/* MCT Photoconductor Webinar — student worksheet (extends site theme) */

.mct-worksheet-page {
  --ws-border: rgba(17, 24, 39, 0.12);
  --ws-card: #ffffff;
  --ws-heading: #5b21b6;
  --ws-form-bg: rgba(255, 255, 255, 0.92);
}

.mct-worksheet-page main {
  padding-bottom: 48px;
}

/* Toolbar */
.worksheet-toolbar {
  position: sticky;
  top: 72px;
  z-index: 40;
  margin: -8px 0 24px;
  padding: 14px 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 245, 255, 0.98));
  border: 1px solid var(--ws-border);
  border-radius: 14px;
  box-shadow: 0 8px 28px rgba(17, 24, 39, 0.06);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.worksheet-toolbar .toolbar-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  width: 100%;
  margin: 0;
}

@media (min-width: 720px) {
  .worksheet-toolbar .toolbar-label {
    width: auto;
    margin-right: 8px;
  }
}

.worksheet-toolbar button {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--ws-border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.worksheet-toolbar button:hover {
  border-color: rgba(124, 58, 237, 0.45);
  background: rgba(124, 58, 237, 0.06);
  color: var(--purple-800);
}

.worksheet-toolbar button.primary {
  background: linear-gradient(135deg, var(--purple-800), var(--purple-600));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(91, 33, 182, 0.25);
}

.worksheet-toolbar button.primary:hover {
  filter: brightness(1.05);
  color: #fff;
}

.worksheet-save-hint {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  width: 100%;
}

@media (min-width: 720px) {
  .worksheet-save-hint {
    width: auto;
    margin-left: auto;
  }
}

/* TOC */
.worksheet-toc {
  margin: 0 0 28px;
  padding: 20px 22px;
  background: var(--surface-2);
  border: 1px solid var(--ws-border);
  border-radius: 14px;
  border-left: 4px solid var(--purple-600);
}

.worksheet-toc h2 {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ws-heading);
}

.worksheet-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px 20px;
}

@media (min-width: 640px) {
  .worksheet-toc ol {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .worksheet-toc ol {
    grid-template-columns: repeat(3, 1fr);
  }
}

.worksheet-toc a {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.worksheet-toc a:hover {
  color: var(--purple-600);
  border-bottom-color: rgba(124, 58, 237, 0.35);
}

/* Worksheet shell */
.worksheet-shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 4px;
}

.worksheet-header-card {
  margin-bottom: 28px;
  padding: 28px 26px 26px;
  background: var(--ws-card);
  border: 1px solid var(--ws-border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--purple-600);
}

.worksheet-kicker {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--purple-800);
}

.worksheet-title {
  margin: 0 0 6px;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.2;
}

.worksheet-subtitle {
  margin: 0 0 22px;
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.5;
  max-width: 62ch;
}

.worksheet-meta-row {
  display: grid;
  gap: 16px;
  margin-bottom: 22px;
}

@media (min-width: 540px) {
  .worksheet-meta-row {
    grid-template-columns: 1fr 1fr;
  }
}

.worksheet-instructions {
  margin: 0;
  padding: 16px 18px;
  background: rgba(124, 58, 237, 0.06);
  border: 1px solid rgba(124, 58, 237, 0.18);
  border-radius: 12px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.65;
}

.worksheet-instructions ul {
  margin: 10px 0 0;
  padding-left: 1.25em;
}

.worksheet-instructions li {
  margin: 6px 0;
}

/* Sections */
.worksheet-section {
  margin-bottom: 28px;
  padding: 24px 22px 26px;
  background: var(--ws-card);
  border: 1px solid var(--ws-border);
  border-radius: 14px;
  box-shadow: 0 4px 18px rgba(17, 24, 39, 0.04);
  scroll-margin-top: 100px;
}

.worksheet-section h2 {
  margin: 0 0 6px;
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--ws-heading);
  letter-spacing: -0.01em;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(124, 58, 237, 0.2);
}

