/* ===== Container: fill parent width ===== */
.oeukfns-wrap {
  max-width: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}

/* ===== Main card ===== */
.oeukfns-card {
  width: 100%;
  display: flex;
  flex-direction: column;

  background: #004080;
  border: 6px solid transparent;
  border-radius: 16px;
  border-image: linear-gradient(180deg, #87CEEB 0%, #006994 100%) 1;

  box-shadow: 0 10px 40px rgba(0,0,0,.25);
  color: #fff;
  overflow: hidden;
}

/* ===== Header ===== */
.oeukfns-header {
  padding: clamp(16px, 2.5vw, 32px) clamp(16px, 3vw, 40px) 0 clamp(16px, 3vw, 40px);
}
.oeukfns-header h2 {
  margin: 0 0 8px 0;
  font-size: clamp(20px, 3.4vw, 35px);
  line-height: 1.15;
  text-shadow: 0 2px 4px rgba(0,0,0,.4);
}
.oeukfns-sub {
  margin: 0 0 12px 0;
  opacity: .9;
  font-size: clamp(14px, 1.4vw, 18px);
}

/* ===== Tabs ===== */
.oeukfns-tabs {
  display: inline-flex;
  gap: 8px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 12px;
  padding: 6px;
}
.oeukfns-tab {
  background: transparent;
  color: #fff;
  border: 0;
  padding: clamp(8px, 1.2vw, 12px) clamp(12px, 1.6vw, 18px);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  font-size: clamp(14px, 1.4vw, 18px);
}
.oeukfns-tab--active { background: #fff; color: #0b2545; }

/* ===== Body & footer ===== */
.oeukfns-quiz-body,
.oeukfns-lb-body {
  padding: clamp(16px, 2.5vw, 32px) clamp(16px, 3vw, 40px) clamp(20px, 3vw, 40px);
}
.oeukfns-footer {
  padding: clamp(12px, 2vw, 24px) clamp(16px, 3vw, 40px) clamp(20px, 3vw, 40px);
}

/* ===== Buttons ===== */
.oeukfns-btn {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.2;
  padding: clamp(12px, 1.4vw, 16px) clamp(16px, 2vw, 22px);
  border-radius: 12px;
  border: 0;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(0,0,0,.25);
  transition: transform .12s ease;
}
.oeukfns-btn:hover { transform: translateY(-2px); }
.oeukfns-primary { background: #fff; color: #0b2545; }
.oeukfns-secondary {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.35);
}

/* ===== Quiz question cards ===== */
.oeukfns-q-card {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 14px;
  padding: clamp(14px, 2vw, 20px);
  margin-bottom: clamp(12px, 2vw, 18px);
}
.oeukfns-q-title {
  font-size: clamp(20px, 2.2vw, 23px);
  font-weight: 800;
  margin-bottom: clamp(8px, 1.2vw, 12px);
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
}
.oeukfns-progress {
  display: flex; justify-content: space-between; align-items: center;
  margin: 10px 0 18px 0; font-weight: 700;
  font-size: clamp(14px, 1.4vw, 18px);
}

/* ===== Answers ===== */
.oeukfns-q-answers {
  display: grid;
  gap: clamp(8px, 1.2vw, 14px);
  grid-template-columns: 1fr;
}
.oeukfns-ans {
  display: block;
  width: 100%;
  text-align: left;
}

/* ===== Leaderboard Tables ===== */
.oeukfns-table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(14px, 1.4vw, 16px);
  background: rgba(255,255,255,.08);
  border-radius: 10px;
  overflow: hidden;
}
.oeukfns-table thead {
  background: rgba(255,255,255,.2);
}
.oeukfns-table th,
.oeukfns-table td {
  padding: 10px 12px;
  text-align: left;
}
.oeukfns-table th {
  font-weight: 700;
  color: #fff;
}
.oeukfns-table tbody tr:nth-child(even) {
  background: rgba(255,255,255,.05);
}

/* ===== Leaderboard highlights ===== */
.oeukfns-gold   td { color: #FFD700; font-weight: 700; }
.oeukfns-silver td { color: #C0C0C0; font-weight: 700; }
.oeukfns-bronze td { color: #CD7F32; font-weight: 700; }

.oeukfns-note { font-size: 13px; opacity: .9; margin-top: 8px; }

/* ===== Two-column layout for dual leaderboards ===== */
.oeukfns-lb-grid {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
  grid-template-columns: repeat(2, minmax(320px, 1fr));
  align-items: start;
}

/* Stack on narrow screens */
@media (max-width: 900px) {
  .oeukfns-lb-grid {
    grid-template-columns: 1fr;
  }
  .oeukfns-table th, .oeukfns-table td {
    font-size: 14px;
    padding: 8px;
  }
}