:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-secondary: #c084fc;
    --border: #334155;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    max-width: 800px;
    margin: 40px auto;
    padding: 0 24px;
}

h1 {
    font-size: 2.5rem;
    color: var(--accent);
    border-bottom: 2px solid var(--border);
    padding-bottom: 12px;
    margin-bottom: 32px;
}

h2 {
    font-size: 1.8rem;
    color: var(--accent-secondary);
    margin-top: 40px;
}

h3 {
    font-size: 1.3rem;
    color: var(--accent);
    margin-top: 28px;
    display: flex;
    align-items: center;
}

h4 {
    font-size: 1.1rem;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 24px;
}

p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 16px;
}

ul {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px 20px 20px 40px;
    margin-bottom: 24px;
}

li {
    margin-bottom: 12px;
    color: var(--text-muted);
}

li:last-child {
    margin-bottom: 0;
}

strong {
    color: var(--accent);
}

.patrones-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.card-link {
    background: var(--card-bg, #ffffff);
    border: 1px solid var(--border, #e5e5e5);
    border-radius: 12px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow, 0 2px 4px rgba(0,0,0,0.02));
}

.card-link:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border-color: var(--accent, #2563eb);
}

.card-link h3 {
    margin-top: 0 !important;
    border: none !important;
    padding: 0 !important;
}

.btn-leer {
    margin-top: 16px;
    font-weight: bold;
    color: var(--accent, #2563eb);
    font-size: 0.95rem;
}

.tabla-contenedor {
    overflow-x: auto;
    margin: 25px 0;
    box-shadow: var(--shadow, 0 4px 6px -1px rgb(0 0 0 / 0.05));
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg, #ffffff);
    text-align: left;
}

th, td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border, #e5e5e5);
}

th {
    background-color: var(--primary, var(--accent, #2563eb));
    color: #ffffff;
    font-weight: 600;
}

/* Ajustes si usas el modo oscuro (Opción 1) */
@media (prefers-color-scheme: dark) {
    tr:hover { background-color: rgba(255,255,255,0.02); }
}
/* Ajuste si usas modo claro */
tr:hover { background-color: rgba(0,0,0,0.01); }