/* =========================================================
   BICHACHI DIAMONDS / APP — FOUNDATION DESIGN SYSTEM
   Palette (LOCKED):
   - Midnight Navy   #0E1A24
   - Deep Blue Slate #1C2A36
   - Steel Blue Gray #5E6A73
   - Soft Ivory      #F2F4F6
   - Pale Gold       #BFA77A
   Rules: flat, no gradients, no shadows.
========================================================= */

:root{
  --bg:#0E1A24;
  --panel:#1C2A36;
  --muted:#5E6A73;
  --text:#F2F4F6;
  --gold:#BFA77A;

  --max:1120px;

  --r-xs:10px;
  --r-sm:12px;
  --r-md:18px;
  --r-lg:24px;

  --line: rgba(242,244,246,.14);
  --line-strong: rgba(242,244,246,.20);

  --pad-xs:10px;
  --pad-sm:14px;
  --pad-md:18px;
  --pad-lg:26px;

  --gap-xs:8px;
  --gap-sm:10px;
  --gap-md:14px;
  --gap-lg:18px;
  --gap-xl:26px;

  --fs-12:12px;
  --fs-13:13px;
  --fs-14:14px;
  --fs-16:16px;
  --fs-18:18px;

  --lh-tight:1.12;
  --lh:1.6;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

/* Base */
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  letter-spacing:.2px;
}
a{ color:inherit; text-decoration:none; }
a:focus{ outline:2px solid rgba(191,167,122,.8); outline-offset:2px; }

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 18px 60px;
}

/* Typography */
.kicker{
  margin:0 0 10px;
  font-size: var(--fs-12);
  letter-spacing: .8px;
  text-transform: uppercase;
  color: rgba(242,244,246,.68);
}
.h1{
  margin:0 0 12px;
  font-size: clamp(28px, 3.4vw, 46px);
  line-height: var(--lh-tight);
  font-weight: 780;
}
.h2{
  margin:0 0 10px;
  font-size: var(--fs-18);
  font-weight: 740;
  letter-spacing:.2px;
}
.p{
  margin:0 0 14px;
  color: rgba(242,244,246,.82);
  line-height: var(--lh);
  font-size: var(--fs-14);
  max-width: 82ch;
}
.small{
  font-size: 13.5px;
  line-height: 1.55;
  color: rgba(242,244,246,.80);
}
.muted{ color: rgba(242,244,246,.72); }
.accent{ color: rgba(191,167,122,.95); font-weight: 650; }

/* Sections */
.section{
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 650;
  font-size: var(--fs-13);
  border: 1px solid rgba(191,167,122,.55);
  background: transparent;
  color: var(--text);
  white-space: nowrap;
  cursor: pointer;
}
.btn:hover{ border-color: rgba(191,167,122,.95); }
.btn.secondary{
  border-color: var(--line);
  color: rgba(242,244,246,.88);
}
.btn.secondary:hover{ border-color: var(--line-strong); }

/* Panels / Cards */
.panel{
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(255,255,255,.02);
  padding: var(--pad-md);
}
.card{
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(255,255,255,.02);
  padding: var(--pad-md);
}

/* Tags + minimal dividers */
.tag{
  font-size: var(--fs-12);
  color: rgba(242,244,246,.68);
  text-transform: uppercase;
  letter-spacing: .7px;
  display:flex;
  align-items:center;
  gap: 10px;
}
.bar{
  width: 26px;
  height: 1px;
  background: rgba(191,167,122,.9);
}
.dot{
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--gold);
  opacity: .95;
}

/* Layout helpers */
.row{ display:flex; gap: var(--gap-sm); flex-wrap: wrap; align-items:center; }
.grid-2{ display:grid; grid-template-columns: 1fr 1fr; gap: var(--gap-lg); }
.grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-md); }
@media (max-width: 980px){
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
}

/* Header (shared) */
.site-header{
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.site-header-inner{
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: var(--gap-sm);
}
.logo-slot{
  width: 180px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--r-xs);
  background: rgba(255,255,255,.02);
}
.nav{
  display:flex;
  gap: 12px;
  align-items:center;
  flex-wrap: wrap;
  justify-content:flex-end;
}
.nav a{
  font-size: var(--fs-13);
  color: rgba(242,244,246,.86);
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav a:hover{
  border-color: var(--line);
  background: rgba(255,255,255,.02);
}
@media (max-width: 520px){
  .logo-slot{ width: 150px; }
}

/* Footer (shared) */
.site-footer{
  margin-top: 36px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: var(--gap-md);
}
@media (max-width: 900px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px){
  .footer-grid{ grid-template-columns: 1fr; }
}
.foot h3{
  margin:0 0 10px;
  font-size: var(--fs-13);
  text-transform: uppercase;
  letter-spacing: .7px;
  color: rgba(242,244,246,.70);
}
.foot a{
  display:block;
  padding: 6px 0;
  font-size: var(--fs-13);
  color: rgba(242,244,246,.84);
}
.foot a:hover{ color: rgba(191,167,122,.95); }
.legal{
  margin-top: 14px;
  color: rgba(242,244,246,.58);
  font-size: var(--fs-12);
  line-height: 1.45;
  display:flex;
  justify-content:space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.video-embed{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  border-radius:16px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.04);
}
.video-embed iframe{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
}
.ecosystem{
  margin: 80px 0;
  padding: 48px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 20px;
  background: rgba(255,255,255,.03);
}
.ecosystem h2{
  margin-bottom: 12px;
}
.ecosystem p{
  max-width: 720px;
  margin-bottom: 16px;
}