* { box-sizing: border-box; }
.oculto { display: none; }
body {
    font-family: Arial, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}
.container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 1000px;
}
h2 { text-align: center; color: #333; margin-top: 0; }
.layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 30px;
}
.panel-form { padding-right: 30px; border-right: 1px solid #e0e0e0; }
.panel-resultados { min-width: 0; }
.form-group { margin-bottom: 15px; }
label { display: block; margin-bottom: 5px; font-weight: bold; color: #555; }
input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
}
button {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}
button:hover { background-color: #0056b3; }
.result {
    margin-top: 20px;
    padding: 15px;
    background-color: #e9ecef;
    border-radius: 6px;
    font-size: 15px;
}
.highlight { font-weight: bold; color: #28a745; }
.error { color: #d9534f; font-weight: bold; }
.grafico-wrapper { margin-top: 20px; }
.grafico-wrapper svg {
    width: 100%;
    height: auto;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
}
.tabla-wrapper {
    margin-top: 15px;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #ccc;
    border-radius: 6px;
}
.tabla-wrapper table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.tabla-wrapper th, .tabla-wrapper td {
    padding: 8px;
    text-align: right;
    border-bottom: 1px solid #eee;
}
.tabla-wrapper th {
    position: sticky;
    top: 0;
    background: #007bff;
    color: white;
}
.tabla-wrapper td:first-child, .tabla-wrapper th:first-child { text-align: center; }

.grid-resumen {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}
.grid-resumen .result { margin-top: 0; text-align: center; }
.grid-resumen .highlight { font-size: 18px; }

@media (max-width: 768px) {
    .layout { grid-template-columns: 1fr; gap: 20px; }
    .panel-form { padding-right: 0; border-right: none; }
    .grid-resumen { grid-template-columns: 1fr; }
}