.matrix-upload[hidden],
.matrix-upload-actions [hidden] {
  display: none;
}

.matrix-picker {
  max-width: 980px;
  margin: 30px auto 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: #fff;
  text-align: left;
}

.matrix-picker label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
}

.matrix-picker select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: #fff;
  color: var(--ink);
  font: inherit;
  letter-spacing: -0.04em;
}

.matrix-picker select:focus {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.matrix-picker p,
.matrix-upload p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.matrix-picker p.error {
  color: #b00020;
}

.matrix-upload {
  max-width: 980px;
  margin: 8px auto 0;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid var(--line);
  background: var(--muted-panel);
  text-align: left;
}

.matrix-upload strong {
  color: var(--ink);
  font-size: 0.84rem;
}

.matrix-upload-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.matrix-upload-actions .btn {
  min-height: 40px;
  padding: 0 14px;
  font-size: 0.78rem;
}

.matrix-file-button {
  position: relative;
  overflow: hidden;
}

.matrix-file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

@media (max-width: 760px) {
  .matrix-upload {
    align-items: stretch;
    flex-direction: column;
  }

  .matrix-upload-actions {
    justify-content: flex-start;
  }
}