:root {
  --page-dark-surface:
    linear-gradient(180deg, rgba(14, 18, 24, 0.88), rgba(7, 10, 14, 0.94)),
    rgba(4, 6, 9, 0.82);
  --page-dark-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  --page-dark-radius: 4px;
}

body.page-shell-dark {
  min-height: 100vh;
}

body.page-shell-dark .container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.page-shell-dark .notice {
  color: #a8c9f8;
  font-size: 0.72rem;
  font-weight: 300;
  margin-top: 4px;
}

body.page-shell-dark #main-footer {
  margin-top: auto;
}

body.page-shell-dark .surface-card {
  background: var(--page-dark-surface);
  color: #f4f6fb;
  backdrop-filter: blur(4px);
  border: 0;
  box-shadow: var(--page-dark-shadow);
  border-radius: var(--page-dark-radius);
}

body.accordion-page .faq,
body.accordion-page .howto {
  padding: 0;
  margin-top: 14px;
}

body.accordion-page .item {
  margin-top: 14px;
  padding: 20px 22px;
  background: var(--page-dark-surface);
  color: #f4f6fb;
  backdrop-filter: blur(4px);
  border: 0;
  box-shadow: var(--page-dark-shadow);
  border-radius: var(--page-dark-radius);
}

body.accordion-page .item:first-child {
  margin-top: 0;
}

body.accordion-page .q-btn {
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 0;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 300;
  line-height: 1.5;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

body.accordion-page .q-btn,
body.accordion-page .q-btn * {
  font-weight: 300;
}

body.accordion-page .q-btn:hover {
  color: #ffffff;
}

body.accordion-page .q-btn::after {
  content: "+";
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
}

body.accordion-page .item.open .q-btn::after {
  content: "-";
}

body.accordion-page .answer {
  display: none;
  color: #ffffff;
  margin-top: 14px;
  padding: 14px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.9rem;
  line-height: 1.6;
  white-space: pre-line;
}

body.accordion-page .item.open .answer {
  display: block;
}

body.workbench-page .panel {
  background: var(--page-dark-surface);
  border: 0;
  border-radius: var(--page-dark-radius);
  box-shadow: var(--page-dark-shadow);
  padding: 20px;
  margin-bottom: 14px;
  color: #f4f6fb;
  backdrop-filter: blur(4px);
}

body.workbench-page .grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

body.workbench-page .field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.88rem;
  font-weight: 400;
  color: #ffffff;
}

body.workbench-page .field input {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid #cfdced;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
}

body.workbench-page .field select {
  width: 100%;
}

body.workbench-page .field input[type="file"] {
  padding: 4px 12px;
}

body.workbench-page .field input[type="file"]::file-selector-button {
  height: 32px;
  margin: 0 10px 0 -8px;
  padding: 0 12px;
  border: 0;
  border-radius: 0;
  background: #e5e7eb;
  color: #111827;
  font: inherit;
  cursor: pointer;
}

body.workbench-page .submit-row {
  margin-top: 14px;
}

body.workbench-page .submit-row button {
  border: 0;
  padding: 10px 18px;
  border-radius: 0;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(135deg, #0455bf, #0284c7);
  cursor: pointer;
}

body.workbench-page .result-area {
  display: none;
  margin-top: 16px;
}

body.workbench-page .result-message {
  margin-bottom: 8px;
}

body.workbench-page .result-download-link {
  display: inline-block;
}

body.workbench-page .result-image {
  max-width: 100%;
  border: 1px solid #ddd;
  border-radius: 0;
  cursor: pointer;
}

body.workbench-page .download-actions {
  margin-top: 8px;
}

@media (max-width: 860px) {
  body.workbench-page .grid {
    grid-template-columns: 1fr;
  }
}