:root{
  --bg:#f3f4f6;
  --card:#ffffff;
  --accent:#4f46e5;
  --ok:#16a34a;
  --bad:#dc2626;
}

*{ box-sizing:border-box; }

body{
  margin:0;
  font-family: system-ui, sans-serif;
  background:var(--bg);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:16px;
}

/* ===== Startscherm ===== */
.main-center{
  flex:1;
  display:flex;
  justify-content:center;
  align-items:center;
  width:100%;
}

.container{
  width:100%;
  max-width:600px;
  background:var(--card);
  border-radius:24px;
  box-shadow:0 10px 30px rgba(0,0,0,.1);
  padding:24px;
  text-align:center;
}

h1{
  font-size:clamp(28px, 8vw, 48px);
  margin:12px 0;
}

.choices{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}

.choice{
  display:flex;
  align-items:center;
  gap:20px;
  padding:20px;
  border-radius:20px;
  background:#eef2ff;
  text-decoration:none;
  color:#111827;
}

.icon{
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:clamp(48px, 10vw, 64px);
  flex:0 0 90px;
  width:90px;
  height:90px;
  white-space:nowrap;
}
/* Iconen van 2 tekens (bv. 🔀➗) kleiner, zodat ze binnen dezelfde kolom blijven */
.icon-wide{
  font-size:clamp(30px, 8vw, 40px);
}

.label{
  font-size:clamp(20px, 5vw, 28px);
  font-weight:600;
}

.sub{
  font-size:clamp(14px, 4vw, 18px);
  color:#4b5563;
}

/* Smal scherm (telefoon): icoon links in een vaste kolom, tekst links uitgelijnd */
@media (max-width: 599.98px){
  .choice > div:last-child{
    flex:1;
    min-width:0;
    text-align:left;
  }
}

@media (min-width: 600px){
  .choices{ grid-template-columns:1fr 1fr; }
  .choice{ flex-direction:column; gap:12px; text-align:center; }
}

.toggle-wrapper{
  display:flex;
  justify-content:center;
  padding-top:24px;
  margin-top:auto;
}

.mode-btn{
  background:#e5e7eb;
  border:none;
  padding:10px 22px;
  border-radius:999px;
  font-size:15px;
  cursor:pointer;
  transition:.2s;
  display:flex;
  align-items:center;
  gap:8px;
}
.mode-btn:hover{ background:#d1d5db; }

body.test-mode{ background:#e5e7eb; }

/* ===== Oefenscherm (runner) ===== */
.page-column{
  width:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
}

#app .container{
  max-width:520px;
  padding:clamp(14px, 4vw, 24px);
}

.progress{
  background:#e5e7eb;
  border-radius:10px;
  overflow:hidden;
  height:12px;
  margin-bottom:8px;
}
.bar{
  background:var(--accent);
  height:100%;
  width:0%;
  transition:width .3s;
}

#counter{
  font-size:clamp(14px, 4vw, 16px);
  margin-bottom:6px;
}

/* Som-weergave */
.operator{ display:inline-block; }
.operator-warning{
  color:var(--bad);
  display:inline-block;
  animation:pulseOp .6s ease-in-out 3;
}
@keyframes pulseOp{
  0%{transform:scale(1);}
  50%{transform:scale(1.4);}
  100%{transform:scale(1);}
}

/* Splitsing-weergave */
.number{
  background:#e0e7ff;
  border-radius:18px;
  padding:12px 20px;
  font-size:clamp(40px, 10vw, 64px);
  font-weight:700;
  display:inline-block;
}
.split-space{
  position:relative;
  height:80px;
  margin:12px 0 10px;
}
.split-space::before,
.split-space::after{
  content:"";
  position:absolute;
  bottom:0;
  width:2px;
  height:70px;
  background:#9ca3af;
}
.split-space::before{ left:50%; transform:rotate(30deg) translateX(-20px); }
.split-space::after{ left:50%; transform:rotate(-30deg) translateX(20px); }
.bottom{
  display:flex;
  justify-content:center;
  gap:clamp(40px, 12vw, 120px);
  margin-bottom:10px;
}
.bottom .number{
  font-size:clamp(32px, 8vw, 48px);
  min-width:90px;
}

/* Numpad */
.grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:clamp(8px, 2.5vw, 12px);
  margin-top:14px;
}
button{
  font-size:clamp(18px, 6vw, 24px);
  padding:clamp(12px, 4vw, 18px);
  border-radius:16px;
  border:none;
  background:#e5e7eb;
}
button.primary{ background:#c7d2fe; }
button:active{ transform:scale(.96); }

/* Feedback */
.feedback{
  min-height:64px;
  font-size:clamp(34px, 8vw, 44px);
  margin-top:14px;
}
.correct{ color:var(--ok); }
.wrong{ color:var(--bad); }
.flash-correct{ background:#bbf7d0 !important; }
.flash-wrong{ background:#fecaca !important; }

.actions{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-top:16px;
}

/* Timer boven de pagina */
.exercise-timer-wrapper{
  position:fixed;
  top:6px;
  left:50%;
  transform:translateX(-50%);
  width:100%;
  display:flex;
  justify-content:center;
  z-index:1000;
}
.exercise-timer{
  width:100%;
  max-width:520px;
  height:10px;
  background:#e5e7eb;
  border-radius:999px;
  overflow:hidden;
}
.exercise-timer-bar{
  height:100%;
  width:100%;
  background:#60a5fa;
  transition:width 0.05s linear;
}

/* Resultaatscherm animatie */
.result-enter{
  opacity:0;
  transform:translateY(10px);
  animation:resultIn .35s ease forwards;
}
@keyframes resultIn{
  to{ opacity:1; transform:translateY(0); }
}

