* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Open Sans", sans-serif;
}

html,
body {
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(20, 120, 90, 0.16), transparent 38%),
    linear-gradient(180deg, #06080b 0%, #090d12 100%);
  color: #f8fbff;
}

body {
  padding: 20px;
}

.board-page {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.board-hero {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 22px 24px;
  border-radius: 28px;
  background: rgba(10, 16, 18, 0.92);
  border: 1px solid rgba(150, 210, 190, 0.24);
  box-shadow: 0 22px 42px rgba(0, 0, 0, 0.36);
}

.board-logo img {
  display: block;
  width: clamp(132px, 18vw, 188px);
  height: auto;
}

.board-copy {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.board-kicker {
  color: #92e6af;
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.board-copy h1 {
  font-size: clamp(1.9rem, 4.2vw, 3.2rem);
  line-height: 1.05;
  color: #ffffff;
}

.board-copy p {
  color: #d5e6f1;
  line-height: 1.5;
}

.board-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 180px;
}

.selectionButton {
  transition: all 0.16s ease;
  width: 100%;
  padding: 12px 16px;
  border: 1px solid rgba(233, 255, 242, 0.76);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.18);
  color: #f6fff8;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.selectionButton:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 230, 150, 0.92);
  color: #fff7d8;
}

.selectionButton.is-active {
  background: linear-gradient(135deg, #ffffff 0%, #f3f6fa 100%);
  color: #091015;
  border-color: #ffffff;
}

.board-card {
  border-radius: 28px;
  background: rgba(7, 11, 16, 0.9);
  border: 1px solid rgba(184, 209, 233, 0.14);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.28);
  overflow: hidden;
}

.board-table-wrapper {
  max-height: calc(100vh - 260px);
  overflow: auto;
}

.board-table {
  width: 100%;
  border-collapse: collapse;
}

.board-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: rgba(240, 247, 255, 0.96);
  color: #091015;
  padding: 16px 18px;
  font-size: 1rem;
  text-align: center;
}

.board-table tbody td {
  padding: 14px 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.leaderboard-row:nth-child(odd) td {
  background: rgba(255, 255, 255, 0.03);
}

.rankRow,
.scoreRow {
  width: 18%;
  text-align: center;
  white-space: nowrap;
}

.nicknameRow {
  width: 64%;
  text-align: left;
  color: #f5fbff;
}

.leaderboard-empty td {
  padding: 48px 18px;
  text-align: center;
  color: rgba(216, 236, 255, 0.72);
}

@media (max-width: 960px) {
  body {
    padding: 14px;
  }

  .board-hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .board-logo {
    display: flex;
    justify-content: center;
  }

  .board-actions {
    flex-direction: row;
    min-width: 0;
    flex-wrap: wrap;
    justify-content: center;
  }

  .selectionButton {
    width: auto;
    min-width: 148px;
  }

  .board-table-wrapper {
    max-height: none;
  }
}

@media (max-width: 640px) {
  .board-hero {
    padding: 18px 16px;
    border-radius: 22px;
  }

  .board-card {
    border-radius: 22px;
  }

  .board-table thead th,
  .board-table tbody td {
    padding: 12px 10px;
    font-size: 0.92rem;
  }

  .selectionButton {
    min-width: 0;
    flex: 1 1 32%;
  }

  .rankRow,
  .scoreRow {
    width: 22%;
  }

  .nicknameRow {
    width: 56%;
  }
}