/* Practice block panels */

.practice-block {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  margin: var(--space-md) 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

/* "bare" variant — used on per-problem pages where the topbar already shows
   title/difficulty and the problem-statement card carries the summary, so
   repeating them inside the practice block is redundant. */
.practice-block--bare > .practice-block__header,
.practice-block--bare > .practice-block__description {
  display: none;
}
.practice-block--bare {
  margin-top: 0;
}

/* Dismissible warning shown when CodeMirror or Pyodide fail to load
   (network blocked, CDN unreachable, etc.). */
.practice-block__banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: #fff7ed;
  border-bottom: 1px solid #fdba74;
  color: #9a3412;
  font-size: 13px;
  line-height: 1.45;
}
.practice-block__banner-close {
  background: transparent;
  border: none;
  color: #9a3412;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  margin-left: auto;
  flex-shrink: 0;
}
.practice-block__banner-close:hover { opacity: 0.7; }

.practice-block__header {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.practice-block__badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
  background: var(--accent-primary);
  color: #fff;
}

.practice-block__title {
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  flex: 1;
}

.practice-block__difficulty {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
}

.practice-block__difficulty--easy {
  background: #d1fae5;
  color: #065f46;
}

.practice-block__difficulty--medium {
  background: #fef3c7;
  color: #92400e;
}

.practice-block__difficulty--hard {
  background: #fee2e2;
  color: #991b1b;
}

.practice-block__description {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  line-height: 1.6;
}

.practice-block__editor-wrap .CodeMirror {
  height: 200px;
  font-size: 13px;
  font-family: var(--font-mono);
}

.practice-block__actions {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.practice-block__run-btn {
  min-width: 110px;
}

.practice-block__status {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.practice-block__results {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-primary);
}

.practice-result {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-xs);
  padding: 4px 0;
  border-bottom: 1px solid var(--border-color-subtle, var(--border-color));
  line-height: 1.5;
}

.practice-result:last-child {
  border-bottom: none;
}

.practice-result__icon {
  font-style: normal;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 1px;
}

.practice-result--pass .practice-result__icon {
  color: #22c55e;
}

.practice-result--fail .practice-result__icon {
  color: #ef4444;
}

.practice-result__label {
  color: var(--text-secondary);
  flex: 1;
}

.practice-result__detail {
  color: var(--text-tertiary);
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-all;
}

.practice-block__summary {
  font-weight: 700;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-color);
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
}

.practice-block__summary--pass {
  color: #16a34a;
}

.practice-block__summary--partial {
  color: #d97706;
}

.practice-block__summary--fail {
  color: #dc2626;
}

.practice-problems {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* --- Running indicator (shown after click while Pyodide loads + executes) --- */
.practice-block__status--running {
  color: var(--accent-warning, #d97706);
  font-style: italic;
}
.practice-block__running {
  padding: 10px 14px;
  color: var(--text-secondary);
  font-style: italic;
  font-size: 13px;
}
.practice-block__running::before {
  content: '⏳ ';
  margin-right: 4px;
}
.practice-block__run-btn:disabled {
  opacity: 0.7;
  cursor: wait;
}

/* --- Add Test button --- */
.practice-block__add-test-btn {
  margin-left: 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.practice-block__add-test-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* --- Custom test form --- */
.practice-block__custom-form {
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.practice-custom__row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.practice-custom__row:last-child { margin-bottom: 0; }
.practice-custom__row label {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}
.practice-custom__args, .practice-custom__expected {
  flex: 1;
  padding: 5px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-primary);
  color: var(--text-primary);
}
.practice-custom__args:focus, .practice-custom__expected:focus {
  outline: none;
  border-color: var(--accent-primary);
}
.practice-custom__error {
  color: var(--accent-danger, #dc2626);
  font-size: 12px;
  margin-left: 8px;
}

