/* ============================================
   Uropendel-spill - Styling og animasjoner
   ============================================ */

/* --- Reset og grunnstiler --- */
:root {
  --primary: #00509E;
  --primary-light: #00A4E4;
  --primary-dark: #003D78;
  --success: #4CAF50;
  --error: #F44336;
  --warning: #FFA100;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --text: #333333;
  --text-secondary: #666666;
  --border: #e0e0e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);
  --radius: 12px;
  --radius-sm: 8px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* --- Visuelt skjult, tilgjengelig for skjermlesere --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Skip link (NF-04 WCAG) --- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 8px 16px;
  z-index: 100;
  font-weight: 600;
  border-radius: 0 0 8px 0;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

/* --- Focus visible (NF-04 WCAG) --- */
:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}

body {
  font-family: 'Open Sans', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* --- Header --- */
.app-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 10px 24px;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
}

.app-logo {
  display: block;
  height: 52px;
  width: auto;
}

.app-title {
  color: white;
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 0 14px;
  letter-spacing: -0.5px;
}

/* --- Kontrollpanel --- */
.controls {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 8px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.control-group-right {
  margin-left: auto;
}

.controls .btn-secondary {
  min-height: 50px;
}

/* --- Vanskelighetsknapper --- */
.difficulty-buttons {
  display: flex;
  gap: 4px;
  border-radius: var(--radius-sm);
}

.difficulty-btn {
  padding: 8px 18px;
  min-height: 50px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: #f0f0f0;
  color: var(--text);
  transition: all 0.2s ease;
}

.difficulty-btn:hover {
  background: rgba(0, 80, 158, 0.1);
  color: var(--primary);
}

.difficulty-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 6px rgba(0, 80, 158, 0.3);
}

/* --- Hovedområde --- */
.main-content {
  max-width: 1400px;
  margin: 12px auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: opacity 0.2s ease, filter 0.2s ease;
}

.main-content.disabled {
  opacity: 0.4;
  pointer-events: none;
  filter: grayscale(0.5);
}

/* --- Mobilvisning --- */
.mobile-container {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px;
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.mobile-container svg {
  width: 100%;
  height: auto;
  display: block;
}

/* --- Variabel-panel --- */
.variable-panel {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 20px;
}

.variable-panel h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.variables-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}

.variable-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: #f8f9fa;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: border-color 0.3s ease;
}

.variable-item.correct {
  border-color: var(--success);
  background: #E8F5E9;
}

.variable-item.incorrect {
  border-color: var(--error);
  background: #FFEBEE;
}

.variable-shape {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.variable-shape svg {
  width: 36px;
  height: 36px;
}

.variable-equals {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.variable-input {
  width: 70px;
  padding: 8px 10px;
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 1rem; /* minst 16px for å unngå iOS Safari autozoom */
  font-weight: 600;
  text-align: center;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.variable-input::placeholder {
  color: #767676;
  opacity: 1;
}

.variable-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(0, 164, 228, 0.25);
}

.variable-input:disabled {
  background: #f0f0f0;
  color: var(--text);
  border-color: #ddd;
}

.variable-input.correct {
  border-color: var(--success);
  background: #E8F5E9;
}

.variable-input.incorrect {
  border-color: var(--error);
  background: #FFEBEE;
}

.variable-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* --- Handlingsknapper --- */
.action-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 8px 20px;
  min-height: 44px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(0, 80, 158, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(0, 80, 158, 0.4);
}

.btn-secondary {
  background: #f0f0f0;
  color: var(--text);
}

.btn-secondary:hover {
  background: #e0e0e0;
}

.btn-secondary.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 6px rgba(0, 80, 158, 0.3);
}

.btn-success {
  background: #4CAF50;
  color: white;
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.btn-success:hover {
  background: #3D8B40;
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

.btn-warning {
  background: #FF8C00;
  color: white;
  box-shadow: 0 2px 8px rgba(255, 140, 0, 0.3);
}

