/* Critical CSS para carga inicial rápida */
:root {
    --primary-color: #31a6a2;
    --primary-light: #5ce0dc;
    --secondary-color: #31a6a2ab;
    --accent-color: #f0b42b;
    --highlight-color: #ffd34e;
    --background-color: #fdfdff;
    --card-color: #ffffff;
    --text-color: #2c3e50;
    --text-light: #576574;
    --border-color: #e0e4e8;
    --hover-color: #f1f4ff;
    --shadow: 0 8px 25px rgba(74, 105, 189, 0.12);
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.06);
    --sidebar-width: 420px;
    --transition-speed: 0.35s;
    --transition-speed-fast: 0.2s;
    --border-radius: 6px;
    --border-radius-large: 10px;
    --header-height: 65px;
}

/* Estilos críticos para el header y navegación */
body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.6;
}

.header {
    background-color: var(--card-color);
    box-shadow: var(--shadow-light);
    position: fixed;
    width: 100%;
    z-index: 1000;
    top: 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    max-width: 1400px;
    margin: 0 auto;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-color);
    padding: 10px 15px;
    display: block;
    transition: color var(--transition-speed-fast);
}

.main-nav a:hover, .main-nav a.active {
    color: var(--primary-color);
}

/* Estilos críticos para el contenido principal */
main {
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* Estilos para dispositivos móviles */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
    }
}