:root {
  --green: #1f9d55;
  --dark: #222831;
  --white: #ffffff;
  --light: #f4f7f5;
  --muted: #6b7280;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  color: var(--dark);
  background: var(--light);
}

.header {
  background: var(--white);
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 0.8rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.55rem; font-weight: 700; text-decoration: none; color: var(--dark); }
.brand img { width: 28px; height: 28px; }
.nav-links { display: flex; gap: .9rem; flex-wrap: wrap; }
.nav-links a { color: var(--dark); text-decoration: none; }

.container { max-width: 980px; margin: 0 auto; padding: 1rem; }
.hero {
  background: linear-gradient(120deg, #e8f7ee, #ffffff);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
}
.hero h1 { margin: 0 0 .5rem; font-size: 2rem; color: var(--green); }
.hero p { color: var(--muted); margin: 0 0 1rem; }
.btn {
  border: none;
  border-radius: 10px;
  padding: .7rem 1rem;
  text-decoration: none;
  display: inline-block;
  margin-right: .6rem;
  margin-bottom: .4rem;
  font-weight: 600;
}
.btn-primary { background: var(--green); color: var(--white); }
.btn-secondary { background: var(--dark); color: var(--white); }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; margin-top: 1rem; }
.card {
  background: var(--white);
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0,0,0,.04);
  padding: 16px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(0,0,0,.08);
}
.card-link {
  color: inherit;
  text-decoration: none;
}
.card h3 { margin: 0 0 .35rem; }
.muted { color: var(--muted); }

.list { list-style: none; margin: 0; padding: 0; }
.leaderboard-item {
  display: flex;
  align-items: center;
  gap: .7rem;
  background: var(--white);
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: .75rem .9rem;
  margin-bottom: .6rem;
}
.place { color: var(--green); min-width: 42px; font-weight: 700; }
.name { flex: 1; font-weight: 600; }
.points { color: var(--muted); }
.badge { font-size: .8rem; border-radius: 999px; padding: .2rem .6rem; background: #e8f7ee; color: var(--green); }

.section-title { margin-top: 1.4rem; margin-bottom: .6rem; }
.search-row { display: flex; gap: .5rem; margin-bottom: 1rem; }
.search-row input { flex: 1; padding: .65rem; border-radius: 10px; border: 1px solid #d1d5db; }

.skeleton {
  height: 18px;
  border-radius: 8px;
  margin-bottom: .5rem;
  background: linear-gradient(90deg, #f0f0f0, #f8f8f8, #f0f0f0);
  background-size: 300% 100%;
  animation: pulse 1.8s infinite;
}
.live-pop {
  animation: pop .25s ease;
}
@keyframes pulse {
  0% { background-position: 100% 0; }
  100% { background-position: 0 0; }
}
@keyframes pop {
  from { transform: scale(0.98); }
  to { transform: scale(1); }
}

@media (max-width: 768px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 1.2rem; }
}