.btn-warning:hover {
  background: #CC7000;
  box-shadow: 0 4px 12px rgba(255, 140, 0, 0.4);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- Tilbakemeldinger --- */
.feedback-area {
  text-align: center;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feedback-message {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  animation: fadeIn 0.3s ease;
}

.feedback-success {
  background: #E8F5E9;
  color: #2E7D32;
  border: 2px solid #81C784;
}

.feedback-error {
  background: #FFEBEE;
  color: #C62828;
  border: 2px solid #EF9A9A;
}

.feedback-info {
  background: #CCECF8;
  color: #00509E;
  border: 2px solid #67C8EE;
}

/* --- Bjelke-animasjoner --- */
.bar-group.neutral {
  transform: rotate(0deg);
}

.bar-group.balanced {
  transform: rotate(0deg);
}

.bar-group.tilt-left {
  transform: rotate(-6deg);
}

.bar-group.tilt-right {
  transform: rotate(6deg);
}

/* Suksess-glow */
.bar-group.balanced .bar-line {
  filter: drop-shadow(0 0 4px rgba(76, 175, 80, 0.6));
}

/* Feil-glow */
.bar-group.tilt-left .bar-line,
.bar-group.tilt-right .bar-line {
  filter: drop-shadow(0 0 4px rgba(244, 67, 54, 0.6));
}

/* --- Shape hover (AG-04) --- */
.shape-path {
  cursor: default;
  transition: transform 0.2s ease, filter 0.2s ease;
  -webkit-transform-box: fill-box;
  transform-box: fill-box;
  transform-origin: center;
}

.shape-path:hover {
  transform: scale(1.12);
  filter: drop-shadow(0 0 6px rgba(0,0,0,0.3));
}

/* --- Swing-in animation (AG-01) --- */
@keyframes swing-in {
  0% {
    transform: rotate(-12deg);
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  40% {
    transform: rotate(8deg);
  }
  60% {
    transform: rotate(-5deg);
  }
  75% {
    transform: rotate(3deg);
  }
  90% {
    transform: rotate(-1deg);
  }
  100% {
    transform: rotate(0deg);
    opacity: 1;
  }
}

.mobile-swing-in {
  animation: swing-in 1.2s ease-out forwards;
  transform-origin: top center;
}

/* --- Staggered figure drop-in (AG-05) --- */
@keyframes figure-drop-in {
  0% {
    opacity: 0;
    transform: translateY(-20px) scale(0.5);
  }
  60% {
    transform: translateY(4px) scale(1.05);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.shape-animate-in {
  animation: figure-drop-in 0.4s ease-out both;
}

/* --- Live balance tilt transition (AG-06) --- */
.bar-group {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.bar-child-group {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- prefers-reduced-motion (NF-04 partial) --- */
@media (prefers-reduced-motion: reduce) {
  .mobile-swing-in,
  .shape-animate-in,
  .bar-group,
  .bar-child-group,
  .shape-path,
  .confetti,
  .mobile-container,
  .mobile-container.success {
    animation: none !important;
    transition: none !important;
  }
}

/* --- Suksess-animasjon --- */
@keyframes celebrate {
  0% { transform: scale(1); }
  25% { transform: scale(1.05); }
  50% { transform: scale(1); }
  75% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

.mobile-container.success {
  animation: celebrate 0.8s ease;
}

/* --- Fade-in --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-container {
  animation: slideUp 0.5s ease;
}

/* --- Loading --- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid #e0e0e0;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Responsivt design --- */
@media (max-width: 768px) {
  .app-header {
    padding: 8px 16px;
  }

