* {
  box-sizing: border-box;
}

:root {
  --color-bg-body: #f4f6fb;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-heading: #1e293b;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-surface-alt: #f8fafc;
  --color-badge-surface: #e0e7ff;
  --color-badge-text: #1e3a8a;
  --color-filename-surface: #e2e8f0;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-lab-border: #cbd5f5;
  --color-lab-active-bg: #dbeafe;
  --color-lab-active-border: #60a5fa;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-on-primary: #ffffff;
  --color-language-border: #94a3b8;
  --color-success: #16a34a;
  --color-success-dark: #15803d;
  --color-danger: #dc2626;
  --color-danger-dark: #b91c1c;
  --color-danger-surface: #fef2f2;
  --color-danger-text: #991b1b;
  --color-danger-focus-bg: #fff5f5;
  --color-danger-focus-text: #7f1d1d;
  --color-info: #0ea5e9;
  --color-info-dark: #0284c7;
  --color-warning: #f97316;
  --color-warning-dark: #ea580c;
  --color-hint: #64748b;
  --color-copy-success: #15803d;
  --color-copy-error: #dc2626;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--color-bg-body);
  color: var(--color-text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}

.header {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 30px;
  color: var(--color-text-primary);
  text-align: center;
  border: 1px solid var(--color-border);
}

.header h1 {
  margin: 0 0 12px;
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.actions {
  margin: 26px auto 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.topControls {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.languageToggle {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin-bottom: 0;
}

.instructions {
  margin-top: 18px;
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.instructions p {
  margin: 0;
}

.instructions p + p {
  margin-top: 10px;
}

.submissionInfo {
  margin: 28px auto 12px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  align-items: flex-end;
}

.fieldGroup {
  display: flex;
  flex-direction: column;
  min-width: 220px;
  max-width: 260px;
}

.fieldLabel {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 6px;
}

.textInput {
  border: 1px solid var(--color-border-strong);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 1rem;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.textInput:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.textInput--error {
  border-color: var(--color-danger);
  background: var(--color-danger-surface);
  color: var(--color-danger-text);
}

.textInput--error:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.18);
  background: var(--color-danger-focus-bg);
  color: var(--color-danger-focus-text);
}

.fieldHint {
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--color-hint);
}

.fieldHint--error {
  color: var(--color-danger);
}

.labCodeDisplay {
  align-self: stretch;
}

.labCodeBadge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1.05rem;
  background: var(--color-badge-surface);
  color: var(--color-primary-dark);
}

.filenamePreview {
  max-width: 320px;
}

.filenameBadge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--color-filename-surface);
  color: var(--color-heading);
  letter-spacing: 0.01em;
  word-break: break-all;
}

button {
  border: none;
  border-radius: 12px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background-color 0.18s ease, transform 0.18s ease;
  color: var(--color-on-primary);
  background: var(--color-primary);
}

button:hover,
button:focus-visible {
  transform: translateY(-1px);
  background: var(--color-primary-dark);
}

button:active {
  transform: translateY(0);
}

.languageButton {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: background-color 0.18s ease, color 0.18s ease,
    border-color 0.18s ease;
}

.languageButton:hover,
.languageButton:focus-visible {
  transform: none;
  background: var(--color-badge-surface);
  border-color: var(--color-language-border);
  color: var(--color-primary-dark);
}

.languageButton.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}

.languageButton.active:hover,
.languageButton.active:focus-visible {
  background: var(--color-primary-dark);
}

.languageButton:active {
  transform: none;
}

.themeToggleButton {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: background-color 0.18s ease, color 0.18s ease,
    border-color 0.18s ease;
}

.themeToggleButton:hover,
.themeToggleButton:focus-visible {
  transform: none;
  background: var(--color-badge-surface);
  border-color: var(--color-language-border);
  color: var(--color-primary-dark);
}

.themeToggleButton.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}

.themeToggleButton.is-active:hover,
.themeToggleButton.is-active:focus-visible {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.themeToggleButton:active {
  transform: none;
}

.rightButton {
  background: var(--color-success);
}

.rightButton:hover,
.rightButton:focus-visible {
  background: var(--color-success-dark);
}

.secondaryButton {
  background: var(--color-info);
}

.secondaryButton:hover,
.secondaryButton:focus-visible {
  background: var(--color-info-dark);
}

.supportButton {
  background: var(--color-warning);
}

.supportButton:hover,
.supportButton:focus-visible {
  background: var(--color-warning-dark);
}

