.student-open-layout {
  max-width: 980px;
  margin: 0 auto;
}

.open-shell {
  display: grid;
  gap: 1rem;
}

.open-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.open-meta-card {
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 0.75rem;
  display: grid;
  gap: 0.2rem;
}

.open-meta-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-weight: 700;
}

.open-meta-value {
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 700;
}

.open-question {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
  padding: 1rem;
  display: grid;
  gap: 0.55rem;
}

.open-question-text {
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 700;
}

.open-editor {
  display: grid;
  gap: 0.7rem;
}

.open-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.open-upload {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.open-char-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.open-preview {
  border: 1px dashed var(--color-border-muted);
  border-radius: 10px;
  background: var(--color-surface-soft);
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.open-actions {
  display: flex;
  justify-content: flex-end;
}

.open-sending {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

@media (max-width: 780px) {
  .open-meta-grid {
    grid-template-columns: 1fr;
  }

  .open-actions .bp-btn {
    width: 100%;
  }
}