  .app-logo {
    height: 44px;
  }

  .app-title {
    font-size: 22px;
  }

  .controls {
    padding: 12px 16px;
    gap: 10px;
  }

  .difficulty-btn {
    padding: 6px 14px;
    font-size: 0.9rem;
  }

  .main-content {
    padding: 0 12px;
    margin: 12px auto;
    gap: 12px;
  }

  .mobile-container {
    padding: 44px 12px 12px;
    min-height: 250px;
  }

  .mobile-container svg {
    /* Mild-oppgaver har smale, høye trær som ellers vokser langt utenfor skjermen.
       max-height begrenser SVG-høyden slik at hele urofeltet alltid er synlig uten å scrolle.
       min-height forhindrer at uroen kollapser til ubrukelig størrelse ved ekstrem zoom.
       preserveAspectRatio="xMidYMid meet" på SVG-en sørger for korrekt skalering og sentrering. */
    max-height: calc(100vh - 210px);
    max-height: calc(100svh - 210px);
    min-height: 220px;
  }

  .variable-panel {
    padding: 14px 16px;
  }

  .variables-grid {
    gap: 10px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }


}

/* --- Nettbrett (768–1024px) --- */
@media (min-width: 768px) and (max-width: 1024px) {
  .settings-panel {
    padding: 16px;
  }

  .settings-grid {
    gap: 14px 20px;
  }

  .slider {
    width: 200px;
  }
}

@media (max-width: 480px) {
  .difficulty-buttons {
    flex-wrap: wrap;
    padding: 0;
  }

  /* Kontrollknapper: 40px er romslig nok for fingre på liten skjerm */
  .controls .btn-secondary {
    min-height: 40px;
  }

  .difficulty-btn {
    min-height: 40px;
    padding: 6px 10px;
  }

  .btn {
    min-height: 40px;
  }

  .variables-grid {
    flex-direction: column;
    align-items: stretch;
  }

  .variable-item {
    justify-content: center;
  }
}

/* --- Smal skjerm: stable kontrollinje vertikalt (< 540px) --- */
@media (max-width: 540px) {
  .controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .control-group-right {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    margin-left: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 8px rgba(0,0,0,0.08);
    padding: 8px 16px;
    justify-content: center;
    z-index: 50;
  }

  .main-content {
    padding-bottom: 68px;
  }
}

/* --- Touch-enhet (mobil/nettbrett): skjul utskriftsfunksjon --- */
@media (pointer: coarse) {
  #togglePrintBtn {
    display: none;
  }
}

/* --- Grid-layout fra 660px: dekker zoomet PC (200% på 1366px = 683px CSS-bredde) --- */
@media (min-width: 660px) {
  .main-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    grid-template-rows: 1fr auto auto;
    /* max() sikrer at innholdet ikke klemmes til ingenting ved høy zoom */
    height: max(calc(100vh - 150px), 400px);
    align-items: start;
    margin-bottom: 0;
    padding-bottom: 20px;
  }

  .mobile-container {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: stretch;
    align-items: stretch;
  }

  .mobile-container svg {
    height: 100%;
    max-height: none;
  }

  .mobile-container .loading {
    align-self: center;
  }

  .variable-panel {
    grid-column: 2;
    grid-row: 1;
    align-self: start;
  }

  .feedback-area {
    grid-column: 2;
    grid-row: 2;
  }

  .action-buttons {
    grid-column: 1 / 3;
    grid-row: 3;
    justify-content: center;
    align-self: end;
    padding-bottom: 12px;
  }
}

/* --- Bred skjerm (≥ 900px): full kolonnebredde + lås scrolling --- */
@media (min-width: 900px) {
  .main-content {
    grid-template-columns: 1fr 380px;
    height: calc(100vh - 150px);
  }

  body:not(.panel-open) {
    overflow-y: hidden;
  }
}

/* --- Veldig bred skjerm (≥ 1200px): mer plass til figurpanelet --- */
@media (min-width: 1200px) {
  .main-content {
    grid-template-columns: 1fr 460px;
  }

  .variables-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

/* --- Lærerpanel (FK-01, FK-02, FK-13) --- */
.settings-panel {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.settings-panel h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.settings-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}

.settings-control {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.settings-control label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.slider {
  width: 160px;
  height: 44px;
  accent-color: var(--primary);
}

.settings-control textarea {
  width: 280px;
  padding: 8px;
  border: 2px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
  resize: vertical;
}

.settings-control textarea:focus {
  border-color: var(--primary-light);
  outline: none;
}