.layout {
  display: flex;
  gap: 28px;
  margin-top: 32px;
  align-items: flex-start;
}

.sidebar {
  width: 220px;
  background: var(--color-surface);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--color-border);
}

.sidebar h2 {
  margin: 0 0 16px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-heading);
}

.labButton {
  width: 100%;
  justify-content: flex-start;
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-lab-border);
  border-radius: 10px;
  margin-bottom: 10px;
  padding: 10px 14px;
}

.labButton:hover,
.labButton:focus-visible {
  background: var(--color-badge-surface);
  color: var(--color-badge-text);
  transform: none;
}

.labButton.active {
  background: var(--color-lab-active-bg);
  border-color: var(--color-lab-active-border);
  color: var(--color-primary-dark);
}

.labDetail {
  flex: 1;
  background: var(--color-surface);
  border-radius: 16px;
  padding: 28px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.labDetail h2 {
  margin: 0;
  font-size: 1.4rem;
  color: var(--color-heading);
}

.labHint {
  margin: -4px 0 8px;
  font-size: 0.95rem;
  color: var(--color-hint);
}

.labDetail .modifyButtons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.addButton {
  background: var(--color-success);
}

.addButton:hover,
.addButton:focus-visible {
  background: var(--color-success-dark);
}

.deleteButton {
  background: var(--color-danger);
}

.deleteButton:hover,
.deleteButton:focus-visible {
  background: var(--color-danger-dark);
}

textarea {
  width: 100%;
  min-height: 110px;
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: "JetBrains Mono", "Fira Mono", monospace;
  color: var(--color-text-primary);
  background: var(--color-surface-alt);
  resize: vertical;
  line-height: 1.5;
  transition: border-color 0.2s ease, background 0.2s ease;
}

textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.task {
  background: var(--color-surface-muted);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.task span {
  align-self: flex-start;
  font-weight: 600;
  color: var(--color-badge-text);
  background: var(--color-badge-surface);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.taskDropToggles {
  margin-top: 4px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.taskDropTogglesTitle {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.taskDropToggleList {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.taskDropToggleOption {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-heading);
}

.taskDropToggleOption input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.taskDropTogglesHint {
  margin: 4px 0 0;
  font-size: 0.75rem;
  color: var(--color-hint);
}

.taskButtons {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.saveButtons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.copyOutput {
  margin-top: 24px;
  background: var(--color-surface);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--color-border);
}

.copyStatusLabel {
  margin: 0 0 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-copy-success);
}

.copyStatusLabel--error {
  color: var(--color-copy-error);
}

.copyOutput textarea {
  min-height: 140px;
}

body.theme-dark {
  --color-bg-body: #0f172a;
  --color-text-primary: #e2e8f0;
  --color-text-secondary: #cbd5f5;
  --color-heading: #f8fafc;
  --color-surface: #111827;
  --color-surface-muted: #1f2937;
  --color-surface-alt: #0f172a;
  --color-badge-surface: rgba(148, 163, 184, 0.25);
  --color-badge-text: #e0e7ff;
  --color-filename-surface: rgba(148, 163, 184, 0.25);
  --color-border: #1f2937;
  --color-border-strong: #334155;
  --color-lab-border: #334155;
  --color-lab-active-bg: rgba(59, 130, 246, 0.18);
  --color-lab-active-border: #3b82f6;
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-on-primary: #f8fafc;
  --color-language-border: #475569;
  --color-success: #22c55e;
  --color-success-dark: #16a34a;
  --color-danger: #f87171;
  --color-danger-dark: #ef4444;
  --color-danger-surface: rgba(248, 113, 113, 0.18);
  --color-danger-text: #fee2e2;
  --color-danger-focus-bg: rgba(248, 113, 113, 0.28);
  --color-danger-focus-text: #fee2e2;
  --color-info: #38bdf8;
  --color-info-dark: #0ea5e9;
  --color-warning: #fb923c;
  --color-warning-dark: #f97316;
  --color-hint: #94a3b8;
  --color-copy-success: #4ade80;
  --color-copy-error: #f87171;
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .labButton {
    justify-content: center;
  }

  .submissionInfo {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .languageToggle {
    justify-content: center;
  }

  .topControls {
    justify-content: center;
  }

  .fieldGroup {
    max-width: unset;
  }

  .filenamePreview {
    max-width: unset;
  }

  .labCodeDisplay {
    flex-direction: column;
  }
}