article .vol span{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);}
.article h3{font-size:1.12rem;margin-bottom:.3em;}
.article h3 a{color:var(--green-900);}
.article .authors{font-size:.88rem;color:var(--ink-soft);margin:0 0 .55rem;}
.article .excerpt{font-size:.9rem;color:var(--ink-soft);margin:0 0 .7rem;}
.article .acts{display:flex;flex-direction:column;gap:.5rem;align-items:stretch;min-width:132px;}
.article .acts .btn{justify-content:center;padding:.5rem .9rem;font-size:.82rem;}

.tags{display:flex;flex-wrap:wrap;gap:.4rem;}
.tag{
  font-size:.73rem;letter-spacing:.03em;padding:.22rem .65rem;border-radius:999px;
  background:var(--green-100);color:var(--green-800);font-weight:600;
}
.tag.gold{background:#fbf3dd;color:var(--gold-600);}
.tag.maroon{background:#f7e9ee;color:var(--maroon);}

/* ---------- Filters ---------- */
.filters{
  display:flex;flex-wrap:wrap;gap:.7rem;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1rem 1.1rem;margin-bottom:1.8rem;box-shadow:var(--shadow-sm);
}
.filters input[type=search],.filters select{
  font:inherit;font-size:.92rem;padding:.6rem .85rem;border:1px solid var(--line);
  border-radius:9px;background:var(--paper-alt);color:var(--ink);
}
.filters input[type=search]{flex:1 1 260px;}
input:focus,select:focus,textarea:focus{outline:2px solid var(--gold-500);outline-offset:1px;background:#fff;}
.result-count{font-size:.85rem;color:var(--ink-soft);margin-left:auto;}
.empty{
  text-align:center;padding:2.5rem;border:1px dashed var(--line);border-radius:var(--radius);
  color:var(--ink-soft);background:var(--paper-alt);
}

/* ---------- Partners ---------- */
.logos{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;}
.logo-chip{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.15rem 1rem;text-align:center;box-shadow:var(--shadow-sm);
}
.logo-chip b{display:block;font-family:var(--serif);color:var(--green-800);font-size:1.02rem;}
.logo-chip span{font-size:.76rem;color:var(--ink-soft);}

/* ---------- Steps ---------- */
.steps{counter-reset:step;display:grid;gap:1.1rem;}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:1.1rem;align-items:start;
  padding:1.25rem 1.4rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
}
.step::before{
  counter-increment:step;content:counter(step);
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--green-800);color:var(--gold-300);font-weight:700;font-family:var(--serif);
}
.step h3{margin-bottom:.25em;font-size:1.05rem;}
.step p{margin:0;font-size:.92rem;color:var(--ink-soft);}

/* ---------- Article page ---------- */
.doc{display:grid;grid-template-columns:1fr 300px;gap:2.6rem;align-items:start;}
.doc-body{font-size:1.02rem;}
.doc-body h2{margin-top:2rem;font-size:1.4rem;}
.doc-body h2:first-child{margin-top:0;}
.doc-body ul,.doc-body ol{padding-left:1.2rem;color:var(--ink-soft);}
.doc-body li{margin-bottom:.4rem;}
.abstract{
  background:var(--paper-alt);border-left:4px solid var(--gold-500);
  padding:1.3rem 1.5rem;border-radius:0 var(--radius) var(--radius) 0;margin-bottom:1.8rem;
}
.abstract h2{margin-top:0;font-size:1.05rem;letter-spacing:.06em;text-transform:uppercase;}
.sidecard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.3rem;box-shadow:var(--shadow-sm);margin-bottom:1.2rem;
}
.sidecard h4{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-600);margin-bottom:.8rem;}
.sidecard dl{margin:0;font-size:.88rem;}
.sidecard dt{color:var(--ink-soft);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;margin-top:.75rem;}
.sidecard dd{margin:.1rem 0 0;font-weight:600;color:var(--green-900);}
.cite{
  font-size:.85rem;background:var(--paper-alt);border:1px dashed var(--line);
  border-radius:10px;padding:.9rem;color:var(--ink-soft);
}
.breadcrumb{font-size:.83rem;color:var(--ink-soft);margin-bottom:1.2rem;}
.breadcrumb a{color:var(--ink-soft);}

/* ---------- Page banner ---------- */
.page-head{
  background:linear-gradient(140deg,var(--green-900),var(--green-800) 70%, var(--green-700));
  color:#fff;padding:3rem 0 2.6rem;position:relative;overflow:hidden;
}
.page-head::before{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,164,74,.35),transparent 65%);
}
.page-head h1{color:#fff;margin-bottom:.2em;position:relative;}
.page-head p{color:#cfe2d6;max-width:62ch;margin:0;position:relative;}

/* ---------- Forms ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem;box-shadow:var(--shadow-sm);}
.field{margin-bottom:1.1rem;}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.35rem;color:var(--green-900);}
.field input,.field select,.field textarea{
  width:100%;font:inherit;font-size:.94rem;padding:.7rem .85rem;
  border:1px solid var(--line);border-radius:10px;background:var(--paper-alt);color:var(--ink);
}
.field textarea{min-height:130px;resize:vertical;}
.field .hint{font-size:.78rem;color:var(--ink-soft);margin-top:.3rem;}
.form-note{font-size:.85rem;color:var(--ink-soft);margin-top:1rem;}
.notice{
  background:#fbf3dd;border:1px solid var(--gold-300);color:#6b5518;
  border-radius:10px;padding:.9rem 1.1rem;font-size:.9rem;margin-top:1.1rem;display:none;
}
.notice.show{display:block;}