.settings-actions {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.set-count-input {
  width: 60px;
  padding: 6px 8px;
  min-height: 44px;
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  text-align: center;
}

.range-inputs {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.range-input {
  width: 58px;
  padding: 6px 4px;
  min-height: 44px;
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  text-align: center;
}

.settings-control label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-right: 4px;
  vertical-align: middle;
  accent-color: var(--primary);
}

.settings-control label:has(input[type="checkbox"]) {
  min-height: 44px;
  display: flex;
  align-items: center;
  cursor: pointer;
}

.settings-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
  margin-bottom: 8px;
}

/* --- Totalsum-modusknapper --- */
.sum-mode-buttons {
  display: flex;
  gap: 4px;
  background: #f0f0f0;
  border-radius: 6px;
  padding: 3px;
}

.sum-mode-btn {
  padding: 6px 12px;
  min-height: 44px;
  border: none;
  border-radius: 5px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.sum-mode-btn:hover {
  background: rgba(0, 80, 158, 0.1);
  color: var(--primary);
}

.sum-mode-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 6px rgba(0, 80, 158, 0.3);
}

/* --- Neste oppgave-knapp --- */
.btn-next {
  padding: 10px 28px;
  animation: fadeIn 0.3s ease;
  background: #00A4E4;
  box-shadow: 0 2px 8px rgba(0, 164, 228, 0.3);
}

.btn-next:hover {
  background: #0090C8;
  box-shadow: 0 4px 12px rgba(0, 164, 228, 0.4);
}

/* --- Oppgavesett-overlay (FK-14/FK-17) --- */
.task-set-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 50;
  overflow-y: auto;
  padding: 40px 20px;
}

.task-set-overlay[hidden] {
  display: none;
}

.task-set-overlay.print-only {
  visibility: hidden;
  pointer-events: none;
}

.task-set-overlay-content {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.task-set-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.task-set-header h3 {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
}

.task-set-header-actions {
  display: flex;
  gap: 8px;
}

.task-set-page {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.task-set-item {
  background: transparent;
  border-radius: var(--radius-sm);
  padding: 12px;
  border: 1px solid var(--border);
}

.task-set-item h4 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.task-set-item svg {
  width: 100%;
  height: auto;
}

.task-set-vars {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.task-set-var-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: white;
  border: 2px solid var(--border);
  border-radius: 6px;
}

.task-set-var-icon svg {
  width: 28px;
  height: 28px;
  display: block;
}

.task-set-var-eq {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.task-set-var-blank {
  display: inline-block;
  width: 48px;
  height: 28px;
  border-bottom: 2px solid var(--text);
  text-align: center;
}

.task-set-var-known {
  display: inline-block;
  width: 48px;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
}

/* --- Tegneverktøy (frihåndstegning) --- */
.draw-toolbar {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  max-width: calc(100% - 16px);
}

#drawToggleBtn {
  transform: scaleX(-1);
  border-color: var(--primary);
  color: #000;
}

.draw-tools {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}

.draw-tools[hidden] {
  display: none;
}

/* Mobil: horisontal verktøylinje, kun svart farge */
@media (max-width: 767px) {
  .draw-toolbar {
    flex-direction: row-reverse;
    align-items: center;
    top: 6px;
    right: 6px;
    gap: 3px;
  }

  .draw-tools {
    flex-direction: row;
    padding: 3px 4px;
    gap: 3px;
  }

  .draw-tool-btn {
    width: 28px;
    height: 28px;
    font-size: 1rem;
    border-radius: 5px;
  }

  .draw-color-btn {
    min-width: 28px;
    min-height: 28px;
    width: 20px;
    height: 20px;
  }

  .draw-colors {
    flex-direction: row;
  }

  .draw-colors .draw-color-btn:not(:first-child) {
    display: none;
  }

  #drawClearBtn  { order: 0; }
  #drawColors    { order: 1; }
  #drawEraserBtn { order: 2; }
}


.draw-tool-btn {
  width: 36px;
  height: 36px;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, background 0.2s;
}

