/* Mode fosc de la portada, aplicat sense afectar les altres pàgines. */
.theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  border: 1px solid #cbd5e1;
  border-radius: 9999px;
  padding: .5rem .8rem;
  background: #fff;
  color: #334155;
  font: 600 .875rem Inter, system-ui, sans-serif;
  cursor: pointer;
  transition: background-color .15s, color .15s, border-color .15s;
}
.theme-toggle:hover { background: #f1f5f9; }
.theme-toggle:focus-visible { outline: 3px solid #60a5fa; outline-offset: 2px; }
header.bg-white { position: relative; }

html[data-theme="dark"] { color-scheme: dark; }
html[data-theme="dark"] body { background-color: #0f172a; color: #e2e8f0; }
html[data-theme="dark"] .bg-white { background-color: #1e293b; }
html[data-theme="dark"] .bg-slate-50 { background-color: #273449; }
html[data-theme="dark"] .border-slate-200 { border-color: #475569; }
html[data-theme="dark"] .border-amber-200 { border-color: #92400e; }
html[data-theme="dark"] .bg-amber-50 { background-color: #422006; }
html[data-theme="dark"] .text-slate-900 { color: #f1f5f9; }
html[data-theme="dark"] .text-slate-800 { color: #e2e8f0; }
html[data-theme="dark"] .text-slate-700 { color: #cbd5e1; }
html[data-theme="dark"] .text-slate-600 { color: #cbd5e1; }
html[data-theme="dark"] .text-slate-500 { color: #a8b6c9; }
html[data-theme="dark"] .text-blue-600 { color: #60a5fa; }
html[data-theme="dark"] a.bg-slate-50:hover,
html[data-theme="dark"] a.bg-amber-50:hover { background-color: #334155; }
html[data-theme="dark"] .theme-toggle { border-color: #64748b; background: #334155; color: #f8fafc; }
html[data-theme="dark"] .theme-toggle:hover { background: #475569; }

@media (max-width: 640px) {
  .theme-toggle { top: .65rem; right: .65rem; padding: .45rem .65rem; }
  .theme-toggle-label { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
}

/* Taulers del professorat i de l'alumnat. */
html[data-theme="dark"] {
  --panel: #1e293b;
  --panel-soft: #273449;
  --line: #475569;
  --line-strong: #64748b;
  --ink: #f1f5f9;
  --muted: #a8b6c9;
  --blue: #60a5fa;
  --teal: #2dd4bf;
  --green: #4ade80;
  --amber: #fbbf24;
  --rose: #fda4af;
  color-scheme: dark;
}
html[data-theme="dark"] body.dashboard-body { background: #0f172a; color: var(--ink); }
html[data-theme="dark"] .session-chip,
html[data-theme="dark"] .button,
html[data-theme="dark"] .tool-item,
html[data-theme="dark"] .activity-item,
html[data-theme="dark"] .field input,
html[data-theme="dark"] .field select { background: #273449; color: var(--ink); }
html[data-theme="dark"] .collapsible-header,
html[data-theme="dark"] .results-header,
html[data-theme="dark"] .credentials-table th,
html[data-theme="dark"] .form-feedback { background: #273449; }
html[data-theme="dark"] .button:disabled,
html[data-theme="dark"] .button.disabled { background: #1e293b; color: #94a3b8; }
html[data-theme="dark"] .status.ready { background: #14532d; color: #bbf7d0; }
html[data-theme="dark"] .status.todo { background: #713f12; color: #fde68a; }
html[data-theme="dark"] .status.private { background: #164e63; color: #bae6fd; }
html[data-theme="dark"] .code-pill { background: #1e3a5f; color: #bfdbfe; }
html[data-theme="dark"] .form-feedback.ok { background: #14532d; color: #bbf7d0; }
html[data-theme="dark"] .form-feedback.warn { background: #713f12; color: #fde68a; }
html[data-theme="dark"] .form-feedback.error { background: #881337; color: #fecdd3; }
html[data-theme="dark"] .progress-bar { background: #475569; }
html[data-theme="dark"] .dashboard-body .theme-toggle { position: static; flex: 0 0 auto; }