:root{
  --ok:#22c55e;
  --err:#ef4444;
  --ink:#111827;
  --muted:#6b7280;
  --bg:linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --card:linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 100%);
  --ring:#d1d5db;
  --accent:#3b82f6;
  --accent-light:#dbeafe;
  --shadow:0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-lg:0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --glow:0 0 20px rgba(34, 197, 94, 0.3);
}
*{box-sizing:border-box}
html,body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
  min-height:100vh;
  line-height:1.6;
}
.wrap{
  max-width:900px;
  margin:24px auto;
  padding:20px;
  background:rgba(255,255,255,0.95);
  border-radius:20px;
  box-shadow:var(--shadow-lg);
  backdrop-filter:blur(10px);
}
.topbar{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:24px;
  padding:16px;
  background:linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  border-radius:16px;
  box-shadow:var(--shadow);
}
.topbar h1{
  font-size:1.75rem;
  margin:0;
  font-weight:700;
  background:linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  text-align:center;
}
.hud{
  display:flex;
  gap:20px;
  flex-wrap:wrap;
  color:var(--muted);
  font-weight:500;
  justify-content:center;
}
.sentence{
  background:linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 100%) !important;
  border:2px solid var(--ring);
  border-radius:20px;
  padding:24px;
  min-height:120px;
  display:flex;
  flex-wrap:wrap;
  gap:12px 10px;
  align-items:center;
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.sentence::before{
  content:'';
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg, var(--accent) 0%, #8b5cf6 50%, var(--accent) 100%);
  background-size:200% 100%;
  animation:shimmer 3s ease-in-out infinite;
}
@keyframes shimmer{
  0%,100%{background-position:200% 0}
  50%{background-position:-200% 0}
}
.token{
  padding:10px 14px;
  border:2px solid var(--accent);
  border-radius:16px;
  user-select:none;
  cursor:pointer;
  font-size:1.1rem;
  font-weight:600;
  letter-spacing:0.025em;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position:relative;
  overflow:hidden;
  background:linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 100%) !important;
  color:#000000 !important;
  box-shadow:0 2px 8px rgba(0,0,0,0.1);
}
.token:hover:not([aria-disabled="true"]):not(.punct){
  transform:translateY(-2px) scale(1.02);
  box-shadow:0 8px 25px rgba(0,0,0,0.15);
  border-color:var(--accent);
  background:linear-gradient(145deg, #e0f2fe 0%, #bae6fd 100%) !important;
}
.token:active:not([aria-disabled="true"]):not(.punct){
  transform:translateY(0) scale(0.98);
}
.token[aria-disabled="true"]{
  opacity:.6;
  cursor:not-allowed;
  transform:none !important;
}
.token.punct{
  opacity:.4;
  cursor:default;
  border-style:dashed;
  font-size:1.2rem;
  padding:8px 12px;
  background:transparent;
  color:var(--muted);
  border-color:var(--ring);
}
.token.correct{
  background:linear-gradient(145deg, #dcfce7 0%, #bbf7d0 100%);
  border-color:var(--ok);
  color:#166534;
  box-shadow:var(--glow), 0 4px 15px rgba(34, 197, 94, 0.2);
  animation:pulse-correct 0.6s ease-out;
}
.token.wrong{
  background:linear-gradient(145deg, #fed7aa 0%, #fdba74 100%);
  border-color:#ea580c;
  color:#9a3412;
  animation:shake 0.4s ease-in-out, pulse-wrong 0.6s ease-out;
  box-shadow:0 0 20px rgba(234, 88, 12, 0.3);
}
@keyframes shake{
  0%,100%{transform:translateX(0) rotate(0deg)}
  10%{transform:translateX(-5px) rotate(-1deg)}
  20%{transform:translateX(5px) rotate(1deg)}
  30%{transform:translateX(-4px) rotate(-1deg)}
  40%{transform:translateX(4px) rotate(1deg)}
  50%{transform:translateX(-3px) rotate(-0.5deg)}
  60%{transform:translateX(3px) rotate(0.5deg)}
  70%{transform:translateX(-2px) rotate(-0.5deg)}
  80%{transform:translateX(2px) rotate(0.5deg)}
  90%{transform:translateX(-1px) rotate(0deg)}
}
@keyframes pulse-correct{
  0%{transform:scale(1)}
  50%{transform:scale(1.1)}
  100%{transform:scale(1)}
}
@keyframes pulse-wrong{
  0%{transform:scale(1)}
  25%{transform:scale(0.95)}
  50%{transform:scale(1.05)}
  75%{transform:scale(0.98)}
  100%{transform:scale(1)}
}
.controls{
  display:flex;
  gap:16px;
  margin-top:24px;
  justify-content:center;
}
.btn{
  padding:14px 24px;
  border:2px solid var(--accent);
  background:linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  border-radius:16px;
  cursor:pointer;
  font-weight:600;
  font-size:1rem;
  letter-spacing:0.025em;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.btn:hover:not(:disabled){
  transform:translateY(-2px);
  box-shadow:var(--shadow-lg);
  background:linear-gradient(145deg, var(--accent-light) 0%, #ffffff 100%);
  border-color:var(--accent);
}
.btn:active:not(:disabled){
  transform:translateY(0);
}
.btn:disabled{
  opacity:.5;
  cursor:not-allowed;
  transform:none !important;
}
.btn-secondary{
  background:linear-gradient(145deg, #f1f5f9 0%, #e2e8f0 100%);
  border-color:var(--muted);
  color:var(--muted);
}
.btn-secondary:hover:not(:disabled){
  background:linear-gradient(145deg, #e2e8f0 0%, #cbd5e1 100%);
  border-color:var(--ink);
  color:var(--ink);
}
.note{
  margin-top:24px;
  padding:16px;
  background:linear-gradient(145deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius:16px;
  color:var(--muted);
  border:1px solid var(--ring);
  box-shadow:var(--shadow);
}
.note summary{
  font-weight:600;
  cursor:pointer;
  color:var(--ink);
}
.note summary:hover{
  color:var(--accent);
}

