/* styles.css - Replicando fielmente el estilo solicitado */
:root {
    --bg: #ecf0f1;
    --text: #2c3e50;
    --accent-blue: #3498db;
    --accent-green: #27ae60;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 1rem;
}

.contenedor {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: linear-gradient(135deg, #27ae60, #3498db);
    color: white;
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.titulo-principal {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitulo {
    font-size: 1.4rem;
    opacity: 0.95;
}

.frase-motivacional {
    font-style: italic;
    font-size: 1.1rem;
    margin-top: 1.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.seccion {
    margin-bottom: 3rem;
}

.bloque {
    background: white;
    border-left: 5px solid var(--accent-blue);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.titulo-seccion {
    font-size: 1.8rem;
    color: var(--accent-green);
    margin-bottom: 1.5rem;
    text-align: center;
}

.lista-variables {
    list-style: none;
}

.lista-variables li {
    padding: 12px 0;
    border-bottom: 1px solid #eee;
    font-size: 1.05rem;
}

.lista-variables li strong {
    color: var(--accent-blue);
}

.tabla-estadisticas {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.tabla-estadisticas th,
.tabla-estadisticas td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}

.tabla-estadisticas th {
    background: #f8f9fa;
    color: var(--accent-blue);
    font-weight: 600;
}

.grid-graficos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2rem;
}

.bloque-grafico {
    background: white;
    border-left: 5px solid var(--accent-blue);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.bloque-grafico h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--accent-green);
    text-align: center;
}

.bloque-grafico canvas {
    max-width: 100%;
    height: 320px !important;
}

.insight {
    font-size: 0.95rem;
    margin-top: 1rem;
    color: #34495e;
    font-style: italic;
    text-align: center;
}

.niveles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.nivel-card {
    background: white;
    border-radius: 8px;
    padding: 1.8rem;
    border-left: 5px solid var(--accent-blue);
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

.nivel-card:hover {
    transform: translateY(-5px);
}

.nivel-titulo {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    padding-bottom: 10px;
    border-bottom: 3px solid;
}

.principiante { border-color: #3498db; color: #3498db; }
.intermedio { border-color: #f39c12; color: #f39c12; }
.avanzado { border-color: #27ae60; color: #27ae60; }

.nivel-card ul {
    list-style: none;
}

.nivel-card li {
    padding: 8px 0;
    position: relative;
    padding-left: 25px;
}

.nivel-card li:before {
    content: "✔";
    color: var(--accent-green);
    position: absolute;
    left: 0;
}

.acordeon {
    margin-bottom: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
}

.acordeon summary {
    padding: 15px 20px;
    background: #f8f9fa;
    font-weight: 600;
    cursor: pointer;
    font-size: 1.05rem;
}

.acordeon summary:hover {
    background: #e8f0f8;
}

.acordeon p {
    padding: 15px 20px;
    background: white;
}

.lista-recursos {
    list-style: none;
}

.lista-recursos li {
    margin-bottom: 12px;
}

.lista-recursos a {
    color: var(--accent-blue);
    text-decoration: none;
}

.lista-recursos a:hover {
    text-decoration: underline;
}

.cierre {
    text-align: center;
    background: linear-gradient(135deg, #27ae60, #3498db);
    color: white;
    border-radius: 12px;
    padding: 3rem 2rem;
}

.texto-cierre {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 2rem;
}

.cta {
    background: white;
    color: #27ae60;
    font-weight: bold;
    font-size: 1.4rem;
    padding: 16px 40px;
    border-radius: 50px;
    display: inline-block;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

footer {
    background: #2c3e50;
    color: #bdc3c7;
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
    margin-top: 4rem;
}

.footer-nota {
    opacity: 0.7;
    margin-top: 8px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .titulo-principal { font-size: 2rem; }
    .grid-graficos { grid-template-columns: 1fr; }
    .bloque-grafico canvas { height: 280px !important; }
}