/* --- Saved custom-tests list --- */
.practice-block__custom-list:not(:empty) {
  padding: 8px 14px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}
.practice-block__custom-header {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 6px;
}
.practice-custom-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  border-radius: 4px;
}
.practice-custom-item:hover { background: var(--bg-tertiary); }
.practice-custom-item__args, .practice-custom-item__expected {
  color: var(--text-primary);
}
.practice-custom-item__arrow { color: var(--text-tertiary); }
.practice-custom-item__del {
  margin-left: auto;
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}
.practice-custom-item__del:hover { color: var(--accent-danger, #dc2626); }

/* --- Collapsible results --- */
.practice-block__results-details > summary {
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  margin: 0;
  border: none;
  border-top: 1px solid var(--border-color);
}
.practice-block__results-details > summary::-webkit-details-marker { display: none; }
.practice-block__results-details > summary::after {
  content: '▸';
  margin-left: auto;
  color: var(--text-tertiary);
  transition: transform 0.18s ease;
}
.practice-block__results-details[open] > summary::after {
  transform: rotate(90deg);
}
.practice-block__summary-icon {
  font-weight: 700;
  font-size: 14px;
}
.practice-block__results-details--pass .practice-block__summary-icon { color: #16a34a; }
.practice-block__results-details--fail .practice-block__summary-icon { color: #dc2626; }
.practice-block__results-details--partial .practice-block__summary-icon { color: #d97706; }
.practice-block__summary-text { flex: 0 1 auto; }
.practice-block__summary-hint {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-tertiary);
  margin-left: 8px;
}
.practice-block__results-list {
  padding: 6px 14px 10px;
  border-top: 1px solid var(--border-color);
}

/* --- Custom test form: intro + fill-example button --- */
.practice-custom__intro {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 10px;
  padding: 8px 10px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  border-left: 3px solid var(--accent-primary);
}
.practice-custom__intro code {
  background: var(--bg-primary);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-primary);
}
.practice-custom__fill {
  margin-left: 4px;
  color: var(--text-secondary);
  border: 1px dashed var(--border-color);
}
.practice-custom__fill:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* --- Per-test expandable row --- */
.practice-result-row {
  border-bottom: 1px solid var(--border-color);
}
.practice-result-row:last-child { border-bottom: none; }
.practice-result-row__summary {
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  font-size: 13px;
  transition: background 0.12s;
}
.practice-result-row__summary::-webkit-details-marker { display: none; }
.practice-result-row__summary:hover { background: var(--bg-tertiary); }
.practice-result-row__icon {
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}
.practice-result-row--pass .practice-result-row__icon { color: #22c55e; }
.practice-result-row--fail .practice-result-row__icon { color: #ef4444; }
.practice-result-row__label {
  flex: 1;
  color: var(--text-primary);
}
.practice-result-row__chevron {
  color: var(--text-tertiary);
  font-size: 11px;
  transition: transform 0.18s ease;
}
.practice-result-row[open] > summary .practice-result-row__chevron {
  transform: rotate(90deg);
}
.practice-result-row__body {
  padding: 4px 12px 12px 32px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.practice-result-row__field {
  display: flex;
  gap: 8px;
  align-items: baseline;
  flex-wrap: wrap;
}
.practice-result-row__field-label {
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 72px;
}
.practice-result-row__field code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 3px;
  word-break: break-all;
  flex: 1;
}
.practice-got--ok { color: #166534; }
.practice-got--bad { color: #991b1b; }

/* --- Timed-out run (possible infinite loop, killed in the worker) --- */
.practice-block__timeout {
  padding: 12px 14px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  color: #9a3412;
  font-size: 13px;
  line-height: 1.5;
}

/* --- Whole-program error (syntax error / missing function) --- */
.practice-block__code-error {
  margin: 0;
  padding: 12px 14px;
  background: #fef2f2;
  border-top: 1px solid #fecaca;
  color: #991b1b;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 12.5px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}