/* PHÒNG NỘP CODE (CODE SUBMISSION STUDIO) */
.studio-card {
  padding: 20px 24px;
}

.studio-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 10px;
  flex-wrap: wrap;
}

.arena-studio-column, .arena-board-column, .studio-card-header > div { min-width: 0; }
.studio-card-header > div:first-child { flex: 1 1 240px; }
.studio-card-header .ide-status-tag { flex: 0 0 auto; white-space: nowrap; max-width: 100%; }
.studio-card .panel-title { font-size: 18px; line-height: 1.4; margin: 0; }
.studio-card #studio-rule-summary { margin: 0 0 14px; padding: 10px 12px; font-size: 13px; line-height: 1.6; overflow-wrap: anywhere; }
.studio-card .ide-toolbar-row { flex-wrap: wrap; gap: 8px; }
.studio-card .toolbar-lang-group { flex-wrap: wrap; min-width: 0; }
.studio-card select { max-width: 100%; }
.studio-card #studio-rule-note { min-height: 66px; margin: 6px 0 12px; }
.piece-unknown { font-size: 24px; font-weight: 800; line-height: 1; }
@media (max-width: 600px) {
  .studio-card { padding: 16px; }
  .studio-card-header > div:first-child { flex-basis: 100%; }
  .studio-card .trial-boss-group { flex-wrap: wrap; min-width: 0; }
}

.ide-status-tag {
  background: #f1f5f9;
  color: var(--text-muted);
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 10px;
}

.ide-toolbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.toolbar-lang-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-label-sm {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-body);
}

.input-text-sm {
  padding: 5px 10px;
  font-size: 12.5px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  background: #ffffff;
  outline: none;
  font-family: inherit;
}

.toolbar-btn-group {
  display: flex;
  gap: 6px;
}

.studio-code-editor {
  width: 100%;
  height: 240px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.5;
  background: #0f172a;
  color: #f8fafc;
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 14px;
  outline: none;
  resize: vertical;
  margin-bottom: 14px;
}

.studio-bottom-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.trial-boss-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 220px;
}

.trial-boss-group .input-text-sm {
  max-width: 140px;
  font-size: 12px;
  padding: 6px 8px;
}

#btn-studio-test-practice {
  font-size: 12px;
  padding: 6px 10px;
  white-space: nowrap;
}

.btn-submit-code {
  padding: 7px 14px;
  font-size: 12.5px;
  font-weight: 700;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  border-radius: 8px;
}

.match-submissions-subpanel {
  border-top: 1px solid var(--border-divider);
  padding-top: 14px;
}

.subpanel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.subpanel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-heading);
}