:root{
  /* Gold-ish dark theme */
  --bg:#120e06;
  --panel:#171208;
  --ink:#f4f0e6;
  --muted:#c9c1b2;
  --accent:#d4af37;
  --line:#3a2d14;

  --max:1100px;
  --radius:14px;
  --pad: clamp(16px, 3vw, 24px);
  --gap: clamp(10px, 2vw, 14px);
}

/* ===== Global guards ===== */
*{ box-sizing:border-box; }
html, body{ width:100%; min-height:100%; }

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height:1.55;
  color:var(--ink);
  overflow-x:hidden;

  /* Background system */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

/* ===== Backgrounds per page ===== */
body.bg-gold{
  background-image:
    linear-gradient(
      rgba(18,14,6,.68),
      rgba(18,14,6,.68)
    ),
    url("../img/gold.jpeg");
}

body.bg-about{
  background-image:
    linear-gradient(
      rgba(18,14,6,.66),
      rgba(18,14,6,.66)
    ),
    url("../img/about.jpeg");
}

body.bg-kongo{
  background-image:
    linear-gradient(
      rgba(18,14,6,.65),
      rgba(18,14,6,.65)
    ),
    url("../img/pont-mar.jpeg");
}

body.bg-ops{
  background-image:
    linear-gradient(
      rgba(18,14,6,.67),
      rgba(18,14,6,.67)
    ),
    url("../img/mining-op.jpeg");
}

/* ===== Media ===== */
img, svg, video, canvas{
  max-width:100%;
  height:auto;
  display:block;
}

a{ color:inherit; }

/* ===== Layout ===== */
.container{
  max-width:var(--max);
  margin:0 auto;
  padding: var(--pad);
}

/* ===== Header ===== */
.header{
  border-bottom:1px solid var(--line);
  background:linear-gradient(
    180deg,
    rgba(23,18,8,.92),
    rgba(18,14,6,.92)
  );
  position:sticky;
  top:0;
  backdrop-filter: blur(8px);
  z-index:10;
}

/* Header row */
.header-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top: var(--pad);
  padding-bottom: 12px;
}

/* Centered brand */
.brandline{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  justify-content:center;
}

/* Clickable logo */
.brandlink{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  text-decoration:none;
}

.brand-logo{
  height:44px;
  width:auto;
  display:block;
  border-radius:10px;
  box-shadow: 0 10px 30px rgba(0,0,0,.20);
}

/* ===== Menu button ===== */
.menu-btn{
  width:44px;
  height:44px;
  border-radius:14px;
  border:1px solid rgba(212,175,55,.35);
  background: radial-gradient(circle at 30% 30%, var(--accent), #8a6d1d);
  cursor:pointer;
  display:grid;
  place-items:center;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}

.menu-btn:focus{
  outline:2px solid rgba(212,175,55,.55);
  outline-offset:2px;
}

/* Hamburger */
.menu-icon{
  width:18px;
  height:12px;
  position:relative;
}
.menu-icon::before,
.menu-icon::after,
.menu-icon span{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background: rgba(18,14,6,.85);
  border-radius:2px;
}
.menu-icon::before{ top:0; }
.menu-icon span{ top:5px; }
.menu-icon::after{ bottom:0; }

/* Screen-reader only */
.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  border:0;
}

/* ===== Menu panel ===== */
.menu-panel{
  border-top:1px solid var(--line);
  background: linear-gradient(
    180deg,
    rgba(23,18,8,.96),
    rgba(18,14,6,.96)
  );
  overflow:hidden;
  transform-origin: top;
  animation: menuIn .18s ease-out;
}

@keyframes menuIn{
  from{ opacity:0; transform: translateY(-6px); }
  to{ opacity:1; transform: translateY(0); }
}

@keyframes menuOut{
  from{ opacity:1; transform: translateY(0); }
  to{ opacity:0; transform: translateY(-6px); }
}

.menu-panel.is-closing{
  animation: menuOut .14s ease-in forwards;
}

.menu-nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  padding-bottom: var(--pad);
}

.menu-nav a{
  text-decoration:none;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--muted);
}

.menu-nav a:hover{
  background:rgba(212,175,55,.08);
  border-color:rgba(212,175,55,.35);
  color:var(--ink);
}

