body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 20px;
    display: flex;
    flex-direction: column;
    background-color: #f2f2f7;
    color: #333;
}

.solucion-container {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.solucion-container label {
    margin-right: 10px;
    font-weight: 500;
    font-size: 18px;
}

.solucion-container textarea {
    font-size: 18px;
    padding: 10px 14px;
    box-sizing: border-box;
    width: 50%;
    border: 1px solid #ccc;
    border-radius: 10px;
    background-color: #ffffff;
    transition: box-shadow 0.3s, border-color 0.3s;
}

.solucion-container textarea:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
    border-color: #007aff;
}

.main-content {
    display: flex;
    width: 100%;
}

.inputs-container {
    flex: 2;
    margin-right: 20px;
}

.input-box {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.input-box label {
    margin-right: 10px;
    font-weight: 500;
    font-size: 18px;
}

.input-box textarea {
    font-size: 18px;
    padding: 10px 14px;
    margin-right: 10px;
    width: 45%;
    border: 1px solid #ccc;
    border-radius: 10px;
    background-color: #ffffff;
    transition: box-shadow 0.3s, border-color 0.3s;
}

.input-box textarea:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
    border-color: #007aff;
}

select {
    margin-right: 5px;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid #ccc;
    background-color: #ffffff;
    font-size: 16px;
    cursor: pointer;
    transition: border-color 0.3s, box-shadow 0.3s;
}

select:focus {
    outline: none;
    border-color: #007aff;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.keyboard-container {
    flex: 1;
    border: 1px solid #ddd;
    padding: 20px;
    border-radius: 16px;
    background-color: #ffffff;
    box-shadow: 0 6px 12px rgba(0,0,0,0.05);
}

.keyboard-container h3 {
    margin-top: 0;
    font-size: 22px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 20px;
}

.keyboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 10px;
}

.keyboard-grid button {
    font-size: 22px;
    padding: 16px;
    cursor: pointer;
    background-color: #f2f2f7;
    border: 1px solid #ccc;
    border-radius: 12px;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.keyboard-grid button:hover {
    background-color: #e0e0e5;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.selected {
    border: 2px solid #007aff;
}

button.action-btn, button.action-btn-clc {
    font-size: 16px;
    margin: 6px 8px 6px 0;
    padding: 12px 22px;
    cursor: pointer;
    background-color: #007aff;
    color: white;
    border: none;
    border-radius: 10px;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

button.action-btn:hover, button.action-btn-clc:hover {
    background-color: #005ecb;
    box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}

#letras-container button {
    font-size: 20px;
    margin: 5px;
    padding: 12px 18px;
    cursor: pointer;
    background-color: #f2f2f7;
    border: 1px solid #ccc;
    border-radius: 10px;
    transition: background-color 0.3s, box-shadow 0.3s;
    width: 22%;
}

#letras-container button:hover {
    background-color: #e0e0e5;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.suposicion {
    padding-left: 10%;
}
.suposicion-bloque {
    position: relative;
    margin-left: 20px;
    padding-left: 10px;
}

.suposicion-bloque::before {
    content: '';
    position: absolute;
    top: 30px; /* desde el primer input-box (ajusta a gusto) */
    bottom: 10px; /* hasta el último input-box menos la CS */
    left: 0;
    border-left: 2px solid red;
    z-index: 0;
}


.input-box.suposicion-inicio::after,
.input-box.suposicion-fin::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 20px;
    border-top: 2px solid red;
    z-index: 0;
}































/* ---- Árbol genealógico ---- */
.arbol-ul {                     /* <ul> de cualquier nivel */
  padding-left: 1.5rem;
  position: relative;
}
.arbol-ul::before {             /* línea vertical entre hijos */
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0.5rem;
  border-left: 1px solid #999;
}

.arbol-node {                   /* <li> nodo individual */
  list-style: none;
  position: relative;
  margin: 0.5rem 0 0.5rem 0;    /* espacio entre nodos */
}
.arbol-node::before {           /* línea horizontal hacia padre */
  content: '';
  position: absolute;
  top: 0.9em;                   /* alinea con caja */
  left: -1.5rem;
  width: 1.5rem;
  border-bottom: 1px solid #999;
}

.node-box {                     /* cajita del nodo */
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 4px;
  border: 1px solid #777;
  border-radius: 4px;
  background: #fafafa;
}
.node-box textarea {
  width: 140px;
  min-height: 2.2em;
  resize: vertical;
}
.node-box button {
  font-size: 0.8em;
  padding: 2px 6px;
}






































/* Panel de resultados */
.errores.hidden { display:none; }
.errores { margin-top:1.5rem; text-align:center; }

.errores .ok {
  color:green;
  font-weight:bold;
  margin:0;
}

/* Tabla */
.tabla-errores {
  margin:0 auto;
  border-collapse:collapse;
  font-size:0.95em;
}
.tabla-errores th,
.tabla-errores td {
  border:1px solid #c8c8c8;
  padding:6px 10px;
}
.tabla-errores th { background:#f4f4f4; }
.tabla-errores tr:nth-child(odd) td { background:#fafafa; }