.draw-tool-btn:hover {
  border-color: var(--primary-light);
  background: #E6F5FB;
}

.draw-tool-btn.active {
  border-color: var(--primary);
  background: #CCECF8;
}

.draw-colors {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.draw-color-btn {
  width: 26px;
  height: 26px;
  min-width: 36px;
  min-height: 36px;
  border: 2px solid transparent;
  border-radius: 50%;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s;
}

.draw-color-btn:hover {
  transform: scale(1.15);
}

.draw-color-btn.active {
  border-color: var(--text);
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--text);
}

.draw-canvas {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 3;
  border-radius: var(--radius);
  cursor: crosshair;
}

.draw-canvas.inactive {
  pointer-events: none;
  cursor: default;
}

/* --- Universell utforming: Kontrastmodus --- */

/* Logo — hele uroen blir hvit */
body.uu-mode .app-logo {
  filter: brightness(0) invert(1);
}

/* Figurer — alle blir mørkeblå */
body.uu-mode .shape-path {
  fill: var(--primary) !important;
}

body.uu-mode .variable-shape svg path,
body.uu-mode .variable-shape svg circle {
  fill: var(--primary) !important;
}

body.uu-mode .task-set-var-icon svg path,
body.uu-mode .task-set-var-icon svg circle {
  fill: var(--primary) !important;
}

/* Handlingsknapper — sjekk svar og vis fasit */
body.uu-mode .btn-success {
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 80, 158, 0.3);
}

body.uu-mode .btn-success:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(0, 80, 158, 0.4);
}

body.uu-mode .btn-warning {
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 80, 158, 0.3);
}

body.uu-mode .btn-warning:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(0, 80, 158, 0.4);
}

/* Sekundærknapper — mørkeblå kant og tekst */
body.uu-mode .btn-secondary:not(.active) {
  color: var(--primary);
  box-shadow: inset 0 0 0 2px var(--primary);
  background: var(--surface);
}

body.uu-mode .btn-secondary:not(.active):hover {
  background: #CCECF8;
}

/* Vanskelighetsknapper (inaktive) */
body.uu-mode .difficulty-btn:not(.active) {
  color: var(--primary);
  box-shadow: inset 0 0 0 2px var(--primary);
  background: var(--surface);
}

body.uu-mode .difficulty-btn:not(.active):hover {
  background: #CCECF8;
}


body.uu-mode .difficulty-btn {
  border-radius: var(--radius-sm);
}

/* Totalsum-knapper (inaktive) */
body.uu-mode .sum-mode-btn:not(.active) {
  color: var(--primary);
  box-shadow: inset 0 0 0 2px var(--primary);
  background: var(--surface);
}

body.uu-mode .sum-mode-btn:not(.active):hover {
  background: #CCECF8;
}

/* Neste oppgave-knapp — mørkeblå i stedet for lyseblå */
body.uu-mode .btn-next {
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 80, 158, 0.3);
}

body.uu-mode .btn-next:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(0, 80, 158, 0.4);
}

/* Tegneverktøy-knapper */
body.uu-mode .draw-tool-btn {
  border-color: var(--primary);
  color: var(--primary);
}

/* Viskelær og slett-knapp er alltid svarte (uavhengig av modus) */
#drawEraserBtn,
#drawClearBtn {
  color: #000;
}

/* Søppelbøtte så stor som mulig innenfor knappens 36×36 px */
#drawClearBtn {
  font-size: 1.5rem;
}

body.uu-mode .draw-tool-btn:hover {
  background: #CCECF8;
  border-color: var(--primary);
}

body.uu-mode .draw-tool-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Variabel-panel — synlige rammer og tydelig likhetstegn */
body.uu-mode .variable-item {
  border-color: var(--primary);
}

body.uu-mode .variable-input {
  border-color: var(--primary);
}

body.uu-mode .variable-equals {
  color: var(--primary);
}

/* Bjelker — alltid svarte, posisjonen viser balanse */
body.uu-mode .bar-line {
  stroke: #000000 !important;
}

body.uu-mode .bar-group.balanced .bar-line,
body.uu-mode .bar-group.tilt-left .bar-line,
body.uu-mode .bar-group.tilt-right .bar-line {
  filter: none !important;
}