.worksheet-section:last-of-type {
  margin-bottom: 8px;
}

.worksheet-goal {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.worksheet-section p.prompt,
.worksheet-section .block-label {
  margin: 18px 0 10px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.55;
}

.worksheet-section p.prompt:first-of-type {
  margin-top: 0;
}

.formula {
  margin: 12px 0 18px;
  padding: 14px 18px;
  background: var(--surface-2);
  border: 1px solid var(--ws-border);
  border-radius: 10px;
  font-size: 15px;
  line-height: 1.6;
  font-style: normal;
}

.formula em {
  font-style: italic;
}

/* Lists inside sections */
.worksheet-list {
  margin: 12px 0 18px;
  padding-left: 1.35em;
  color: var(--muted);
  line-height: 1.65;
}

.worksheet-list li {
  margin: 8px 0;
}

.worksheet-list strong {
  color: var(--text);
}

/* Form controls */
.worksheet-form label.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.worksheet-form input[type="text"],
.worksheet-form textarea {
  width: 100%;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.45;
  border: 1px solid var(--ws-border);
  border-radius: 10px;
  background: var(--ws-form-bg);
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.worksheet-form input[type="text"]:focus,
.worksheet-form textarea:focus {
  outline: none;
  border-color: rgba(124, 58, 237, 0.55);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.worksheet-form textarea {
  resize: vertical;
  min-height: 100px;
}

.worksheet-form textarea.textarea-short {
  min-height: 88px;
}

.worksheet-form textarea.textarea-tall {
  min-height: 120px;
}

/* Tables */
.table-wrap {
  margin: 14px 0 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--ws-border);
  border-radius: 12px;
  background: var(--surface);
}

.worksheet-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.worksheet-table th,
.worksheet-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--ws-border);
}

.worksheet-table thead th {
  background: rgba(124, 58, 237, 0.08);
  color: var(--purple-900);
  font-weight: 700;
  font-size: 13px;
  line-height: 1.35;
}

.worksheet-table tbody tr:last-child td {
  border-bottom: none;
}

.worksheet-table td input[type="text"] {
  margin: 0;
  min-width: 0;
}

.worksheet-table .row-label {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  background: rgba(17, 24, 39, 0.02);
}

/* Fieldsets */
.worksheet-fieldset {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px solid var(--ws-border);
  border-radius: 12px;
  background: rgba(17, 24, 39, 0.02);
}

.worksheet-fieldset legend {
  padding: 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ws-heading);
}

.radio-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: 10px;
}

.radio-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
}

.radio-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--purple-600);
}

.subhead {
  margin: 20px 0 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

/* Simulator link */
.worksheet-sim-link {
  margin-top: 20px;
  font-size: 15px;
}

.worksheet-sim-link a {
  color: var(--purple-600);
  font-weight: 600;
  text-decoration: none;
}

.worksheet-sim-link a:hover {
  text-decoration: underline;
}

/* Print */
@media print {
  html {
    scroll-behavior: auto;
  }

  body {
    background: #fff !important;
  }

  body.mct-worksheet-page {
    background: #fff !important;
  }

  header,
  footer,
  .worksheet-toolbar,
  .worksheet-toc,
  .skip-link {
    display: none !important;
  }

  .mct-worksheet-page main {
    padding: 0 !important;
  }

  .worksheet-shell {
    max-width: none;
    padding: 0;
  }

  .worksheet-header-card,
  .worksheet-section {
    box-shadow: none !important;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .worksheet-section h2 {
    break-after: avoid;
    page-break-after: avoid;
    color: #1a1a1a !important;
    border-bottom-color: #ccc !important;
  }

  .worksheet-title {
    color: #000 !important;
  }

  .table-wrap {
    break-inside: auto;
  }

  .worksheet-table {
    break-inside: auto;
  }

  .worksheet-table thead {
    display: table-header-group;
  }

  .worksheet-form input[type="text"],
  .worksheet-form textarea {
    border: 1px solid #999 !important;
    background: #fff !important;
    box-shadow: none !important;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .formula,
  .worksheet-instructions,
  .worksheet-fieldset {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
}