/* Responsive design og mobile optimalisering */
@media (max-width: 768px) {
  .wrap {
    margin: 12px;
    padding: 16px;
    border-radius: 16px;
  }
  
  .topbar h1 {
    font-size: 1.5rem;
  }
  
  .hud {
    gap: 12px;
    font-size: 0.9rem;
  }
  
  .sentence {
    padding: 20px;
    min-height: 100px;
    gap: 10px 8px;
  }
  
  .token {
    padding: 8px 12px;
    font-size: 1rem;
    min-height: 44px; /* Touch target size */
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .controls {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
    padding: 16px 24px;
  }
}

@media (max-width: 480px) {
  .wrap {
    margin: 8px;
    padding: 12px;
  }
  
  .topbar {
    padding: 12px;
  }
  
  .topbar h1 {
    font-size: 1.25rem;
  }
  
  .sentence {
    padding: 16px;
    gap: 8px 6px;
  }
  
  .token {
    padding: 6px 10px;
    font-size: 0.9rem;
    min-height: 40px;
  }
  
  .hud {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* Focus states for accessibility */
.token:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* Loading animation */
@keyframes loading {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading {
  animation: loading 1s linear infinite;
}

/* Progress indicator */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--ring);
  border-radius: 3px;
  overflow: hidden;
  margin: 16px 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, #8b5cf6 100%);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Sentences container styling */
.sentences-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

/* Completed sentence styling */
.sentence.completed {
  opacity: 0.7;
  transform: scale(0.98);
  transition: all 0.3s ease;
}

.sentence.completed .token {
  pointer-events: none;
}

.sentence.completed .token.correct {
  background: linear-gradient(145deg, #dcfce7 0%, #bbf7d0 100%);
  border-color: var(--ok);
  color: #166534;
}

.sentence.completed .token:not(.correct):not(.punct) {
  background: linear-gradient(145deg, #f3f4f6 0%, #e5e7eb 100%);
  border-color: #d1d5db;
  color: #6b7280;
}

.sentence.completed .token.wrong {
  background: linear-gradient(145deg, #fed7aa 0%, #fdba74 100%);
  border-color: #ea580c;
  color: #9a3412;
}

/* Ensure active (non-completed) sentences have proper styling */
.sentence:not(.completed) .token:not(.punct) {
  background: linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 100%) !important;
  color: #000000 !important;
  border-color: var(--accent) !important;
}