.modules { display: grid; gap: 18px; }

.module-card {
  border: 1px solid rgba(124,140,249,0.16);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(17,26,42,0.85), rgba(17,26,42,0.65));
  padding: 16px 16px 20px;
  box-shadow: var(--card-glow);
}
.module-card__title { margin: 0 0 8px; display: flex; align-items: center; gap: 10px; }
.module-card__hint { margin: 0 0 12px; color: var(--muted); }

.va-canvas { width: 100%; max-width: 100%; height: 600px; display: block; border-radius: 12px; border: 1px solid rgba(124,140,249,0.18); background: #0e1522; }

.va-formula {
  margin-top: 10px;
  display: inline-block;
  background: rgba(15,23,36,0.85);
  border: 1px solid rgba(124,140,249,0.2);
  border-radius: 10px;
  padding: 8px 10px;
  color: var(--text);
  box-shadow: var(--card-glow);
  max-width: 100%;
  overflow: hidden;
  font-size: 14px;
}

.vector-addition { position: relative; }
.vector-subtraction { position: relative; }
.scalar-mul { position: relative; }
.dot-product { position: relative; }
.matrix-addition { position: relative; }
.matrix-subtraction { position: relative; }
.matrix-scalar { position: relative; }
.matrix-mul-falk { position: relative; }
.ls-aug { position: relative; }
.ls-3d { position: relative; }

.module-controls { display: flex; align-items: center; gap: 12px; margin: 8px 0 10px; color: var(--muted); flex-wrap: wrap; }
.module-controls .btn { 
  --btn-bg1: rgba(124,140,249,0.2);
  --btn-bg2: rgba(124,140,249,0.08);
  background: linear-gradient(180deg, var(--btn-bg1), var(--btn-bg2));
  border: 1px solid rgba(124,140,249,0.35);
  color: #e6e9f2;
  padding: 8px 14px;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: .2px;
  box-shadow: 0 6px 18px rgba(124,140,249,0.15), inset 0 1px 0 rgba(255,255,255,0.05);
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
}
.module-controls .btn i { margin-right: 8px; }
.module-controls .btn:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(124,140,249,0.25), inset 0 1px 0 rgba(255,255,255,0.06); }
.module-controls .btn:active { transform: translateY(0); }
.module-controls .btn.btn--small { font-size: 14px; padding: 7px 12px; }
.module-controls input[type="range"] { width: min(360px, 60%); }
.module-controls input[type="checkbox"]{ appearance: none; width: 16px; height: 16px; border-radius: 4px; border:1px solid rgba(124,140,249,0.45); background: rgba(17,26,42,0.6); box-shadow: inset 0 1px 0 rgba(255,255,255,0.05); position: relative; cursor: pointer; }
.module-controls input[type="checkbox"]:hover{ box-shadow: 0 0 0 3px rgba(124,140,249,0.15), inset 0 1px 0 rgba(255,255,255,0.06);} 
.module-controls input[type="checkbox"]:checked{ background: linear-gradient(180deg, rgba(124,140,249,0.55), rgba(124,140,249,0.35)); }
.module-controls input[type="checkbox"]:checked::after{ content: '\2713'; color: #0e1522; font-weight: 800; position: absolute; inset: 0; display: grid; place-items: center; font-size: 12px; }
.module-controls label{ user-select: none; }

/* MathJax v3 CHTML Ausgabe kontrollieren */
.va-formula mjx-container { font-size: 14px !important; line-height: 1.2; display: inline-block; }
/* Vektorensektion: LaTeX doppelt groß */
.vector-addition .va-formula mjx-container,
.vector-subtraction .va-formula mjx-container,
.scalar-mul .va-formula mjx-container,
.dot-product .va-formula mjx-container { font-size: 17px !important; }
.va-formula mjx-container[display="true"] { display: block; }

/* Matrix module specifics */
.matrix-addition .va-canvas { height: 520px; }

/* Linear systems augmented matrix layout */
.ls-aug__layout{ display:grid; grid-template-columns:minmax(280px,1fr) minmax(420px,1.4fr); gap:18px; align-items:start; }
.ls-aug__system mjx-container { font-size: 16px !important; }
.ls-aug__system .ls-aug__eq mjx-container { font-size: 22px !important; }
.ls-aug__system { display:block; }
.ls-aug__eq { display:block; margin: 4px 0; }
.ls-aug .va-canvas{ height: 480px; }

/* LGS 3D Widget */
.ls-3d__layout{ display:grid; grid-template-rows:auto auto; gap:12px; }
.ls-3d .va-canvas{ height: auto; }
.ls-3d__formula mjx-container{ font-size: 18px !important; }
.ls-1d .va-canvas{ height: auto; }