/* ---------- Basis kleuren ---------- */
:root {
  --bg: #f9fafb;
  --text: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #4f46e5;   /* indigo-600 */
  --accent2: #06b6d4;  /* cyan-500 */
}

/* ---------- Layout ---------- */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.container {
  max-width: 980px;
  margin: 40px auto;
  padding: 0 20px;
}
h1 {
  margin: 0 0 12px 0;
  font-size: clamp(26px, 3vw, 36px);
}
p { margin: 0 0 12px 0; color: var(--muted); }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  margin-top: 16px;
  box-shadow: 0 6px 18px rgba(0,0,0,.05);
}

/* ---------- Progress ---------- */
.progress {
  height: 12px;
  background: #eef2ff;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin: 12px 0 24px;
}
.progress > div {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .25s ease;
}

/* ---------- Vragen ---------- */
.q {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  margin: 12px 0;
  background: #fff;
}
.q-title {
  font-weight: 600;
  margin-bottom: 8px;
}
.likert {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: #fff;
  flex: 1 1 auto;
}
.chip input {
  accent-color: var(--accent);
}

/* ---------- Knoppen ---------- */
.actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  font-weight: 500;
}
.btn.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border: none;
  color: #fff;
}
.btn:disabled {
  opacity: .55;
  cursor: not-allowed;
}

/* ---------- Meldingen ---------- */
.msg-error {
  border: 1px solid #fecaca;
  background: #fff1f2;
  color: #991b1b;
  padding: 10px 12px;
  border-radius: 10px;
}
.msg-error ul {
  margin: 0;
  padding-left: 18px;
}

/* ---------- Dark mode ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --card: #111827;
    --border: #1f2937;
  }
  body {
    background:
      radial-gradient(1200px 800px at 20% -10%, rgba(34,211,238,.15), transparent 60%),
      radial-gradient(900px 600px at 120% 30%, rgba(99,102,241,.18), transparent 60%),
      var(--bg);
  }
  .card, .q, .chip {
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02));
  }
  .progress { background: #0b1220; }
  .chip { border-color: #334155; }
  select, input[type="number"] {
    background: #0b1220;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
  }
  .btn {
    background: linear-gradient(180deg, #1f2937, #111827);
    color: #fff;
  }
  .btn.primary {
    background: linear-gradient(90deg, #6366f1, #22d3ee);
  }
  .msg-error {
    border-color: #7f1d1d;
    background: #450a0a;
    color: #fecaca;
  }
}

/* ---------- Responsive tweaks ---------- */
@media (max-width: 700px) {
  .likert {
    flex-direction: column;
    gap: 6px;
  }
  .chip {
    width: 100%;
    justify-content: flex-start;
  }
  .actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
    text-align: center;
  }
}

.q.collapsible { border-left: 4px solid var(--accent); transition: all .3s ease; }
.q-header { display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
.q-body { margin-top: 10px; }
.q.collapsed .q-body { display: none; }
.q-chosen { font-size: 0.9rem; color: var(--muted); }
.toggle-btn { background:none; border:none; cursor:pointer; font-size:1rem; }