/* Tilbakemeldinger — mørkeblå for suksess, svart for feil */
body.uu-mode .feedback-success {
  background: #CCECF8;
  color: var(--primary);
  border-color: var(--primary);
}

body.uu-mode .feedback-error {
  background: #f0f0f0;
  color: #000000;
  border-color: #000000;
}

/* Inputfelt og variabel-rammer — korrekt/feil uten fargeavhengighet */
body.uu-mode .variable-input.correct,
body.uu-mode .variable-item.correct {
  border-color: var(--primary);
  background: #CCECF8;
}

body.uu-mode .variable-input.incorrect,
body.uu-mode .variable-item.incorrect {
  border-color: #000000;
  background: #f0f0f0;
}

/* --- Print mode (FK-15) --- */
@page {
  margin: 0;
  size: A4;
}

@media print {
  .app-header,
  .controls,
  .settings-panel,
  .action-buttons,
  .feedback-area,
  .confetti-container,
  .draw-toolbar,
  .draw-canvas,
  #shareBtn, #nextPuzzleBtn,
  .btn {
    display: none !important;
  }

  /* Skjul hovedspillet når oppgavesett vises */
  .main-content.print-hidden {
    display: none !important;
  }

  body {
    background: white;
    color: black;
    padding: 0;
    margin: 0;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
    color-adjust: exact;
  }

  .main-content {
    margin: 0;
    padding: 20mm;
    max-width: 100%;
  }

  .mobile-container {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .variable-panel {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .variable-item {
    background: white;
    border: 1px solid #ccc;
  }

  .variable-hint,
  .variable-shape {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .task-set-overlay {
    position: static;
    background: none;
    padding: 0;
    overflow: visible;
  }

  .task-set-overlay-content {
    box-shadow: none;
    padding: 0;
    overflow: visible;
  }

  .task-set-page {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 10px;
    height: 297mm;
    padding: 20mm;
    padding-top: 14mm;
    box-sizing: border-box;
    page-break-after: always;
    position: relative;
  }

  .task-set-page::before {
    content: "Heng i! — Uro i balanse";
    position: absolute;
    top: 6mm;
    left: 20mm;
    font-size: 9pt;
    color: #999;
  }

  .task-set-page:last-child {
    page-break-after: auto;
  }

  .task-set-item {
    page-break-inside: avoid;
    break-inside: avoid;
    border: 1px solid #999;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 8px;
  }

  .task-set-item h4 {
    flex-shrink: 0;
  }

  .task-set-item > div:first-of-type {
    flex: 1;
    min-height: 0;
    position: relative;
  }

  .task-set-item > div:first-of-type > svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  .task-set-vars {
    flex-shrink: 0;
    border-top-color: #999;
  }

  .task-set-item svg,
  .task-set-item svg *,
  .shape-path {
    print-color-adjust: exact !important;
    -webkit-print-color-adjust: exact !important;
    color-adjust: exact !important;
    filter: none !important;
  }

  /* Fjern alle animasjoner i print — hindrer skrå figurer */
  .mobile-swing-in,
  .shape-animate-in,
  .bar-group,
  .bar-child-group {
    animation: none !important;
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }

  .task-set-overlay {
    visibility: visible !important;
  }

  .task-set-var-item {
    border-color: #999;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .task-set-var-icon svg {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .task-set-header {
    display: none !important;
  }

}

/* --- Konfetti-effekt ved suksess --- */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100;
  overflow: hidden;
}

.confetti {
  position: absolute;
  width: 10px;
  height: 10px;
  top: -10px;
  animation: confetti-fall 3s ease-in forwards;
}

@keyframes confetti-fall {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
  100% {
    opacity: 0;
    transform: translateY(100vh) rotate(720deg);
  }
}