/* ---------- Table ---------- */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);}
table{border-collapse:collapse;width:100%;font-size:.92rem;background:#fff;min-width:520px;}
th,td{text-align:left;padding:.85rem 1rem;border-bottom:1px solid var(--line);}
th{background:var(--green-100);color:var(--green-900);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;}
tr:last-child td{border-bottom:0;}

/* ---------- CTA band ---------- */
.cta{background:linear-gradient(120deg,var(--green-800),var(--green-900));color:#fff;text-align:center;}
.cta h2{color:#fff;}
.cta p{color:#cfe2d6;max-width:60ch;margin-inline:auto;}
.cta .hero-actions{justify-content:center;}

/* ---------- Footer ---------- */
.site-footer{background:var(--green-900);color:#c6dccd;padding:3rem 0 1.4rem;font-size:.9rem;}
.site-footer h4{color:#fff;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:.9rem;}
.site-footer a{color:#c6dccd;}
.site-footer a:hover{color:var(--gold-300);}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:2rem;}
.foot-grid ul{list-style:none;margin:0;padding:0;}
.foot-grid li{margin-bottom:.45rem;}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.14);margin-top:2.2rem;padding-top:1.1rem;
  display:flex;flex-wrap:wrap;gap:.6rem;justify-content:space-between;font-size:.82rem;color:#9dbcaa;
}
.ribbon{height:6px;background:linear-gradient(90deg,var(--green-700),var(--gold-500) 45%,var(--gold-300) 55%,var(--green-700));}

/* ---------- Responsive ---------- */
@media (min-width:961px){
  .sidecard.sticky{position:sticky;top:96px;}
}
@media (max-width:960px){
  .hero .wrap{grid-template-columns:1fr;gap:2.2rem;padding:3rem 0;}
  .doc{grid-template-columns:1fr;}
  .g-4,.logos{grid-template-columns:repeat(2,1fr);}
  .g-3{grid-template-columns:repeat(2,1fr);}
  .foot-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:760px){
  .nav-toggle{display:block;}
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:.2rem;
    background:#fff;border-bottom:1px solid var(--line);padding:.8rem 4vw 1.2rem;
    box-shadow:var(--shadow-md);
  }
  .nav.open{display:flex;}
  .nav .btn{margin:.4rem 0 0;justify-content:center;}
  .article{grid-template-columns:1fr;}
  .article .vol{display:flex;gap:.5rem;align-items:baseline;text-align:left;border-right:0;border-bottom:1px solid var(--line);padding:0 0 .6rem;}
  .article .acts{flex-direction:row;}
  .g-2,.g-3,.g-4,.logos,.foot-grid{grid-template-columns:1fr;}
  .hero-stats{gap:1.4rem;}
}

/* ---------- quoted source material ---------- */
.quote{
  margin:0 0 .6rem;padding:1.1rem 1.4rem;
  background:var(--paper-alt);border-left:4px solid var(--gold-500);
  border-radius:0 var(--radius) var(--radius) 0;
}
.quote p{margin:0 0 .8rem;font-size:.98rem;}
.quote p:last-child{margin-bottom:0;}
.source{
  font-size:.78rem;color:var(--ink-soft);font-style:italic;
  margin:0 0 1.6rem;letter-spacing:.01em;
}
.hero .source{color:#b9d0c2;margin-bottom:0;}
th{white-space:nowrap;}
table th[scope],tbody th{
  background:var(--green-100);width:1%;white-space:nowrap;
  font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;
}

/* ---------- full text rendered from the issue PDF ---------- */
#fulltext h2{
  margin:2.2rem 0 .8rem;font-size:1.25rem;
  padding-bottom:.4rem;border-bottom:1px solid var(--line);
}
#fulltext h2:first-child{margin-top:0;}
#fulltext p{margin:0 0 1.05em;text-align:justify;hyphens:auto;}
.reflist{
  margin:0 0 1em;padding-left:1.4rem;
  font-size:.9rem;color:var(--ink-soft);
}
.reflist li{margin-bottom:.7rem;line-height:1.55;}
.reflist a{word-break:break-word;}

/* ---------- issue covers rendered from the PDFs ---------- */
.cover-thumb{
  width:64px;height:auto;border:1px solid var(--line);border-radius:6px;
  box-shadow:var(--shadow-sm);margin:0 .35rem .35rem 0;display:inline-block;
}
.cover-thumb:hover{border-color:var(--gold-500);}
.cover-art{
  width:100%;height:auto;border-radius:10px;border:1px solid var(--line);
  margin-bottom:1rem;box-shadow:var(--shadow-sm);
}
img.seal{width:52px;height:auto;flex:none;}

/* ---------- plain crawlable index of every article ---------- */
.plain-index h3{
  font-size:1.02rem;margin:1.6rem 0 .6rem;color:var(--green-800);
  padding-bottom:.35rem;border-bottom:1px solid var(--line);
}
.plain-index h3:first-child{margin-top:0;}
.plain-index ul{margin:0;padding-left:1.2rem;}
.plain-index li{margin-bottom:.45rem;font-size:.92rem;color:var(--ink-soft);line-height:1.5;}
.plain-index a{font-weight:600;color:var(--green-800);}