/* Arena page */

.arena-page {
  background: #f6f8fb;
}

.arena-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 36px 1.5rem 58px;
}

.arena-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  padding-bottom: 24px;
}

.arena-hero h1 {
  margin: 0;
  color: #0f172a;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
}

.arena-hero p {
  max-width: 760px;
  margin: 12px 0 0;
  color: #64748b;
  line-height: 1.7;
}

.arena-card {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.arena-select-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 18px;
  align-items: end;
  padding: 18px;
  margin-bottom: 18px;
}

.arena-picker label {
  display: block;
  margin-bottom: 7px;
  color: #475569;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.arena-vs {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #eef2ff;
  color: #3730a3;
  font-weight: 800;
}

.arena-loading {
  display: none;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 12px 14px;
  color: #64748b;
}

.arena-loading.is-active {
  display: flex;
}

.arena-loading .bi-arrow-repeat {
  animation: traj-spin 0.9s linear infinite;
}

.arena-matrix-card {
  padding: 18px;
  margin-bottom: 18px;
}

.arena-section-title {
  margin: 0 0 12px;
  color: #0f172a;
  font-size: 1rem;
  font-weight: 800;
}

.arena-matrix {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}

.arena-matrix-cell {
  min-height: 82px;
  padding: 10px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #f8fafc;
  color: #334155;
  text-align: left;
}

button.arena-matrix-cell {
  cursor: pointer;
}

.arena-matrix-cell:hover,
.arena-matrix-cell.is-active {
  border-color: #93c5fd;
  background: #eff6ff;
}

.arena-cell-count {
  display: block;
  color: #0f172a;
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1;
}

.arena-cell-label {
  display: block;
  margin-top: 8px;
  color: #64748b;
  font-size: 0.82rem;
  font-weight: 700;
}

.arena-task-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.36fr) minmax(0, 0.64fr);
  gap: 18px;
  align-items: start;
}

.arena-task-card {
  overflow: hidden;
}

.arena-task-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid #e2e8f0;
  background: #fbfdff;
}

.arena-task-header h2 {
  margin: 0;
  color: #0f172a;
  font-size: 1rem;
  font-weight: 800;
}

.arena-task-count {
  color: #64748b;
  font-size: 0.82rem;
  font-weight: 700;
}

.arena-task-list {
  max-height: 640px;
  overflow-y: auto;
}

.arena-task-row {
  width: 100%;
  padding: 12px 14px;
  border: 0;
  border-bottom: 1px solid #eef2f7;
  background: #ffffff;
  text-align: left;
}

.arena-task-row:hover,
.arena-task-row.is-active {
  background: #f8fafc;
}

.arena-task-name {
  display: block;
  color: #0f172a;
  font-size: 0.9rem;
  font-weight: 700;
}

.arena-task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.arena-mini-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.74rem;
  font-weight: 800;
}

.arena-mini-pass {
  background: #dcfce7;
  color: #166534;
}

.arena-mini-fail {
  background: #fee2e2;
  color: #991b1b;
}

.arena-mini-unknown {
  background: #f1f5f9;
  color: #475569;
}

.arena-mini-steps {
  background: #eef2ff;
  color: #3730a3;
}

.arena-comparison {
  overflow: hidden;
}

.arena-comparison-head {
  padding: 14px 16px;
  border-bottom: 1px solid #e2e8f0;
  background: #fbfdff;
}

.arena-comparison-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.arena-comparison-head h2 {
  margin: 0;
  color: #0f172a;
  font-size: 1rem;
  font-weight: 800;
}

.arena-expand-all {
  min-height: 28px;
}

.arena-goal {
  margin-top: 10px;
  color: #64748b;
  font-size: 0.9rem;
  line-height: 1.6;
}

.arena-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.arena-col {
  min-width: 0;
  border-right: 1px solid #e2e8f0;
}

.arena-col:last-child {
  border-right: 0;
}

.arena-col-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid #e2e8f0;
  background: #ffffff;
}

.arena-col-name {
  display: block;
  min-width: 0;
  overflow: hidden;
  color: #0f172a;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.arena-attempt-label {
  display: block;
  margin-top: 3px;
  color: #64748b;
  font-size: 0.74rem;
  font-weight: 700;
}

.arena-col-body {
  max-height: 720px;
  overflow-y: auto;
  padding: 14px;
}

.arena-empty {
  padding: 24px;
  color: #64748b;
  text-align: center;
}

@media (max-width: 1040px) {
  .arena-task-layout,
  .arena-columns,
  .arena-select-card,
  .arena-hero {
    grid-template-columns: 1fr;
  }

  .arena-vs {
    width: auto;
    height: auto;
    border-radius: 8px;
    padding: 6px 10px;
  }

  .arena-col {
    border-right: 0;
    border-bottom: 1px solid #e2e8f0;
  }

  .arena-col:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 768px) {
  .arena-shell {
    padding: 24px 1rem 42px;
  }

  .arena-matrix {
    grid-template-columns: 1fr 1fr;
  }
}