/* ===== Pauzeknop (buiten de kaart) ===== */
.pause-btn{
  margin-top:18px;
  width:48px;
  height:48px;
  border-radius:50%;
  border:none;
  background:#e5e7eb;
  font-size:20px;
  line-height:1;
  display:flex;
  align-items:center;
  justify-content:center;
  align-self:center;
  opacity:.65;
  cursor:pointer;
}
.pause-btn:hover{ opacity:1; }
.pause-btn:active{ transform:scale(.94); }

#exerciseMount{
  position:relative;
}
.pause-overlay{
  position:absolute;
  top:0; right:0; bottom:0; left:0;
  background:var(--card);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  font-size:22px;
  color:#6b7280;
  text-align:center;
  line-height:1.6;
  border-radius:12px;
}
#answers.disabled-pad{
  pointer-events:none;
  opacity:.5;
}

@media (min-width: 900px){
  body{ justify-content:center; }
}

/* ===== Ouderscherm ===== */
.admin-container{
  max-width:640px;
  text-align:left;
}
.admin-container h1{
  text-align:center;
}
.admin-container input[type="email"],
.admin-container input[type="password"],
.admin-container input[type="number"],
.admin-container input[type="text"],
.admin-container select{
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid #d1d5db;
  font-size:16px;
}

.config-card{
  background:#f9fafb;
  border-radius:16px;
  padding:16px;
  margin-bottom:16px;
}
.config-row{
  display:flex;
  gap:12px;
  margin-bottom:10px;
}
.config-row label{
  flex:1;
  font-size:14px;
  color:#374151;
}
.config-active{
  display:block;
  margin-bottom:10px;
  font-size:14px;
}
.save-status{
  margin-left:10px;
  font-size:14px;
}

.result-row{
  border-bottom:1px solid #e5e7eb;
  padding:10px 0;
}
.result-row:last-child{
  border-bottom:none;
}


/* ===== Taaloefeningen (alfabet) ===== */
.letter-row{
  display:flex;
  justify-content:center;
  gap:clamp(10px, 3vw, 20px);
  flex-wrap:wrap;
}
.letter-item, .letter-gap{
  min-width:1.2em;
  display:inline-block;
}
.letter-gap{
  border-bottom:4px solid #6366f1;
}
.letter-question{
  font-size:clamp(20px, 5.5vw, 28px);
  margin:8px 0 0;
}

/* Alfabetrij */
.abc-row{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:8px;
  margin:12px 0;
}
.abc-cell{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:1.6em;
  padding:6px 4px;
  border-radius:10px;
  background:#e0e7ff;
  font-size:clamp(20px, 6vw, 32px);
}
.abc-gap{
  background:#fff;
  border:2px dashed #94a3b8;
  cursor:pointer;
}
.abc-active{
  border:2px solid #6366f1;
  background:#eef2ff;
}
.abc-wrong{
  border-color:var(--bad);
  color:var(--bad);
}
.abc-revealed{
  border:2px solid var(--ok);
  color:var(--ok);
}

/* Onzichtbaar invoerveld voor het (scherm)toetsenbord. Niet display:none, anders kan
   iOS het niet focussen. 16px voorkomt dat iOS bij focus inzoomt. */
#answers.letter-mode{
  display:block;
  position:relative;
  height:0;
  margin:0;
}
.letter-input{
  position:absolute;
  top:0; left:0;
  width:1px; height:1px;
  opacity:0;
  border:0; padding:0;
  font-size:16px;
  pointer-events:none;
}

/* ===== Ouderschermen: brede, responsieve indeling ===== */
.admin-container.admin-wide{
  max-width:1100px;
}
.admin-topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:8px;
}
.chip-row{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.chip{
  font-size:16px;
  padding:8px 16px;
  border-radius:999px;
  background:#e5e7eb;
}
.chip.active{
  background:#c7d2fe;
  font-weight:bold;
}
.small-btn{
  font-size:16px;
  padding:8px 16px;
  border-radius:12px;
}
.admin-container h2{
  margin:22px 0 10px;
}
.hint{
  font-size:13px;
  color:#6b7280;
  margin:4px 0 10px;
}
.config-row.wrap{
  flex-wrap:wrap;
}
.config-row.wrap label{
  min-width:150px;
}
.level-card{
  background:#eef2ff;
}

/* Kaarten in een raster: 1 kolom op telefoon, 2-3 op tablet/pc */
.config-grid, #statsContent{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(300px, 1fr));
  gap:16px;
  align-items:start;
}
.config-grid .config-card,
#statsContent .config-card{
  margin-bottom:0;
}
.config-grid > p, .config-grid > .hint{
  grid-column:1 / -1;
}
.tabs{
  margin-bottom:14px;
}

.config-card h4{
  margin:12px 0 4px;
  font-size:15px;
  color:#374151;
}

/* Leerniveau: tafels individueel aan/uit. Groepen onder elkaar; chips in een net
   raster met vaste breedte zodat ze nooit scheef afbreken. */
.learned-body{ display:flex; flex-direction:column; gap:14px; margin:12px 0 16px; }
.learned-group .chip-row{
  display:grid; grid-template-columns:repeat(auto-fill, 46px); gap:8px; margin-top:8px;
}
.learned-group .chip{ width:46px; height:40px; padding:0; text-align:center; }
.learned-group label{ display:block; }
.learned-group input.l-alphabet{ width:72px; text-align:center; }
.level-card .save-level-btn{ padding:10px 22px; font-size:16px; }