/* ===== Content ===== */
.hero{
  padding: clamp(18px, 3vw, 28px) 0 10px;
}

h1{
  margin:0 0 6px;
  font-size: clamp(24px, 3.4vw, 34px);
}

h2{
  font-size: clamp(18px, 2.4vw, 22px);
  margin:0 0 6px;
}

.kicker{
  display:inline-block;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:rgba(212,175,55,.95);
  font-size:12px;
}

p{ margin:10px 0; color:var(--muted); }

.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding: clamp(14px, 2.2vw, 18px);
  margin:14px 0;
}

.grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
}

.small{ font-size:14px; }

/* ===== New split 3D page cards ===== */
.page-card{
  position:relative;
  display:flex;
  flex-direction:column;
  text-decoration:none;
  border:1px solid rgba(212,175,55,.18);
  border-radius:18px;
  overflow:hidden;
  background:rgba(23,18,8,.96);
  box-shadow:
    0 14px 28px rgba(0,0,0,.28),
    0 4px 10px rgba(0,0,0,.22);
  transform: translateY(0);
  transition:
    transform .22s ease,
    box-shadow .22s ease,
    border-color .22s ease;
  min-height:320px;
}

.page-card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:18px;
  pointer-events:none;
  opacity:0;
  transition:opacity .25s ease;
  z-index:2;
  background:
    linear-gradient(
      120deg,
      transparent 30%,
      rgba(212,175,55,.18),
      transparent 70%
    );
}

.page-card:hover{
  transform: translateY(-6px);
  border-color: rgba(212,175,55,.55);
  box-shadow:
    0 22px 38px rgba(0,0,0,.36),
    0 8px 16px rgba(0,0,0,.26),
    0 0 0 1px rgba(212,175,55,.25),
    0 0 22px rgba(212,175,55,.25);
}

.page-card:hover::before{
  opacity:.6;
}

.page-card:active{
  transform: translateY(-2px);
}

.page-card-media{
  position:relative;
  min-height:180px;
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  overflow:hidden;
}

.page-card-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(
    180deg,
    rgba(18,14,6,.10),
    rgba(18,14,6,.34)
  );
  z-index:1;
}

/* High-end moving light sweep */
.page-card-media::before{
  content:"";
  position:absolute;
  top:-20%;
  left:-140%;
  width:65%;
  height:140%;
  z-index:2;
  background:linear-gradient(
    100deg,
    rgba(255,255,255,0) 0%,
    rgba(255,245,210,.08) 35%,
    rgba(255,255,255,.28) 50%,
    rgba(255,240,190,.10) 65%,
    rgba(255,255,255,0) 100%
  );
  transform: skewX(-24deg);
  transition:left .9s ease;
  pointer-events:none;
}

.page-card:hover .page-card-media::before{
  left:140%;
}

.page-card-body{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:16px 18px 18px;
  background:
    linear-gradient(
      180deg,
      rgba(25,19,9,.96),
      rgba(18,14,6,.98)
    );
  flex:1 1 auto;
  position:relative;
  z-index:1;
}

.page-card-title{
  margin:0;
  color:var(--ink);
  font-size: clamp(20px, 2.2vw, 24px);
  line-height:1.2;
}

.page-card-text{
  margin:0;
  color:var(--muted);
  font-size:14px;
}

.page-card-cta{
  margin-top:auto;
  font-weight:700;
  color:var(--ink);
  text-decoration:none;
}

.page-card:hover .page-card-cta{
  color:#fff3cc;
}

/* Optional image utility classes for homepage cards */
.card-img-moba{
  background-image:url("../img/gold.jpeg");
}

.card-img-kongo{
  background-image:url("../img/pont-mar.jpeg");
}

.card-img-producers{
  background-image:url("../img/gold.jpeg");
}

.card-img-ops{
  background-image:url("../img/mining-op.jpeg");
}

/* Language button */
.lang-btn{
  padding:8px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(212,175,55,.10);
  color:var(--ink);
  cursor:pointer;
}

.lang-btn:hover{ background:rgba(212,175,55,.16); }

/* Footer */
.footer{
  border-top:1px solid var(--line);
  margin-top:28px;
  padding-top:18px;
  color:var(--muted);
  font-size:14px;
}

/* ===== Mobile ===== */
@media (max-width:520px){
  body{
    background-attachment: scroll;
  }

  .brandline{
    justify-content:flex-start;
  }

  .brand-logo{
    height:40px;
  }

  .lang-btn{
    padding:10px 12px;
  }

  .menu-nav a{
    flex:1 1 auto;
    text-align:center;
  }

  .page-card{
    min-height:290px;
  }

  .page-card-media{
    min-height:150px;
  }

  .page-card-body{
    padding:14px 16px 16px;
  }

  .page-card-media::before{
    width:80%;
  }
}