/* International Black Sea Club — Heritage Archive
   Theme: documentary / archival, deep sea-blue + brass on parchment.
   Content is visible with CSS alone — no visibility is ever gated on JS. */

:root{
  --sea-900:#0b2f45;
  --sea-800:#0f3d56;
  --sea-700:#15597a;
  --sea-500:#2a7ba3;
  --brass:#c99a3f;
  --brass-dark:#a97f2c;
  --paper:#f7f3ea;
  --paper-2:#efe8d8;
  --ink:#20303a;
  --ink-soft:#4c5b64;
  --line:#ddd3bf;
  --white:#ffffff;
  --maxw:1120px;
  --readw:760px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Source Sans 3",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.68;
  font-size:1.06rem;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--sea-700);text-underline-offset:2px;}
a:hover{color:var(--brass-dark);}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem;}

/* Skip link */
.skip{position:absolute;left:-9999px;top:0;background:var(--sea-800);color:#fff;padding:.6rem 1rem;z-index:200;}
.skip:focus{left:.5rem;top:.5rem;}

/* Header / nav */
.site-head{
  background:var(--sea-800);
  color:#eaf1f5;
  border-bottom:3px solid var(--brass);
  position:sticky;top:0;z-index:100;
}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:70px;}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:#fff;}
.brand-mark{font-size:1.7rem;color:var(--brass);line-height:1;}
.brand-txt{display:flex;flex-direction:column;line-height:1.1;}
.brand-name{font-family:"Playfair Display",Georgia,serif;font-weight:700;font-size:1.12rem;letter-spacing:.2px;}
.brand-sub{font-size:.7rem;text-transform:uppercase;letter-spacing:.18em;color:var(--brass);margin-top:2px;}
.site-nav ul{display:flex;gap:.2rem;list-style:none;margin:0;padding:0;flex-wrap:wrap;}
.site-nav a{
  display:block;color:#dbe6ec;text-decoration:none;padding:.55rem .7rem;border-radius:5px;
  font-weight:600;font-size:.92rem;transition:background .15s,color .15s;
}
.site-nav a:hover{background:rgba(255,255,255,.10);color:#fff;}
.site-nav a.active{color:var(--sea-900);background:var(--brass);}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:.4rem;flex-direction:column;gap:5px;}
.nav-toggle span{display:block;width:26px;height:3px;background:#fff;border-radius:2px;}

/* Main column */
.main-col{padding:2.4rem 1.25rem 3rem;}
.content{max-width:var(--readw);margin:0 auto;}
.content h1{
  font-family:"Playfair Display",Georgia,serif;font-weight:800;
  font-size:2.35rem;line-height:1.14;color:var(--sea-900);margin:.2rem 0 1rem;
}
.content h2{
  font-family:"Playfair Display",Georgia,serif;font-weight:700;
  font-size:1.55rem;color:var(--sea-800);margin:2.1rem 0 .7rem;
  padding-bottom:.35rem;border-bottom:1px solid var(--line);
}
.content h3{font-size:1.2rem;color:var(--sea-800);margin:1.4rem 0 .4rem;}
.content p{margin:0 0 1.1rem;}
.content ul,.content ol{margin:0 0 1.2rem;padding-left:1.3rem;}
.content li{margin:.35rem 0;}
.content figure{margin:1.4rem 0 1.7rem;}
.content figure img{
  width:100%;border-radius:8px;border:1px solid var(--line);
  box-shadow:0 10px 30px -14px rgba(11,47,69,.5);
}
.content strong{color:var(--sea-900);}
.content a{font-weight:600;}

/* Home hero: first figure on the homepage reads big */
body.home .content > figure:first-of-type img{max-height:none;}

/* Disclaimer callouts */
.disclaimer{
  background:var(--paper-2);border-left:4px solid var(--brass);
  padding:1rem 1.15rem;border-radius:0 8px 8px 0;font-size:.98rem;color:var(--ink-soft);
  margin:0 0 1.5rem;
}
.disclaimer strong{color:var(--sea-900);}
.disclaimer-mini{
  font-size:.92rem;color:var(--ink-soft);background:var(--paper-2);
  border-left:3px solid var(--brass);padding:.55rem .85rem;border-radius:0 6px 6px 0;margin:0 0 1.2rem;
}

/* Footer */
.site-foot{background:var(--sea-900);color:#c7d5dd;margin-top:2rem;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2rem;padding:2.6rem 1.25rem 1.6rem;}
.foot-col h3{
  font-family:"Playfair Display",Georgia,serif;color:#fff;font-size:1.05rem;
  margin:0 0 .7rem;padding-bottom:.35rem;border-bottom:1px solid rgba(255,255,255,.15);
}
.foot-about p{font-size:.92rem;line-height:1.6;color:#adbfc9;margin:0;}
.foot-links{list-style:none;margin:0;padding:0;columns:2;}
.foot-links li{margin:.25rem 0;}
.foot-links a,.foot-cities a{color:#c7d5dd;text-decoration:none;font-size:.9rem;}
.foot-links a:hover,.foot-cities a:hover{color:var(--brass);}
.foot-cities{font-size:.9rem;line-height:1.9;margin:0;}
.foot-base{border-top:1px solid rgba(255,255,255,.12);padding:1rem 1.25rem 1.8rem;}
.foot-base p{margin:0;font-size:.82rem;color:#8ea4af;}

/* CSS-only entrance — ends visible, fill-mode both; default state is VISIBLE.
   No JS is involved; if this rule is ignored, content still shows. */
@media (prefers-reduced-motion: no-preference){
  .fade-up{animation:fadeUp .7s ease both;}
}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}

/* Safeguard: never let scroll-reveal markup trap content invisible */
[data-aos]{opacity:1 !important;transform:none !important;}

/* Responsive */
@media (max-width: 860px){
  .nav-toggle{display:flex;}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;background:var(--sea-800);
    border-bottom:3px solid var(--brass);max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .site-nav.open{max-height:640px;}
  .site-nav ul{flex-direction:column;padding:.4rem .9rem 1rem;gap:.1rem;}
  .site-nav a{padding:.7rem .6rem;font-size:1rem;}
  .foot-grid{grid-template-columns:1fr;gap:1.4rem;}
  .foot-links{columns:2;}
  .content h1{font-size:1.95rem;}
}
@media (max-width: 480px){
  .brand-name{font-size:1rem;}
  .content h1{font-size:1.7rem;}
}